sql - 水晶报表和sql命令

Question

我在水晶报表中显示连接表的数据内容时遇到问题，我的 sql 查询很好，它显示了我自己的数据，但是当我填充水晶报表数据源并显示水晶重复副本和更多数据时，我的代码是：

   Dim rep As CrystalReport1 = New CrystalReport1()
    Dim objcon = New SqlConnection("data source=(local);initial catalog=hesabres;user id='sa';password='Maysam7026'")
    Dim objcom = New SqlCommand
    Dim objdata As New DataTable
    Dim objdr As SqlDataReader
    objcom.CommandText = " SELECT customer.customer_name, customer.customer_tel, orders.order_stuff_name, orders.order_number" & _
" FROM   hesabres.dbo.orders orders inner JOIN hesabres.dbo.customer customer ON orders.order_customer_id=customer.customer_id"

    objcom.Connection = objcon
    objcon.Open()
    objdr = objcom.ExecuteReader
    objdata.Load(objdr)
    rep.SetDataSource(objdata)
    CrystalReportViewer1.ReportSource = rep

Answer 1

尝试更改这 2 行的顺序：

rep.SetDataSource(objdata)
CrystalReportViewer1.ReportSource = rep

至：

CrystalReportViewer1.ReportSource = rep
rep.SetDataSource(objdata)