Agfdhyk

I recently followed these tutorials by Ahsan Siddique

Developing RESTful API in ASP.Net With Azure Database.

Part 1
https://www.c-sharpcorner.com/article/creating-sql-database-in-azure-portal/

part 2
https://www.c-sharpcorner.com/article/developing-restful-api-in-asp-net-with-add-method/

Part 3
https://www.c-sharpcorner.com/article/developing-restful-apis-in-asp-net-with-retrieve-update-and-delete-functions/

Consuming RESTful API in Xamarin.Android

part 4
https://www.c-sharpcorner.com/article/consuming-restful-apis-in-xamarin-android/

I managed to get all the codes to work but I got stuck at the part where i'm trying to pass the base64 string to the web api. The tutorial didn't have the portion that I got stuck at. I tested my POST API on Postman and I get this error message, "HTTP Error 414. The request URL is too long."

Below you can see a portion of my codes:

public String BitmapToBase64(Bitmap bitmap)

{

    //Java.IO.ByteArrayOutputStream byteArrayOutputStream = new Java.IO.ByteArrayOutputStream();

    MemoryStream memStream = new MemoryStream();

    bitmap.Compress(Bitmap.CompressFormat.Jpeg, 100, memStream);

    byte byteArray = memStream.ToArray();

    return Base64.EncodeToString(byteArray, Base64Flags.Default);

}



User user = new User ();

user.ID = "1";

user.name = "Kelly";

user.profilepic = BitmapToBase64(NGetBitmap(uri)); //this is the part where base64string is too long



HttpClient client = new HttpClient();

string url = $"http://test.azurewebsites.net/api/User/{user.ID}?name={user.name}&profilepic={user.profilepic}";

var uri1 = new System.Uri(url); //base64

client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

HttpResponseMessage response;

var json = JsonConvert.SerializeObject(feedback);

var content = new StringContent(json, Encoding.UTF8, "application/json");

response = await client.PostAsync(uri1, content);



if (response.StatusCode == System.Net.HttpStatusCode.Accepted)

{

    Toast.MakeText(this, "Your profile is updated.", ToastLength.Long).Show();

}

else

{

    Toast.MakeText(this, "Your profile is not updated." + feedback.profilepic, ToastLength.Long).Show();

}

I need help! Thank you in advance!

Update:
This is how my controller class currently look like

public HttpResponseMessage Update_User(int ID, string name, string profilepic)

{

    if (!ModelState.IsValid)

    {

        return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);

    }



    UserTable newUser = new UserTable();

    var entry = db.Entry<UserTable>(newUser);

    entry.Entity.ID = ID;

    entry.Entity.name = name;

    entry.Entity.profilepic = profilepic;

    entry.State = EntityState.Modified;



    try

    {

        db.SaveChanges();

    }

    catch (DbUpdateConcurrencyException ex)

    {

        return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex);

    }

    return Request.CreateResponse(HttpStatusCode.Accepted, "Your profile is updated.");

}

As mentioned in the comments, don't send the base64 image as part of the url/GET param.

Instead attach it to the body of the POST request.

var content = new FormUrlEncodedContent(new

{

    new KeyValuePair<string, string>("profilepic", user.profilepic)

});

var result = await client.PostAsync(url, content);