The default filter function changes to 'No Filter' on second filtration for RadGrid Column

[Smruti Ranjan]

I have a RadGrid in my page.

For a particular string type column i had set the default filter function as "Contains".

On first page load i found that it appears as "Contains" in the Filter menu.
But if lets say, i filter any other column with any filter criteria and again come back to this column and open the filter menu the default filter function now automatically changed to "No Filter".

Many work arrounds i had tried but is not working for me, cant even found the exact cause for it.

Can any body help me in this regard ? I want to know why it happens like this and what may be the fixes for this ?

Thanks in advance. :)

[Shinu]

Hello Smruthi,

The default behavor for the grid is not to persist the CurrentFilterFunction on postback for columns that do not have value entered in the filter. You can try manually saving this setting. One approach is to set the CurrentFilterFunction property in the Page_PreRender event for the page. Here is the sample code.
aspx:

<telerik:GridBoundColumn DataField="FirstName"  CurrentFilterFunction="Contains"   UniqueName="FirstName" >
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="EmployeeID"  UniqueName="EmployeeID" >
</telerik:GridBoundColumn>

C#:

protected override void OnPreRender(EventArgs e)
{
    base.OnPreRender(e);
    grid1.Columns[0].CurrentFilterFunction = GridKnownFunction.Contains;
    grid1.Rebind();
}

Thanks,
Shinu.