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Here is the obvious way (just an example):
byte[] arrARGBValues = { 255, 255, 0, 0, 255, 255, 0, 0, 255, 150, 255, 255 };
int lengthARGBValues = arrARGBValues.Length;
int lengthSubArrays = lengthARGBValues / 4;
byte[] arrAValues = new byte[lengthSubArrays];
byte[] arrRValues = new byte[lengthSubArrays];
byte[] arrGValues = new byte[lengthSubArrays];
byte[] arrBValues = new byte[lengthSubArrays];
for (int i = 0, j = 0; j < lengthSubArrays; i += 4, j++)
{
arrAValues[j] = arrARGBValues[i];
arrRValues[j] = arrARGBValues[i + 1];
arrGValues[j] = arrARGBValues[i + 2];
arrBValues[j] = arrARGBValues[i + 3];
}
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when you have an array (or any other collection) of colors, you can manipulate them directly. There is no need to first display them (i.e. their string representation) in a ListBox and then parse those strings, that approach is so wrong.
Here is an example of what one can do, without ListBox, without parsing text:
Color[] colors=new Color[3];
colors[0]=Color.Yellow;
colors[1]=Color.Red;
colors[2]=myImage.GetPixel(0,0);
or
List<Color> colors=new List<Color>();
colors.Add(Color.Yellow);
colors.Add(Color.Red);
colors.Add(myImage.GetPixel(0,0));
...
then
int sumRed=0;
int count=0;
foreach (Color color in colors) {
sumRed+=color.R;
count++;
}
int averageRed=sumRed/count;
see? no ListBox, no strings, no problems. Also less code, and much faster.
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oh because my array consist of many entries made up of A, R, G, B. i dont think i can make use of your methods as listed above.
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pancakeleh wrote: my array consist of many entries made up of A, R, G, B
and that is completely silly, why would you mix up things that you later on need separately?
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in the first place, it is mixed up. tts why i would wanna separate it.
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If you are using C# 4 you can do it like this:
string[] argbArray = new string[] { "A=255", "R=255", "G=0", "B=0", "A=255", "R=0", "G=255", "B=0" };
string[] rArray = argbArray.Where(s => s.StartsWith("R=")).ToArray();
string[] gArray = argbArray.Where(s => s.StartsWith("G=")).ToArray();
string[] bArray = argbArray.Where(s => s.StartsWith("B=")).ToArray();
int[] argbintArray = new int[] { 255, 255, 0, 0, 255, 0, 255, 0 };
int[] rintArray = Enumerable.Range(0, argbintArray.Length).Where(i => i % 4 == 1).Select(i => argbintArray[i]).ToArray();
int[] gintArray = Enumerable.Range(0, argbintArray.Length).Where(i => i % 4 == 2).Select(i => argbintArray[i]).ToArray();
int[] bintArray = Enumerable.Range(0, argbintArray.Length).Where(i => i % 4 == 3).Select(i => argbintArray[i]).ToArray();
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am i still able to do this if my array has got 400 entries?
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Either method will work with any sized array...
The first method iterates over each entry in the souce array and pulls out values that start with whatever we are looking for ie "R=" and puts them into a new array.
The second method works like this:
Create an array of integers that represent the indexes in the source array Enumerable.Range(0, argbintArray.Length)
In groups of 4 select every seconds index .Where(i => i % 4 == 1)
Select the items out of the source array at the identified indexes .Select(i => argbintArray[i])
Hopefully that makes sense. Try outputing the result of each step it might help clear up what is happening.
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i will try it out thanks 
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if i do not use c# 4 is there any way i can do it instead?
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Without Linq then using loops like in first reponse by Nuri Ismail is the best approach.
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I wanted to get ScrollIntoView(SelectedItem); and highlight the selected item when initialized (tried to manually set the item to the 21st record just for testing purposes). It works fine if I manually select the item but doesn't work if I manually try to set the initial selectitem. This is based onhttp://www.eggheadcafe.com/tutorials/aspnet/5af72df7-5b0b-4ac2-be96-e24127040bbf/wpf-datagrid-as-combobox-dropdown-part-2.aspx[^]
Here is the code:
Window1.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Windows.Forms;
namespace WPFDataGridAsComboBoxDropdown
{
public partial class Window1 : Window, INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private Customer selectedCustomer;
private bool isEditingCustomer;
Microsoft.Windows.Controls.DataGrid grid = null;
public Window1()
{
InitializeComponent();
SelectedCustomer = CustomerList[21];
ComboBox1.SelectedIndex = 21;
ComboBox1.SelectedItem = CustomerList[21];
}
public Customer SelectedCustomer
{
get
{
return selectedCustomer;
}
set
{
if (object.ReferenceEquals(selectedCustomer, value) != true)
{
selectedCustomer = value;
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs("SelectedCustomer"));
}
IsEditingCustomer = false;
}
}
}
public bool IsEditingCustomer
{
get
{
return isEditingCustomer;
}
set
{
if (isEditingCustomer.Equals(value) != true)
{
isEditingCustomer = value;
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs("IsEditingCustomer"));
}
}
}
}
private void OnLoadedGrid(object sender, RoutedEventArgs e)
{
grid = (Microsoft.Windows.Controls.DataGrid)sender;
if (ComboBox1.SelectedItem != null && grid != null)
{
grid.UpdateLayout();
grid.UpdateLayout();
grid.ScrollIntoView(ComboBox1.SelectedItem);
}
}
Customers _CustomerList = new Customers();
public Customers CustomerList
{
get { return _CustomerList; }
set { _CustomerList = value; }
}
}
public class MyDataGrid : Microsoft.Windows.Controls.DataGrid
{
protected override void OnSelectionChanged(SelectionChangedEventArgs e)
{
base.OnSelectionChanged(e);
ScrollIntoView(SelectedItem);
}
}
public class Customers : ObservableCollection<Customer>
{
public Customers()
{
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
Add(new Customer { Name = "Mike", Address = "Canada", TelephoneNumber = "748-9763" });
Add(new Customer { Name = "Bill", Address = "Japan", TelephoneNumber = "839-3858" });
Add(new Customer { Name = "John", Address = "USA", TelephoneNumber = "123-4567" });
}
}
public class Customer
{
public string Name { get; set; }
public string Address { get; set; }
public string TelephoneNumber { get; set; }
}
}
Here is Window1.xaml
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WPFDataGridAsComboBoxDropdown"
x:Class="WPFDataGridAsComboBoxDropdown.Window1"
Title="Window1"
SizeToContent="WidthAndHeight"
xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero"
xmlns:toolkit="http://schemas.microsoft.com/wpf/2008/toolkit"
xmlns:mytoolkit="clr-namespace:WPFDataGridAsComboBoxDropdown">
<Window.Resources>
<local:Customers x:Key="Customers"/>
<Style x:Key="ComboBoxFocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle SnapsToDevicePixels="true" Margin="4,4,21,4" Stroke="Black" StrokeDashArray="1 2" StrokeThickness="1"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<LinearGradientBrush x:Key="ButtonNormalBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#F3F3F3" Offset="0"/>
<GradientStop Color="#EBEBEB" Offset="0.5"/>
<GradientStop Color="#DDDDDD" Offset="0.5"/>
<GradientStop Color="#CDCDCD" Offset="1"/>
</LinearGradientBrush>
<SolidColorBrush x:Key="ButtonNormalBorder" Color="#FF707070"/>
<Geometry x:Key="DownArrowGeometry">M 0 0 L 3.5 4 L 7 0 Z</Geometry>
<Style x:Key="ComboBoxReadonlyToggleButton" TargetType="{x:Type ToggleButton}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="ClickMode" Value="Press"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<Microsoft_Windows_Themes:ButtonChrome SnapsToDevicePixels="true" x:Name="Chrome" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}">
<Grid HorizontalAlignment="Right" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}">
<Path HorizontalAlignment="Center" Margin="3,1,0,0" x:Name="Arrow" VerticalAlignment="Center" Fill="Black" Data="{StaticResource DownArrowGeometry}"/>
</Grid>
</Microsoft_Windows_Themes:ButtonChrome>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter Property="RenderPressed" TargetName="Chrome" Value="true"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Fill" TargetName="Arrow" Value="#AFAFAF"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<LinearGradientBrush x:Key="TextBoxBorder" EndPoint="0,20" StartPoint="0,0" MappingMode="Absolute">
<GradientStop Color="#ABADB3" Offset="0.05"/>
<GradientStop Color="#E2E3EA" Offset="0.07"/>
<GradientStop Color="#E3E9EF" Offset="1"/>
</LinearGradientBrush>
<Style x:Key="ComboBoxEditableTextBox" TargetType="{x:Type TextBox}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="AllowDrop" Value="true"/>
<Setter Property="MinWidth" Value="0"/>
<Setter Property="MinHeight" Value="0"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TextBox}">
<ScrollViewer Focusable="false" Background="Transparent" x:Name="PART_ContentHost" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="ComboBoxToggleButton" TargetType="{x:Type ToggleButton}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="ClickMode" Value="Press"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<Microsoft_Windows_Themes:ButtonChrome SnapsToDevicePixels="true" x:Name="Chrome" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}" RoundCorners="false">
<Path HorizontalAlignment="Center" Margin="0,1,0,0" x:Name="Arrow" VerticalAlignment="Center" Fill="Black" Data="{StaticResource DownArrowGeometry}"/>
</Microsoft_Windows_Themes:ButtonChrome>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter Property="RenderPressed" TargetName="Chrome" Value="true"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Fill" TargetName="Arrow" Value="#AFAFAF"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<ControlTemplate x:Key="ComboBoxEditableTemplate" TargetType="{x:Type ComboBox}">
<Grid SnapsToDevicePixels="true" x:Name="Placement">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Popup AllowsTransparency="true" IsOpen="{Binding Path=IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}" Placement="Bottom" PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" x:Name="PART_Popup" Grid.ColumnSpan="2">
<Microsoft_Windows_Themes:SystemDropShadowChrome MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{Binding Path=ActualWidth, ElementName=Placement}" x:Name="Shdw" Color="Transparent">
<Border x:Name="DropDownBorder" Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}" BorderBrush="{DynamicResource {x:Static SystemColors.WindowFrameBrushKey}}" BorderThickness="1">
<ScrollViewer>
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" KeyboardNavigation.DirectionalNavigation="Contained"/>
</ScrollViewer>
</Border>
</Microsoft_Windows_Themes:SystemDropShadowChrome>
</Popup>
<Microsoft_Windows_Themes:ListBoxChrome x:Name="Border" Grid.ColumnSpan="2" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" RenderFocused="{TemplateBinding IsKeyboardFocusWithin}" RenderMouseOver="{TemplateBinding IsMouseOver}"/>
<TextBox HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" Margin="{TemplateBinding Padding}" x:Name="PART_EditableTextBox" Style="{StaticResource ComboBoxEditableTextBox}" IsReadOnly="{Binding Path=IsReadOnly, RelativeSource={RelativeSource TemplatedParent}}"/>
<ToggleButton Style="{StaticResource ComboBoxToggleButton}" Grid.Column="1" IsChecked="{Binding Path=IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsKeyboardFocusWithin" Value="true">
<Setter Property="Foreground" Value="Black"/>
</Trigger>
<Trigger Property="IsDropDownOpen" Value="true">
<Setter Property="RenderFocused" TargetName="Border" Value="true"/>
</Trigger>
<Trigger Property="HasItems" Value="false">
<Setter Property="Height" TargetName="DropDownBorder" Value="95"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
<Setter Property="Background" Value="#FFF4F4F4"/>
</Trigger>
<Trigger Property="IsGrouping" Value="true">
<Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
</Trigger>
<Trigger Property="HasDropShadow" SourceName="PART_Popup" Value="true">
<Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/>
<Setter Property="Color" TargetName="Shdw" Value="#71000000"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
<Style x:Key="ComboBoxStyle1" TargetType="{x:Type ComboBox}">
<Setter Property="FocusVisualStyle" Value="{StaticResource ComboBoxFocusVisual}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}"/>
<Setter Property="Background" Value="{StaticResource ButtonNormalBackground}"/>
<Setter Property="BorderBrush" Value="{StaticResource ButtonNormalBorder}"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="Padding" Value="4,3"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate
TargetType="{x:Type ComboBox}">
<Grid
SnapsToDevicePixels="true"
x:Name="MainGrid">
<Grid.ColumnDefinitions>
<ColumnDefinition
Width="*"/>
<ColumnDefinition
MinWidth="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"
Width="0"/>
</Grid.ColumnDefinitions>
<Popup
AllowsTransparency="true"
IsOpen="{Binding Path=IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}"
Placement="Bottom"
PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}"
Margin="1"
x:Name="PART_Popup"
Grid.ColumnSpan="2">
<Microsoft_Windows_Themes:SystemDropShadowChrome
MaxHeight="{TemplateBinding MaxDropDownHeight}"
MinWidth="{Binding Path=ActualWidth, ElementName=MainGrid}"
x:Name="Shdw"
Color="Transparent">
<Border
x:Name="DropDownBorder"
Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"
BorderBrush="{DynamicResource {x:Static SystemColors.WindowFrameBrushKey}}"
BorderThickness="1">
<mytoolkit:MyDataGrid
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
ItemsSource="{TemplateBinding ItemsSource}"
AutoGenerateColumns="False"
IsReadOnly="True"
SelectionMode="Single"
HeadersVisibility="All"
SelectionUnit="FullRow"
Loaded="OnLoadedGrid"
SelectedItem="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=SelectedItem}">
<mytoolkit:MyDataGrid.Columns>
<toolkit:DataGridTextColumn
Header="Name"
Width="100"
Binding="{Binding Name}"/>
<toolkit:DataGridTextColumn
Header="Address"
Width="100"
Binding="{Binding Address}"/>
<toolkit:DataGridTextColumn
Width="100"
Header="Telephone No."
Binding="{Binding TelephoneNumber}"/>
</mytoolkit:MyDataGrid.Columns>
</mytoolkit:MyDataGrid>
</Border>
</Microsoft_Windows_Themes:SystemDropShadowChrome>
</Popup>
<ToggleButton
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
Style="{StaticResource ComboBoxReadonlyToggleButton}"
Grid.ColumnSpan="2"
IsChecked="{Binding Path=IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"/>
<ContentPresenter
Name="ContentPres"
IsHitTestVisible="false"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
Margin="{TemplateBinding Padding}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding SelectionBoxItem}"
ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}"
ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger
Property="HasDropShadow"
SourceName="PART_Popup"
Value="true">
<Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/>
<Setter Property="Color" TargetName="Shdw" Value="#71000000"/>
</Trigger>
<Trigger Property="HasItems" Value="false">
<Setter Property="Height" TargetName="DropDownBorder" Value="95"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
<Setter Property="Background" Value="#FFF4F4F4"/>
</Trigger>
<Trigger Property="IsGrouping" Value="true">
<Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsEditable" Value="true">
<Setter Property="BorderBrush" Value="{StaticResource TextBoxBorder}"/>
<Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Padding" Value="3"/>
<Setter Property="Template" Value="{StaticResource ComboBoxEditableTemplate}"/>
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<Grid>
<ComboBox
Name="ComboBox1"
Margin="4"
Height="23"
Width="250"
ItemsSource="{StaticResource Customers}"
Style="{DynamicResource ComboBoxStyle1}"
SelectedItem="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}, Path=SelectedCustomer}"
IsDropDownOpen="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}, Path=IsEditingCustomer}">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=Name}" Margin="4,0"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
</Grid>
</Window>
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<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WPFDataGridAsComboBoxDropdown"
x:Class="WPFDataGridAsComboBoxDropdown.Window1"
Title="Window1"
SizeToContent="WidthAndHeight"
xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero"
xmlns:toolkit="http://schemas.microsoft.com/wpf/2008/toolkit"
xmlns:mytoolkit="clr-namespace:WPFDataGridAsComboBoxDropdown">
<Window.Resources>
<local:Customers x:Key="Customers"/>
<Style x:Key="ComboBoxFocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle SnapsToDevicePixels="true" Margin="4,4,21,4" Stroke="Black" StrokeDashArray="1 2" StrokeThickness="1"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<LinearGradientBrush x:Key="ButtonNormalBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#F3F3F3" Offset="0"/>
<GradientStop Color="#EBEBEB" Offset="0.5"/>
<GradientStop Color="#DDDDDD" Offset="0.5"/>
<GradientStop Color="#CDCDCD" Offset="1"/>
</LinearGradientBrush>
<SolidColorBrush x:Key="ButtonNormalBorder" Color="#FF707070"/>
<Geometry x:Key="DownArrowGeometry">M 0 0 L 3.5 4 L 7 0 Z</Geometry>
<Style x:Key="ComboBoxReadonlyToggleButton" TargetType="{x:Type ToggleButton}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="ClickMode" Value="Press"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<Microsoft_Windows_Themes:ButtonChrome SnapsToDevicePixels="true" x:Name="Chrome" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}">
<Grid HorizontalAlignment="Right" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}">
<Path HorizontalAlignment="Center" Margin="3,1,0,0" x:Name="Arrow" VerticalAlignment="Center" Fill="Black" Data="{StaticResource DownArrowGeometry}"/>
</Grid>
</Microsoft_Windows_Themes:ButtonChrome>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter Property="RenderPressed" TargetName="Chrome" Value="true"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Fill" TargetName="Arrow" Value="#AFAFAF"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<LinearGradientBrush x:Key="TextBoxBorder" EndPoint="0,20" StartPoint="0,0" MappingMode="Absolute">
<GradientStop Color="#ABADB3" Offset="0.05"/>
<GradientStop Color="#E2E3EA" Offset="0.07"/>
<GradientStop Color="#E3E9EF" Offset="1"/>
</LinearGradientBrush>
<Style x:Key="ComboBoxEditableTextBox" TargetType="{x:Type TextBox}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="AllowDrop" Value="true"/>
<Setter Property="MinWidth" Value="0"/>
<Setter Property="MinHeight" Value="0"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TextBox}">
<ScrollViewer Focusable="false" Background="Transparent" x:Name="PART_ContentHost" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="ComboBoxToggleButton" TargetType="{x:Type ToggleButton}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="ClickMode" Value="Press"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<Microsoft_Windows_Themes:ButtonChrome SnapsToDevicePixels="true" x:Name="Chrome" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}" RoundCorners="false">
<Path HorizontalAlignment="Center" Margin="0,1,0,0" x:Name="Arrow" VerticalAlignment="Center" Fill="Black" Data="{StaticResource DownArrowGeometry}"/>
</Microsoft_Windows_Themes:ButtonChrome>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter Property="RenderPressed" TargetName="Chrome" Value="true"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Fill" TargetName="Arrow" Value="#AFAFAF"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<ControlTemplate x:Key="ComboBoxEditableTemplate" TargetType="{x:Type ComboBox}">
<Grid SnapsToDevicePixels="true" x:Name="Placement">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Popup AllowsTransparency="true" IsOpen="{Binding Path=IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}" Placement="Bottom" PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" x:Name="PART_Popup" Grid.ColumnSpan="2">
<Microsoft_Windows_Themes:SystemDropShadowChrome MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{Binding Path=ActualWidth, ElementName=Placement}" x:Name="Shdw" Color="Transparent">
<Border x:Name="DropDownBorder" Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}" BorderBrush="{DynamicResource {x:Static SystemColors.WindowFrameBrushKey}}" BorderThickness="1">
<ScrollViewer>
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" KeyboardNavigation.DirectionalNavigation="Contained"/>
</ScrollViewer>
</Border>
</Microsoft_Windows_Themes:SystemDropShadowChrome>
</Popup>
<Microsoft_Windows_Themes:ListBoxChrome x:Name="Border" Grid.ColumnSpan="2" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" RenderFocused="{TemplateBinding IsKeyboardFocusWithin}" RenderMouseOver="{TemplateBinding IsMouseOver}"/>
<TextBox HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" Margin="{TemplateBinding Padding}" x:Name="PART_EditableTextBox" Style="{StaticResource ComboBoxEditableTextBox}" IsReadOnly="{Binding Path=IsReadOnly, RelativeSource={RelativeSource TemplatedParent}}"/>
<ToggleButton Style="{StaticResource ComboBoxToggleButton}" Grid.Column="1" IsChecked="{Binding Path=IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsKeyboardFocusWithin" Value="true">
<Setter Property="Foreground" Value="Black"/>
</Trigger>
<Trigger Property="IsDropDownOpen" Value="true">
<Setter Property="RenderFocused" TargetName="Border" Value="true"/>
</Trigger>
<Trigger Property="HasItems" Value="false">
<Setter Property="Height" TargetName="DropDownBorder" Value="95"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
<Setter Property="Background" Value="#FFF4F4F4"/>
</Trigger>
<Trigger Property="IsGrouping" Value="true">
<Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
</Trigger>
<Trigger Property="HasDropShadow" SourceName="PART_Popup" Value="true">
<Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/>
<Setter Property="Color" TargetName="Shdw" Value="#71000000"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
<Style x:Key="ComboBoxStyle1" TargetType="{x:Type ComboBox}">
<Setter Property="FocusVisualStyle" Value="{StaticResource ComboBoxFocusVisual}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}"/>
<Setter Property="Background" Value="{StaticResource ButtonNormalBackground}"/>
<Setter Property="BorderBrush" Value="{StaticResource ButtonNormalBorder}"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="Padding" Value="4,3"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate
TargetType="{x:Type ComboBox}">
<Grid
SnapsToDevicePixels="true"
x:Name="MainGrid">
<Grid.ColumnDefinitions>
<ColumnDefinition
Width="*"/>
<ColumnDefinition
MinWidth="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"
Width="0"/>
</Grid.ColumnDefinitions>
<Popup
AllowsTransparency="true"
IsOpen="{Binding Path=IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}"
Placement="Bottom"
PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}"
Margin="1"
x:Name="PART_Popup"
Grid.ColumnSpan="2">
<Microsoft_Windows_Themes:SystemDropShadowChrome
MaxHeight="{TemplateBinding MaxDropDownHeight}"
MinWidth="{Binding Path=ActualWidth, ElementName=MainGrid}"
x:Name="Shdw"
Color="Transparent">
<Border
x:Name="DropDownBorder"
Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"
BorderBrush="{DynamicResource {x:Static SystemColors.WindowFrameBrushKey}}"
BorderThickness="1">
<mytoolkit:MyDataGrid
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
ItemsSource="{TemplateBinding ItemsSource}"
AutoGenerateColumns="False"
IsReadOnly="True"
SelectionMode="Single"
HeadersVisibility="All"
SelectionUnit="FullRow"
Loaded="OnLoadedGrid"
SelectedItem="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=SelectedItem}">
<mytoolkit:MyDataGrid.Columns>
<toolkit:DataGridTextColumn
Header="Name"
Width="100"
Binding="{Binding Name}"/>
<toolkit:DataGridTextColumn
Header="Address"
Width="100"
Binding="{Binding Address}"/>
<toolkit:DataGridTextColumn
Width="100"
Header="Telephone No."
Binding="{Binding TelephoneNumber}"/>
</mytoolkit:MyDataGrid.Columns>
</mytoolkit:MyDataGrid>
</Border>
</Microsoft_Windows_Themes:SystemDropShadowChrome>
</Popup>
<ToggleButton
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
Style="{StaticResource ComboBoxReadonlyToggleButton}"
Grid.ColumnSpan="2"
IsChecked="{Binding Path=IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"/>
<ContentPresenter
Name="ContentPres"
IsHitTestVisible="false"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
Margin="{TemplateBinding Padding}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding SelectionBoxItem}"
ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}"
ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger
Property="HasDropShadow"
SourceName="PART_Popup"
Value="true">
<Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/>
<Setter Property="Color" TargetName="Shdw" Value="#71000000"/>
</Trigger>
<Trigger Property="HasItems" Value="false">
<Setter Property="Height" TargetName="DropDownBorder" Value="95"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
<Setter Property="Background" Value="#FFF4F4F4"/>
</Trigger>
<Trigger Property="IsGrouping" Value="true">
<Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsEditable" Value="true">
<Setter Property="BorderBrush" Value="{StaticResource TextBoxBorder}"/>
<Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Padding" Value="3"/>
<Setter Property="Template" Value="{StaticResource ComboBoxEditableTemplate}"/>
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<Grid>
<ComboBox
Name="ComboBox1"
Margin="4"
Height="23"
Width="250"
ItemsSource="{StaticResource Customers}"
Style="{DynamicResource ComboBoxStyle1}"
SelectedItem="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}, Path=SelectedCustomer}"
IsDropDownOpen="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}, Path=IsEditingCustomer}">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=Name}" Margin="4,0"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
</Grid>
</Window>
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Please do not post complete programs like this; identify your problem and post only the code that is relevant. Members here do not have the time to read through this amount of code.
Just say 'NO' to evaluated arguments for diadic functions! Ash
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"4. Keep the question as brief as possible. If you have to include code, include the smallest snippet of code you can."
That means: "Don't post your entire program: no-one will read it."
Real men don't use instructions. They are only the manufacturers opinion on how to put the thing together.
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hello all,
I'm working on an application developped under FOXPRO, the problem is that the deployment procedure is so vulnerable, so that once installed, anyone could copy all its files and past them to another computer and the application will just work fine.
1. would you please advise what it could be done in order to grantee a safe deployment that it can't be duplicated
2. does the suggested process could be developed using C# knowing that the application is developed under FOXPRO
Thank you so much for your usual support
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michael_jhons wrote: 1. would you please advise what it could be done in order to grantee a safe deployment that it can't be duplicated
There's no guarantees, especially not in copy-protection. The only files that can't be copied, are the ones that aren't readable. One option is to encrypt the files, and decrypt them when you need 'em. Another option would be to hide a file on the system, and check for it's existence on start-up. If they forgot to copy the hidden file, you'll know that it's an "illegal" installation.
..but there's no guarantee. It'll be merely harder to copy the data, not impossible.
michael_jhons wrote: 2. does the suggested process could be developed using C# knowing that the application is developed under FOXPRO
Like some kind of wrapper application? 
I are Troll 
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public static string
CircularShift
(
this string Subject
,
int Count
)
{
string result ;
// Left as an exercise...
return ( result ) ;
}
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mnabrisi wrote: any body can help me to find function that can do left Circular shift for any string
Indeed I can. The first step you need to do is to break the problem down into smaller steps. Here, it seems that your logic is - for any string, take the first character off it and put it at the end. Consider your edge cases - what happens if no characters are input? What about if only one character is input?
There you go - you now know what the problem is that you're trying to solve. Good luck.
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If you have to do a circular shift on a number why are you faffing about with strings?
There are plenty of examples on the web to do this. Here[^], for example.
There are loads of others though, simply search on c# circularleftshift.
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
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Henry Minute wrote: If you have to do a circular shift on a number why are you faffing about with strings?
because h1 and h2 is result from function that return string .
i will see if i can use another function , or convert the return data type .
thx henry .
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Try here[^].
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
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