F6 Team

最近在小舖裡看到了這方面的問題....

小弟找了很多的資料..做一個範例介紹如何動態載入User Control

與如何透過aspx網頁訂閱User Control的Event,來取得相關的資訊

此範例先做一個檔案上傳的User Control,當網頁需要用到上傳功能時..

就可以將此控項制拉進來,,或用動態載入的方式來載入此控制項

所以此範例將會出現兩個User Control(一個是用拉的,一個是動態載入的)

當使用者選取好檔案,按upload時,aspx網頁就可以取得user control傳過來的檔案資訊

這樣一來以後就不用重覆寫上傳檔案的程式了,,只要拉一個user control就可以快速讓網頁有上傳的功能了

c#範例

User Control
WebUserControl.ascx

WebUserControl.ascx.cs

01 using ...System;
02 using System.Data;
03 using System.Configuration;
04 using System.Collections;
05 using System.Web;
06 using System.Web.Security;
07 using System.Web.UI;
08 using System.Web.UI.WebControls;
09 using System.Web.UI.WebControls.WebParts;
10 using System.Web.UI.HtmlControls;
11
12 public partial class WebUserControl : System.Web.UI.UserControl
13 ...{
14     //客制一個事件參數
15     public class MyEventArgs : EventArgs
16     ...{
17         string _FileName = string.Empty;
18         int _FileSize;
19
20         public string FileName
21         ...{
22             set ...{ _FileName = value; }
23             get ...{ return _FileName; }
24         }
25
26         public int FileSize
27         ...{
28             set ...{ _FileSize = value; }
29             get ...{ return _FileSize; }
30         }
31
32     }
33
34     public delegate void MyClick(object sender, MyEventArgs e);
35
36     public event MyClick cClick;
37
38     private void WebUserControl_Click(object sender, MyEventArgs e)
39     ...{
40         if (cClick != null)
41         ...{
42             cClick(sender, e);
43         }
44     }
45
46     protected void Page_Load(object sender, EventArgs e)
47     ...{
48
49     }
50     protected void btnUpload_Click(object sender, EventArgs e)
51     ...{
52         MyEventArgs EventArgs = new MyEventArgs();
53
54         EventArgs.FileName = this.FileUpload1.FileName;
55         EventArgs.FileSize = this.FileUpload1.PostedFile.ContentLength;
56         //上傳到upload資料夾裡
57         this.FileUpload1.SaveAs(Server.MapPath("~/upload/") + this.FileUpload1.FileName);
58
59         WebUserControl_Click(this, EventArgs);
60     }
61
62 }

aspx網頁
UserControl.aspx

UserControl.aspx.cs

01 using ...System;
02 using System.Data;
03 using System.Configuration;
04 using System.Collections;
05 using System.Web;
06 using System.Web.Security;
07 using System.Web.UI;
08 using System.Web.UI.WebControls;
09 using System.Web.UI.WebControls.WebParts;
10 using System.Web.UI.HtmlControls;
11
12 public partial class UserControl : System.Web.UI.Page
13 ...{
14     protected void Page_Init(object sender, EventArgs e)
15     ...{
16         //動態加入UserControl
17         WebUserControl c = (WebUserControl)LoadControl("WebUserControl.ascx");
18         c.cClick += new WebUserControl.MyClick(c_cClick);
19         this.Page.Form.Controls.Add(c);
20     }
21
22     //動態加入UserControl的事件
23     void c_cClick(object sender, WebUserControl.MyEventArgs e)
24     ...{
25         Response.Write(e.FileName + "<br/>" + e.FileSize);
26     }
27
28     protected void Page_Load(object sender, EventArgs e)
29     ...{
30
31     }
32
33     //事先拉好的UserControl事件
34     //在UserControl.aspx裡有一個OncClick="WebUserControl1_cClick",就是對應到此事件
35     protected void WebUserControl1_cClick(object sender, WebUserControl.MyEventArgs e)
36     ...{
37         Response.Write(e.FileName + "<br/>" + e.FileSize);
38     }
39 }

執行結果：


參考網址：
http://www.thescripts.com/forum/thread232638.html

http://blog.blueshop.com.tw/jeff377/archive/2008/01/19/54090.aspx

http://www.blueshop.com.tw/board/show.asp?subcde=BRD20080224205358PAU&fumcde=FUM20041006161839LRJ&rplcnt=4

http://blog.xuite.net/cct0201/derek/15360068