Upload a file in asp.net

Add the enctype="multipart/form-data" name-value attribute to the <form> tag as follows:

<form id="Form1" method="post" enctype="multipart/form-data" runat="server">

Private Sub btnUpload_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpload.Click

If Not MyFile.PostedFile Is Nothing And MyFile.PostedFile.ContentLength > 0 Then

Dim fn As String = System.IO.Path.GetFileName(MyFile.PostedFile.FileName)

Dim strSaveLocation As String = Server.MapPath("Upload") & "\" & fn

Dim index = fn.LastIndexOfAny(".")

Dim GetExtension = fn.Substring(index + 1)

If (UCase(GetExtension) = "TXT") Or (UCase(GetExtension) = "DOC") Then

MyFile.PostedFile.SaveAs(strSaveLocation)

lblMessage.Text = "File Has Been Uploaded Successfully."

Else

lblMessage.Text = "Incorrect File format."

End If

Else

lblMessage.Text = "please select a file to upload."

End If

End Sub

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