修改SQL表中数据的问题
Partial Class upuser
Inherits System.Web.UI.Page
Dim sqlcon As New SqlConnection
Dim myCommand As New SqlCommand


Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim student_id As String = Request.Cookies( "userInf ").Values( "userID ")
Dim con As New SqlConnection( "server=.;database=user;uid=lgw;password=lgw ")
Dim cmd As New SqlCommand( "select * from users where id= ' " & Request.Cookies( "userInf ").Values( "userID ") & " ' ", con)
Dim dr As SqlDataReader
con.Open()
dr = cmd.ExecuteReader

dr.Read()
showid.Text = dr.Item( "id ")
showName.Text = dr.Item( "name ")
showTel.Text = dr.Item( "tel ").ToString
showEmail.Text = dr.Item( "email ").ToString
showIntro.Text = dr.Item( "intro ").ToString
con.Close()

If DateTime.Now.Hour > = 6 And DateTime.Now.Hour < 12 Then
spWelMessage.Text = "早上好，登录ID为（ " & student_id & "） "
ElseIf DateTime.Now.Hour > = 12 And DateTime.Now.Hour < 18 Then
spWelMessage.Text = "下午好，登录ID为（ " & student_id & "） "
Else
spWelMessage.Text = "晚上好，登录ID为（ " & student_id & "） "
End If
End Sub


Protected Sub reset_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Reset.Click
showPWD.Text = " "
textpwd.Text = " "

showName.Text = " "
showTel.Text = " "
showEmail.Text = " "
showIntro.Text = " "
End Sub


Protected Sub Enter_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Enter.Click

Dim myCommand As New SqlCommand
Dim sqld2 As String
Dim ds As New Data.DataSet
sqlcon = New SqlConnection( "server=.;database=user;uid=lgw;password=lgw ")
sqlcon.Open()
'myCommand.Connection = sqlcon
sqld2 = "update users set intro= ' " & showIntro.Text & " ' where id= ' " & showid.Text & " ' "
myCommand = New SqlCommand(sqld2, sqlcon)
myCommand.ExecuteNonQuery()
sqlcon.Close()

End Sub
End Class

最后是修改数据库中users表里面的数据，我运行的时候没有出现错误，但数据库里面的信息却没有改变，是那里有错了啊？？？

[解决办法]
在page_load的代码里加上 if not Page.IsPostBack Then Dim student_id As String = Request.Cookies( "userInf ").Values( "userID ") ................End IF