C#代码中设置 控件的触发器

                            Style style = new Style();
                            style.TargetType = typeof(TextBox);
                            MultiDataTrigger trigger = new MultiDataTrigger();
                            Condition condition1 = new Condition();
                            condition1.Binding = new Binding() { Path = new PropertyPath("Text"), RelativeSource = RelativeSource.Self };
                            condition1.Value = "...";
                            Condition condition2 = new Condition();
                            condition2.Binding = new Binding() { Path = new PropertyPath("ToolTip"), RelativeSource = RelativeSource.Self };
                            condition2.Value = "...";
                            Setter setter = new Setter();
                            setter.Property = TextBox.BackgroundProperty;
                            setter.Value = Brushes.Green;
                            trigger.Conditions.Add(condition1);
                            trigger.Conditions.Add(condition2);
                            trigger.Setters.Add(setter);
                            style.Triggers.Clear();
                            style.Triggers.Add(trigger);
                            this.Style = style;//给控件加一个两个条件的触发器//上面的代码的结果是  当此控件的text属性为...或tooltip属性为...时，把控件的背景色设置为绿色