水晶报表主从报表的问题？

[菁菁报表]

我使用下一段代码，没有生成数据，且过一会儿程序没有响应。请大家指教！
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim oRpt As New CrystalReport1
Dim dsdataSet As New Dataset1

Dim CN As New Data.SqlClient.SqlConnection("data source=vol;initial catalog=Northwind;user id=sa;password=123")
CN.Open()

Dim daOrders As New Data.SqlClient.SqlDataAdapter("select customerID,employeeid from orders ", CN)
daOrders.Fill(dsdataSet, "orders")

Dim daDetails As New Data.SqlClient.SqlDataAdapter("select * from [Order Details]", CN)
daDetails.Fill(dsdataSet, "Order Details")

'使用“报表引擎”对象模型将填充的数据集,传递给报表
oRpt.SetDataSource(dsdataSet)
CrystalReportViewer1.ReportSource = oRpt
End Sub

[菁菁报表]

程序执行的好像很缓慢

[菁菁报表]

程序可以运行了，但速度非常慢

[wnlovezxm]

水晶报表就是麻烦！