using If statement in Bind/Eval

Compiler Error Message: CS0131: The left-hand side of an assignment must be a variable, property or indexer

<asp:ListView ID="lsvmain" runat="server">
      <ItemTemplate>
          <div class="span8">
              <h5>
                  <asp:Image ID="uimg" runat="server" CssClass="img-polaroid" Width="44px" ImageUrl='<%# Eval("imgsrc") %>' />
                  <asp:Label ID="lblTitle" runat="server" Text='<%# Eval("Title") %>'></asp:Label>
              </h5>
          </div>
          <div class="span4">
              <asp:Label ID="Label1" runat="server" Text='<%# Eval("StReply") = true ? "yes" : "no" %>'></asp:Label>
          </div>

          <hr />
      </ItemTemplate>
  </asp:ListView>