image url Concatenate string

i want to achievet the following Url

ImageUrl='~/products_pictures/(imageId)_middle.jpg

im using gridview and datalist

im trying the follwoing combination but it not working

  <asp:Image ID="Image1"  ImageUrl='~/products_pictures/<开发者_如何学C;%#Eval("Id")%>_middle.jpg' runat="server" /></td>


 <asp:Image ID="Image1"  ImageUrl=<%"~/products_pictures/"%><%#Eval("Id")%><%"_middle.jpg"%> runat="server" />

I would use String.Format for this. It makes concatenation much easier:

<asp:Image ID="Image1" runat="server" ImageUrl='<%# String.Format("~/products_pictures/{0}_middle.jpg", Eval("ID"))%>'

this should work:

</td><asp:Image ID="Image1"  ImageUrl="~/products_pictures/<%#Eval("Id")%>_middle.jpg" runat="server" /></td>

if not debug from this:

</td><%#Eval("Id")%></td>

ells you can try

 <%# ((objectName)Container.DataItem).Id%>
((DataRowView)Container.DataItem)["Id"]

This might work

<asp:Image ID="Image1" runat="server" ImageUrl="~/products_pictures/<%#Eval("id") %>_middle.jpg"/>

If not you can put a asp:Literal, and a HiddenField to store id and in GridView.RowDataBound Event you can add image as a text to the literal

The server tag is not well formed because of the quotes

put single quotes on the outside and try again

ImageUrl='~/products_pictures/<%#Eval("Id")%>_middle.jpg'