how write filtering for templatecolumns

[Peyman]

hi dear telerik admin : 
i have two GridTemplateColumn in my RadGrid That Regular filtering on them has error and it seems we should change them! 
those GridTemplateColumns are like below : 

<telerik:GridTemplateColumn FilterControlAltText="Filter Online column" HeaderText="Online"
    UniqueName="Online">
    <ItemTemplate>
        <asp:CheckBox ID="chkOnline" runat="server" Checked='<%# CheckForOnline(Eval("ID")) %>'
            Enabled="False" />
    </ItemTemplate>
    <HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle" />
    <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="100px" />
</telerik:GridTemplateColumn>

and the other one :

<telerik:GridTemplateColumn FilterControlAltText="Filter FileSize column" HeaderText="FileSize"
    UniqueName="FileSize" Visible="False">
    <ItemTemplate>
        <asp:Label ID="lblFileSize" runat="server" Text='<%# Eval("FileSize") %>'></asp:Label>
    </ItemTemplate>
    <HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle" />
    <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" />
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn FilterControlAltText="Filter FileSizeChange column" HeaderText="FileSize"
    UniqueName="FileSizeChange">
    <ItemTemplate>
        <asp:Label ID="lblFileSizeChange" runat="server" Text='<%# ChangeFileSize(Eval("FileSize")) %>'></asp:Label>
    </ItemTemplate>
    <HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle" />
    <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" />
</telerik:GridTemplateColumn>

as you seeFileSize TemplateColumn is disable and i am using FileSizeChange instead! 
FileSize string is like (213435) -> this number shows us bytes!
and FileSizeChange is like (231 MB)!
how can i write filtering for both Online and FileSizeChange ? 

thanks in advance

[Princy]

Hello Peyman,

You can take a look into the following documentation.
Implementing Filtering for Template/Custom Columns

Thanks,
Princy.

[Peyman]

dear princy hi,
i checked that link , but still have problems!
my first TemplateColumn has a checkBox inside that gets it's checked from code behind.
so i can not introduce this TemplateColumn DataField="Online" like that documentation.
so what can i do about that filtering?
it's c# code is like this : 

protected bool CheckForOnline(object User_ID)
{
    bool Situation;
    DataSet dsOnlineUsers = DataLayer.OnlineUsers.SelectRow_By_UserID_Latest(int.Parse(User_ID.ToString()));

    if (dsOnlineUsers.Tables["OnlineUsers"].Rows.Count > 0)
    {
        DataRow drOnlineUsers = dsOnlineUsers.Tables["OnlineUsers"].Rows[0];

        Situation = (bool)drOnlineUsers["Online"];
    }
    else
    {
        Situation = false;
    }
    return Situation;
}

and let me some explain about TemplateColumn  #2 (FileSizeChange)
this column uses FileSize TemplateColumn for filling itself.
i do n't want regular FileSize TemplateColumn So I diabled it!
and FileSizeChange  TemplateColumn codes are like below :

protected string ChangeFileSize(object FileSize)

{

    string FileSize_ = ConvertBytes.ToFileSize(long.Parse(FileSize.ToString()));//Returns Something Like 234 MB


    return FileSize_;

}

so New FileSize Have A different format and we can't introduce it's column DataField="FileSize"
would you plz learn me how can write filtering for these two TemplateColumn ?
would be appreciate for help!
best regards

[Pavlina]

Hello Peyman,

For more information on this, please refer to the following code library submission. You can alter the logic according to your requirement:
http://www.telerik.com/community/code-library/aspnet-ajax/grid/individual-filtering-and-sorting-for-quot-sub-columns-quot-in-template-column.aspx

Regards,
Pavlina
the Telerik team

[Peyman]

thanks for answer,
but in those examples we do n't have any check box for filtering.
besides i want to use regular telerik filtering items in filtering drop down.
would you please give me some codes about my situations?

would be appreciate for help

[Pavlina]

Hello Peyman,

Please refer to the Multi-Selection RadComboBox for filtering grid code library which shows how you could use Multi-Selection RadComboBox (with checkboxes in ItemTemplate) in the FilterTemplate of RadGrid.

All the best,
Pavlina
the Telerik team