ASP.NET中动态加载用户控件并传值

作者:互联网   出处:控件中国网   2014-11-05 19:05:06   阅读:1

ASP.NET中动态加载用户控件并传值

ASP.NET 页面:在此页面动态调用用户控件(.ASCX)

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

<%@ Register Src="ChapterCourseware.ascx" TagName="ChapterCourseware" TagPrefix="uc2" %>

<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div id="info_1">
        <asp:PlaceHolder runat="server" ID="phCourseware"></asp:PlaceHolder>
    </div>
    </form>
</body>
</html>
 

 ASP.NET 后台代码:


using System;
using System.Data;
using System.Configuration;
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)
    {
        TabLoadControls();
    }


    #region 加载控件
    private void TabLoadControls(int iChapterId, int iCourseID)
    {
        /*
         *  第一种方法:这种方法能传值
         *  这种写法需要在前台页面中拖拽控件ChapterCourseware.ascx,也就是在Default.aspx页面中加入这行代码:
         * <%@ Register Src="ChapterCourseware.ascx" TagName="ChapterCourseware" TagPrefix="uc2" %>
         */
        //清楚容器控件中的控件
        //phCourseware.Controls.Clear();

        ASP.teachercenter_controls_chaptercourseware_ascx ucCourseware = new ASP.teachercenter_controls_chaptercourseware_ascx();
        //给用户控件传值
        ucCourseware.ChapterId = iChapterId;
        ucCourseware.CourseID = iCourseID;
        //加载用户控件至容器控件中
        phCourseware.Controls.Add(ucCourseware);

 

        /* 
         *  第二种,不需要传值的写法
         *  这种写法不需要在前台页面中拖拽控件ChapterCourseware.ascx,也就是在Default.aspx页面中不需要这行代码:
         * <%@ Register Src="ChapterCourseware.ascx" TagName="ChapterCourseware" TagPrefix="uc2" %>
         *
        */

        phCourseware.Controls.Add(TemplateControl.LoadControl("~/ChapterCourseware.ascx"));
    }
    #endregion
}
 

 

ChapterCourseware.ascx 控件的后台代码中写入属性以用于接收参数:

#region 页面参数  课程ID:CourseID  章节ID:ChapterId
    /// <summary>
    /// 课程ID
    /// </summary>
    public int CourseID
    {
        get
        {
            return (int)ViewState["CourseID"];
        }
        set
        {
            ViewState["CourseID"] = value;
        }
    }

    /// <summary>
    /// 章节ID
    /// </summary>
    public int ChapterId
    {
        get
        {
            if (ViewState["ChapterId"] != null)
                return Convert.ToInt32(ViewState["ChapterId"]);
            else
                return -1;
        }
        set
        {
            ViewState["ChapterId"] = value;
        }
    }
    #endregion
 

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