下面是一个以查询为主的代码页，用的是datagrid，查询中我使用了一个DropDownList，用来判断是根据学号查询，还是根据用户名查询，至于查询的范围，你可以任意加的，至于显示共有多少页及当前页面的代码，我前面已经发过了：）
 这里用到了一个隐藏域，目的是避免当前页的索引值小于0。


代码如下：

 Sub pagechange(ByVal sender As Object, ByVal e As DataGridPageChangedEventArgs)
'//////////////bata2中必须写的，否则将不能换页！
DataGrid1.CurrentPageIndex = e.NewPageIndex
bindgrid()
End Sub

Public Sub bindgrid()
Select Case DropDownList1.SelectedIndex
Case 0
'//////////////在下面的sql语句里你可以增加查询字段
Dim sql As String = "select * from stu_base where stu_id like '%" & keyword.Text & "%'"
Dim comm As SqlDataAdapter = New SqlDataAdapter(sql, conn)
Dim ds As DataSet
ds = New DataSet()
comm.Fill(ds, "stu_base")
If ds.tables("stu_base") Is "" Then
DataGrid1.Visible = False
Else
DataGrid1.DataSource = ds.Tables("stu_base").DefaultView
If ds.tables("stu_base").rows.count = 0 Then'//////////////判断数据库是否为空
DataGrid1.Visible = False
Label6.Visible = True
Else
Label6.Visible = False
DataGrid1.Visible = True
DataGrid1.DataBind()
End If

End If

Case 1
Dim sql As String = "select * from stu_base where name like '%" & keyword.Text & "%'"
Dim comm As SqlDataAdapter = New SqlDataAdapter(sql, conn)
Dim ds As DataSet
ds = New DataSet()
comm.Fill(ds, "stu_base")
DataGrid1.DataSource = ds.Tables("stu_base").DefaultView
DataGrid1.DataBind()
End Select
End Sub

Private Sub querry1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles querry1.Click
'//////////////隐藏域，用来转换数据
keyword.Text = querry.Text
DataGrid1.CurrentPageIndex = 0
bindgrid()
 &nb