Data commit

Task/GUI-component-interaction/C-sharp/gui-component-interaction.cs

@@ -0,0 +1,73 @@
+using System;
+using System.ComponentModel;
+using System.Windows.Forms;
+
+class RosettaInteractionForm : Form
+{
+    // Model used for DataBinding.
+    // Notifies bound controls about Value changes.
+    class NumberModel: INotifyPropertyChanged
+    {
+
+        Random rnd = new Random();
+
+        // initialize event with empty delegate to avoid checks on null
+        public event PropertyChangedEventHandler PropertyChanged = delegate {};
+
+        int _value;
+        public int Value
+        {
+            get { return _value; }
+            set
+            {
+                _value = value;
+                // Notify bound control about value change
+                PropertyChanged(this, new PropertyChangedEventArgs("Value"));
+            }
+        }
+
+        public void ResetToRandom(){
+            Value = rnd.Next(5000);
+        }
+    }
+
+    NumberModel model = new NumberModel{ Value = 0};
+
+    RosettaInteractionForm()
+    {
+        //MaskedTextBox is a TextBox variety with built-in input validation
+        var tbNumber = new MaskedTextBox
+                        {
+                            Mask="0000",            // allow 4 decimal digits only
+                            ResetOnSpace = false,   // don't enter spaces
+                            Dock = DockStyle.Top    // place at the top of form
+                        };
+        // bound TextBox.Text to NumberModel.Value;
+        tbNumber.DataBindings.Add("Text", model, "Value");
+
+        var btIncrement = new Button{Text = "Increment", Dock = DockStyle.Bottom};
+        btIncrement.Click += delegate
+                        {
+                            model.Value++;
+                        };
+        var btDecrement = new Button{Text = "Decrement", Dock = DockStyle.Bottom};
+        btDecrement.Click += delegate
+                        {
+                            model.Value--;
+                        };
+        var btRandom = new Button{ Text="Reset to Random", Dock = DockStyle.Bottom };
+        btRandom.Click += delegate
+                        {
+                            if (MessageBox.Show("Are you sure?", "Are you sure?", MessageBoxButtons.YesNo) == DialogResult.Yes)
+                                model.ResetToRandom();
+                        };
+        Controls.Add(tbNumber);
+        Controls.Add(btIncrement);
+        Controls.Add(btDecrement);
+        Controls.Add(btRandom);
+    }
+    static void Main()
+    {
+        Application.Run(new RosettaInteractionForm());
+    }
+}