Re: Binding Selected Value to Combobox - WPF Discussion Boards

Michel Godfroid29-Apr-10 23:34

Michel Godfroid

29-Apr-10 23:34

Do you have to do it in the client? If you can do it on the server, I'd just create a memory device context, and draw on that one.

#realJSOP29-Apr-10 23:52

#realJSOP

29-Apr-10 23:52

Michel Godfroid wrote:
Do you have to do it in the client?

That would be preferred, but it looks like it's impossible.

Michel Godfroid wrote:
If you can do it on the server, I'd just create a memory device context, and draw on that one.

Yeah, I mentioned that in my edit. At this point, I have to decide whether I want to do it in our web service, or create an aspx page that does it in the code behind.

.45 ACP - because shooting twice is just silly
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Tim Yen1-May-10 3:08

Tim Yen

1-May-10 3:08

Does the WriteableBitmap class help

http://www.wintellect.com/CS/blogs/jprosise/archive/2009/03/23/silverlight-3-s-new-writeablebitmap.aspx[^]

This link has an example

Display an Exception in Treeview with innerexception being child

#realJSOP3-May-10 2:56

#realJSOP

3-May-10 2:56

See new message in this forum.

Troyzajac29-Apr-10 5:19

Troyzajac

29-Apr-10 5:19

I am trying to display an exception in a treeview with each innerexception being a child.

Here is what I have so far, but this only displays the exception.tostring() values.

<GridViewColumn Header="Exception" Width="Auto" DisplayMemberBinding="">
    <GridViewColumn.CellTemplate>
        <DataTemplate>
            <TreeView ItemsSource="{Binding Path=Exception}">
                <TreeView.ItemTemplate>
                    <HierarchicalDataTemplate DataType="{x:Type sys:Exception}"
                                              ItemsSource="{Binding Path=InnerException}">
                        <TextBlock Text="{Binding Path=Message}"/>
                    </HierarchicalDataTemplate>
                </TreeView.ItemTemplate>
            </TreeView>
        </DataTemplate>
    </GridViewColumn.CellTemplate>
</GridViewColumn>

Troy Zajac

Re: Display an Exception in Treeview with innerexception being child

rhuiden30-Apr-10 4:10

rhuiden

30-Apr-10 4:10

I think the real problem with this method is that InnerException is not a collection. You may be able to use a converter to convert InnerException to an array of exception objects. However, there is a much easier method.

Here is a simple sample Window that does something similar to what I think you want.

XAML

<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:s="clr-namespace:System;assembly=mscorlib"
    Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <DataTemplate DataType="{x:Type s:Exception}">
            <Expander Margin="20,0,0,0"  Header="{Binding Message}" Content="{Binding InnerException}"/>
        </DataTemplate>
    </Window.Resources>
    <DockPanel>
        <Button DockPanel.Dock="Bottom" Click="Button_Click">Error!</Button>
        <ContentPresenter Name="Bob" />
    </DockPanel>
</Window>

CODE (Pardon the VB)

Class MainWindow
	Private Sub Button_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
		Try
			a()
		Catch ex As Exception
			Me.Bob.Content = ex
		End Try
	End Sub

	Private Sub a()
		Try
			b()
		Catch ex As Exception
			Throw New ArgumentException("WOW!", ex)
		End Try
	End Sub

	Private Sub b()
		Try
			c()
		Catch ex As Exception
			Throw New InvalidCastException("no good", ex)
		End Try
	End Sub

	Private Sub c()
		Throw New InvalidOperationException("Bad magic")
	End Sub
End Class

I use WPF's awesomeness with DataTemplates. Any exception object it displays will look like an Expander.

Binding Selected Value to Combobox

LePoulpe30329-Apr-10 4:08

LePoulpe303

29-Apr-10 4:08

Hi,

I have a problem I can't get solved since days. I'm actually testing nHydrate to generate a DAL to my database.
The case is pretty simple :

I have an object called Maintable

class Maintable {
		bool? Booleanfield { get; set; }
		DateTime? Datefield { get; set; }
		int Idmaintable { get; }
		string Stringfield { get; set; }
		int? Tostatic { get; set; }
}

In my database I have a static data table ; nHydrate generated for it a collection of objects

class Staticdatatable {
		int Idstatic { get; }
		string Name { get; }
}

The "Tostatic" field of Maintable object points to Idstatic field in Staticdatatable

So, now I'm trying to perform the following binding :
- Bind combobox list to Staticdatatable collection (this works fine)
- Bind combobox selected item to the Id of the Maintable object (problems start here)

I've bound all my controls in the window correctly to the Maintable object ; but I can't have the combobox displays the name of the corresponding Tostatic value.

The code-behind is :

Maintable CurrentItem = ... // retrieve an Maintable object to display
// EditionPanel is the main panel of the window 
EditionPanel.DataContext = CurrentItem; 
// nHydrate RunSelect() allows to fill combobox from collection of Staticdatatable objects 
cmbStatic.DataContext = StaticdatatableCollection.RunSelect();

The XAML code for combobox is :

<ComboBox x:Name="cmbStatic" ItemsSource="{Binding}" DisplayMemberPath="Name" SelectedValuePath="????"  SelectedValue="????"></ComboBox>

My question is : How can I bind the Selected Value to the CurrentItem.Tostatic field defined in code-behind ?

If required I can post the entire code.

Thanks by advance for your help.

Re: Binding Selected Value to Combobox

Parwej Ahamad29-Apr-10 6:14

Parwej Ahamad

29-Apr-10 6:14

Post here your XAML piece of code would be helpful.

Parwej Ahamad
ahamad.parwej@gmail.com

Re: Binding Selected Value to Combobox

LePoulpe3032-May-10 23:28

LePoulpe303

2-May-10 23:28

OK Sry for late answer

here's the XAML Code (please note I tried to use a textblock to bind the combobox to)

<Window x:Class="WpfnHydrate.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:nhy="clr-namespace:Maxmat.TestnHydrate.Business.Objects;assembly=Maxmat.TestnHydrate"
xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
Title="Window1" Height="379" Width="461" Loaded="Window_Loaded">
<Window.Resources>
<Style TargetType="Button">
<Setter Property="Width" Value="50"></Setter>
<Setter Property="Margin" Value="10"></Setter>
</Style>
</Window.Resources>
<StackPanel>
<Border>
<WrapPanel>
<ComboBox Width="50" x:Name="lstMainTable" ItemsSource="{Binding}" DisplayMemberPath="Idmaintable" SelectionChanged="lstMainTable_SelectionChanged"></ComboBox>
</WrapPanel>
</Border>
<StackPanel x:Name="EditionPanel">
<WrapPanel>
<Label>StringField:</Label>
<TextBox Text="{Binding Path=Stringfield, Mode=TwoWay}"></TextBox>
</WrapPanel>
<WrapPanel>
<Label>DateField:</Label>
<my:DatePicker SelectedDate="{Binding Path=Datefield, Mode=TwoWay}" Height="25" Name="datePicker1" Width="115" xmlns:my="http://schemas.microsoft.com/wpf/2008/toolkit" />
</WrapPanel>
<WrapPanel>
<Label>BooleanField:</Label>
<CheckBox IsChecked="{Binding Path=Booleanfield, Mode=TwoWay}"></CheckBox>
<Label>Static Combo</Label>
<ComboBox x:Name="cmbStatic" ItemsSource="{Binding}" DisplayMemberPath="Name" SelectedValuePath="Idstatic" SelectedValue="{Binding Path=Text,ElementName=ToStaticValue,Mode=OneWay, diag:PresentationTraceSources.TraceLevel=High}"></ComboBox>
<TextBlock x:Name="ToStaticValue" Text="{Binding Path=Tostatic}"></TextBlock>
</WrapPanel>
<WrapPanel Margin="10" >
<Button x:Name="cmdNew" Click="cmdNew_Click">New</Button>
<Button x:Name="cmdSave" Click="cmdSave_Click">Save</Button>
</WrapPanel>
</StackPanel>
</StackPanel>
</Window>

Database Populated Menu

Tripathi Swati29-Apr-10 0:53

Tripathi Swati

29-Apr-10 0:53

Hi all,

I want to create database populated menu where menu.xaml file should be generated dynamically means my stroed procedure will return result on basis of user Group and that should assign or create xaml file and now dynamically generated file will assign to menu control ..

I have done this in .Net site but dont know its possible with silverlight or not.

I am new to Silverlight , So Please help me...

Reasons are not Important but Results are Important.
Swati Tripathi

Re: Database Populated Menu

Abhinav S29-Apr-10 18:29

Re: Database Populated Menu

29-Apr-10 18:29

This is possible in Silverlight.

However, you cannot access stored procedures using Ado.Net (as Ado.Net are not available in SL).
You will need to use either a web service or entity framework.

Tripathi Swati29-Apr-10 18:42

Tripathi Swati

29-Apr-10 18:42

Thanks for your reply
but i want to know silverlight code sample & yes i am aware of SL will understand xml only.

I hav tried sample which is given in demo for menu but Over there we have static menu.xaml which i dont want to use .

Please help me ....

Reasons are not Important but Results are Important.
Swati Tripathi

Re: Database Populated Menu

Abhinav S29-Apr-10 19:18

how can I apply textblock properties to Path???

29-Apr-10 19:18

See here for a menu control example.

urooj_mahmood28-Apr-10 21:50

Re: how can I apply textblock properties to Path???

28-Apr-10 21:50

Hi..how can I apply textblock properties to Path???
I have convert textblock to path i have applied font , size & color property to it but problem have occured when I am trying to apply textwrapping, alignment, textdecoration & font weight properties but these are not working.
any solution to resolve this problem???

reply fast
thnxxx

Abhinav S29-Apr-10 18:34

Re: how can I apply textblock properties to Path???

29-Apr-10 18:34

This may give you some ideas

urooj_mahmood29-Apr-10 20:24

Re: how can I apply textblock properties to Path???

29-Apr-10 20:24

yes i have already used this but i need to apply all TextBlock properties to Path....any idea??

thnxx

Abhinav S30-Apr-10 18:45

Re: how can I apply textblock properties to Path???

30-Apr-10 18:45

Properties like textdecoration and fontweight are not valid properties for a Path and so they cannot be applied directly. You will need to create new dependency properties for a path and then implement your own logic to simulate this behaviour.

urooj_mahmood2-May-10 20:16

Re: how can I apply textblock properties to Path???

2-May-10 20:16

any example...?? how can I create these properties on Path???
reply fast??

Abhinav S2-May-10 21:04

Re: how can I apply textblock properties to Path???

2-May-10 21:04

To create custom properties, see here.

For an e.g. on a control see here.

Unfortunately I could not find an example where a Path is used.

urooj_mahmood2-May-10 22:08