Question

尝试从javascript（jquery）调用vb代码中的函数时出现以下错误

在视图（.aspx）中，我有以下代码：

<asp:ImageButton ID="imgbtnRetirar" runat="server" OnClientClick="return alerteliminar();" IdEliminar='<%# Eval("CODIGO") %>'
                                                            ImageUrl="~/Images/ic_eliminar.gif" ToolTip="Borrar al Usuario Aprobador"></asp:ImageButton>

在脚本中我有以下代码：

<script type="text/javascript">
        function alerteliminar() {
        var letra="cancel";
        $("#texto").text("Seguro que desea Eliminar al usuario autorizador?");
        $( "#dialog-message" ).dialog({
          modal: true,
          buttons: {
            "Ok": function() {
              $( this ).dialog( "close" );
               var id = $("#ctl00_ctphFrmContent_grvLista_ctl02_imgbtnRetirar").attr("ideliminar");
                $.ajax(
                {
                    type: "POST",
                    url: "AprobadoresxModificacion.aspx/EliminarRegistro",
                    data: "{'Id':'" + id + "'}",
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    success: function (msg) {
                        console.log(msg)
                    }
                });
            },
            "Cancel": function() {
            $( this ).dialog("Eliminar");
            }
          }
        });
      }
    </script>

在vb代码中，我有以下内容：

<System.Web.Services.WebMethod()> _
    Public Function EliminarRegistro(ByVal Id As Integer) As String
        Try
            If Me.BorrarAprobador(Integer.Parse(Id)) Then
                Me.btnBuscar_Click(Nothing, Nothing)
                Return "OK"
            Else
                Me.Mensaje("No se pudo borrar el registro")
                Return "BAD"
            End If
        Catch ex As Exception
            Return ex.Message
        End Try
    End Function

我得到的错误如下： http://localhost:2091/WebSMEX/Paginas/Mantenimiento/AprobadoresxModificacion.aspx/EliminarRegistro 500（内部服务器错误）

Answer 1

确保VB方法为Shared

Public Shared Function EliminarRegistro(ByVal Id As Integer) As String

另外，请确保您使用WebMethod的类继承System.Web.Services.WebService

Public Class Service1
    Inherits System.Web.Services.WebService
    <System.Web.Services.WebMethod(BufferResponse:=False)> _
    Public Function GetBigData() As DataSet
        'implementation code
    End Function
End Class

Reference

Answer 2

我需要做的是将ASP.Net AJAX ScriptManager添加到页面并将其EnablePageMethods属性设置为true，如下所示

<asp:ScriptManager ID="ScriptManager1" runat="server" AsyncPostBackTimeout="400" EnableScriptGlobalization="True" EnablePageMethods="true">
        </asp:ScriptManager>

从jquery调用asp.net vb函数

2 个答案: