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使用反射把用户控件(ASCX)传至网页(ASPX) -

[日期:2013-03-24] 来源:  作者: [字体: ]

用户控件向网页传递值,方法非常之多,此博文尝试使用反射来实现。在站点中,建一个网页以及一个用户控件。 网页切换至设计模式,拉用户控件至网页上。

Default.aspx:

View Code
<%@ 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,建一个带两个参数的public方法。

View Code
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;
    }
}


接下来,我们创建一个用户控件:

View Code
<%@ 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"  />


写铵钮事件,首先引用namespace  using System.Reflection;
有关type.InvokeMember()方法,可以参考msdn:http://msdn.microsoft.com/zh-cn/library/de3dhzwy(v=vs.80).aspx

View Code
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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