1<Window.Resources>2<ControlTemplate x:Key="TextBoxErrorTemplate">3<StackPanel Orientation="Horizontal">4<AdornedElementPlaceholder x:Name="Adorner"/>5<TextBlock6Margin="10,0,0,0"7Foreground="Red"8Text="{Binding ElementName=Adorner, Path=AdornedElement.(Validation.Errors)[0].ErrorContent}"/>9...
{//Check if dependency object is valid.//NOTE: Validation.GetHasError works for controls that have validation rules attachedboolisValid = !Validation.GetHasError(node);if(!isValid) {//If the dependency object is invalid, and it can receive the focus,//set the focusif(nodeisIInputElement)...
請注意,.NET Framework 允許利用信任的程式碼來擴充 XBAP 網際網路區域沙箱,方式是允許開發人員撰寫已使用 AllowPartiallyTrustedCallersAttribute (APTCA) (部分機器翻譯) 標記的受控組件,然後部署至使用者的全域組件快取 (GAC)。 在組件上標記 APTCA 是一項極為敏感的安全性作業,因為這可讓任何程式碼 (包括來自網...
}staticboolValidate<T>(T obj,outICollection<ValidationResult>results) { results=newList<ValidationResult>();returnValidator.TryValidateObject(obj,newValidationContext(obj), results,true); } 代码中实例化了一个非法的User,代码执行结果如下: 这些ErrorMessage是.NET提供的,如果需要自定义错误信息可以在Attribute...
自定义一个Attribute特性类 public class NotValueAttribute : Attribute { public string ValidateValue { get; set; } public NotValueAttribute(string value) { ValidateValue = value; } } 1. 2. 3. 4. 5. 6. 在重写索引器中的get方法 public string this[string columnName] ...
ValueConversion attribute. ITyped list, InstanceFactory, or BindingList(T). Electronic Documentation Management (EDM). WPF Features with Limited Support in Silverlight Data Binding The basics of Silverlight and WPF data binding are the same. However, there are some data-binding features offered in ...
Quick info displayed for an XML attribute Code Snippets IntelliPrompt code snippets provide a way to insert pre-defined fragments of text into the editor. Each code snippet can declare multiple fields of text, and when a code snippet template session is activated in SyntaxEditor, the text is in...
How to: Implement Attribute-Based Validation #CRUD Operations You can implement CRUD operations (create, read, update, delete). These operations allow users to manage data in the Data Grid. Refer to the following topic for more information:Implement CRUD Operations in a Data-Bound Grid. ...
The following XAML example sets the background color of a button to red. The string value for the XAML attribute is type-converted by the WPF XAML parser into a WPF type. In the generated code, the WPF type is aColor, by way of aSolidColorBrush. ...
User validation code in the view-model - in which case, the user code can directly add or remove validation errors from the collection. If the ValidatesOnExceptions binding attribute is set to True, the framework will check for exceptions thrown during the update of the underlying data in the...