MVC中截取字符串长度

   <%
    int tr=0;
    string AgentName = "b";
        if (Model != null)
       
            foreach (VoucherOrder item in Model)
            {
        %>
        <tr <%if(tr==1){ %>class="tablehtr" <%} %>>
            <td height="28px"> 
            <%
                 if (item.AgentName.Length >4)
                {
                    AgentName = item.AgentName.Substring(0, 4) + "...";
                }
                else
                {
                    AgentName = item.AgentName;
                } 
                %>
                <label id="AgentName" title="<%=item.AgentName %>"><%=AgentName%></label>

            </td>    56574952