Crystal Report 动态数据源未创建报表

Question

我已经在 Google 上搜索过这个主题，并且按照我所看到的进行了编码，但是 CrystalReportViewer 是空的，我没有收到任何错误。我不确定我做错了什么。以下是我所有的代码。

strSQL = "select * from MMM_vw_Rpt_Summary where BudgetID = " & Master.lblBudgetIDText
ds = CreateDataset(strSQL, "cnn_rcg_mmm", "dt_Summary")
CreateSummary(ds)

Public Shared Function CreateDataset(ByVal strSQL As String, ByVal strCNN As String, ByVal strTable As String) As DataSet
    Dim strConnString As String = ConfigurationManager.ConnectionStrings(strCNN).ConnectionString
    Dim da As MySqlDataAdapter
    Dim ds As DataSet
    Dim strReturn As String
    strReturn = ""

    Try
        Using con As New MySqlConnection(strConnString)
            Dim cmd As New MySqlCommand(strSQL, con)
            con.Open()
            da = New MySqlDataAdapter(cmd)
            ds = New dsLifeBudget

            da.Fill(ds, strTable)

            Return ds
            con.Close()
        End Using
    Catch ex As Exception
        strReturn = ex.Message
    End Try
End Function

Protected Sub CreateSummary(ByVal ds As DataSet)
    Dim strReportPath As String = Server.MapPath("~/Reports/LB_Summary.rpt")
    Dim cr As New ReportDocument
    Dim strError As String = ""

    Master.HideMsg()

    'Verify the path to the Crystal Report's .RPT file
    If Not IO.File.Exists(strReportPath) Then
        Throw (New Exception("Unable to locate report file:" & vbCrLf & strReportPath))
        strError = "Unable to locate report file:  " & strReportPath
        Master.txtMsgText = "Error creating Summary - " & strError
        Master.txtMsgVisible(True)
        Exit Sub
    End If

    crLifeBudget.HasDrillUpButton = False
    crLifeBudget.Height = "300px"
    crLifeBudget.Width = "500px"

    'Load the Crystal report's .RPT file and pass in the DataTable
    cr.Load(strReportPath)
    cr.SetDataSource(ds.Tables("dt_Summary"))
    crLifeBudget.ReportSource = cr
    crLifeBudget.RefreshReport()

End Sub

任何帮助将不胜感激！ 埃迪·雷

Answer 1

尝试参考以下，它可以解决问题，因为您的代码缺少crLifeBudget.refresh() 行。

Crystal Reports empty when printed during runtime