The controller:
[HttpGet]
public FileResult Get()
{
//execute sql
using (XLWorkbook wb = new XLWorkbook())
{
wb.Worksheets.Add(dt, "file");
using (MemoryStream stream = new MemoryStream())
{
wb.SaveAs(stream);
return File(stream.ToArray(), "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "Data.xlsx");
}
}
}
how i handle this to javascript to download it from page?
How about calling the fileresult url in a new page? Like;
window.open("/FileController/Get");
Browser will detect the FileResult and download will start.
Related
I have download PDF file(not to open) generated from controller method. file is getting opened in new separate window. I am generating MemoryStream at server side. I have to return it to client in same window, here I don't have to open, just download in the same client window.
below code I have tried -
Server-
public async Task<ActionResult> DownloadReport(string id, string reportType="")
{
var fileData = await GetReport(id, reportType);
// here fileData is MemoryStream
return File(fileData, "application/pdf");
}
html code -
#Html.ActionLink("Download", "DownloadReport","Files", new { id = "abc" },null)
Use Content-Disposition header
public async Task<ActionResult> DownloadReport(string id, string reportType="")
{
var fileData = await GetReport(id, reportType);
// here fileData is MemoryStream
Response.AddHeader("Content-Disposition", "attachment;filename=file.pdf");
return File(fileData, "application/pdf");
}
I would like to view a PDF file directly in my browser. I know this question is already asked but I haven't found a solution that works for me.
Here is my action's controller code so far:
public ActionResult GetPdf(string fileName)
{
string filePath = "~/Content/files/" + fileName;
return File(filePath, "application/pdf", fileName);
}
Here is my view:
#{
doc = "Mode_d'emploi.pdf";
}
<p>#Html.ActionLink(UserResource.DocumentationLink, "GetPdf", "General", new { fileName = doc }, null)</p>
When I mouse hover the link here is the link:
The problem with my code is that the pdf file is not viewed in the browser but I get a message asking me if I wand to open or save the file.
I know it is possible and my browser support it because I already test it with another website allowing me to view pdf directly in my browser.
For example, here is the link when I mouse hover a link (on another website):
As you can see there is a difference in the generated link. I don't know if this is useful.
Any idea how can I view my pdf directly in the browser?
The reason you're getting a message asking you to open or save the file is that you're specifying a filename. If you don't specify the filename the PDF file will be opened in your browser.
So, all you need to do is to change your action to this:
public ActionResult GetPdf(string fileName)
{
string filePath = "~/Content/files/" + fileName;
return File(filePath, "application/pdf");
}
Or, if you need to specify a filename you'll have to do it this way:
public ActionResult GetPdf(string fileName)
{
string filePath = "~/Content/files/" + fileName;
Response.AddHeader("Content-Disposition", "inline; filename=" + fileName);
return File(filePath, "application/pdf");
}
Instead of returning a File, try returning a FileStreamResult
public ActionResult GetPdf(string fileName)
{
var fileStream = new FileStream("~/Content/files/" + fileName,
FileMode.Open,
FileAccess.Read
);
var fsResult = new FileStreamResult(fileStream, "application/pdf");
return fsResult;
}
Change your code to this :
Response.AppendHeader("Content-Disposition","inline;filename=xxxx.pdf");
return File(filePath, "application/pdf");
If you read the file stored in database image column, you can use like this:
public ActionResult DownloadFile(int id)
{
using (var db = new DbContext())
{
var data =
db.Documents.FirstOrDefault(m => m.ID == id);
if (data == null) return HttpNotFound();
Response.AppendHeader("content-disposition", "inline; filename=filename.pdf");
return new FileStreamResult(new MemoryStream(data.Fisier.ToArray()), "application/pdf");
}
}
If you are using Rotativa package to generate PDF, Then don't put a name to file with FileName attribute like below example.
return new PartialViewAsPdf("_JcPdfGenerator", pdfModel);
Hope this is helpful to someone.
Although previous posts are often correct; I think most of them are not best practice!
I'd like to suggest to change action return types to FileContentResult and usereturn new FileContentResult(fileContent, "application/pdf"); at the end of action body.
Yes You Can do It Simply by redirecting . it ends extension like u need , .pdf ..
protected void OpenPdfPdf_Click(object sender, EventArgs e)
{
Response.Redirect("jun.pdf");
}
Or another Method ,its opens like .aspx page--
protected void OpenPdf_Click(object sender, EventArgs e)
{
string path = Server.MapPath("jun.pdf");
//or you want to load from url change path to
//string path="https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf";
WebClient client = new WebClient();
Byte[] buffer = client.DownloadData(path);
if (buffer != null)
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-length", buffer.Length.ToString());
Response.BinaryWrite(buffer);
}
}
For introduction, I have problem with communication between servicestack and application written in ember.js via REST, I am using ember-uploader component to upload a file to service stack.
View hbs:
<table class="table table-bordered table-hover">
{{file-upload}}
</table>
component in coffee script
ABC.FileUploadComponent = Ember.FileField.extend(
url: "/api/upload"
filesDidChange: (->
uploadUrl = #get("url")
console.log uploadUrl
files = #get("files")
test = { fileName: "test" }
uploader = Ember.Uploader.create(
url: uploadUrl
)
uploader.upload(files[0],test) unless Ember.isEmpty(files)
console.log files
return
).observes("files")
)
component in javascript
ABC.FileUploadComponent = Ember.FileField.extend({
url: "/api/upload",
filesDidChange: (function() {
var files, test, uploadUrl, uploader;
uploadUrl = this.get("url");
console.log(uploadUrl);
files = this.get("files");
test = {
fileName: "test"
};
uploader = Ember.Uploader.create({
url: uploadUrl,
data: test
});
if (!Ember.isEmpty(files)) {
uploader.upload(files[0], test);
}
console.log(files);
}).observes("files")
});
My service model:
namespace ABC.Service.ServiceModel
{
public class Upload
{
[Route("/upload")]
public class UploadRequest : IRequiresRequestStream
{
public System.IO.Stream RequestStream { set; get; }
public object FileName { set; get; }
}
public class UploadResponse
{
public int Successed { set; get; }
}
}
}
My Service Method
namespace ABC.Service.Service
{
public class UploadService : ServiceBase // Service base inherites from ServiceStack.Service
{
public Upload.UploadResponse Post(Upload.UploadRequest request)
{
var req = base.Request;
var reqThatIwant = request.FileName;
return new Upload.UploadResponse() { Successed = 1 };
}
}
}
and here is screen from watch :
So my question is, how I have to change the code to get data marked as "2" into Request object marked as "1" (marked on the screen)?
Handling Raw Request Stream
When you use IRequiresRequestStream you're saying you want to take over deserializing the Request and access the raw input HTTP Request Body as a Stream. As a result ServiceStack wont attempt to read from the Request body and instead inject the HTTP Request stream - in this case the only Request DTO parameters it will be able to populate are those on the /pathinfo or ?QueryString, e.g:
[Route("/upload/{FileName}")]
public class Upload : IRequiresRequestStream
{
public Stream RequestStream { set; get; }
public string FileName { set; get; }
}
Accessing FormData HTTP POSTs
But if the JavaScript component is sending you HTTP POST FormData (i.e. application/x-www-form-urlencoded or multipart/form-data) than it's very unlikely you want to treat it like a raw Request Stream but instead access the Request.FormData or Request.Files that were posted.
Handling File Upload examples
Based on your screenshot, the HTTP Request Content-Type is multipart/form-data which case you will most likely be able to access any uploaded files using Request.Files.
Some examples of accessing HTTP Uploaded Files are available in the Live Demos:
Imgur - Save uploaded files to a MemoryStream
public object Post(Upload request)
{
foreach (var uploadedFile in Request.Files
.Where(uploadedFile => uploadedFile.ContentLength > 0))
{
using (var ms = new MemoryStream())
{
uploadedFile.WriteTo(ms);
WriteImage(ms);
}
}
return HttpResult.Redirect("/");
}
Rest Files - Save to FileSystem
public void Post(Files request)
{
var targetDir = GetPath(request);
var isExistingFile = targetDir.Exists
&& (targetDir.Attributes & FileAttributes.Directory) != FileAttributes.Directory;
if (isExistingFile)
throw new NotSupportedException(
"POST only supports uploading new files. Use PUT to replace contents of an existing file");
if (!Directory.Exists(targetDir.FullName))
Directory.CreateDirectory(targetDir.FullName);
foreach (var uploadedFile in base.Request.Files)
{
var newFilePath = Path.Combine(targetDir.FullName, uploadedFile.FileName);
uploadedFile.SaveTo(newFilePath);
}
}
HTTP Benchmarks - Handle multiple and .zip uploaded files
public object Post(UploadTestResults request)
{
//...
foreach (var httpFile in base.Request.Files)
{
if (httpFile.FileName.ToLower().EndsWith(".zip"))
{
using (var zip = ZipFile.Read(httpFile.InputStream))
{
var zipResults = new List<TestResult>();
foreach (var zipEntry in zip)
{
using (var ms = new MemoryStream())
{
zipEntry.Extract(ms);
var bytes = ms.ToArray();
var result = new MemoryStream(bytes).ToTestResult();
zipResults.Add(result);
}
}
newResults.AddRange(zipResults);
}
}
else
{
var result = httpFile.InputStream.ToTestResult();
newResults.Add(result);
}
}
}
Any help is most welcomed and really appreciated.
I have an MVC action which retries a file content from a web service. This action is invoked from a Angular service (located in services.js) using $http.post(action, model), and the action is returning a FileContentResult object, which contains the byte array and the content type.
public ActionResult DownloadResults(DownloadResultsModel downloadResultsModel)
{
downloadResult = ... // Retrieving the file from a web service
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", downloadResult.FileName));
Response.BufferOutput = false;
return new FileContentResult(downloadResult.Contents, downloadResult.ContentType);
}
The issue I'm having is about the browser not performing the default behavior of handing a file (for example, prompting to open it, saving it or cancel). The action is completed successfully with having the content of the file and the file name (injected to the FileContentResult object), but there s no response from the browser.
When I'm replacing the post with $window.location.href, and construct the URI myself, I'm hitting the action and after it completes the browser is handling the file as expected.
Does anyone can think of any idea how to complete the 'post' as expected?
Thanks,
Elad
I am using below code to download the file, given that the file does exist on the server and client is sending server the full path of the file...
as per you requirement change the code to specify path on server itself.
[HttpGet]
public HttpResponseMessage DownloadFile(string filename)
{
filename = filename.Replace("\\\\", "\\").Replace("'", "").Replace("\"", "");
if (!char.IsLetter(filename[0]))
{
filename = filename.Substring(2);
}
var fileinfo = new FileInfo(filename);
if (!fileinfo.Exists)
{
throw new FileNotFoundException(fileinfo.Name);
}
try
{
var excelData = File.ReadAllBytes(filename);
var result = new HttpResponseMessage(HttpStatusCode.OK);
var stream = new MemoryStream(excelData);
result.Content = new StreamContent(stream);
result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = fileinfo.Name
};
return result;
}
catch (Exception ex)
{
return Request.CreateResponse(HttpStatusCode.ExpectationFailed, ex);
}
}
and then on client side in angular:
var downloadFile = function (filename) {
var ifr = document.createElement('iframe');
ifr.style.display = 'none';
document.body.appendChild(ifr);
ifr.src = document.location.pathname + "api/GridApi/DownloadFile?filename='" + escape(filename) + "'";
ifr.onload = function () {
document.body.removeChild(ifr);
ifr = null;
};
};
I am trying to save a html2canvas image to server side code in asp.net webmethod.For this i am trying to send parameters through jquery ajax click method.Every thing is fine on client side code as i am not getting any type of error or warning but at the same time i am not getting image at server side too.I am trying to figure out issue from longtime but not getting the way or the reason why is it happening.Here is my client side code..
$("#excel").on("click", function (e) {
e.preventDefault();
html2canvas($("#placeholder").get(0), {
onrendered: function (canvas) {
var img = canvas.toDataURL().replace(/^data[:]image\/(png|jpg|jpeg)[;]base64,/i, "");
$.ajax({
type: "POST",
url: "Default.aspx/MyMethod",
data: "img=" + img,
success: function (msg) {
alert("Data Saved: " + msg);
}
});
}
});
});
Please guys help me.I am totally struck into the situation.
Need a life savior.
Thanks in advance.
Here is my server side code..
[WebMethod]
public static void MyMethod(string img)
{
string fileNameWitPath = "D:/Kabir/custom_name.png";
using (FileStream fs = new FileStream(fileNameWitPath, FileMode.Create))
{
using (BinaryWriter bw = new BinaryWriter(fs))
{
byte[] data = Convert.FromBase64String(img);//convert from base64
bw.Write(data);
bw.Close();
}
}
}
This is my webservice code ..
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
// [System.Web.Script.Services.ScriptService]
public class WebService : System.Web.Services.WebService {
[WebMethod]
public static void MyMethod(string img)
{
string path = HttpContext.Current.Server.MapPath("/") + "Test.jpg";
//string fileNameWitPath = "D:\\Kabir\\custom_name.png";
using (FileStream fs = new FileStream(path, FileMode.Create))
{
using (BinaryWriter bw = new BinaryWriter(fs))
{
byte[] data = Convert.FromBase64String(img);//convert from base64
bw.Write(data);
bw.Close();
}
}
}
}
And this giving this error in firebug..
System.InvalidOperationException: MyMethod Web Service method name is not valid.
at System.Web.Services.Protocols.HttpServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)
Why is this error coming?
I was not able to get it to create an image by calling an ASPX webmethod. Once I moved the code to an ASMX web service, it created the image. Make sure you have permissions on the folder, and for Windows, the front-slashes (/) on your fileNameWitPath variable need to be back-slashes (\)
ASMX
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.ComponentModel;
using System.IO;
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
// <System.Web.Script.Services.ScriptService()> _
[System.Web.Services.WebService(Namespace = "http://tempuri.org/")]
[System.Web.Services.WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
public class WebService1 : System.Web.Services.WebService
{
[WebMethod()]
public void MyMethod(string img)
{
string path = HttpContext.Current.Server.MapPath("/") + "Test.jpg";
using (FileStream fs = new FileStream(path, FileMode.Create)) {
using (BinaryWriter bw = new BinaryWriter(fs)) {
byte[] data = Convert.FromBase64String(img);
bw.Write(data);
bw.Close();
}
}
}
}
Script
$("#excel").on("click", function (e) {
e.preventDefault();
html2canvas($("#placeholder").get(0), {
onrendered: function (canvas) {
var img = canvas.toDataURL().replace(/^data[:]image\/(png|jpg|jpeg)[;]base64,/i, "");
$.ajax({
type: "POST",
url: "WebService1.asmx/MyMethod",
data: "img=" + img,
success: function (msg) {
alert("Data Saved: " + msg);
}
});
}
});