Data triggers are a great feature of WPF. They allow you to change the style properties of a control depending on the data of the bound items of that control.
In this tutorial, I am going to bind a set of data to a ListBox, and use Data Triggers to let me know when something is wrong.
So first, I am going to create a Person class. This class will have three public properties: Name, Age, and IsValid. All three properties will be readonly. The IsValid property will return whether the data of the class is good or not.
public class Person
{
private string name;
public string Name
{
get { return name; }
private set { name = value; }
}
private int age;
public int Age
{
get { return age; }
private set { age = value; }
}
public bool IsValid
{
// will return false if either the name is blank
// or if the age is 0.
get { return (!string.IsNullOrEmpty(name) && age != 0); }
}
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