各位高手看看我的问题吧,纠结
在调用“Fill”前，SelectCommand 属性尚未初始化
Public Function ds(ByVal str As String) As DataSet
  Dim myConn As SqlConnection
  Dim myComm As SqlCommand
  'Dim myDataread As SqlDataReader
  Dim myds As DataSet = New DataSet()
  Dim myds2 As SqlDataAdapter = New SqlDataAdapter()
  Dim datasource As String
  datasource = "DATA SOURCE=(local);UID=sa;PWD=7682;DATABASE=JickLiClass"
  myConn = New SqlConnection(datasource)
  myConn.Open()
  myComm = New SqlCommand(str, myConn)
  myds2.Fill(myds, "student")
  Return myds
  myConn.Close()
  End Function

End Class
这是我的代码,然后我在下面应用时候的代码如下:
Dim class2 As New Class1
  Dim strsql As String
  strsql = "select * form student"
  GridView1.DataSource = class2.ds(strsql).Tables("student")
  GridView1.DataBind()


------解决方案--------------------
直接把 SqlDataAdapter 定义成这样
Dim myds2 As SqlDataAdapter = New SqlDataAdapter(str, myConn)
myds2.Fill(myds, "student")
Return myds
------解决方案--------------------
myComm = New SqlCommand(str, myConn)

 因为你只是把他new出来了，但从来就没使用过