想要在上传新文件时自动删除以前的文件 [英] Want to delete the previous file automatically when new file is uploaded

问题描述

我有这个上传者： -

 <  < span class =code-leadattribute> div     style   =  width：250px; margin：0px 0px 0px 150px; float：right; > ;  
 
 <   asp：FileUpload     ID   =  FileUpload1    runat   =  server    /  >  
 
 <   asp：按钮    ID   =  Button2    runat   =  server    onclick   =  Button2_Click  
   
                                  文字  = 保存文件    /  >  
 
 <   / div  >  

现在我想当我上传另一个文件时，先前的文件会被自动删除，这个新文件会被上传而不是旧文件。



这是我的代码（我只能制作上传代码...... :-(）



string str = @data source = DEEPAKSHARMA-PC\SQLEXPRESS;初始目录=新; integrated security = true;

SqlConnection con = new SqlConnection（str）;

con.Open（）;

string s = Server。 MapPath（doc /）+ f1.FileName;

f1.SaveAs（s）;



string quer =insert into doc values（'f1.FileName +'）;

SqlCommand cmd = new SqlCommand（quer，con）;

cmd.ExecuteNonQuery（）;

con.Close（）;

解决方案

使用此

  string  path = Server.MapPath（  filefolder / filename.extension）; 
  if （System.IO.File.Exists（path））
 {
 System.IO.File.Delete（路径）; 
} 

要么发送路径静态，要么填充它动态数据库。

：）

使用..

  string  rootFolderPath =  @  C： \\SomeFolder\\AnotherFolder\\FolderCOntainingThingsToDelete; 
  string  filesToDelete =  @  * DeleteMe * .DOC;  //  仅删除文件名中包含DeleteMe的DOC文件 
  string  [] fileList = System.IO.Directory.GetFiles（rootFolderPath，filesToDelete）; 
  foreach （字符串文件 in  fileList）
 {
 System.Diagnostics.Debug.WriteLine（file +  将被删除）; 
  //   System.IO.File.Delete（file）;  
} 

ref。

http://stackoverflow.com/questions/1620366/delete-files-from-directory-if-filename-contains-a-certain-word [< a href =http://stackoverflow.com/questions/1620366/delete-files-from-directory-if-filename-contains-a-certain-word\"target =_ blanktitle =New Window> ^ ]

http://stackoverflow.com/questions/1288718/how-to-delete-all-files-and-folders-in-a-directory [ ^ ]

< a href =http://stackoverflow.com/questions/14251220/how-to-delete-a-specific-file-from-folder-u sing-asp-net> http://stackoverflow.com/questions/14251220/how-to-delete-a-specific-file-from-folder-using-asp-net [ ^

I have this uploader:-

<div style="width:250px; margin:0px 0px 0px 150px; float:right;">

            <asp:FileUpload ID="FileUpload1" runat="server" />

            <asp:Button ID="Button2" runat="server" onclick="Button2_Click"

                Text="Save File" />

        </div>

Now I want when I upload another file the previous file gets deleted automatically and this new file is uploaded in place of old one.

This is my code (I can only make code for uploading... :-( )

string str=@"data source=DEEPAKSHARMA-PC\SQLEXPRESS; initial catalog=new; integrated security=true ";
SqlConnection con=new SqlConnection(str);
con.Open();
string s=Server.MapPath("doc/")+f1.FileName;
f1.SaveAs(s);

string quer = "insert into doc values('" + f1.FileName + "')";
SqlCommand cmd = new SqlCommand(quer, con);
cmd.ExecuteNonQuery();
con.Close();

解决方案

Use this

string path=Server.MapPath("filefolder/filename.extension");
if(System.IO.File.Exists(path))
{
 System.IO.File.Delete(path);
}

Either send the path static or populate it from database dynamically.
:)

use..

string rootFolderPath = @"C:\\SomeFolder\\AnotherFolder\\FolderCOntainingThingsToDelete";
string filesToDelete = @"*DeleteMe*.doc";   // Only delete DOC files containing "DeleteMe" in their filenames
string[] fileList = System.IO.Directory.GetFiles(rootFolderPath, filesToDelete);
foreach(string file in fileList)
{
    System.Diagnostics.Debug.WriteLine(file + "will be deleted");
//  System.IO.File.Delete(file);
}

ref.
http://stackoverflow.com/questions/1620366/delete-files-from-directory-if-filename-contains-a-certain-word[^]
http://stackoverflow.com/questions/1288718/how-to-delete-all-files-and-folders-in-a-directory[^]
http://stackoverflow.com/questions/14251220/how-to-delete-a-specific-file-from-folder-using-asp-net[^]

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