C# Convert image to hex and vice versa

    Here I want to show you how to convert image to hex format and vice versa  using C# language

To convert image to hex data we need only one line of code.

public void ConvertImageToHex(string filePath){
    return BitConverter.ToString(File.ReadAllBytes(fName));
} 

To bring back hex string to image we need to do a little bit more

// saves hex string image to the pathToSave
public static void SaveImageFromHex(string hex, string pathToSave)
{
    // Call function to Convert the hex data to byte array
    byte[] newByte = ToByteArray(hexImgData);
    MemoryStream memStream = new MemoryStream(newByte);

    // Save the memorystream to file
    Bitmap.FromStream(memStream).Save(pathToSave);
}

// Function converts hex data into byte array
private static byte[] ToByteArray(String HexString)
{
    int NumberChars = HexString.Length;
    byte[] bytes = new byte[NumberChars / 2];

    for (int i = 0; i < NumberChars; i += 2)
    {
        bytes[i / 2] = Convert.ToByte(HexString.Substring(i, 2), 16);
    }
    return bytes;
}

original posts: http://www.nullskull.com/faq/40/convert-hex-image-data-to-jpeg.aspx http://stackoverflow.com/questions/18717182/convert-jpeg-image-to-hex-format

JavaFX Table view

I'm writing this post just to remember to myself how did I achieved some goals.
So this first is about JavaFX Table view.

// Allow TableView select multiply rows  

tableView.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);



//Allow TableView to select single cell      

tableView.getSelectionModel().setCellSelectionEnabled(true);



//TableColumn<Batch, String> codeColumn; 

codeColumn.setCellValueFactory(new PropertyValueFactory<Batch, String>(

                "code"));



//Make the codeColumn editable 

codeColumn.setCellFactory(TextFieldTableCell.<Batch> forTableColumn());



//Register listner on finish editing cell 

codeColumn.setOnEditCommit(value -> {

            System.out.println(value.getRowValue().getCode());

        });



// Make column resizable 

codeColumn.prefWidthProperty()

                .bind(tableView.widthProperty().divide(3));







nameColumn.setCellValueFactory(new PropertyValueFactory<Batch, String>(

                "name"));



//If you have some double field than you have to

// use DoubleStringConverter from javafx.util.converters   

nameColumn.setCellFactory(TextFieldTableCell

                .<Batch, String> forTableColumn(new DefaultStringConverter()));



nameColumn.setOnEditCommit(value -> {

            System.out.println(value.getNewValue());

            System.out.println(value.getRowValue().getCode());

        });





nameColumn.prefWidthProperty().bind(tableView.widthProperty().divide(3));





btnCol.setMinWidth(150);





//Creating column which holds buttons 

btnCol.setCellValueFactory(new Callback<CellDataFeatures<Batch, Batch>, ObservableValue<Batch>>() {

            @Override

            public ObservableValue<Batch> call(

                    CellDataFeatures<Batch, Batch> features) {

                return new ReadOnlyObjectWrapper(features.getValue());

            }

        });



btnCol.prefWidthProperty().bind(tableView.widthProperty().divide(3));



//Fill column with buttons 

btnCol.setCellFactory(new Callback<TableColumn<Batch, Batch>, TableCell<Batch, Batch>>() {

            @Override

            public TableCell<Batch, Batch> call(TableColumn<Batch, Batch> btnCol) {

                return new TableCell<Batch, Batch>() {

                    final Button button = new Button();

                    {

                        button.setMinWidth(130);

                        button.setText("save");

                    }



                    @Override

                    public void updateItem(final Batch person, boolean empty) {

                        super.updateItem(person, empty);

                        //Setting user data to Model

                        button.setUserData(person);

                        setGraphic(button);

                        button.setOnAction(new EventHandler<ActionEvent>() {

                            @Override

                            public void handle(ActionEvent event) {

                               

                                Button btnButton = (Button)event.getSource();

                                //Retrieving user data which is Batch

                                Batch batch = (Batch)btnButton.getUserData();

                                System.out.println(batch.getCode());

                                System.out.println(batch.getName());

                            }

                        });

                    }

                };

            }

        });



//Filling table with data  

tableView.setItems(new BatchService().list());