Upload Files to Dynamic Folders using C# and VB.Net in ASP.Net

Hey irshad1231,

Please refer below sample.

HTML

<div>
    <asp:FileUpload ID="FileUpload1" runat="server" />
    <hr />
    <asp:TextBox runat="server" ID="txtPath" />
    <asp:Button ID="btnUpload" Text="Upload" runat="server" OnClick="UploadFile" />
    <br />
    <asp:Label ID="lblMessage" ForeColor="Green" runat="server" />
</div>

Namespaces

C#

using System.IO;

VB.Net

Imports System.IO

Code

C#

protected void UploadFile(object sender, EventArgs e)
{
    string folderPath = Server.MapPath("~/" + txtPath.Text);
    if (!Directory.Exists(folderPath))
    {
        Directory.CreateDirectory(folderPath);
    }
    FileUpload1.SaveAs(folderPath + "/" + Path.GetFileName(FileUpload1.FileName));
    lblMessage.Text = Path.GetFileName(FileUpload1.FileName) + " has been uploaded." + txtPath.Text;
}

VB.Net

Protected Sub UploadFile(ByVal sender As Object, ByVal e As EventArgs)
    Dim folderPath As String = Server.MapPath("~/" & txtPath.Text)
    If Not Directory.Exists(folderPath) Then
        Directory.CreateDirectory(folderPath)
    End If
    FileUpload1.SaveAs(folderPath & "/" & Path.GetFileName(FileUpload1.FileName))
    lblMessage.Text = Path.GetFileName(FileUpload1.FileName) & " has been uploaded." & txtPath.Text
End Sub

Screenshot