vb.net中的NullReferenceException [英] NullReferenceException in vb.net

问题描述

我在运行此代码时遇到了一些问题。



你能否解决 NullReferenceException <的运行时错误/ code>在下面生成的代码中





Hi I''m having some problem when running this code.

Can you please solve the run time error of "NullReferenceException" in following code which was generated

Try
            NowTime = DateTime.Now
If IsValidShutdown Then
                tblRawTesterShutdown = objDAL.GetRawTesterShutdown(StartTime, NowTime)
asdasdIf tblRawTesterShutdown.Rows.Count > 0 Then
                    For Each RowItem As DataRow In tblRawTesterShutdown.Rows
                        objShutdownReport = New ShutdownReportENT
                        With objShutdownReport
                            .ShutdownType = _ShutdownType
                            .TesterID = LineNo                          
                            .E_Code = RowItem.Item("E_FIELD").ToString.Trim
                            .F_Code = RowItem.Item("F_FIELD").ToString.Trim
                            .G_Code = RowItem.Item("G_FIELD").ToString.Trim
                            .Status = RowItem.Item("HSA_STATUS").ToString.Trim
                            .Family = RowItem.Item("FAMILY").ToString.Trim
                            .Count = CInt(RowItem.Item("COUNTOFLINENO"))
                            .StartTime = StartTime
                            .Timestamp = NowTime                           
                            .CACHE_FAMILY = RowItem.Item("CACHE_FAMILY").ToString.Trim                           
                            If Family = Nothing Then
                                Family = "'" & .Family & "'"
                            Else
                                If Family.IndexOf(.Family) = -1 Then
                                    Family = Family & ",'" & .Family & "'"
                                End If
                            End If
                        End With

                        objDAL.InsertShutdownReport(objShutdownReport)
                    Next
                Else
                    Return False
        End If
 Catch ex As Exception
            Throw New Exception("Shutdown: " & ex.Message)
        Finally
        End Try
        Return False

推荐答案

要解决此问题，请按照以下链接的说明操作： System.NullReferenceException - 对象引用未设置为实例一个东西。 VB.Net中的3个常见原因。 [ ^ ]

To solve this issue, please, follow the instructions with this link: System.NullReferenceException – Object reference not set to an instance of an object. 3 common causes in VB.Net.[^]

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