aspnet图片上传-简单实用(VS2008 FileUpload控件 ASPNET20)按时间

aspnet图片上传-简单实用(VS2008 FileUpload控件+ASPNET20)按时间.txt同志们：别炒股，风险太大了，还是做豆腐最安全！做硬了是豆腐干，做稀了是豆腐脑，做薄了是豆腐皮，做没了是豆浆，放臭了是臭豆腐！稳赚不亏呀！using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.IO;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

namespace FileUpload

{

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void btnFileUpload_Click(object sender, EventArgs e)

{

UploadPicFile(ImgFileUpload);

}

internal readonly string AllowExt = "jpe|jpeg|jpg|png|tif|tiff|bmp|gif|wbmp|swf|psd";

///

/// 检测扩展名的有效性

///

/// 文件名扩展名

/// 如果扩展名有效,返回true,否则返回false.

bool CheckValidExt(string sExt)

{

bool flag = false;

string[] aExt = AllowExt.Split('|');

foreach (string filetype in aExt)

{

if (filetype.ToLower() == sExt.Replace(".", ""))

{

flag = true;

break;

}

}

return flag;

}

private void UploadPicFile(System.Web.UI.WebControls.FileUpload Fupload) {

//文件上传函数

try

{

if (Fupload.HasFile)

{

//判断文件格式

string sExt = Fupload.FileName.Substring(stIndexOf(".")).ToLower();

if (!CheckValidExt(sExt))

{

lblMsg.Text = "(原图片文件格式不正确！支持的格式有[ " + AllowExt + " ])";

return;

}

//判断文件大小

int intFileLength = Fupload.PostedFile.ContentLength;

if (intFileLength > 1000 * 1000)

{

this.lblMsg.Text = "文件大于1M，不能上传！";

return;

}

Random ran = new Random();