获取错误：缺少参数值 [英] Getting Error: Missing Parameter Values
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问题描述
我是VB.net中使用Crystal的新手。我有多个参数。其中一些有多个值。我查看了几个网站，提供了有关如何将这些参数从vb.net传递到水晶报表查看器和报表的建议。以下是我的代码。我不确定它有什么不对。
I am new to using Crystal in VB.net. I have multiple parameters. Some of them have multiple values. I have viewed several sites with suggestions on how to pass these parameters from vb.net to the crystal report viewer and the report. Below is my code. I am not sure what is incorrect with it.
Imports System.Data
Imports CrystalDecisions.CrystalReports.Engine
Imports CrystalDecisions.Shared
Imports System.Data.OleDb
Protected Sub cmdRunReport_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdRunReport.Click
Dim dtFromDate As Date
Dim dtToDate As Date
Dim strFromDate As String
Dim strToDate As String
Dim strDateRange As String
Dim rptDoc As New ReportDocument
Dim myPath As String
Dim crUser As String
Dim crPwd As String
Dim crServer As String
Dim crDatabase As String
Dim bAll As String
Dim iCnt As Integer
txtMsg.Visible = False
txtMsg.Text = Nothing
crUser = ConfigurationManager.AppSettings("crUser").ToString
crPwd = ConfigurationManager.AppSettings("crPwd").ToString
crServer = ConfigurationManager.AppSettings("crServer").ToString
crDatabase = ConfigurationManager.AppSettings("crDatabase").ToString
If ddlReport.SelectedValue = -1 Then
txtMsg.Text = "You must select a report to preview"
txtMsg.Visible = True
ddlReport.Focus()
Exit Sub
End If
dtFromDate = Me.calFromDate.SelectedDate.Date
If Not IsDate(dtFromDate) Then
txtMsg.Text = "You must select a from date"
txtMsg.Visible = True
calFromDate.Focus()
Exit Sub
End If
dtToDate = Me.calToDate.SelectedDate.Date
If Not IsDate(dtToDate) Then
txtMsg.Text = "You must select a to date"
txtMsg.Visible = True
calToDate.Focus()
Exit Sub
End If
myPath = Nothing
Select Case ddlReport.SelectedValue
Case "106"
'Load the selected report file
myPath = Server.MapPath("Nav106.rpt")
End Select
Dim paramFields As ParameterFieldDefinitions
Dim paramField1 As ParameterFieldDefinition
Dim paramField2 As ParameterFieldDefinition
Dim paramField3 As ParameterFieldDefinition
Dim paramField4 As ParameterFieldDefinition
Dim paramField5 As ParameterFieldDefinition
Dim paramField6 As ParameterFieldDefinition
Dim paramField7 As ParameterFieldDefinition
Dim DiscreteVal As ParameterDiscreteValue
Dim paramValues As ParameterValues
'Load Report
rptDoc.Load(myPath)
paramFields = rptDoc.DataDefinition.ParameterFields
strDateRange = "From " & dtFromDate.Date & " to " & dtToDate.Date
paramField1 = paramFields.Item("DateRange")
paramValues = paramField1.CurrentValues
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = strDateRange
paramValues.Add(DiscreteVal)
paramField1.ApplyCurrentValues(paramValues)
Dim FromDate As String = Format(dtFromDate, "yyyyMMdd")
strFromDate = FromDate
paramField2 = paramFields.Item("FromDate")
paramValues = paramField2.CurrentValues
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = strFromDate
paramValues.Add(DiscreteVal)
paramField2.ApplyCurrentValues(paramValues)
Dim ToDate As String = Format(dtToDate, "yyyyMMdd")
strToDate = ToDate
paramField3 = paramFields.Item("ToDate")
paramValues = paramField3.CurrentValues
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = strToDate
paramValues.Add(DiscreteVal)
paramField3.ApplyCurrentValues(paramValues)
paramField4 = paramFields.Item("Locs")
paramValues = paramField4.CurrentValues
Select Case ddlReport.SelectedValue
Case 106
bAll = False
iCnt = 0
For Each item As ListItem In lbLocs.Items
If item.Value = -1 Then
If item.Selected Then
bAll = True
End If
Else
If bAll = True Then
If iCnt = 0 Then
iCnt = 1
End If
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = item.Value
paramValues.Add(DiscreteVal)
Else
If item.Selected Then
If iCnt = 0 Then
iCnt = 1
End If
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = item.Value
paramValues.Add(DiscreteVal)
End If
End If
End If
Next
End Select
paramField4.ApplyCurrentValues(paramValues)
paramField5 = paramFields.Item("Agents")
paramValues = paramField5.CurrentValues
Select Case ddlReport.SelectedValue
Case 106
bAll = False
iCnt = 0
For Each item As ListItem In lbAgents.Items
If item.Value.ToString = "-1" Then
If item.Selected Then
bAll = True
End If
Else
If bAll = True Then
If iCnt = 0 Then
iCnt = 1
End If
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = item.Value
paramValues.Add(DiscreteVal)
Else
If item.Selected Then
If iCnt = 0 Then
iCnt = 1
End If
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = item.Value
paramValues.Add(DiscreteVal)
End If
End If
End If
Next
End Select
paramField5.ApplyCurrentValues(paramValues)
paramField6 = paramFields.Item("Status")
paramValues = paramField6.CurrentValues
Select Case ddlReport.SelectedValue
Case 106
bAll = False
iCnt = 0
For Each item As ListItem In lbStatus.Items
If item.Value.ToString = "-1" Then
If item.Selected Then
bAll = True
End If
Else
If bAll = True Then
If iCnt = 0 Then
iCnt = 1
End If
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = item.Value
paramValues.Add(DiscreteVal)
Else
If item.Selected Then
If iCnt = 0 Then
iCnt = 1
End If
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = item.Value
paramValues.Add(DiscreteVal)
End If
End If
End If
Next
End Select
paramField6.ApplyCurrentValues(paramValues)
paramField7 = paramFields.Item("LeadType")
paramValues = paramField7.CurrentValues
Select Case ddlReport.SelectedValue
Case 106
bAll = False
iCnt = 0
For Each item As ListItem In lbLeadType.Items
If item.Value.ToString = "-1" Then
If item.Selected Then
bAll = True
End If
Else
If bAll = True Then
If iCnt = 0 Then
iCnt = 1
End If
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = item.Value
paramValues.Add(DiscreteVal)
Else
If item.Selected Then
If iCnt = 0 Then
iCnt = 1
End If
DiscreteVal = New ParameterDiscreteValue
DiscreteVal.Value = item.Value
paramValues.Add(DiscreteVal)
End If
End If
End If
Next
End Select
paramField7.ApplyCurrentValues(paramValues)
'Set DataBase Login Info
rptDoc.SetDatabaseLogon(crUser, crPwd, crServer, crDatabase)
' Set the Crytal Report Viewer control's source to the report document
crvReports.ReportSource = rptDoc
'Provide Parameter Values
crvReports.EnableParameterPrompt = False
crvReports.DisplayGroupTree = False
crvReports.RefreshReport()
rptValues.Visible = False
rptViewer.Visible = True
End Sub
感谢你的帮助!!
Eddi Rae
Thanks for your help in advance!!
Eddi Rae
推荐答案
我发现了这个问题。我的数据集构建不正确。一旦我重建它，一切正常。
感谢您的回复。
Eddi Rae
I found the issue. I had the dataset built incorrectly. Once I rebuilt it, everything worked properly.
Thanks for your response.
Eddi Rae
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