水晶报表为什么没有刷新数据
水晶报表版本：11.5.0.313
环境：vb.net2005 、SQL 2005，水晶报表

问题：已经向报表文件传递参数，但报表确没有刷新数据。

代码如下：
strRPTFile = GetReportPath( "GL ", "Voucher.rpt ")

For I As Integer = 0 To str.Length - 1
If str(I).IndexOf( "= ") > 0 Then
If str(I).Split( "= ")(0).ToUpper = "Server ".ToUpper Then
srv = str(I).Split( "= ")(1)
End If

If str(I).Split( "= ")(0).ToUpper = "DataBase ".ToUpper Then
db = str(I).Split( "= ")(1)
End If

If str(I).Split( "= ")(0).ToUpper = "Uid ".ToUpper Then
user = str(I).Split( "= ")(1)
End If

If str(I).Split( "= ")(0).ToUpper = "Pwd ".ToUpper Or str(I).Split( "= ")(0).ToUpper = "Password ".ToUpper Then
pwd = str(I).Split( "= ")(1)
End If

End If
Next


Dim ReportDoc As New ReportDocument()
Dim logonInfo As New TableLogOnInfo
Dim table As Table
ReportDoc.Load(strRPTFile)
'设置登录信息
For Each table In ReportDoc.Database.Tables
logonInfo = table.LogOnInfo
With logonInfo.ConnectionInfo
.ServerName = srv
.DatabaseName = db
.UserID = user
.Password = pwd
End With
table.ApplyLogOnInfo(logonInfo)

Next

With ReportDoc

End With

ReportDoc.SetParameterValue( "@Fvoucherid ", strFvoucherid)

With My.Forms.Frm_Report.CrystalReportViewer1
.ReportSource = ReportDoc

.DisplayGroupTree = False

End With
My.Forms.Frm_Report.ShowDialog()

End If

但同样类似的代码处理其他报表又可以。不知是代码有问题还是水晶报表的设置有问题。

[解决办法]
ReportDoc.SetParameterValue( "@Fvoucherid ", strFvoucherid)
ReportDoc.Refresh();//加上这句

With My.Forms.Frm_Report.CrystalReportViewer1
.ReportSource = ReportDoc
.DisplayGroupTree = False

End With