GridView中字符串太长处理方式

<asp:TemplateField HeaderText="子机构编号">
                    <ItemTemplate>
                        <asp:Label ID="Label1" runat="server" Text='<%#Eval("Org_ChildId").ToString().Length>8?Eval("Org_ChildId").ToString().Substring(0,8)+"...":Eval("Org_ChildId").ToString()%>'></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Org_ChildId") %>'></asp:TextBox>
                    </EditItemTemplate>
                </asp:TemplateField>