技术资料 > .Net专区 > Asp.Net开发 : 在 ASP.NET 中使用多个 runat=server form

在 ASP.NET 中使用多个 runat=server form

March 25,2004

ASP.NET 在同一个页面不支持多个 runat=server forms，要解决这个问题，可以把每个 form 放在一个单独的 panel 控件中，这样用户就可以简单地通过单选按钮在不同 panel 间切换。
代码如下：
2FormExample.aspx

<%@ Page language="c#" Codebehind="2FormExample.cs" AutoEventWireup="false" Inherits="_3leaf_app.C2FormExample" %>
<html><head>
<meta name=vs_targetSchema content="HTML 4.0">
<meta name="GENERATOR" Content="Microsoft Visual Studio 7.0">
<meta name="CODE_LANGUAGE" Content="C#"></head>
<body>

<form method="post" runat="server" ID=Form1>
<p>Lookup by
<asp:RadioButton id=RadioButton1 runat="server" Text="First Name" AutoPostBack="True"  groupname=g1 checked=True></asp:RadioButton>
<asp:RadioButton id=RadioButton2 runat="server" Text="Last Name" AutoPostBack="True" groupname=g1></asp:RadioButton></p>
<p></p>
<p>
<asp:Panel id=Panel1 runat="server" visible=True>
      First Name :
      <asp:TextBox id=TextBox1 runat="server"></asp:TextBox>
      <asp:RequiredFieldValidator id=RequiredFieldValidator1 runat="server" ErrorMessage="*" ControlToValidate="TextBox1"></asp:RequiredFieldValidator>
      <asp:Button id=Button1 runat="server" Text="Submit"></asp:Button>
</asp:Panel>
<asp:Panel id=Panel2 runat="server" visible=False>
      Last Name :
      <asp:TextBox id=TextBox2 runat="server"></asp:TextBox>
      <asp:RequiredFieldValidator id=RequiredFieldValidator2 runat="server" ErrorMessage="*" ControlToValidate="TextBox2"></asp:RequiredFieldValidator>
      <asp:Button id=Button2 runat="server" Text="Submit"></asp:Button>
</asp:Panel>
<p></p>
<p>
      <asp:label id=Label1 runat="server"></asp:label>
</p>
</form>

</body></html>

2FormExample.cs

namespace _3leaf_app
{
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

/// <summary>
/// Summary description for C2FormExample.
/// </summary>
public class C2FormExample : System.Web.UI.Page
{
  protected System.Web.UI.WebControls.Button Button2;
  protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;
  protected System.Web.UI.WebControls.TextBox TextBox2;
  protected System.Web.UI.WebControls.Button Button1;
  protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
  protected System.Web.UI.WebControls.TextBox TextBox1;
  protected System.Web.UI.WebControls.Label Label1;
  protected System.Web.UI.WebControls.Panel Panel2;
  protected System.Web.UI.WebControls.Panel Panel1;
  protected System.Web.UI.WebControls.RadioButton RadioButton2;
  protected System.Web.UI.WebControls.RadioButton RadioButton1;

public C2FormExample()
{
      Page.Init += new System.EventHandler(Page_Init);
      }

      protected void Page_Load(object sender, EventArgs e)
      {
         if (!IsPostBack)
         {
         }
      }

      protected void Page_Init(object sender, EventArgs e)
      {
         //
         // CODEGEN: This call is required by the ASP+ Windows Form Designer.
         //
         InitializeComponent();
      }

      /// <summary>
      /// Required method for Designer support - do not modify
      /// the contents of this method with the code editor.
      /// </summary>
      private void InitializeComponent()
  {
RadioButton1.CheckedChanged += new System.EventHandler (this.RadioButton1_CheckedChanged);
Button1.Click += new System.EventHandler (this.Button1_Click);
RadioButton2.CheckedChanged += new System.EventHandler (this.RadioButton2_CheckedChanged);
Button2.Click += new System.EventHandler (this.Button2_Click);
this.Load += new System.EventHandler (this.Page_Load);
  }

      public void Button2_Click (object sender, System.EventArgs e)
      {
         Label1.Text = "You want to search on last name";
      }

      public void Button1_Click (object sender, System.EventArgs e)
      {
         Label1.Text = "You want to search on first name";
      }

      public void RadioButton2_CheckedChanged (object sender, System.EventArgs e)
      {
         Panel1.Visible = false;
         Panel2.Visible = true;
      }

      public void RadioButton1_CheckedChanged (object sender, System.EventArgs e)
      {
         Panel1.Visible = true;
         Panel2.Visible = false;
      }
}
}