How to bind data in WPF DataGrid in code?

Question

I have following code in an extended DataGrid to check or uncheck the CheckBoxColumn:

            if (this.Columns[c] is DataGridCheckBoxColumn)
            {
                CheckBox cb = this.GetCellCtrl<CheckBox>(this.Columns[fromCol], topRow);
                for (int r = fromRow + 1; r <= toRow; r++)
                {
                    CheckBox tt = this.GetCellCtrl<CheckBox>(this.Columns[fromCol], this.GetRow(r));
                    if (tt != null)
                        tt.IsChecked = cb.IsChecked;
                }
            }

The problem is that the checkboxes are checked (or unchecked), but the underlying data are not updated. If I mouse-clicking the checkbox, it works. So, what's the difference between my code and mouse-clicking? How to solve my problem?

ColinE · Accepted Answer · 2011-06-25 05:53:59Z

1

Setting a value locally will remove the binding that couples your CheckBox to your data. Is there any reason why you are updating the state of your data via the UI? Why not use your same loop logic on the data?

If you really must do it this way, you should look into UI Automation:

http://msdn.microsoft.com/en-us/library/ms747327.aspx

answered Jun 25, 2011 at 5:53

ColinE

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2 Comments

newman Over a year ago

Thank you very much for your response. I'm not looking for UI Automation. I'm just trying to create a generic function to make the selected cells checkable independent of underlying data source - if it's a DataGridCheckBoxColum, the binding data must be bool type. I practically try to simulate a mouse click of the CheckBoxes. From my testing, the binding doesn't seem to be decoupled, because I could still click it and the underlying data reflects the change.

newman Over a year ago

You said "Setting a value locally will remove the binding" - How does this work? How can I restablish the binding?

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