WPF DataGrid – Styling rows and columns based on Header conditions and other properties

Vincent Sibal's Blog : .NET 3.5 SP1 and WPF DataGrid CTP are out now!

Vincent Sibal's Blog : .NET 3.5 SP1 and WPF DataGrid CTP are out now! — Tue, 16 Sep 2008 18:14:42 GMT

PingBack from http://blogs.msdn.com/vinsibal/archive/2008/08/11/net-3-5-sp1-and-wpf-datagrid-ctp-is-out-now.aspx

WPF DataGrid - Clipboard Paste Sample

Vincent Sibal's Blog — Fri, 19 Sep 2008 18:07:04 GMT

In the v1 release (and CTP) of the WPF DataGrid there will be support for Clipboard.Copy but no support

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

Karen — Wed, 01 Oct 2008 12:01:30 GMT

I've merged the resources from PresentationFramework.Aero.dll in App.xaml, and added the DataGrid to a window, along with other controls.

When running on XP, all other controls appear with AeroNormalColor theme, while the grid appears on Classic theme.

How to address this issue?

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

vinsibal — Fri, 03 Oct 2008 17:23:53 GMT

Karen,

It is possible that the DataGrid cannot find the application specific theme that you set as it defaults to Classic. Could you explain a bit more on how you merged the resources from PresentationFramework.Aero.dll and maybe a code snippet.

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

Carinemaalouf — Sat, 04 Oct 2008 09:35:23 GMT

In my App.xaml

i put the following code

<Application.Resources>

<ResourceDictionary.MergedDictionaries>

</ResourceDictionary.MergedDictionaries>

</ResourceDictionary>

</Application.Resources>

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

vinsibal — Thu, 09 Oct 2008 16:05:25 GMT

Karen,

I'm still not able to repro. Could you just send me your repro app. You can send a zipped solution to vinsibal@microsoft.com. Thanks.

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

prasanna_rao — Wed, 15 Oct 2008 00:49:49 GMT

I am unable to compile the soln.

Error 1 The type reference cannot find a public type named 'DataGridRow'. Line 15 Position 81. C:\Program Files\Microsoft Visual Studio 9.0\Samples\C#Samples\DGridCTP\DataGridCTPSample\DataGridCTPSample\DataGridBasicSample_Demo.xaml 15 81 DataGridCTPSample

I am using VS2008 SP1 with .Net 3.5 SP1

Prasanna

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

vinsibal — Fri, 17 Oct 2008 00:37:00 GMT

Prasanna rao,

Are you correctly referencing WPFToolKit.dll in the csproj? I've seen this error before when I was missing the reference.

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

vinsibal — Mon, 20 Oct 2008 15:32:51 GMT

Carine Maalouf,

I talked about a solution to the issue offline, but I thought I'd post it here just in case anyone else ran into the same issue.

Basically, when you want to override the default themes you can do what Carine has done with the ResourceDictionary. However, DataGrid actually lives in WPFToolKit.dll so will still retain the default theme styles even after setting the merged ResourceDictionary as been set above. To get it to work you will have to merge the WPFToolKit aero.normalcolor.xaml as well.

<ResourceDictionary.MergedDictionaries>

</ResourceDictionary.MergedDictionaries>

Note that you will have to update the uri when the v1 release comes out to use the public key as well as the new version number.

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

Andy Mitchell — Wed, 22 Oct 2008 19:46:03 GMT

Hi Vincent,

I want to change the appearance of a column based on a property on the column configuration I have. So I added a style in my xaml and set the CellStyle on the grid. I then created my own CustomColumn class and added a property called IsReadOnly and set the property in the event handler for AutoGeneratingColumn. This is very similar to the DataGridStylingWithDataTable example that you are using. The IsReadOnly property is never accessed and I just can't understand why.

Any help is much appreciated.

Thanks Andy

Here's the code:-

<Style.Triggers>

</Trigger>

<DataTrigger Binding="{Binding RelativeSource={RelativeSource Self},

Path=(Column).(local:ListEditColumn.IsReadOnly),

Mode=OneWay}"

Value="True">

</DataTrigger>

</Style.Triggers>

</Style>

Private Sub AutoGeneratingColumn(ByVal sender As Object, ByVal e As DataGridAutoGeneratingColumnEventArgs)

Dim lobjColumn As ListEditColumn = New ListEditColumn

lobjColumn.CanUserSort = e.Column.CanUserSort

lobjColumn.Header = e.Column.Header

lobjColumn.DataFieldBinding = TryCast(e.Column, DataGridBoundColumn).DataFieldBinding

If lobjColumn.Header.ToString.Contains("UID") Then

lobjColumn.IsReadOnly = True

lobjColumn.CanUserSort = False

End If

e.Column = lobjColumn

End Sub

Public Class ListEditColumn

Inherits DataGridTextColumn

Private mblnIsReadOnly As Boolean = False

Public Property IsReadOnly() As Boolean

Get

Return mblnIsReadOnly

End Get

Set(ByVal value As Boolean)

mblnIsReadOnly = value

End Set

End Property

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

vinsibal — Thu, 30 Oct 2008 15:15:39 GMT

Andy,

I believe you asked the same question on the codeplex site. I'll put a reference here just in case other people find the same issue, http://www.codeplex.com/wpf/Thread/View.aspx?ThreadId=38292.

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

Cameron Elliot — Mon, 10 Nov 2008 16:58:38 GMT

I can't see from this post how to style a cell from the value of the cell itself. One application of this is in the red/black colouring of positive and negative values.

To do this I would write a style with a DataTrigger which uses a converter to convert a decimal value into a boolean, representing whether the value is positive or negative.

I would like to do the following:

<dg:DataGridTextColumn Header="DecVal1" CellStyle="{StaticResource decimalGridCell}" Binding="{Binding Path=DecVal1, StringFormat='{}{0:N0}'}" />

But I'm a bit stumped when it comes to writing the style. The following would work but would require me to write a style for each decimal column I want to bind to.

<DataTrigger Value="True" Binding="{Binding Path=DecVal1, Converter=myConverter}" etc

How do I specify in the DataTrigger that I want Binding="{Value of the cell}" without having to name a specific property?

(As an aside, I can achieve this by using a DataGridTemplateColumn, using a TextBlock in the DataTemplate, and applying a style which examines the Text property of the TextBlock, converting to decimal, then to a boolean for positive/negative. This seems long-winded and unnecessary to me)

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

vinsibal — Mon, 10 Nov 2008 21:10:46 GMT

Cameron,

Columns do not derive from FrameworkElement and therefore do not play well when it comes to styling.

For your example, you could do the binding on DataGridCell's Content property and deal with it in your converter. It's really all that clean but it's another way you can go.

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

Jacek Sieka — Mon, 24 Nov 2008 13:02:12 GMT

Regarding positive/negative coloring, it would be really nice to have a CellStyleSelector much like the ItemContainerStyleSelector works for each row.

Could you please provide an example of binding the Content property?

re: WPF DataGrid – Styling rows and columns based on Header conditions and other properties

vinsibal — Thu, 18 Dec 2008 22:41:37 GMT

Jacek Sieka,

Which Content property are you talking about?