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一个vb.net的用户登陆页面代码Private Sub Button2_Click(ByVal sender As System.Object, If TextBox3.Text = "" Or TextBox4.Text = "" Then Label35.Text = "请确认您的输入!" Return End If Dim sql As String = "select * from pwd where stu_id=@stu_id and pwd=@pwd" Dim comm As SqlCommand = New SqlCommand(sql, conn) comm.Parameters.Add(New SqlParameter("@stu_id", SqlDbType.Int, 4)) comm.Parameters("@stu_id")。Value = TextBox3.Text comm.Parameters.Add(New SqlParameter("@pwd", SqlDbType.Char, 16)) comm.Parameters("@pwd")。Value = TextBox4.Text Dim dr As SqlDataReader conn.Open() dr = comm.ExecuteReader If dr.Read Then Session("stu_id") = TextBox3.Text dr.Close() comm.Cancel() Dim sql_3 As String = "update stu_base set point=point+1 where stu_id=@stu_id" comm = New SqlCommand(sql_3, conn) comm.Parameters.Add(New SqlParameter("@stu_id", SqlDbType.Int, 4)) comm.Parameters("@stu_id")。Value = Session("stu_id") comm.ExecuteNonQuery() comm.Cancel() Response.Redirect("detail.aspx?stu_id=''" & Session("stu_id") & "''") Else Label35.Text = "您还没有注册或账号密码错误" End If End Sub Private Sub Button1_Click(ByVal sender As System.Object, TextBox1.Text = "" TextBox2.Text = "" End Sub
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