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How to upload and download files using asp net and c# Part 139

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• published: 11 Aug 2013
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Text version of the video http://csharp-video-tutorials.blogspot.com/2013/08/how-to-upload-and-download-files-using.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-139-upload-and-download-files.html All ASP .NET Text Articles http://csharp-video-tutorials.blogspot.com/p/free-aspnet-video-tutorial.html All ASP .NET Slides http://csharp-video-tutorials.blogspot.com/p/aspnet-slides.html ASP.NET Playlist https://www.youtube.com/playlist?list=PL4cyC4G0M1RQcB4IYS_zwkyBwMyx5AnDM All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort;=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video, we will discuss 1. Uploading files 2. Displaying the list of files that are already uploaded 3. Downloading files When the files are uploaded, they should be uploaded to a folder on the web server. In our case, we will be uploading to "Data" folder. WebForm1.aspx code: [div style="font-family:Arial"] [asp:FileUpload ID="FileUpload1" runat="server" /] [asp:Button ID="Button1" runat="server" Text="Upload" OnClick="Button1_Click" /] [br /] [br /] [asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowCommand="GridView1_RowCommand" BackColor="White" BorderColor="#CC9966" BorderStyle="None" BorderWidth="1px" CellPadding="4"] [Columns] [asp:TemplateField HeaderText="File" ShowHeader="False"] [ItemTemplate] [asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandArgument='[%# Eval("File") %]' CommandName="Download" Text='[%# Eval("File") %]'] [/asp:LinkButton] [/ItemTemplate] [/asp:TemplateField] [asp:BoundField DataField="Size" HeaderText="Size in Bytes" /] [asp:BoundField DataField="Type" HeaderText="File Type" /] [/Columns] [FooterStyle BackColor="#FFFFCC" ForeColor="#330099" /] [HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" /] [PagerStyle BackColor="#FFFFCC" ForeColor="#330099" HorizontalAlign="Center" /] [RowStyle BackColor="White" ForeColor="#330099" /] [SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" /] [SortedAscendingCellStyle BackColor="#FEFCEB" /] [SortedAscendingHeaderStyle BackColor="#AF0101" /] [SortedDescendingCellStyle BackColor="#F6F0C0" /] [SortedDescendingHeaderStyle BackColor="#7E0000" /] [/asp:GridView] [/div] WebForm1.aspx.cs code: protected void Button1_Click(object sender, EventArgs e) { if (FileUpload1.HasFile) { string fileName = FileUpload1.FileName; FileUpload1.PostedFile .SaveAs(Server.MapPath("~/Data/") + fileName); } DataTable dt = new DataTable(); dt.Columns.Add("File"); dt.Columns.Add("Size"); dt.Columns.Add("Type"); foreach (string strfile in Directory.GetFiles(Server.MapPath("~/Data"))) { FileInfo fi = new FileInfo(strfile); dt.Rows.Add(fi.Name, fi.Length.ToString(), GetFileTypeByExtension(fi.Extension)); } GridView1.DataSource = dt; GridView1.DataBind(); } private string GetFileTypeByExtension(string fileExtension) { switch (fileExtension.ToLower()) { case ".docx": case ".doc": return "Microsoft Word Document"; case ".xlsx": case ".xls": return "Microsoft Excel Document"; case ".txt": return "Text Document"; case ".jpg": case ".png": return "Image"; default: return "Unknown"; } } protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e) { if (e.CommandName == "Download") { Response.Clear(); Response.ContentType = "application/octect-stream"; Response.AppendHeader("content-disposition", "filename=" + e.CommandArgument); Response.TransmitFile(Server.MapPath("~/Data/") + e.CommandArgument); Response.End(); } } Please make sure to include the following using declarations in the code behind file. using System.IO; using System.Data; Make sure to replace [ with LESSTHAN and ] with GREATERTHAN symbol.