使用web方法获取数据时，jQuery响应失败

我实现了一个web方法来获取单个记录。。web方法工作正常，但不可用。jQuery AJAX中未显示的数据

jQuery和Ajax代码

function GetBillDetail() {
                debugger;
                var ClientId = jQuery('#<%=HiddenFieldCompanyId.ClientID%>').val()
                $.ajax({
                    type: "POST",
                    url: "<%=mstr_WebsitePath%>webservice/ClientSearch.asmx/GetBillDetaill",
                    data: '{ClientId: "' + ClientId + '" }',
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    success: function (r) {// Data Not Getting Here
                        debugger;
                        var billReport = r.d;
                            jQuery('#ClientName').html(billReport.ClientName);
                            jQuery('#CityName').html(billReport.City);
                            jQuery('#ClientAddress').html(billReport.Address);
                            jQuery('#ClientPhoneNo').html(billReport.PhoneNo);
                    },
                    failure: function (r) {
                        alert(r.d);
                    }
                });
            }

BOL调用DAL方法

Public Shared Function GetBillCorrectionDetailDAL(ByVal mstr_ClientId As String) As DataSet
        Try
            _ILog.WriteToLog("", Severity.Information, "BillingDetailDAL.vb", "GetBillCorrectionDetailDAL", "Get Client Detail", Level.INFO)
            Dim commandparameters() As SqlParameter = New SqlParameter(0) {}
            commandparameters(0) = New SqlParameter("@ClientId", mstr_ClientId)

            Return SqlHelper.ExecuteDataset(Utilities.WebConfiguration.SQLConnectionString, CommandType.StoredProcedure, "GC_GetCompanyDetail", commandparameters)
        Catch piEx As PIException
            _ILog.LogException("", Severity.ProcessingError, "BillingDetailDAL.vb", "GetBillCorrectionDetailDAL", piEx)
            Throw piEx
        Catch ex As Exception
            _ILog.LogException("", Severity.ProcessingError, "BillingDetailDAL.vb", "GetBillCorrectionDetailDAL", ex)
            Throw ex
        End Try
    End Function

我没有在

success:function（r）

上获取数据。任何人都知道如何解决此问题

您的

WebMethod

应该是

static

，对于VB.Net，应该是

共享

---

尝试以json格式字符串返回数据

---

将列表数据序列化为json，并将函数的返回类型更改为字符串。

Hello@Sumit，我已经将序列化

Dim js用作新的JavaScriptSerializer（）Context.Response.Write（js.Serialize（billReportList））

但它不起作用，因为游标转到故障部分“故障：函数（r）{alert（r.d）”}`您在警报中收到了任何特定错误？函数返回了多少条记录？没有收到任何特定错误。它在弹出框failure:function（jqXHR，textStatus，ErrorSprown）中给了我

错误

{}请尝试此函数语法检查失败并检查这三个变量的值。Hello@Mairaj，我正在使用您的代码，但它给了我500个错误。。无法工作您可以查看您的浏览器控制台>

Public Shared Function getBillCorrectionDetailBOL(ByVal ClientId As String) As DataTable
        Try
            _ILog.WriteToLog("", Severity.Information, "BillingDetailBOL.vb", "getBillCorrectionDetailBOL", "Get Client bill Detail", Level.INFO)
            Dim mobj_dset As New DataSet

            Return BillingDetailDAL.GetBillCorrectionDetailDAL(ClientId).Tables(0)
        Catch piEx As PIException
            _ILog.LogException("", Severity.ProcessingError, "BillingDetailBOL.vb", "getBillCorrectionDetailBOL", piEx)
            Throw piEx
        Catch ex As Exception
            _ILog.LogException("", Severity.ProcessingError, "BillingDetailBOL.vb", "getBillCorrectionDetailBOL", ex)
            Throw ex
        End Try
    End Function

Public Shared Function GetBillCorrectionDetailDAL(ByVal mstr_ClientId As String) As DataSet
        Try
            _ILog.WriteToLog("", Severity.Information, "BillingDetailDAL.vb", "GetBillCorrectionDetailDAL", "Get Client Detail", Level.INFO)
            Dim commandparameters() As SqlParameter = New SqlParameter(0) {}
            commandparameters(0) = New SqlParameter("@ClientId", mstr_ClientId)

            Return SqlHelper.ExecuteDataset(Utilities.WebConfiguration.SQLConnectionString, CommandType.StoredProcedure, "GC_GetCompanyDetail", commandparameters)
        Catch piEx As PIException
            _ILog.LogException("", Severity.ProcessingError, "BillingDetailDAL.vb", "GetBillCorrectionDetailDAL", piEx)
            Throw piEx
        Catch ex As Exception
            _ILog.LogException("", Severity.ProcessingError, "BillingDetailDAL.vb", "GetBillCorrectionDetailDAL", ex)
            Throw ex
        End Try
    End Function

Public Shared Function GetBillDetaill(ByVal ClientId As String) As List(Of BillReport)