在网上看到的一个Server.Transfer例子,但我用Default2 myDF=(Default2)this.Context.Handler时根本就不行,不能实例其他页面的类的吗?那例子为什么又可以的?WebForm1上放置一个TextBox1和一个Button1，程序如下:1. public class WebForm1 : System.Web.UI.Page 2. { 3. protected System.Web.UI.WebControls.TextBox TextBox1; 4. protected System.Web.UI.WebControls.Button Button1; 5. private void Page_Load(object sender, System.EventArgs e) 6. { 7. Context.Items.Add("Context", "Context from Form1"); 8. } 9. /// <summary> 10. /// 页面的数据作为public属性被后面的页面程序访问 11. /// </summary> 12. public string Time 13. { 14. get { return DateTime.Now.ToString(); } 15. } 16. public string TestFun() 17. { 18. return "Function of WebForm1 Called"; 19. } 20. #region Web 窗体设计器生成的代码 21. override protected void OnInit(EventArgs e) 22. { 23. InitializeComponent(); 24. base.OnInit(e); 25. } 26. private void InitializeComponent() 27. { 28. this.Button1.Click += new System.EventHandler(this.Button1_Click); 29. this.Load += new System.EventHandler(this.Page_Load); 30. } 31. #endregion 32. private void Button1_Click(object sender, System.EventArgs e) 33. { 34. Server.Transfer("WebForm2.aspx", true); 35. } 36. } 在WebForm2上放置一个Literal1控件，程序如下：1. public class WebForm2 : System.Web.UI.Page 2. { 3. protected System.Web.UI.WebControls.Literal Literal1; 4. private void Page_Load(object sender, System.EventArgs e) 5. { 6. string strTxt = ""; 7. if (!IsPostBack) 8. { 9. WebForm1 oForm = (WebForm1)this.Context.Handler; 10. strTxt += "Value of Textbox:" + Request.Form["TextBox1"] + "<br>"; 11. strTxt += "Time Property:" + oForm.Time + "<br>"; 12. strTxt += "Context String:" + Context.Items["Context"].ToString() + "<br>"; 13. strTxt += oForm.TestFun() + "<br>"; 14. Literal1.Text = strTxt; 15. } 16. } 17. #region Web 窗体设计器生成的代码 18. override protected void OnInit(EventArgs e) 19. { 20. InitializeComponent(); 21. base.OnInit(e); 22. } 23. private void InitializeComponent() 24. { 25. this.Load += new System.EventHandler(this.Page_Load); 26. } 27. #endregion 28. }
Server.Transfer传值小例子 在查询页面中设置如下公有属性(QueryPage.aspx)：
public class QueryPage : System.Web.UI.Page
{
protected System.Web.UI.WebControls.TextBox txtStaDate;
protected System.Web.UI.WebControls.TextBox txtEndDate;
...
/// <summary>
/// 开始时间
/// </summary>
public string StaDate
{
get{ return this.txtStaDate.Text;}
set{this.txtStaDate.Text = value;}
}
/// <summary>
/// 结束时间
/// </summary>
public string EndDate
{
get{ return this.txtEndDate.Text;}
set{this.txtEndDate.Text = value;}
}
....
private void btnEnter_Click(object sender, System.EventArgs e)
{
Server.Transfer("ResultPage.aspx");
}
}在显示查询结果页面(ResultPage.aspx)：
public class ResultPage : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e)
{ //转换一下即可获得前一页面中输入的数据
QueryPage queryPage = ( QueryPage )Context.Handler; Response.Write( "StaDate：" );
Response.Write( queryPage.StaDate );
Response.Write( "<br/>EndDate：" );
Response.Write( queryPage.EndDate );
}
}
a页面代码：<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="a.aspx.cs" Inherits="WebApplication.a" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /></div>
</form>
</body>
</html>namespace WebApplication
{
public partial class a : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ } public string testName
{
get { return DateTime.Now.ToString(); }
} protected void Button1_Click(object sender, EventArgs e)
{
Server.Transfer("b.aspx",true);
}
}
}
b页面代码：<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="b.aspx.cs" Inherits="WebApplication.b" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>namespace WebApplication
{
public partial class b : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
a p = (a)this.Context.Handler;
Response.Write(p.testName);
}
}
}
}