How to Download in in file

barathi raja

10y3.7kVisual Basic .NET

Download for pdf,documents,and video and audio use c# use in my project use download any file ...

10 Replies

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Rajesh Gami8y ago
Hello barathi

please refer this code for Download Video.
//Create a stream for the file
    Stream stream = null;

    //This controls how many bytes to read at a time and send to the client
    int bytesToRead = 10000;

    // Buffer to read bytes in chunk size specified above
    byte[] buffer = new Byte[bytesToRead];

    // The number of bytes read
    try
    {
      //Create a WebRequest to get the file
      HttpWebRequest fileReq = (HttpWebRequest) HttpWebRequest.Create(url);

      //Create a response for this request
      HttpWebResponse fileResp = (HttpWebResponse) fileReq.GetResponse();

      if (fileReq.ContentLength > 0)
        fileResp.ContentLength = fileReq.ContentLength;

        //Get the Stream returned from the response
        stream = fileResp.GetResponseStream();

        // prepare the response to the client. resp is the client Response
        var resp = HttpContext.Current.Response;

        //Indicate the type of data being sent
        resp.ContentType = "application/octet-stream";

        //Name the file
        resp.AddHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
        resp.AddHeader("Content-Length", fileResp.ContentLength.ToString());

        int length;
        do
        {
            // Verify that the client is connected.
            if (resp.IsClientConnected)
            {
                // Read data into the buffer.
                length = stream.Read(buffer, 0, bytesToRead);

                // and write it out to the response's output stream
                resp.OutputStream.Write(buffer, 0, length);

                // Flush the data
                resp.Flush();

                //Clear the buffer
                buffer = new Byte[bytesToRead];
            }
            else
            {
                // cancel the download if client has disconnected
                length = -1;
            }
        } while (length > 0); //Repeat until no data is read
    }
    finally
    {
        if (stream != null)
        {
            //Close the input stream
            stream.Close();
        }
    }
Rajesh Gami8y ago
try this code for download pdf file.
#region Export PDF
       public async Task ExportPDF()
       {
           //student list
           //var dataList = GetStudentList();
           var users = _context.TEntity.Select(u => new Employee
           {
               Id = u.Id,
               Name = u.Name,
               Address = u.Address,
               Birthdate = u.Birthdate,
               Gender = u.Gender,
               Email = u.Email,
               Designation = u.Designation,
               Salary = u.Salary


           }).ToList();

           if (users == null) return null;
           //column Header name
           var columnsHeader = new List<string>{
               "S/N",
               "Name",
               "Address",
               "Birthdate",
               "Gender",
               "Email",
               "Designation",
               "Salary"
           };
           var filecontent = ExportPDF(users, columnsHeader, "TEntity");
           return File(filecontent, "application/pdf", "Employee.pdf"); ;
       }
       #endregion
       #region Helpers of Export PDF
       private byte[] ExportPDF(List dataList, List<string> columnsHeader, string heading)
       {

           var document = new Document();
           var outputMS = new MemoryStream();
           var writer = PdfWriter.GetInstance(document, outputMS);
           document.Open();
           var font5 = FontFactory.GetFont(FontFactory.HELVETICA, 11);

           document.Add(new Phrase(Environment.NewLine));

           //var count = typeof(UserListVM).GetProperties().Count();
           var count = columnsHeader.Count;
           var table = new PdfPTable(count);
           float[] widths = new float[] { 2f, 5f, 5f, 5f, 3f, 6f, 4f, 3f };

           table.SetWidths(widths);

           table.WidthPercentage = 100;
           var cell = new PdfPCell(new Phrase(heading));
           cell.Colspan = count;

           for (int i = 0; i < count; i++)
           {
               var headerCell = new PdfPCell(new Phrase(columnsHeader[i], font5));
               headerCell.BackgroundColor = BaseColor.Gray;
               table.AddCell(headerCell);
           }

           var sn = 1;
           foreach (var item in dataList)
           {
               table.AddCell(new Phrase(sn.ToString(), font5));
               table.AddCell(new Phrase(item.Name, font5));
               table.AddCell(new Phrase(item.Address, font5));
               table.AddCell(new Phrase(item.Birthdate.ToString(), font5));
               table.AddCell(new Phrase(item.Gender, font5));
               table.AddCell(new Phrase(item.Email, font5));
               table.AddCell(new Phrase(item.Designation, font5));
               table.AddCell(new Phrase(item.Salary.ToString(), font5));

               sn++;
           }

           document.Add(table);
           document.Close();
           var result = outputMS.ToArray();

           return result;
       }

       #endregion
step 2: Now in list view
@model IEnumerable

@{
    ViewData["Title"] = "Index";
}

Index

"~/js/pdf.js">

    class="btn btn-default" asp-action="Create">Create New

    class="btn btn-default" style="float:right;" asp-action="ExportPDF">Create PDF


class="table">



                    @Html.DisplayNameFor(model => model.Id)


                    @Html.DisplayNameFor(model => model.Name)


                    @Html.DisplayNameFor(model => model.Address)


                    @Html.DisplayNameFor(model => model.Birthdate)


                    @Html.DisplayNameFor(model => model.Gender)


                    @Html.DisplayNameFor(model => model.Email)


                    @Html.DisplayNameFor(model => model.Designation)


                    @Html.DisplayNameFor(model => model.Salary)


                    @Html.DisplayNameFor(model => model.Resume)


                    @Html.DisplayNameFor(model => model.Photo)





@foreach (var item in Model) {


                @Html.DisplayFor(modelItem => item.Id)


                @Html.DisplayFor(modelItem => item.Name)


                @Html.DisplayFor(modelItem => item.Address)


                @Html.DisplayFor(modelItem => item.Birthdate)


                @Html.DisplayFor(modelItem => item.Gender)


                @Html.DisplayFor(modelItem => item.Email)


                @Html.DisplayFor(modelItem => item.Designation)


                @Html.DisplayFor(modelItem => item.Salary)


                @Html.DisplayFor(modelItem => item.Resume)


                @Html.DisplayFor(modelItem => item.Photo)


                @Html.ActionLink("Edit", "Edit", new { id=item.Id }) |
                @Html.ActionLink("Details", "Details", new { id = item.Id }) |
                @Html.ActionLink("Delete", "Delete", new { id = item.Id })


}
thanx
Rafnas T P8y ago
hi,
you can download file giving url
try below code
code will dowload file from given url and in red color you have to mention filename with extention
using (var client = new WebClient())
{
    client.DownloadFile("http://example.com/file/song/a.pdf", "a.pdf");//download pdf
}
Jyothi Augustine8y ago
error in this line

Response.Clear();
Jyothi Augustine8y ago
i want to download any file from folder dotnet windows appilication using c#
[email protected] send me plz
Rajeesh Menoth10y ago
Hi,
Try this code :
protectedvoidlnkfilepath_Click(objectsender,EventArgse)//urlinkbutton
{
stringfilename=lnkfilepath.Text;
stringFilpath=Server.MapPath(“~/Attachments/”+filename);
DownLoad(Filpath);
}
publicvoidDownLoad(stringFName)
{
stringpath=FName;
System.IO.FileInfofile=newSystem.IO.FileInfo(path);
if(file.Exists)
{
Response.Clear();
Response.AddHeader(“Content-Disposition”,“attachment;filename=”+file.Name);
Response.AddHeader(“Content-Length”,file.Length.ToString());
Response.ContentType=“application/octet-stream”;//downloadalltypesoffiles..
Response.WriteFile(file.FullName);
Response.End();
}
else
{
Response.Write(“Thisfiledoesnotexist.”);
}
}
Reference :
https://rajeeshmenoth.wordpress.com/2014/06/25/how-to-download-files-using-asp-net-c/
Munesh Sharma10y ago
http://www.aspdotnet-suresh.com/2012/02/saveupload-files-in-folder-and-download.html
Manoj Bhoir10y ago
Hi,

You can write code like this :

System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.ClearContent();
response.Clear();
response.ContentType = "APPLICATION/OCTET-STREAM";
response.AddHeader("Content-Disposition", "attachment; filename=" + yourfileName + ";");
response.TransmitFile(Server.MapPath("FileName"));
response.Flush();
response.End();

Check this links for how to implement file download.

http://www.aspdotnet-suresh.com/2012/02/saveupload-files-in-folder-and-download.html
http://www.codeproject.com/Tips/185886/File-Upload-and-Download-in-ASP-NET
http://stackoverflow.com/questions/18477398/asp-net-file-download-from-server
Nilesh Sawardekar10y ago
try this
http://www.csharp-examples.net/download-files/
Nitin10y ago
Use the following Code
protected void Download_Click(object sender, EventArgs e)
{
try
{
string strURL = txtFileName.Text;
WebClient req = new WebClient();
HttpResponse response = HttpContext.Current.Response;
response.Clear();
response.ClearContent();
response.ClearHeaders();
response.Buffer = true;
response.AddHeader("Content-Disposition", "attachment;filename=\"" + Server.MapPath(strURL) + "\"");
byte[] data = req.DownloadData(Server.MapPath(strURL));
response.BinaryWrite(data);
response.End();
}
catch (Exception ex)
{
}
}

How to Download in in file

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