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ASP.NET upload a file HtmlInputFile ControlWhen developing a web application it often may be necessary to allow a user to ‘send’ (upload) a file. With HtmlInputFile control the this seemingly complicated task is much easier than one would expect. The HtmlInputFile control is not listed in the toolbox by default but can be easily added using HTML in your page. In order to use the HtmlInputFile control the following form code must be added to your .aspx page:
The size and position of the controls can be what ever you desire. Once the HtmlInputFile code is added you can visually design its size and position. In the above code I have also included a label for the displaying of status information and a button that will actually execute the code for the uploading of the file selected with the HtmlInputFile.
The code to upload the file is simple:
Dim filename As String
' Extract the selected filename
filename = System.IO.Path.GetFileName(btnSelectFile.PostedFile.FileName)
' Set the label to display where the file will be saved – this could also be used to display the file size uploaded
lblStatus.Text = "Status: " & ROOTPATH & filename
' Save the file
btnSelectFile.PostedFile.SaveAs(ROOTPATH & filename)
' This calls a procedure that I had created that will display the contents of a directory in a table
ListDirectory()
End Sub
Private Sub ListDirectory()
Dim currentdir As New DirectoryInfo(ROOTPATH)
Dim files As FileInfo
Dim tr As TableRow
Dim tcFile As TableCell
Dim tcSize As TableCell
For Each files In currentdir.GetFiles()
tr = New TableRow
tcFile = New TableCell
tcSize = New TableCell
tcFile.Text = files.Name
tcSize.HorizontalAlign = HorizontalAlign.Right
tcSize.Text = FormatNumber(files.Length, 0, TriState.False, TriState.True, TriState.True)
tr.Cells.Add(tcFile)
tr.Cells.Add(tcSize)
tblFiles.Rows.Add(tr)
Next
End Sub
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