Set CustomFilterColumn CurrentFilterFunction

[Josh]

Below is code that I have for my custom filter column.  Everything works great, however, if I select
"All" from the radcombobox I get "No records to display."  I am not sure if it is set up correctly to
either remove the the currentfilterfunction and value or how I set the column to no NoFilter when
"All" is chosen.  Any ideas?  Below is the code.  Thanks is advance.

Joshua

public class MyCustomFilteringColumn : GridBoundColumn
{

    //RadGrid will call this method when it initializes the controls inside the filtering item cells
    protected override void SetupFilterControls(TableCell cell)
    {
        base.SetupFilterControls(cell);
        cell.Controls.RemoveAt(0);
        Telerik.Web.UI.RadComboBox combo = new Telerik.Web.UI.RadComboBox();
        combo.ID = ("RadComboBox1" + this.UniqueName);
        combo.ShowToggleImage = false;
        combo.Skin = "Office2007";// "Web20";
        combo.EnableLoadOnDemand = true;
        combo.AutoPostBack = true;
        combo.MarkFirstMatch = true;
        combo.Height = Unit.Pixel(100);
        combo.Width = Unit.Pixel(60);
        combo.ItemsRequested += this.list_ItemsRequested;
        combo.SelectedIndexChanged += this.list_SelectedIndexChanged;
        cell.Controls.AddAt(0, combo);
        cell.Controls.RemoveAt(1);
    }

    //RadGrid will cal this method when the value should be set to the filtering input control(s)
    protected override void SetCurrentFilterValueToControl(TableCell cell)
    {

        base.SetCurrentFilterValueToControl(cell);
        RadComboBox combo = (RadComboBox)cell.Controls[0];

        if ((this.CurrentFilterValue != string.Empty))
        {
            combo.Text = this.CurrentFilterValue;
        }
    }

    //RadGrid will call this method when the filtering value should be extracted from the filtering input control(s)
    protected override string GetCurrentFilterValueFromControl(TableCell cell)
    {
        RadComboBox combo = (RadComboBox)cell.Controls[0];
        return combo.Text;
    }

    private void list_ItemsRequested(object o, RadComboBoxItemsRequestedEventArgs e)
    {
        ((RadComboBox)o).DataTextField = this.DataField;
        ((RadComboBox)o).DataValueField = this.DataField;
        ((RadComboBox)o).DataSourceID = Global.GridDS;
        ((RadComboBox)o).DataBind();
        ((RadComboBox)o).Items.Insert(0, new RadComboBoxItem("All", ""));
    }

    private void list_SelectedIndexChanged(object o, RadComboBoxSelectedIndexChangedEventArgs e)
    {
        GridFilteringItem filterItem = (GridFilteringItem)((RadComboBox)o).NamingContainer;

        if ((this.UniqueName == "Index"))
        {
            //this is filtering for integer column type
            filterItem.FireCommandEvent("Filter", new Pair("EqualTo", this.UniqueName));
        }
        //filtering for string column type
        filterItem.FireCommandEvent("Filter", new Pair("Contains", this.UniqueName));
    }
}

[Josh]

I was able to figure it out.  I changed

((RadComboBox)o).Items.Insert(0, new RadComboBoxItem("All", ""));

to

((RadComboBox)o).Items.Insert(0, new RadComboBoxItem("All", "All"));

and

        if ((this.UniqueName == "Index"))
        {
            //this is filtering for integer column type
            filterItem.FireCommandEvent("Filter", new Pair("EqualTo", this.UniqueName));
        }
        //filtering for string column type
        filterItem.FireCommandEvent("Filter", new Pair("Contains", this.UniqueName));

to

//Since I only filter on strings
if(((RadComboBox)o).SelectedValue != "All")
            filterItem.FireCommandEvent("Filter", new Pair("Contains", this.UniqueName));
//Since I do not have any values that will ever equal to "All"
        if (((RadComboBox)o).SelectedValue  == "All")
            filterItem.FireCommandEvent("Filter", new Pair("NotEqualTo", this.UniqueName));

Hope this helps.
Joshua