vs .net下使用code behind技术问题

Inherits="sbgl.WebForm1"这是你的html页面第一句的部分语句，我想询问的是你的sbg1是不是名称空间的名称，如果是，那么在代码没有这个名称的限定啊！！
加上或者删除这个名称空间试一试！！

解决方案 »

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Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        '在此处放置初始化页的用户代码
        Label1.Text = "page load here"
    End Sub
不好意思不知道是vb
在Page_Load事件必须加上
if (!Page.IsPostBack)
{
Label1.Text = "page load here";
}(c#)，
这样就不会在事件执行时再进行一遍赋值了，你自己改成vb把,其他不用改
谢谢两位的帮助，我将程序又修改了
<%@ Page Language="vb" Codebehind="WebForm1.aspx.vb" AutoEventWireup="false" Inherits="sbgl.WebForm1" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>WebForm1</title>
<meta content="Microsoft Visual Studio .NET 7.0" name="GENERATOR">
<meta content="Visual Basic 7.0" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" runat="server">
<FONT face="宋体"></FONT><FONT face="宋体"></FONT><FONT face="宋体"></FONT><FONT face="宋体">
</FONT><FONT face="宋体"></FONT><FONT face="宋体"></FONT><FONT face="宋体"></FONT>
<br>
<asp:button id="ValidateBtn" style="Z-INDEX: 102; LEFT: 166px; POSITION: absolute; TOP: 168px" runat="server" Text="valid"></asp:button>
<asp:label id="lblOutput" style="Z-INDEX: 103; LEFT: 106px; POSITION: absolute; TOP: 56px" runat="server" Text="Fill in the required fields below" Width="237px" Font-Size="10" Font-Name="Verdana" ForeColor="red"></asp:label>
<asp:textbox id="TextBox1" style="Z-INDEX: 104; LEFT: 107px; POSITION: absolute; TOP: 90px" runat="server" Width="162px" Height="34px"></asp:textbox>
</form>
</body>
</HTML>Imports System
Imports System.ComponentModel.Design
Imports System.Data
Imports System.Drawing
Imports System.Web
Imports System.Web.SessionState
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.HtmlControls
Imports Microsoft.VisualBasic
Imports System.Reflection
Public Class WebForm1
    Inherits System.Web.UI.Page
    Protected WithEvents Form1 As System.Web.UI.HtmlControls.HtmlForm
    Protected WithEvents Form3 As System.Web.UI.HtmlControls.HtmlForm
    Protected WithEvents ValidateBtn As System.Web.UI.WebControls.Button
    Protected WithEvents lblOutput As System.Web.UI.WebControls.Label
    Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox
    Protected WithEvents Form5 As System.Web.UI.HtmlControls.HtmlForm#Region " Web 窗体设计器生成的代码 "    '该调用是 Web 窗体设计器所必需的。
    <System.Diagnostics.DebuggerStepThrough()>
    Private Sub InitializeComponent()    End Sub    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: 此方法调用是 Web 窗体设计器所必需的
        '不要使用代码编辑器修改它。
        InitializeComponent()
    End Sub#End Region
    Private Sub ValidateBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ValidateBtn.Click
        If Not IsPostBack Then
            'If (Page.IsValid) Then
            lblOutput.Text = "Page is Valid!"
            TextBox1.Text = "valid"
        Else
            lblOutput.Text = "Some of the required fields are empty"
        End If    End Sub
End Class可是依然不能得到我想要的结果，我想要这样的结果，但是这是我手工写的。
<%@ Page Language="VB" %>
<script runat="server">    ' Insert page code here
    '    Sub Button1_Click(sender As Object, e As EventArgs)
        message.text = "ok login"
    End Sub    Sub Page_Load(sender As Object, e As EventArgs)
        message.text = "请您登录"
    End Sub</script>
<html>
<head>
    <meta http-equiv="content-type" content="text/html;charset=gb2312" />
</head>
<body>
    <form runat="server">
        <p>
            <asp:Label id="Label1" runat="server" font-size="Large" borderstyle="Dotted">设备管理信息系统</asp:Label>
        </p>
        <p>
            <asp:Label id="Label2" runat="server">用户名：</asp:Label>
            <asp:TextBox id="TextBox1" runat="server"></asp:TextBox>
            <asp:RequiredFieldValidator id="RequiredFieldValidator1" runat="server" ErrorMessage="用户名必须输入" ControlToValidate="TextBox1"></asp:RequiredFieldValidator>
        </p>
        <p>
            <asp:Label id="Label3" runat="server">口令：</asp:Label>
            <asp:TextBox id="TextBox2" runat="server"></asp:TextBox>
            <asp:RequiredFieldValidator id="RequiredFieldValidator2" runat="server" ErrorMessage="口令必须输入" ControlToValidate="TextBox2"></asp:RequiredFieldValidator>
        </p>
        <p>
            <asp:Button id="Button1" onclick="Button1_Click" runat="server" Text="登录"></asp:Button>
        </p>
        <p>
            <asp:Label id="message" runat="server"></asp:Label>
        </p>
        
    </form>
</body>
</html>
some of the effects you are talking about are provided by the client side javascrript, if you want to do server side validation yourself, you should do something like    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
       if Not IsPostBack then
        lblOutput.Text = "请您登录"
end if
    End Sub    Private Sub ValidateBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ValidateBtn.Click
        If TextBox1.Text.Trim() <> String.Empty Then
            lblOutput.Text = "Page is Valid!"
            TextBox1.Text = "valid"
        Else
            lblOutput.Text = "Some of the required fields are empty"
        End If
    End Sub
saucer(思归/MVP) and other friends,thank you a lot,I see what you said,and i really want to validate something at server side.
I use vs.net 2002 to design my program,but it not work as I expected.
finally i download vs.net 2003 and redesign my program ,aha ,it work.
thank you again.