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写一个自定义的控件接口 C#

 

 

以下是我的测试代码：
APP_Code/ucInterface.cs

/* APP_Code/ucInterface.cs */
/// <summary>
/// Summary description for ucInterface
/// </summary>
public interface ucInterface
{
    int id
    {
        get;
        set;
    }
}

 

WebUserControl.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControl.ascx.cs" Inherits="WebUserControl" %>
<asp:Label ID="Label1" runat="server" Text='<%# id %>'></asp:Label>

 

WebUserControl.ascx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class WebUserControl : System.Web.UI.UserControl, ucInterface
{
    private int _id = 2;//有一个初始值2.
    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.DataBind();
    }
    public int id
    {
        get { return ViewState["__id"] == null ? this._id : (int)ViewState["__id"]; }
        set
        {
            this._id = value;
            ViewState["__id"] = value;
        }
    }
}

 

 

default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!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>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
        <div id="div1" runat="server" />
        
    </form>
</body>
</html>

 

 

default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Control c = Page.LoadControl("WebUserControl.ascx");
            c.ID = "uc1";
            div1.Controls.Add(c);

        }
        ucInterface uc1 = Page.FindControl("uc1") as ucInterface;//转化到app_code中的 ucInterface 接口
        uc1.id = 234324324;//OK, 重新设置id的值（它的初始值我乱写的，是2）
        //Page.DataBind();//不用再调用数据绑定也行。页面是显示：234324324而不是2，注释掉上面一句页面就会显示2了。说明我们成功的使用了usercontrol的中属性。
    }
}

 

posted on 2013-09-04 15:28  天使半只翼  阅读(836)  评论(0)  编辑  收藏  举报