Why base64 image is big ? xamarin forms - xamarin

Question

I am facing one error sometimes, when I try get a picture from user gallery.
I get the picture in a Stream object, convert it to a base64 and I send it using a post function.
Sometimes The program says that the image path is big and, because of that, its not possible send the url.
I heard that its cause the image size but I am not sure about it...
Does someone know what really causes a Big base64 string? How can I solve that?

Answer 1

You could follow something similar to this:
http://jamessdixon.wordpress.com/2013/10/01/handling-images-in-webapi/
Maybe you need make some change in your web api like this:
[HttpPost]
public HttpResponseMessage UploadImage(int ID)
{
var result = new HttpResponseMessage(HttpStatusCode.OK);
if (Request.Content.IsMimeMultipartContent())
{
Request.Content.LoadIntoBufferAsync().Wait();
Request.Content.ReadAsMultipartAsync(new MultipartMemoryStreamProvider()).ContinueWith((task) =>
{
MultipartMemoryStreamProvider provider = task.Result;
foreach (HttpContent content in provider.Contents)
{
Stream stream = content.ReadAsStreamAsync().Result;
Image image = Image.FromStream(stream);
var testName = content.Headers.ContentDisposition.Name;
String filePath = HostingEnvironment.MapPath("~/Content/");
String fullPath = Path.Combine(filePath, ID.ToString()+".jpg");
image.Save(fullPath);
}
});
return result;
}
else
{
throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotAcceptable, "This request is not properly formatted"));
}
}
After making sure your api web works well you should change from Stream to byte[]
In your Xamarin code try this:
public async Task PostItem(String Controller, String Method, int ID, byte[] item)
{
using (var client = CreateClient ()) {
var da = new ByteArrayContent(item);
try{
var multi = new MultipartContent();
multi.Add(da);
var response = await client.PostAsync (Controller + "/" +Method + "/?ID=" +ID, multi);
}catch(Exception ex)
{
Console.Write(ex.Message);
}
}
}
For more infomation see MultipartContent class documentation