WPF DataGrid immediate update on Cell Change

Question

5.00/5 (1 vote)

See more:

I would like to have the ViewModel updated immediately on change of value of a cell. Right now have to wait until focus leaves the record. Is there a XAML attribute I can set to cause immediate update?

Posted 18-Jun-12 11:32am

Clifford Nelson

Add a Solution

3 solutions

Solution 3

This works 100%

http://social.msdn.microsoft.com/Forums/en/wpf/thread/a814c74f-6fa0-48f7-a790-8e753da422a8

Posted 26-Oct-12 3:46am

Narendran MR

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

exposed12 · Accepted Answer · 2012-06-18T20:05:00

Solution 1

Try to set the UpdateSourceTrigger property of the Binding to PropertyChanged. The default is LostFocus.

XML

<object UpdateSourceTrigger="UpdateSourceTrigger" .../>

Please refer to msdn for further info:
http://msdn.microsoft.com/en-us/library/system.windows.data.binding.updatesourcetrigger.aspx[^]

Posted 18-Jun-12 20:05pm

exposed12

Comments

Clifford Nelson 19-Jun-12 12:15pm

Thanks, I forgot about that. Could have been clearer on you answer. In this case the default was not lost focus, but the row looses focus. Give you a 5 anyway, especially since you were the only one able to answer the question. In this case the problem is that you restated what Microsoft has on thier site, and Microsoft has some of the worst documentation of anybody. The article you gave as a link is just so very bad. Probably would not have been accepted on CodeProject.

Clifford Nelson · Accepted Answer · 2012-06-19T06:24:00

The best place to see about this problem is http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/c71fe21a-6549-4dcf-aee9-43d02e73194f[^]. Here is some of the code from my solution:

<datagrid>
   <datagrid.resources>
     <style x:key="TextBlockRightAlignStyle" xmlns:x="#unknown">
            TargetType="{x:Type TextBlock}">
       <setter property="TextAlignment">
               Value="Right" />
       <setter property="Padding">
               Value="5,0" />
       <setter property="VerticalAlignment">
               Value="Center" />
     </setter></setter></setter></style>
     <style x:key="TextBoxRightAlignStyle" xmlns:x="#unknown">
            TargetType="{x:Type TextBox}">
       <setter property="TextAlignment">
               Value="Right" />
       <setter property="Background">
               Value="Transparent" />
       <setter property="Padding">
               Value="5,0" />
       <setter property="VerticalAlignment">
               Value="Center" />
     </setter></setter></setter></setter></style>
   </datagrid.resources>
     <datagrid.columns>
     <datagridtextcolumn header="Amount">
           Binding="{Binding Amount, StringFormat={}{0:#\,###},
              UpdateSourceTrigger=LostFocus}"
           ElementStyle="{StaticResource TextBlockRightAlignStyle}"
           EditingElementStyle="{StaticResource TextBoxRightAlignStyle}"
           Width="130" />
   </datagridtextcolumn></datagrid.columns>
 </datagrid>

I included the alignment stuff since somebody may find it useful.