收藏的asp.net文件上傳類源碼
2024-07-10 13:14:21
供稿：網友
namespace Wmj
{
public class MyUpload
{
private System.Web.HttpPostedFile postedFile=null;
private string savePath="";
private string extension="";
private int fileLength=0;
//顯示該組件使用的參數信息
public string Help
{
get{
string helpstring;
helpstring="<font size=3>MyUpload myUpload=new MyUpload(); //構造函數";
helpstring+="myUpload.PostedFile=file1.PostedFile;//設置要上傳的文件";
helpstring+="myUpload.SavePath=/"e:///";//設置要上傳到服務器的路徑，默認c://";
helpstring+="myUpload.FileLength=100; //設置上傳文件的最大長度，單位k，默認1k";
helpstring+="myUpload.Extension=/"doc/";設置上傳文件的擴展名，默認txt";
helpstring+="label1.Text=myUpload.Upload();//開始上傳，并顯示上傳結果</font>";
helpstring+="<font size=3 color=red>Design By WengMingJun 2001-12-12 All Right Reserved!</font>";
return helpstring;
}
}
public System.Web.HttpPostedFile PostedFile
{
get
{
return postedFile;
}
set
{
postedFile=value;
}
}
public string SavePath
{
get
{
if(savePath!="") return savePath;
return "c://";
}
set
{
savePath=value;
}
}
public int FileLength
{
get
{
if(fileLength!=0) return fileLength;
return 1024;
}
set
{
fileLength=value*1024;
}
}
public string Extension
{
get
{
if(extension!="") return extension;
return "txt";
}
set
{
extension=value;
}
}
public string PathToName(string path)
{
int pos=path.LastIndexOf("//");
return path.Substring(pos+1);
}
public string Upload()
{
if(PostedFile!=null)
{
try{
string fileName=PathToName(PostedFile.FileName);
if(!fileName.EndsWith(Extension)) return "You must select "+Extension+" file!";
if(PostedFile.ContentLength>FileLength) return "File too big!";
PostedFile.SaveAs(SavePath+fileName);
return "Upload File Successfully!";
}
catch(System.Exception exc)
{return exc.Message;}
}
return "Please select a file to upload!";
}
}
}
用csc /target:Library Wmj.cs 編譯成dll供以后多次調用
調用舉例
<%@page language="C#" runat="server"%>
<%@import namespace="Wmj"%>
<script language="C#" runat="server">
void Upload(object sender,EventArgs e)
{
MyUpload myUpload=new MyUpload();
// label1.Text=myUpload.Help;
myUpload.PostedFile=file1.PostedFile;
myUpload.SavePath="e://";
myUpload.FileLength=100;
label1.Text=myUpload.Upload();
}
</script>
<form enctype="multipart/form-data" runat="server">
<input type="file" id="file1" runat="server"/>
<asp:Button id="button1" Text="Upload" OnClick="Upload" runat="server"/>
<asp:Label id="label1" runat="server"/>
</form>
