Filtering: Type 'Pair' to type 'String'

[Chanan Zass]

Greetings,

We have a RadGrid with filtering enabled; the page is ajaxified and includes a RadWindowManager as well.
We've been using filtering for a while now with no problem. However, here the filtering fails with an error message:

Error: Sys.WebForms.PageRequestManagerServerErrorException: Conversion from type 'Pair' to type 'String' is not valid.

Anyone has encountered this kind of error message?
The only difference from other RadGrids where filtering works without a problem is the RadWindowManagers. Is there a conflict we're not aware of?

Thanks in advance.

[Vasil]

Hello Chanan Zass,

Could you share the whole page with us? Because I am unable to replicate the issue with the provided information only.

Kind regards,
Vasil
the Telerik team

[Kori]

Chanan,

CommandArgument is an object, you're likely assuming it's usually a string. When filtering, we find that it's not what we're usually expecting and we get the type "Pair" (no idea where it comes from).

A little error checking, and you should be able to bypass the issue.

-- Kori

[Jayesh Goyani]

Hello,

((Pair)e.CommandArgument).First == "NoFilter" // type of filter like.. contains,equal to,greater then
((Pair)e.CommandArgument).Second == "OrderDate"  // Column Unique name

for more info please check below link.
http://www.telerik.com/help/aspnet/grid/grdfilteringfordatetimecolumnwithdataformatstring.html

let me know if any concern.

Thanks,
Jayesh Goyani

[Chanan Zass]

Thanks, guys.

The reported error was due to our RadGrid1_ItemCommand, where we coded a procedure to generate PDF documents.
We ignored the possible filter command.
So when we wrote

Dim myCommandArgument As String = e.CommandArgument

We got the conversion error (from Pair to String).
This is our current code snippet:

Protected Sub RadGrid1_ItemCommand(ByVal sender As Object, ByVal e As GridCommandEventArgs) Handles RadGrid1.ItemCommand
        Dim myCommandArgument As String
        Dim strError As String = ""
        If e.CommandName = "CreatePdf" Then
            myCommandArgument = e.CommandArgument

            If myCommandArgument.ToString.Length > 0 Then
                strError = CreatePDF(myCommandArgument)
                If strError.Length > 0 Then
                    RadGrid1.Controls.Add(New LiteralControl("<font color='red'>Could not create the PDF file.<br />The server returned the following error: <br />" & strError & "</font>"))
                    Exit Sub
                End If
            Else
                RadGrid1.Controls.Add(New LiteralControl("<font color='red'>Could not create PDF document as no document identifiers have been provided." & "</font>"))
            End If
        End If
    End Sub