Image Url Eval

<asp:Image ID="Image1" runat="server" ImageUrl='<%# "True" .Equals(Convert.ToString(Eval("IsApprovedDocument"))) ? "~/Admin/images/approved.png" : "~/Admin/images/approved.png"%>' />
Error:
DataBinding: '<>f__AnonymousType2`15[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.DateTime, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Nullable`1[[System.
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