運行的時候,瀏覽器它提示WebService未定義,WebService為定義好的web服務類.頁面前端代碼為: <asp:ScriptManager ID="ScriptManager1" runat="server">        </asp:ScriptManager>        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>        <input id="Button1" type="button" value="button" onclick="callWebService()" />后端代碼為: StringBuilder sb = new StringBuilder();            sb.Append("function callWebService(){\n");            sb.Append("WebService.ReturnServerTime('yyyy-MM-dd mm:ss',onOk);\n");            sb.Append("}\n");            sb.Append("function onOk(returnData){\n");            sb.Append("$('TextBox1').value=returnData;\n");            sb.Append("}\n");            this.ClientScript.RegisterClientScriptBlock(this.GetType(), "abc", sb.ToString(), true);            this.ScriptManager1.Services.Add(new ServiceReference("WebService.asmx"));