Question about creating filter column

[Matt]

Hi,
I am working on creating custom filtering column for RadGrid, my code is largely based on :
http://demos.telerik.com/aspnet-ajax/controls/examples/integration/gridandcombo/defaultcs.aspx?product=grid

But I would like to have a clear filter button attached to each column, and if the button is clicked it will only clear one column instead of all columns. Here is my overrided function 

protected override void SetupFilterControls(TableCell cell)
{
    base.SetupFilterControls(cell);
    cell.Controls.RemoveAt(0);
    RadComboBox combo = new RadComboBox();
    combo.ID = ("RadComboBox1" + this.UniqueName);
    combo.ShowToggleImage = false;
    //combo.Skin = "Office2007";
    combo.EnableLoadOnDemand = true;
    combo.AutoPostBack = true;
    combo.MarkFirstMatch = true;
    combo.Height = Unit.Pixel(100);
    combo.ItemsRequested += this.list_ItemsRequested;
    combo.SelectedIndexChanged += this.list_SelectedIndexChanged;
    cell.Controls.AddAt(0, combo);

    ImageButton button = new ImageButton();
    button.ImageUrl = "~/images/delete.gif";
    button.Click += this.button_Click;
    button.CssClass = "ClearButton";
    cell.Controls.AddAt(1, button);

    cell.Controls.RemoveAt(2);
}

What should I do inside button_Click handler?

TIA

[Princy]

Hello Matt,

You can try the following code snippet.
C#:

protected void RadGrid1_ItemCreated(object sender, Telerik.Web.UI.GridItemEventArgs e)

{

 if (e.Item is GridFilteringItem)

 {
 GridFilteringItem dataItem = (GridFilteringItem)e.Item;


 foreach (GridColumn col in RadGrid1.MasterTableView.RenderColumns)

 {

  Button btn1 = new Button();

  dataItem[col.UniqueName].Controls.Add(btn1);

  btn1.Text = "Clear";

  btn1.Click+=new EventHandler(btn1_Click);

 }

 }

}

void  btn1_Click(object sender, EventArgs e)

{

 GridFilteringItem itm = (GridFilteringItem)RadGrid1.MasterTableView.GetItems(GridItemType.FilteringItem)[0];

 foreach (GridColumn col in RadGrid1.MasterTableView.RenderColumns)

 {

  if (col is GridBoundColumn)

  {

  TextBox txt = itm[col.UniqueName].Controls[0] as TextBox;

  if (txt.Text !=  string.Empty)

   {

   txt.Text = "";

   }

  }

 }

 foreach (GridColumn column in RadGrid1.MasterTableView.Columns)

 {

  column.CurrentFilterFunction = GridKnownFunction.NoFilter;

  column.CurrentFilterValue = string.Empty;

 }

 RadGrid1.MasterTableView.FilterExpression = string.Empty;

 RadGrid1.MasterTableView.Rebind();

}

Thanks,
Princy.