asp.net c# : eval function when boolean value is empty

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I need to know how to check a Boolean value that is empty ( table with no data row).

my code:

<itemtemplate>
    <asp:Image ImageUrl=<%# GetCheckMark((bool)Eval("CanInsert")) %> ID="ImgCanInsert" runat="server" />
</itemtemplate>

when table is empty this function raise error. In code behind I check for true and false and change image url. So how can I check before eval() to know if it is empty I have tried this but no way:

ImageUrl=<%# Eval("CanSee") == null?"0": GetCheckMark(Eval("CanInsert")) %>

Please help me.

Posted 20-Apr-12 23:12pm

A.Ebrahimi

Updated 20-Apr-12 23:27pm

sravani.v

v3

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A.Ebrahimi · Accepted Answer · 2012-04-20T23:34:00

I have change it in this way and now it is running:

ASP.NET

<itemtemplate>
    <asp:image imageurl="<%# String.IsNullOrEmpty(Eval("CanInsert").ToString()) ? "-" : GetCheckMark(Eval("CanInsert").ToString())%>" id="ImgCanInsert" runat="server" xmlns:asp="#unknown" />
</itemtemplate>

also code behind:

C#

protected string GetCheckMark(string checkd)
{
    return checkd == "True" ? "../../../../../ServerFile/Icons/Editor/True.png" : "../../../../../ServerFile/Icons/Editor/False.png";
}

Thanks all