怎么用c#在WEB上实现文件的上传功能？HTTP即可！

给我email,最大4G的文件,很快

MSDN中就有代码：ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.2052/cpgenref/html/cpconhtmlinputfilecontrol.htm

bool checkexist(string path)
{
FileInfo fi=new FileInfo(path);
if(fi.Exists) return true;
else return false;

}

void onupload(object sender, System.EventArgs e)
{
if(this.fileUpload.PostedFile.ContentLength!=0)
{
string filepath;
string filename;
string [] temp;
filename=fileUpload.PostedFile.FileName;
temp=filename.Split( '\\');
filename=temp[(temp.Length)-1];
filepath = "c:\\temp\\" + filename;
if(checkexist(filepath))
{
this.Label1.Text="duplicate filename exists!";
return; }
fileUpload.PostedFile.SaveAs(filepath);
Label1.Text="thank u! "+this.tb.Value;

return;
}
Label1.Text="no valid file!";

}

<%@page language="C#" debug="true"%>
<HTML>
<HEAD>
<TITLE>
</TITLE>
</HEAD>
<BODY>
<script language="C#" runat="Server">
//Event Handler for the upload button
void UploadFile(object Sender,EventArgs E)
{
if (File1.PostedFile !=null) //Checking for valid file
{
// PostedFile.FileName gives the entire path.Use Substring function to rip of the filename.
string StrFileName = File1.PostedFile.FileName.Substring(File1.PostedFile.FileName.LastIndexOf("\\") + 1) ;
string StrFileType = File1.PostedFile.ContentType ;
int IntFileSize =File1.PostedFile.ContentLength;
//Checking for the file length
if (IntFileSize <=0)
Response.Write(" <font color='Red'>Uploading of file " + StrFileName + " failed </font>");
else
{
File1.PostedFile.SaveAs(Server.MapPath(".\\" + StrFileName));
Response.Write( "<font color='green'>Your file " + StrFileName + " of type " + StrFileType + " and size " + IntFileSize.ToString() + " was uploaded successfully</font>");
}
}
}
</script>
<H2 align="center">File uploading in ASP.Net using C# - Demo</H2>

<form id="FrmFileUploadDemo" name="FrmFileUploadDemo" method="post" enctype="multipart/form-data" runat="server">
<TABLE align="center" bgcolor="lightyellow">
<TR>
<TD>
Select a file to upload <input type="file" id="File1" name="File1" runat="server">
</TD>
<TR>
<TR>
<TD align="center">
<input type=button value="Upload" runat="server" id="CmdUpload" onserverclick="UploadFile" />
</TD>
</TR>
</TABLE>
</form>
</BODY>
</HTML>

http://dotnet.aspx.cc/ShowDetail.aspx?id=58EA3515-36F2-4FD9-AC89-EAF49F59816C

哈哈，给一份，
[email protected]

html
<input type="file" runat="server" id="file1">c#
if (file1.PostedFile.ContentLength > 0)
file1.PostedFile.SaveAs(filename);

//判断是否存在同名文件
public static bool IsExists(string _FileName)
{
    bool boolReturn = false;
    FileInfo fi = new FileInfo(_FileName);
    if(fi.Exists)
    {
        boolReturn = true;
    }    return boolReturn;
}
using System;
using System.IO;
using System.Web;
using System.Web.UI;
using GL.ProjectHelper.CommonWay;namespace ProjectHelper.ControlHelper
{
/// <summary>
/// Summary description for GInputFile.
/// </summary>
public sealed class InputFile
{
#region Property Fields private static HttpPostedFile _PostedFile;
public static HttpPostedFile PostedFile
{
get
{
return _PostedFile;
}
set
{
_PostedFile = value;
}
} public static string ContentType
{
get
{
return PostedFile.ContentType;
}
} public static string FileName
{
get
{
return PostedFile.FileName;
}
} public static string SaveName
{
get
{
return DateTime.Now.ToString("yyyyMMddHHmmss") + GString.GetRandom(6) + Path.GetExtension(FileName);
}
} #endregion /// <summary>
/// 返回存储路径
/// </summary>
/// <param name="p">页面对象</param>
/// <param name="strFileName">文件名</param>
/// <returns>服务器端存储路径</returns>
private static string GetSavePath(Page p, string strFolder)
{
string strPath = p.Server.MapPath("/" + strFolder); if(!Directory.Exists(strPath))
{
Directory.CreateDirectory(strPath);
} return strPath + "\\" + SaveName;
} /// <summary>
/// 保存文件
/// </summary>
/// <param name="strFolder">文件夹名称</param>
/// <returns>保存成功？</returns>
public static bool SaveAs(Page p, string strFolder)
{
bool boolReturn = false;
if(PostedFile.ContentLength > 0)
{
PostedFile.SaveAs(GetSavePath(p, strFolder));
boolReturn = true;
} return boolReturn;
}
}
}

调试易

怎么用c#在WEB上实现文件的上传功能？HTTP即可！

解决方案 »