/// <summary>
/// 自定义设置抛出验证不通过的信息
/// </summary>
/// <param name="frameworkElement">控件自身</param>
/// <param name="message">验证不通过的信息</param>
/// <param name="viewmodel">当前控件所属的ViewModel</param>
/// <param name="container">当前控件所属的容器：Grid，StackPanel</param>
/// <param name="needClearErrorWhenLostFocus">当再一次失去焦点时是否需要清除掉验证错误信息</param>
public static void Validation(this FrameworkElement frameworkElement, string message, ModelBase viewmodel,
FrameworkElement container, bool needClearErrorWhenLostFocus)
{
frameworkElement.SetValidation(message);
frameworkElement.RaiseValidationError();
if (needClearErrorWhenLostFocus)
{
TagObject tag = new TagObject();
tag.ViewModel = viewmodel;
tag.Container = container;
frameworkElement.Tag = tag;
frameworkElement.LostFocus += new RoutedEventHandler(frameworkElement_LostFocus);
}
}
static void frameworkElement_LostFocus(object sender, RoutedEventArgs e)
{
TagObject tag = null;
FrameworkElement frameworkElement = sender as FrameworkElement;
if (frameworkElement.Tag != null)
{
tag = frameworkElement.Tag as TagObject;
}
if (tag == null)
{
return;
}
ValidationManager.Validate(tag.Container);
if (!tag.ViewModel.HasValidationErrors)
{
frameworkElement.ClearValidationError();
}
}