ASP.NET文件上传与验证-优快云博客

LEADBBS CODE

<%@ 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>FileUpload</title>
</head>
<body>
<form id="form1" runat="server">
<div>
   <asp:FileUpload ID="FileUpload1" runat="server" />
   <asp:Button ID="btnUpload" runat="server" Text="Upload" OnClick="btnUpload_Click" /><br />
   <asp:Image ID="imgFile" runat="server" ImageUrl="" Visible="false" /><br />
   <asp:Label ID="lblMessage" runat="server"></asp:Label>


</div>
</form>
</body>
</html>

LEADBBS CODE

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;
using System.IO;
public partial class _Default : System.Web.UI.Page
{

protected void Page_Load(object sender, EventArgs e)
{

}
protected void btnUpload_Click(object sender, EventArgs e)
{
   if (this.FileUpload1.HasFile) ///有文件执行操作
   {
      #region 检测文件路径，大小
      string strErr="";//错误信息
      int w=0;
      int h=0;
      if (this.FileUpload1.PostedFile == null)
      {
            strErr += "对不起，上传文件不能为空！//n";
      }

      int filesize = this.FileUpload1.PostedFile.ContentLength;
      if (filesize < 1)
      {
            strErr += "对不起，上传文件不能为空！//n";
      }
      if (filesize > 10485760)
      {
            strErr += "对不起，文件大小不能大于10M！//n";
      }

      strErr = strErr.Trim();
      if (strErr != "")
      {
            this.lblMessage.Text = strErr;
            return ;
      }
      #endregion

      #region 获得文件信息
      string filename;
      string filetype;
      string savename;

      filetype = this.FileUpload1.PostedFile.ContentType.ToString();
      filename = this.FileUpload1.FileName;
      savename = System.DateTime.Now.ToString("yyyyMMddHHmmss") + filename;
      #endregion

      #region 检测类型
      strErr = "";
      switch (filetype)
      {
            case "image/gif":
            case "image/bmp":
            case "image/pjpeg":
               {
                  System.IO.Stream s = this.FileUpload1.PostedFile.InputStream;
                  System.Drawing.Image i = System.Drawing.Image.FromStream(s);
                     w = i.Width;
                     h = i.Height;

                  #region 判断尺寸
                  // if(this.lblWidth.Text!="")
                  // {
                  // if(w>int.Parse(this.lblWidth.Text))
                  // {
                  // strErr+="对不起，该文件格式超过规定宽度！//n";
                  // }
                  // }
                  // if(this.lblHigh.Text!="")
                  // {
                  // if(h>int.Parse(this.lblHigh.Text))
                  // {
                  // strErr+="对不起，该文件格式超过规定高度！//n";
                  // }
                  // }
                  #endregion
               }
               break;
            //case "application/x-shockwave-flash":
            //case "application/octet-stream":
            // break;
            //case "video/x-ms-wmv":
            //case "video/mpeg":
            //case "video/x-ms-asf":
            //case "video/avi":
            //case "audio/mpeg":
            //case "audio/mid":
            //case "audio/wav":
            //case "audio/x-ms-wma":
            // break;
            //case "application/vnd.rn-realmedia-vbr":
            // break;
            default:
               strErr += "对不起，不允许该文件格式上传！//n";
               break;
      }
      if (strErr != "")
      {
            this.lblMessage.Text = strErr;
            return;
      }
      #endregion

      string strInfo="";

      strInfo += "文件名：" + filename + "<br>";
      strInfo += "文件大小：" + filesize + "<br>";
      strInfo += "文件类型：" + filetype + "<br>";
      strInfo += "文件高度：" + h + "<br>";
      strInfo += "文件宽度：" + w + "<br>";

      string savepath = "UpPic" + "//" + savename;
      string fullpath = Server.MapPath("UpPic") + "//" + savename;
      this.FileUpload1.SaveAs(fullpath);

      this.lblMessage.Text = strInfo;
      this.imgFile.ImageUrl = savepath;
      this.imgFile.Visible = true;
   }
}
}