Change image button in click event in Datagrid

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Hello,
I am designing wpf application. In my application I have a "Parent-Child" data grid and I have a expand button in each row. when I click that button the child grid expands and at that time I want to change the image of the button ie "Collapse" symbol. Please let me know how to change the image of a button in its click event. Please see my xaml code

XML

<DataGridTemplateColumn Header="C" >
      <DataGridTemplateColumn.CellTemplate>
              <DataTemplate>
                   <StackPanel Name="stk">
                      <Button x:Name="btnCollapse"  ToolTip="Expand" Foreground="Black"  Click="btnCollapse_Click"  >
                      <Image Source="../images/Plus.png" Cursor="Hand"  Height="20" Width="15"  Name="imgExpandGrid" ></Image>
                      </Button>
                   </StackPanel>
              </DataTemplate>
         </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

Posted 24-Nov-13 20:38pm

jing567

Updated 24-Nov-13 20:41pm

v2

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Mycroft Holmes · Answer 1 · 2013-11-24T21:32:00

You are only attempting to do half the job, you can change the image but the tooltip will still read Expand, presumably your click even handles the different states.

You have 2 choices, build 2 buttons with the different functionality and manage the Visible attribute. Or bind the tooltip and image attributes to the data collection, allowing the change event to trigger the data change.

I'm reasonably sure there are some intricate XAML method of doing this which someone may be able to point out. Also the control itself may have an expand/collapse event you can hook into to control the content.