用戶控件向網(wǎng)頁傳遞值，方法非常之多，此博文嘗試使用反射來實(shí)現(xiàn)。在站點(diǎn)中，建一個(gè)網(wǎng)頁以及一個(gè)用戶控件。 網(wǎng)頁切換至設(shè)計(jì)模式，拉用戶控件至網(wǎng)頁上。
Default.aspx:
復(fù)制代碼 代碼如下:
%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
%@ Register Src="InsusUC.ascx" TagName="InsusUC" TagPrefix="uc1" %>
!DOCTYPE html>
html xmlns="http://www.w3.org/1999/xhtml">
head runat="server">
title>/title>
/head>
body>
form id="form1" runat="server">
div>
uc1:InsusUC ID="InsusUC1" runat="server" />
br />
br />
Hi, You input infor as below:br />
first textbox value:
asp:Label ID="LabelshowFirstValue" runat="server" Text="" ForeColor="Red">/asp:Label>br />
Second textbox value:
asp:Label ID="LabelshowLastValue" runat="server" Text="" ForeColor="Red" >/asp:Label>
/div>
/form>
/body>
/html>
Default.aspx.cs，建一個(gè)帶兩個(gè)參數(shù)的public方法。
復(fù)制代碼 代碼如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
public void ReadUCMessage(string value1, string value2)
{
this.LabelshowFirstValue.Text = value1;
this.LabelshowLastValue.Text = value2;
}
}
接下來，我們創(chuàng)建一個(gè)用戶控件:
復(fù)制代碼 代碼如下:
%@ Control Language="C#" AutoEventWireup="true" CodeFile="InsusUC.ascx.cs" Inherits="InsusUC" %>
First Name asp:TextBox ID="TextboxFirstName" runat="server">/asp:TextBox>br />
Last Name asp:TextBox ID="TextboxLastName" runat="server">/asp:TextBox>br />
asp:Button ID="ButtonTransmit" runat="server" Text="Transmit" OnClick="ButtonTransmit_Click" />
寫銨鈕事件，首先引用namespace using System.Reflection;
有關(guān)type.InvokeMember()方法，可以參考msdn:http://msdn.microsoft.com/zh-cn/library/de3dhzwy(v=vs.80).aspx
復(fù)制代碼 代碼如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Reflection;
public partial class InsusUC : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void ButtonTransmit_Click(object sender, EventArgs e)
{
string v1 = this.TextboxFirstName.Text.Trim();
string v2 = this.TextboxLastName.Text.Trim();
this.Page.GetType().InvokeMember("ReadUCMessage", BindingFlags.InvokeMethod, null, this.Page, new object[] { v1,v2 });
}
}
演示：
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