Want to delete the previous file automatically when new file is uploaded

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I have this uploader:-

XML

<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();

Posted 7-Feb-15 3:57am

Deepak Kanswal Sharma

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2 solutions

Solution 1

use..

C#

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[^]

Posted 7-Feb-15 4:11am

/\jmot

Updated 7-Feb-15 4:12am

v2

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Member 10110891 · Accepted Answer · 2015-02-07T06:31:00

Solution 2

Use this

C#

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.
:)

Posted 7-Feb-15 6:31am

Member 10110891

Comments

Deepak Kanswal Sharma 8-Feb-15 6:56am

Great dude!! That worked! Thanks a lot. ;)