asp.net Gridview ImageField alternate Image - asp.net

Question

I have below gridview with an imagefield linked with the UserID number.
How can I do if the picture dosnt exist in the specifield older to get an standard alternate picture?
<ItemTemplate>
<asp:Image ID="MainPic" runat="server"
ImageUrl='<%# GetImageUrl(Eval("PerfilId") as string)%>' />
</ItemTemplate>
..
protected string GetImageUrl(string dbImgURL)
{
if (File.Exists(dbImgURL))
{
return dbImgURL;
}
else
{
return "AdminFotoUser/UserPics/BGP1.png";
}
}

Answer 1

Well you can check the image path in onRowDataBound event of the GridView and change it to a common image if file doesn't exist.
using System.IO;
if (File.Exists(path))
{
Console.WriteLine("file exists");
}
else
//Find Control and Bind it to a common image
OR
You could have re-worked your grid a different way:
- instead of using an Image Field column, you could have used a template column like this:
Code:
<asp:TemplateField>
<ItemTemplate>
<asp:Image runat="server" ID="myImg"
ImageUrl='<%# GetImageUrl(Eval(col2) as string) %>' />
</ItemTemplate>
</asp:TemplateField>
Then in your code behind, you have create a function to return the correct image url:
Code:
Updated Ans
//Send Image name from database (DataGrid) as dbImgURL
protected string GetImageUrl(string dbImgURL)
{
if (File.Exists(dbImgURL))
{
return dbImgURL;
}
else
{
return "Green.gif";
}
}