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在會計WPF應用程序中，我們有許多公用DataTable，可在打開選項卡後重新加載數據。這在本地很好，因爲報告只是指這些表格。將數據表更新爲數據集
對於一些更復雜的報告，我們剛剛設置了一個Web服務來運行它們並返回一個PDF ...爲了使它更容易，我想加載這些DataTables轉換成DataSet，然後在服務器端提取它們。這在第一次運行的時候是完美的，但隨後（盡我所能解決這個問題）它會爲後續報告發送不正確的（上次加載的）數據。在本地它仍然可以正常工作，但我們在DataSet中發送的DataTable似乎沒有更新。已嘗試刪除表並重新添加它們，但只是在服務器首次從DataTable中選擇DataRow時拋出「未設置對象引用」。
必須有一些非常基本的，我一直缺少:-(
任何想法？
感謝
Private Async Sub RunProfitAndLossOnServer(sender As Object, e As RoutedEventArgs)
Try
Dim StartDateTB As DateTBx = ReportBalanceSheet_Grid.FindName("BalanceSheet_StartDateTB")
Dim EndDateTB As DateTBx = ReportBalanceSheet_Grid.FindName("BalanceSheet_EndDateTB")
ReportStartDate = StartDateTB.Value
ReportEndDate = EndDateTB.Value
ReportDate = Today
ReportName = "Profit and Loss Report"
PaperLandscape = False
ReportFontSize = 8
PopupModals_ReportGenerator()
If ReportGeneratorRun = True Then
Dim vPDF() As Byte = Nothing
'Determine if the Export Dataset has already been created
If ExportDS Is Nothing Then
ExportDS = New DataSet
VariablesDT = New DataTable
With VariablesDT.Columns
.Add("Current_HOA_Name", GetType(String))
.Add("Current_HOA_ID", GetType(Integer))
.Add("ReportName", GetType(String))
.Add("ReportFontSize", GetType(Integer))
.Add("ReportStartDate", GetType(Date))
.Add("ReportEndDate", GetType(Date))
.Add("User_InternationalDate", GetType(Integer))
.Add("PaperSize", GetType(String))
.Add("PaperLandscape", GetType(Boolean))
.Add("Reports_IsSplitGL", GetType(Boolean))
.Add("Form_ID", GetType(Integer))
End With
With VariablesDT.Rows
.Add(Current_HOA_Name, Current_HOA_ID, ReportName, ReportFontSize, ReportStartDate, ReportEndDate, User_InternationalDate, PaperSize, PaperLandscape, False, Form_ID)
End With
VariablesDT.TableName = "VariablesDT"
ExportDS.Tables.Add(VariablesDT)
ResIncomeDT.TableName = "ResIncomeDT"
ExportDS.Tables.Add(ResIncomeDT)
ResIncNomDT.TableName = "ResIncNomDT"
ExportDS.Tables.Add(ResIncNomDT)
ResExpensesDT.TableName = "ResExpensesDT"
ExportDS.Tables.Add(ResExpensesDT)
ResExpNomDT.TableName = "ResExpNomDT"
ExportDS.Tables.Add(ResExpNomDT)
RevenueDT.TableName = "RevenueDT"
ExportDS.Tables.Add(RevenueDT)
ExpensesDT.TableName = "ExpensesDT"
ExportDS.Tables.Add(ExpensesDT)
RevenueNomDT.TableName = "RevenueNomDT"
ExportDS.Tables.Add(RevenueNomDT)
ExpensesNomDT.TableName = "ExpensesNomDT"
ExportDS.Tables.Add(ExpensesNomDT)
Else
ExportDS.Tables.Remove("ResIncomeDT")
ExportDS.Tables.Remove("ResIncNomDT")
ExportDS.Tables.Remove("ResExpensesDT")
ExportDS.Tables.Remove("ResExpNomDT")
ExportDS.Tables.Remove("RevenueDT")
ExportDS.Tables.Remove("ExpensesDT")
ExportDS.Tables.Remove("RevenueNomDT")
ExportDS.Tables.Remove("ExpensesNomDT")
ExportDS.Tables.Add(ResIncomeDT)
ExportDS.Tables.Add(ResIncNomDT)
ExportDS.Tables.Add(ResExpensesDT)
ExportDS.Tables.Add(ResExpNomDT)
ExportDS.Tables.Add(RevenueDT)
ExportDS.Tables.Add(ExpensesDT)
ExportDS.Tables.Add(RevenueNomDT)
ExportDS.Tables.Add(ExpensesNomDT)
ExportDS.Tables.Remove("VariablesDT")
For Each row As DataRow In VariablesDT.Rows
row("Current_HOA_Name") = Current_HOA_Name
row("current_HOA_ID") = Current_HOA_ID
row("ReportFontSize") = ReportFontSize
row("User_InternationalDate") = User_InternationalDate
row("PaperSize") = PaperSize
row("PaperLandscape") = PaperLandscape
row("Reports_IsSplitGL") = False
row("ReportStartDate") = ReportStartDate
row("ReportEndDate") = ReportEndDate
row("ReportName") = ReportName
row("Form_ID") = Form_ID
Next
ExportDS.Tables.Add(VariablesDT)
End If
Dim vImage As New LoadingImage
LoadingStarted("Uploading to xSoftware... Please wait...", vImage)
Await Task.Run(Sub()
Using vService As New Service5Client
vPDF = vService.ReturnProfitAndLossSheet(ExportDS)
End Using
End Sub)
LoadingCompleted("File uploaded to xSoftware...", "File was uploaded and PDF returned...", vImage)
Dim vFile As String = ByteToFilePath(vPDF)
If System.IO.File.Exists(vFile) Then
Dim P As New Process
With P
.StartInfo.FileName = vFile
.StartInfo.Verb = "Open"
.Start()
End With
Else
AppBoxError("The file path for the PDF is not valid!")
End If
End If
Catch ex As Exception
EmailError(ex)
End Try
End Sub
在服務器端拋出一個錯誤，如果我們刪除和添加的數據表背到數據集
Dim RevenueData() As DataRow = RevenueDT.Select("FormID = " & Form_ID, "Position")
Dim ExpenseData() As DataRow = ExpensesDT.Select("FormID = " & Form_ID, "Position")
Dim RevenueNomData() As DataRow = RevenueNomDT.Select("FormID = " & Form_ID, "Position")
Dim ExpenseNomData() As DataRow = ExpensesNomDT.Select("FormID = " & Form_ID, "Position")