用戶控件(ASCX)向網頁(ASPX)傳值使用反射實現

2020-01-18 00:05:51

字體：大中小

來源：轉載

供稿：網友

用戶控件向網頁傳遞值，方法非常之多，此博文嘗試使用反射來實現。在站點中，建一個網頁以及一個用戶控件。網頁切換至設計模式，拉用戶控件至網頁上。

Default.aspx:

 
<%@ 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，建一個帶兩個參數的public方法。

復制代碼代碼如下:

 
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，我們創建一個用戶控件:

復制代碼代碼如下:

 
<%@ 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type.InvokeMember()方法，可以參考msdn:http://msdn.microsoft.com/zh-cn/library/de3dhzwy(v=vs.80).aspx

復制代碼代碼如下:

 
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 }); 
} 
} 