VB+SQL的ListView1不报错，不显示数据

Private Sub ChooseCourse_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Dim sel1 As String = "select C#,CNAME,CLASSH from C "
    sel1 = sel1 & "where C# in(select C# from SC "
    sel1 = sel1 & "where S# = ' " & Login.xuehao & "')"
    Dim com1 As New SqlCommand(sel1, conn)
    conn.Open()
    Dim sreader1 As SqlDataReader = com1.ExecuteReader()
    Dim item As ListViewItem

    Dim subitem1, subitem2 As ListViewItem.ListViewSubItem
    Do While sreader1.Read()
        item = New ListViewItem(sreader1(0).ToString)
        subitem1 = New ListViewItem.ListViewSubItem(item, sreader1(1))
        item.SubItems.Add(subitem1)
        subitem2 = New ListViewItem.ListViewSubItem(item, sreader1(2))
        item.SubItems.Add(subitem2)
        ListView1.Items.Add(item)
    Loop
    sreader1.Close()
    conn.Close()
End Sub

    这是仿照课程信息查询做的，课程信息查询那个窗口显示正常。且SC，C表中有数据，放在SQL查询把Login.xuehao（这个在其他窗口调用正常）换为对应的学号能输出结果。
    ![图片说明](https://img-ask.csdn.net/upload/201512/30/1451446723_627030.jpg)

![图片说明](https://img-ask.csdn.net/upload/201512/30/1451446746_565902.jpg)

![图片说明](https://img-ask.csdn.net/upload/201512/30/1451446754_941198.jpg)

![图片说明](https://img-ask.csdn.net/upload/201512/30/1451446765_962789.jpg)

先把where条件去掉看看。估计是你数据库没有符合条件的记录，或者你的查询写错了。
字段中不要用#等特殊符号。