public static async Task <string> GetRecognizeTextOperationResultsFromFile(string imageLocation, string computerVisionKey)
{
var cogSvcUrl = visionEndPoint + "vision/v2.0/recognizeText?mode=Printed";
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", computerVisionKey);
HttpResponseMessage response;
byte[] byteData = GetImageAsByteArray(imageLocation);
using (ByteArrayContent content = new ByteArrayContent(byteData))
{
content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
response = await client.PostAsync(cogSvcUrl, content);
}
RecognizeTextResult results = null;
if (response.IsSuccessStatusCode)
{
var data = await response.Content.ReadAsStringAsync();
results = JsonConvert.DeserializeObject <RecognizeTextResult>(data);
}
var headers = response.Headers;
var locationHeaders = response.Headers.GetValues("Operation-Location");
string locationAddress = "";
IEnumerable <string> values;
if (headers.TryGetValues("Operation-Location", out values))
{
locationAddress = values.First();
}
return(locationAddress);
}
public static async Task <RecognizeTextResult> GetRecognizeTextOperationResults(string locationAddress, string computerVisionKey)
{
var client = new HttpClient();
client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", computerVisionKey);
var response = await client.GetAsync(locationAddress);
RecognizeTextResult results = null;
if (response.IsSuccessStatusCode)
{
var data = await response.Content.ReadAsStringAsync();
results = JsonConvert.DeserializeObject <RecognizeTextResult>(data);
}
return(results);
}
private async Task DisplayText(RecognizeTextResult results)
{
var sb = new StringBuilder();
sb.Append("Status: ");
sb.Append(results.Status);
sb.Append("\r\n\r\n");
var lines = results.RecognitionResult.Lines;
foreach (Line line in lines)
{
sb.Append(line.Text);
sb.Append("\r\n");
}
ResultsTextbox.Text = sb.ToString();
}
private async void GetTextButton_Click(object sender, EventArgs e)
{
RecognizeTextResult results = await TextService.GetRecognizeTextOperationResults(_locationAddress, _computerVisionKey);
await DisplayText(results);
}
