How to access a variable in DataContext from XAML (WPF)?

For example, i have an array in CodeBehind, that i want to bind to a DataGridComboBox in XAML.

First, i know i have开发者_开发百科 to put the array in the DataContext(ok), but then how i access the array from XAML?

And how i make reference in the DataGridComboBox to bind the items from the array into the ComboBox?

My problem is working with DataContext, i can't really understand how to work with the DataContext.

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In WPF, the DataContext is simply the object that provides the root path for Binding Expressions in the XAML.

So when you set DataContext, perhaps in the code-behind like:

string[] DataArray = new[] { "John", "Peter", "Paul" };`
this.DataContext = DataArray;

You can access it from the XAML like:

<TextBox Text="{Binding Path=Count}" />

You are now accessing the Count property on DataArray, by virtue of the DataContext property.

If you wanted a particular array element, you could specify an index:

<TextBox Text="{Binding Path=[0]}" />

If you wanted to use the array as the source to an element that supports a collection:

<ItemsControl ItemsSource="{Binding}" />

No arguments to a binding expression simply accesses DataContext directly, in this case, an array.

Hope that helps!