I want to upload an image from the gallery or live pic (camera capture task) with some params; x = "some string", y = "some string", z = "some integer" and uploadimage = name of file tag in form.
Can anyone please help me?
Uploading image for WP8 was pain to setup. Many of the examples I follow was outdated and this took me days to research and finally got one to work. There are a few ways to upload:
1) Convert the image to a string and then you can send the image converted string via HTTP request. I've used this approach for Android, but haven't tried it for WP.
2) Upload the image via FTP and the text data via HTTP.
You have 3 choices to upload any File to server.
Convert file into Stream - recommend way
Convert file into ByteArray
Convert file into String
After that you can use HttpClient package make a POST request to server. Here is the code to demonstrate FileUpload by converting it into Stream.
Code:
public async void methodToUploadFile()
{
StorageFile file = await StorageFile.GetFileFromPathAsync("Assets/MyImage.png");
// var fileBytes = await GetBytesAsync(file);
HttpClient client = new HttpClient();
// give the server URI here
Uri requestUri = new Uri("Full Server URI", UriKind.Absolute);
MultipartFormDataContent formdata = new MultipartFormDataContent();
formdata.Add(new StringContent("some string"), "x");
formdata.Add(new StringContent("some string"), "y");
formdata.Add(new StringContent("some integer"), "z");
formdata.Add(new StreamContent(await file.OpenStreamForReadAsync()), "file", "MyImage.png");
// formdata.Add(new ByteArrayContent(fileBytes), "file", "MyImage.png");
// Make a POST request here
var res = await client.PostAsync(requestUri, formdata);
}
Hope this helps..!
Related
I have a problem that is still unclear: I am trying to upload an image from Xamarin via the API. I check the code for the OK message, but the image can't be uploaded to the Server, I tried to test the API on Postman, swagger, it works fine. I checked read_external_storage and write_external_storage
async void pickimg_Tapped(System.Object sender, EventArgs e)
{
var pickResult = await MediaPicker.PickPhotoAsync();
var content = new MultipartFormDataContent();
content.Add(new StreamContent(await pickResult.OpenReadAsync()), "file", pickResult.FileName);
var httpClient = new HttpClient();
var responses = await httpClient.PostAsync("https://api.com/api/UploadFileFeeds", content);
lb_status.Text = responses.StatusCode.ToString();
}
I check the responses value returns OK. However I can't find the image on the Server's folder. Note that when I test on Postman vs swagger, the image is saved on the Server. What did I do wrong? Ask for a solution from everyone
I am trying to download a 1GB file from blob storage into the client. I used before Memory Stream and I get OutOfMemory exception.
now I am trying to open a read stream from the blob and send it directly to the client.
[HttpGet]
[ResponseType(typeof(HttpResponseMessage))]
public async Task<HttpResponseMessage> DownloadAsync(string file)
{
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
var stream = await blob.OpenReadAsync("container", file);
result.Content = new StreamContent(stream);
return result;
}
The file is downloaded correctly, but the problem is: The code download the complete stream in the client, then the client sees the downloaded file.
I wanted the client to see the file as being downloaded, so the user knows that he is downloading something. Not just blocking the request and wait till it finished.
I am using FileSaver in Angular2:
this.controller.download('data.zip').subscribe(
data => {
FileSaver.saveAs(data, 'data.zip');
});
Has anybody an idea how to fix it?
Thank you!
To fix it you'd need to use the following javascript code instead:
var fileUri = "http://localhost:56676/api/blobfile"; //replace with your web api endpoint
var link = document.createElement('a');
document.body.appendChild(link);
link.href = fileUri;
link.click();
And then in your backend, make it like so:
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
var stream = await blob.OpenReadAsync("container", file);
result.Content = new StreamContent(stream);
result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = "data.zip"
};
result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
return result;
I had the same problem.
The Solution I sorted out was -
First thing, the expected behaviour can occur only when client tries to download the file from blob and usually I prefer downloading the file from the client itself.
As in your case, try to get file blob uri and do some operations as below to open file in browser using Angular Router or simply window.location.href.
window.location.href = “https://*/filename.xlsx”
This worked for me.
I want my bot to send a PDF file to the user. I have the PDF as a base64 string and tried to send it through an attachment:
Attachment attachment1 = new Attachment();
attachment1.Name = "name.pdf";
attachment1.ContentType = "application/pdf";
attachment1.ContentUrl = "data:application/pdf;base64," + base64String;
var m = context.MakeMessage();
m.Attachments.Add(attachment1);
m.Text = "File";
await context.PostAsync(m);
Within the emulator, it just doesn't work but in the channels Telegram and Facebook (which I need), the bot just outputs an error...
Has someone already succeed in it?
Note: Using an HTTP address works fine, but I need to use the base64 string
As this method in botframework call sendDocument method of Telegram, and this method in its document property get http url or a file_id, so you can't pass base64String to this method as a valid document type.
You can follow the valid type of the document passing into the telegram in this link (also, see the following image).
The pdf file must be embedded resource. Hope it help.
if (this.channelid == "telegram")
{
var url = string.Format("https://api.telegram.org/bot{0}/sendDocument", Settings.tokentelegram);
Assembly _assembly;
Stream file;
using (var form = new MultipartFormDataContent())
{
form.Add(new StringContent(this.chat_id, Encoding.UTF8), "chat_id");
_assembly = Assembly.GetExecutingAssembly();
file = _assembly.GetManifestResourceStream("Namespace.FolderResourses.name.pdf");
form.Add(new StreamContent(file), "document", "name.pdf");
using (var client = new HttpClient())
{
await client.PostAsync(url, form);
}
}
}
We are trying to upload image to Twitter via silverlight code in WP7. We are able to post the message but not the image.
We tried all including download of their library but not getting the hint.
In following link,
https://dev.twitter.com/docs/api/1/post/statuses/update_with_media
there is one point which we are not able to set.
"Unlike POST statuses/update, this method expects raw multipart data. Your POST request's Content-Type should be set to multipart/form-data with the media[] parameter "
I am not getting it how to put it.
Can anyone please guide me or provide sample for image upload?
If your photo is called LoadedPhoto, you could create a memory stream from it
MemoryStream ms = new MemoryStream();
LoadedPhoto.SaveJpeg(ms, LoadedPhoto.PixelWidth, LoadedPhoto.PixelHeight, 0, 100);
Create OAuthCredentials object according to the authentication details you have acquired
var credentials = new OAuthCredentials
{
Type = OAuthType.ProtectedResource,
SignatureMethod = OAuthSignatureMethod.HmacSha1,
ParameterHandling = OAuthParameterHandling.HttpAuthorizationHeader,
ConsumerKey = Common.TwitterSettings.ConsumerKey,
ConsumerSecret = Common.TwitterSettings.ConsumerKeySecret,
Token = file.AccessToken,
TokenSecret = file.AccessTokenSecret,
Version = "1.0"
};
Create a RestClient and a RestRequest
var restClient = new RestClient
{
Authority = "https://upload.twitter.com"
};
var restRequest = new RestRequest
{
Credentials = credentials,
Path = "/1/statuses/update_with_media.xml",
Method = Hammock.Web.WebMethod.Post
};
Set the stream position to 0
ms.Position = 0;
Add fields to RestRequest
restRequest.AddField("status", message);
restRequest.AddFile("media[]", "ScreenShot.png", ms, "image/jpeg");
And then begin request
restClient.BeginRequest(restRequest, callback);
callback is a callback method for the request.
Taken from my blog post, see there for more details if you're interested.
In web App, there is an Input Tag to upload file. In windows phone, It seems it is different. I need hlep on writing HttpWebRequest code to upload file to remote server ( if possible to skydrive). Can you show me how to solve this problem.
1) Upload file from Windows phone.
2) How would I handle the uploaded file on server-side If I use Asp.net.
Thanks.
Something like this. I suggest you ask about how to handle it on the server side in its own question with a different set of tags.
var uri = "http://example.com/some_applette"
var request = HttpWebRequest.create(uri);
request.Method = "POST";
request.ContentType = "image/jpeg"; // Change to whatever you're uploading.
request.BeginGetRequestStream((result1) =>
{
using (Stream stream = request.EndGetRequestStream(result1))
{
// Bytes contains the data to upload.
stream.Write(bytes, 0, bytes.Length);
}
request.BeginGetResponse((result2) =>
{
var response = request.EndGetResponse(result2);
// Optionally handle the response.
var responseStream = response.GetResponseStream();
...
}
}, null);