急电！！！！！Dateview 的RowUpdating不能更新

Protected Sub gv_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles gv.RowUpdating

Dim i As String = CType((gv.Rows(e.RowIndex).Cells(1).Controls(0)), TextBox).Text.ToString.Trim

Dim s As String = "Data Source=.;Initial Catalog=teacher;Integrated Security=True"
Dim s1 As String = CType((gv.Rows(e.RowIndex).Cells(2).Controls(0)), TextBox).Text.ToString.Trim
Dim s2 As String = CType((gv.Rows(e.RowIndex).Cells(3).Controls(0)), TextBox).Text.ToString.Trim
Dim s3 As String = "update AA set name='" + s1 + "',password='" + s2 + "'where id='" + i + "'"
Dim sql As New SqlConnection(s)
Dim sqlcom As New SqlCommand(s3, sql)
sql.Open()
Session.Clear()
Session("ss") = s1//错误 “取出来的数值 是更新前的数据”

sqlcom.ExecuteNonQuery()

sql.Close()

gv.EditIndex = -1
bind()