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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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Have you looked at this[^] article?
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yes i see that article , the Shift function dose not work with me ,
the encryption in the article is encrypt binary files , but i need to encrypt some text.
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mnabrisi wrote: the encryption in the article is encrypt binary files , but i need to encrypt some text.
What do you think text is? Text is a subset of binary. Anything that works for binary, will work for text...
Real men don't use instructions. They are only the manufacturers opinion on how to put the thing together.
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i know that .
--
but if you see my code you will know what i meaning .
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If you want it to be as slow as possible, then by all means do math with strings.
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There isn't one. You have to write it yourself.
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AFAIK there is no built in function to do this.
It would be fairly easy to write your own, though.
Assuming an 11 character string. One way would be to reverse the string and then create a new string from the last 10 characters of the original + the last character of the reversed string.
There are loads more ways though.
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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Here's a hint:
str.Substring(shiftAmount) + str.Substring(0, shiftAmount);
Do you really think it would be that hard to implement this yourself?
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it is very good idea
it has never crossed my mind ,it so easy and so small
i do this
public static String CircularShift(string Subject, int Count)
{
int l = Subject.Length;
char[] text = new char[l];
for (int i = 0; i < l; i++)
{
text[i] = Subject[(i + Count) % l];
}
String output = "";
for (int i = 0; i < l; i++)
{
output += text[i];
}
return output;
}
but i will use your idea .
thank you very much.
an thx for every one who trying to help .
modified on Sunday, November 14, 2010 1:36 PM
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please stop using confusing single-character identifiers such as this one:
l
which could be a letter or a digit depending on the font that is used to display it.
BTW: Most letters (such as i and n) are OK, however "L".ToLower() sure is not.
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