public OcrApiServiceForm()
{
_formManager = new OcrApiServiceManager();
_formModel = _formManager.LoadLastRequest();
InitializeComponent();
SetControlsNames();
_apiCodeTextBox.Text = _formModel.ApiKey;
_languageCodeTextBox.Text = _formModel.LanguageCode;
_selectFileTextBox.Text = _formManager.GetFilePath(_formModel);
}
public OcrApiServiceForm()
{
_formManager = new OcrApiServiceManager();
_formModel = _formManager.LoadLastRequest();
InitializeComponent();
_errorProvider.SetIconPadding(_selectFileTextBox, -20);
// Sets control text from the resources
SetControlsNames();
// Adds existing language codes to combobox
_languageCodeComboBox.Items.AddRange(_formManager.GetCodes().ToArray());
// Fills form from model
_apiCodeTextBox.Text = _formModel.ApiKey;
_languageCodeComboBox.Text = _formModel.LanguageCode;
_selectFileTextBox.Text = _formManager.GetFilePath(_formModel);
}
/// <summary>
/// Gets file path from model
/// </summary>
/// <param name="model">Current form model</param>
/// <returns>Path from the current model or empty string if file does not exist or is of invalid type</returns>
public string GetFilePath(PostImageModel model)
{
string pathValidationResult = ValidateFilePath(model);
return string.IsNullOrEmpty(pathValidationResult)
? model.PicturePath
: string.Empty;
}
private void ToXML(PostImageModel model)
{
try
{
string directory = Path.GetDirectoryName(_lastPostedRequest);
if (!Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
File.Delete(_lastPostedRequest);
using (StreamWriter streamWriter = new StreamWriter(_lastPostedRequest))
{
_uiModelSerializer.Serialize(streamWriter, model);
}
}
catch
{ }
}
/// <summary>
/// Validates file path from model
/// </summary>
/// <param name="model">Current form model</param>
/// <returns> Error message if any or empty string</returns>
public string ValidateFilePath(PostImageModel model)
{
if (string.IsNullOrEmpty(model.PicturePath) || !File.Exists(model.PicturePath))
{
return string.Format(ControlsResource.FILE_NOT_FOUND, model.PicturePath);
}
if (!GetAllowedFileExtentions().Contains(Path.GetExtension(model.PicturePath)))
{
return ControlsResource.INVALID_FILE;
}
return string.Empty;
}
/// <summary>
/// Displays file browsing window
/// </summary>
/// <param name="model">Current form model</param>
/// <returns>Path to the selected file</returns>
public string BrowseFile(PostImageModel model)
{
string fileToOpen = string.Empty;
using (OpenFileDialog fileDialog = new OpenFileDialog())
{
//Sets initial browsing folder
if (!string.IsNullOrEmpty(model.PicturePath))
{
string directoryName = Path.GetDirectoryName(model.PicturePath);
if (Directory.Exists(directoryName))
{
fileDialog.InitialDirectory = directoryName;
}
}
// Adds allowed file types filter
if (_allowedFileTypes != null && _allowedFileTypes.Count() > 0)
{
fileDialog.Filter = BuildFileFilter();
}
//Displays dialog
if (fileDialog.ShowDialog() == DialogResult.OK)
{
fileToOpen = fileDialog.FileName;
}
}
return fileToOpen;
}
/// <summary>
/// Sends image to ocr service
/// </summary>
/// <param name="model">Model that contains values if the request properties</param>
/// <param name="callback">Action to be executed after response is received</param>
public void SendImage(PostImageModel model, Action<string> callback)
{
Task task = taskFactory.StartNew(() =>
{
string result = string.Empty;
try
{
// Trys to save current model state
ToXML(model);
// Creating parts of the request to be sent
IList<IFormPart> parts = new List<IFormPart>();
parts.Add(new FileFormPartModel("image", model.PicturePath, new Dictionary<string, string>() { { "Content-Type", GetContentType(model.PicturePath) } }));
parts.Add(new StringFormPartModel("language", model.LanguageCode));
parts.Add(new StringFormPartModel("apikey", model.ApiKey));
// Creats communicator and sending request
ServiceCommunicator communicator = new ServiceCommunicator();
ServiceResponse response = communicator.PostRequest(_ocrApiServiceUrl, parts, 10000);
result = response.ToString();
}
catch
{ }
return result;
}
).ContinueWith(cTask => { if (callback != null) callback(cTask.Result); }, TaskScheduler.FromCurrentSynchronizationContext());
}
