Binding List Control Values to an Expression

In this article we'll bind the ComboBox's Values property to an expression that is based on another local column. We'll

• Start by adding a new local Column called "Values" and place a TextBox that is bound to it on the View

class DemoComboBox:UIController
{
    public TextColumn Values = new TextColumn("Values");
} 

• To Bind the Values property to an expression, we'll use the BindValues event, in the events tab of the property sheet.

private void comboBox1_BindValues(object sender, StringBindingEventArgs e)
{
    e.Value = _controller.Values;
} 

• Run the controller and see how when we change the value in theValues TextBox, the options of the ComboBox, change accordingly.
• We can also do the same for DisplayValues, by adding a local column called DisplayValues and then binding the DisplayValues property, using the BindDisplayValues event.

Adding the local column to the Controller

class DemoComboBox:UIController
{
    public TextColumn Values = new TextColumn("Values");
    public TextColumn DisplayValues = new TextColumn("Display Values");
} 

Implementing the BindDisplayValues method in the View

private void comboBox1_BindDisplayValues(object sender, StringBindingEventArgs e)
{
    e.Value = _controller.DisplayValues;
} 

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