Checkbox in silverlight DataGrid behaving strangely

Question

I am using checkbox in an itemtemplate column in a Silverlight 5 DataGrid. I am facing a strange problem with it. When I select more than

Answer 1

I fixed this problem in my code. I did handling within the LoadingRow and UnloadingRow events of the grid. As soon as a row is loaded, we need to look for the condition on the basis of which we want to keep the check-box checked or unchecked. But as soon as you set the IsChecked property, Checked or UnChecked event of the check-box will get fired. In this scenario we can unregister the Checked and UnChecked events of the check-box if we have any, set the IsChecked property. After setting this, again register the events.

Below is the code for your help.

Add LoadingRow and UnloadingRow events to your grid.

... LoadingRow="DGUserList_RowLoadUnload" UnloadingRow="DGUserList_RowLoadUnload">

In your code behind file:

    private void DGUserList_RowLoadUnload(object sender, DataGridRowEventArgs e)
    {
        DataGridRow row = e.Row;
        CheckBox cbox = (CheckBox)this.dgUserList.Columns[0].GetCellContent(row);
        this.UpdateHookedEventsForCheckBox(cbox, false);
        cbox.IsChecked = true; // Here put your condition for check/uncheck
        this.UpdateHookedEventsForCheckBox(cbox, true);
    }

    private void UpdateHookedEventsForCheckBox(CheckBox chkBox, bool register)
    {
        if (register)
        {
            chkBox.Checked += this.CheckBox_Checked;
            chkBox.Unchecked += this.CheckBox_Unchecked;
        }
        else
        {
            chkBox.Checked -= this.CheckBox_Checked;
            chkBox.Unchecked -= this.CheckBox_Unchecked;
        }
    }

This way I need not bother about putting some hake code in my Checked and UnChecked events.