我自己写的自定义Web的上传控件

我自己写的自定义Web的上传控件

- 中国WEB开发者网络 (http://www.webasp.net)
-- 技术教程 (http://www.webasp.net/article/)
--- 我自己写的自定义Web的上传控件 (http://www.webasp.net/article/6/5208.htm)

-- 作者：未知
-- 发布日期： 2003-07-12

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Drawing;
using System.Drawing.Design;
namespace Yingnet.Common
{
/// <summary>
/// FileUpload 的摘要说明。E:\program\Common\FileUpload.bmp
/// </summary>
[ToolboxBitmap(typeof(Yingnet.Common.FileUpload), "FileUpload.bmp"),
DefaultProperty("Text"), DefaultEvent("Click"),
ToolboxData("<{0}:FileUpload runat=server></{0}:FileUpload>")]
public class FileUpload : System.Web.UI.WebControls.WebControl {
  /// <summary>
  /// 上传按钮
  /// </summary>
  private Button button=new Button();
  /// <summary>
  /// 上传文件个数
  /// </summary>
  private int filenum=1;
  /// <summary>
  /// File对象
  /// </summary>
  private HtmlInputFile[] file;
  /// <summary>
  /// 保存路径，默认为系统的临时目录
  /// </summary>
  private string path=System.IO.Path.GetTempPath();
  /// <summary>
  /// 上传的文件名组
  /// </summary>
  private string[] filename;
  /// <summary>
  /// 后缀文件名组
  /// </summary>
  private string[] suffix;
  /// <summary>
  ///过滤器，写法是.txt;.abc
  /// </summary>
  private string filter="";
  /// <summary>
  /// 限制文件上传大小，为0是不限制，单位是字节
  /// </summary>
  private int size=0;//System.ComponentModel.DefaultEventAttribute

    /// <summary>
    /// 上传事件
    /// </summary>
  [Bindable(true),Category("事件"),Description("上传后激发的事件")
  ]
  public event EventHandler Click;
  /// <summary>
  /// 上传文件数
  /// </summary>
  [Bindable(true),
  Category("参数"),Description("设定上传文件的个数"),
  DefaultValue("1")]
  public int FileNum{
   set{
    if(value<1){
     value=1;
    }
    filenum=value;
    this.Controls.Clear();
    file=new HtmlInputFile[filenum];
    filename=new string[filenum];
    suffix=new string[filenum];
    for(int i=0;i<filenum;i++) {
     file[i]=new HtmlInputFile();
     this.Controls.Add(file[i]);
    }
    this.Controls.Add(button);
   }
   get{
    return filenum;
   }
  }
  /// <summary>
  /// 上传按钮的文本
  /// </summary>
  [Bindable(true),
  Category("参数"), Description("设定上传文件的路径"),
  DefaultValue("1")]
   /// <summary>
   /// 上传路径
   /// </summary>
  public string UploadPath {
   set{
    if("".Equals(value)||value==null){
     value=System.IO.Path.GetTempPath();
    }
    path=value;
   }
   get{
    return path;
   }
  }
  /// <summary>
  /// 得到文件名
  /// </summary>
  public string[] Filename{
   get{
    return filename;
   }
  }
  /// <summary>
  /// 得到后缀
  /// </summary>
  public string[] Suffix{
   get{
    return  suffix;
   }
  }
  /// <summary>
  /// 过滤器
  /// </summary>
  public string Filter{
   set{
    filter=value;
   }
   get{
    return filter;
   }
  }
  /// <summary>
  /// 限制大小
  /// </summary>
  public int FileSize{
   set{
    size=value;
   }
   get{
    return size;
   }
  }
  /// <summary>
  /// 快捷键
  /// </summary>
  public override string AccessKey{
   get{
    return button.AccessKey;
   }
   set{
    button.AccessKey=value;
   }
  }
  /// <summary>
  /// 背景
  /// </summary>
  public override System.Drawing.Color BackColor{
   get{
    return button.BackColor;
   }
   set{
    button.BackColor=value;
   }
  }
  /// <summary>
  /// 边框颜色
  /// </summary>
  public override System.Drawing.Color BorderColor{
   get{
    return button.BorderColor;
   }
   set{
    button.BorderColor=value;
   }
  }
  /// <summary>
  /// 边框风格
  /// </summary>
  public override BorderStyle BorderStyle{
   get{
    return button.BorderStyle;
   }
   set{
    button.BorderStyle=value;
   }
  }
  /// <summary>
  /// 文本
  /// </summary>
  [Bindable(true),
   Category("Appearance"),
   DefaultValue("")]
  public string Text
  {
   get
   {
    return button.Text;
   }
   set
   {
    button.Text = value;
   }
  }

  public FileUpload():base(){

   FileNum=1;
   button.Click+=new EventHandler(this.button_Click);
   this.Controls.Add(button);

  }
  /// <summary>
  /// 按钮事件
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void button_Click(object sender, EventArgs e){
   Upload();
   ///添加你的代码
   if(Click!=null)
    Click(sender,e);  ///抛处事件
  }
  /// <summary>
  /// 上传
  /// </summary>
  private void Upload(){
   System.Web.HttpPostedFile postedFile;
   for(int i=0;i<filenum;i++){
    try{
     postedFile=file[i].PostedFile;
     if(postedFile!=null) {
      if(postedFile.ContentLength>size && size!=0){
       break;
      }
      string suf=GetSuffix(postedFile.FileName);
      if(filter!=null && filter.IndexOf(suf)>-1){
       break;
      }
      filename[i]=DateTime.Now.Ticks.ToString();
      suffix[i]=suf;
      postedFile.SaveAs(System.IO.Path.Combine(path,filename[i]+suf));


     }
    }finally{
     filename[i]="";
    }
   }
  }
  /// <summary>
  /// 获取后缀名
  /// </summary>
  /// <param name="filename">文件名</param>
  /// <returns>返回带.的后缀名</returns>
  private string GetSuffix(string filename){
   int index=filename.LastIndexOf(".");
   if(index>0){
    return filename.Substring(index);
   }
   return "";
  }

}
}

webasp.net