[GridGroupExpanderCellElement].Expander.SignSize

[christian]

Hi,

 I try to use a custom image to replace the default arrow icon used to navigate in the hierarchical structure in RadGridView winform control.

No problem to set the image the cellElement does not fit to the image size.
Here's my code :

private void MyGridView_ViewCellFormatting(object sender, Telerik.WinControls.UI.CellFormattingEventArgs e)
       {
           Telerik.WinControls.UI.GridGroupExpanderCellElement cellElement = e.CellElement as Telerik.WinControls.UI.GridGroupExpanderCellElement;


           if (cellElement != null)
           {

               cellElement.Expander.SignSize = new System.Drawing.Size(30, 30);
               cellElement.Expander.SignImage = Properties.Resources.MyCustomImage;
               cellElement.Expander.SignStyle = Telerik.WinControls.UI.SignStyles.Image;
           }


       }

       The cellElement.Expander.SignSize seems to have no effect.

 How can I achieve this please ?

 Thanks.

 

[Dess | Tech Support Engineer, Principal]

Hello Christian,

Thank you for writing.
 
Note that the size of the expander item is controlled by the column's width and the row's height. If the applied image in the ViewCellFormatting event does not fit the available space, you can adjust the RowHeight and GroupIndent properties  of the TableElement in order to achieve the desired look. Here is an example: 

public Form1()
{
    InitializeComponent();
    this.radGridView1.TableElement.GroupIndent = 50;
    this.radGridView1.TableElement.RowHeight = 40;
}

private void radGridView1_ViewCellFormatting(object sender, Telerik.WinControls.UI.CellFormattingEventArgs e)
{
    Telerik.WinControls.UI.GridGroupExpanderCellElement cellElement =
        e.CellElement as Telerik.WinControls.UI.GridGroupExpanderCellElement;

    if (cellElement != null)
    {
        cellElement.Expander.SignImage = Properties.Resources.myimage;
        cellElement.Expander.SignStyle = Telerik.WinControls.UI.SignStyles.Image;
    }
}

I hope this information helps. Should you have further questions I would be glad to help.

 

Regards,
Dess
Telerik

[christian]

Thanks Dess ! It works fine.