为什么会只显示表的属性却没显示值？麻烦会的解答下。谢谢！

VB code

Dim conn As New ADODB.Connection    Dim rs As New ADODB.Recordset        Dim strCon As String    Dim Sql As String        Dim name As String        strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False;Data Source=" & App.Path & "\student.mdb;"         Sql = "select * from sc where 学号='" & Form3.Text1.Text & "'"    DataGrid1.Refresh    ''''''       conn.ConnectionString = strCon     conn.Open        rs.CursorLocation = adUseClient    rs.Open Sql, conn, adOpenDynamic, adLockOptimistic, adCmdext ''''''    Set DataGrid1.DataSource = rs

[解决办法]
1，检查输入的学号条件是否存在
2，将 rs.Open Sql, conn, adOpenDynamic, adLockOptimistic, adCmdext
改成 rs.Open Sql, conn, adOpenkeyset,adlockreadonly 试试

[解决办法]
conn.ConnectionString = strCon
conn.CursorLocation = adUseClient
conn.Open