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Editorial Team
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Asked: 2026-06-09T19:21:17+00:00

Why does the second line work but not the first one? I get the

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Why does the second line work but not the first one?
I get the “The server tag is not well formed”.
And the Guid I’ve copy into the second line is directly from the database. 

< asp:Image runat="server" ImageUrl="~/Images/Avatar/Avatar.aspx?UserId=<%#DataBinder.Eval(Container.DataItem, "UserId")%>" />

< asp:Image runat="server" ImageUrl="~/Images/Avatar/Avatar.aspx?UserId=22AA736E-BD1B-4623-8E76-4769051F2E60" />
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1 Answer

  1. Editorial Team

    Or try

    < asp:Image runat="server" ImageUrl='<%#"~/Images/Avatar/Avatar.aspx?UserId=" + DataBinder.Eval(Container.DataItem, "UserId")%>' />

    Your problem was the double quotes. Your opening quote was a double quote so was being closed by the opening quote on “UserID”.
    You should also always use single quotes when databinding anyway.

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