Question

I want to display image in img control.

Asp code:

<asp:Image id="id" src='<%# Eval("Item.SmallPicPath") %>' Runat="Server" >

C# code:

      public void Page_Load(Object sender, EventArgs e) 
{ 
   Glasses item=GetItemByID(GlassesID)    //retrive record from data base
} 

Glasses is a class that have property SmallPicPath.

I try to display image but i get error any idea how to fix it?

Thank you in advance!

Answer 1

The approach you’re trying to use is based on databinding, which generally isn’t good for a single image.

Instead, try something like this markup:

<asp:Image id="MyImageId" runat="server">

Then, in your code behind:

public void Page_Load(Object sender, EventArgs e) 
{ 
    Glasses item = GetItemByID(GlassesID);    //retrive record from data base
    this.MyImageId.ImageUrl = item.SmallPicPath;
}

If you still want to use databinding for some reason, something like this should work (although there’s a performance cost compared to the other approach):

<asp:Image id="MyImageId" runat="server" ImageUrl="<%# item.SmallPicPath %>">

Code-behind:

public Glasses item;

public void Page_Load(Object sender, EventArgs e) 
{ 
    this.item = GetItemByID(GlassesID);    //retrive record from data base
    this.MyImageId.DataBind();
}

Databinding is an optional operation; you need to call DataBind() on the control (or its parent) to make it happen.

You only need “Eval()” in cases that involve a data container (usually via a DataSource) — which this one doesn’t.