I. Summary
This article demonstrates the application of the WPF value converter through examples, and explains the knowledge points of the WPF value converter during the demonstration.
Ii. instance demonstration
1. Create the WPF Application converterexp. The program struct
In WPF, Silverlight, and Windows Phone program development, it is often necessary to make specific transformations of the bound data, such as the date of the DateTime type to YYYYMMDD, and, if one value is different depending on the other set of values, At this point, we need to customize our own converter.The. Net Framework provides two interfaces for converter interfaces, single-value conversionsIValueCon
in the resource (cvtns is a custom namespace and the Assembly of the ColorBrushConverter class is introduced ).
Finally, use this custom type converter:
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As you can tell from the above figure, there are 4 kinds of Templates available within WPF.
1.ControlTemplate-You use this, when you want to completely redefine the visual appearance of any
/// /// Value converter between bool and Visibility /// [ValueConversion(typeof(bool), typeof(Visibility))] public class VisibilityConverter : IValueConverter { #region IValueConverter Members /// /// Converts
/// /// Value converter between bool and IsChecked property value (bool?) /// [ValueConversion(typeof(bool), typeof(bool?))] public class IsCheckedConverter : IValueConverter { #region IValueConverter Members ///
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There is a field in the action that is of the birthday or date type. When we pass the value, it must be written as to automatically convert the type, however, in some cases, you may need to write 19990101 so that automatic type conversion is not performed by default. In this way, you can write a custom type converter to achieve conversion.
Struts2 has two types of converters:
Partial: it applies to an action conversion type.
First, you need to customi
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Custom type converter Convert, converter convert
// Specify a type converter (convert String to Date) ConvertUtils. register (new Converter () {@ Override public Object convert (Class clazz, Object value) {// convert string to date SimpleDateFormat format = new SimpleDateFormat ("yyyy-MM-dd"); Date parse = null; try {p
Struts2 registers a local converter and a local Converter
To implement a custom converter, You need to inherit the defatypetypeconverter class or the StrutsTypeConverter class from the objects to be converted, and obtain the entry of a type converter to implement the developer's own type
Typeconverter class. The description in msdn provides a unified method to convert the value type to other types, as well as access standard values and sub-attributes.Let's take a look at the example to translate a string into a type converter with a point structure.Public class pointconverter: typeconverter {Public override bool canconvertfrom (itypedescriptorcontext context, type sourcetype ){If (sourcetype = typeof (string) {return true ;}Return bas
TCP transmission: Use the socket service to implement a text converter, socket Text Converter
Reprinted please indicate the source, thank you: http://blog.csdn.net/harryweasley/article/details/45665291
I recently read a teaching video and learned socket programming. There is an example in which I feel that it is well written. I will organize it here to help me recall and view it.
Requirement: Text
binding.
What is the difference between WPF Data Binding and ASP. NET and WinForm data binding? The biggest difference is that WPF uses {Binding ...} This statement.
Binding is used to bind the properties of the interface control to the background data. In this way, the foreground interface is associated with the background data to achieve the interface and data coupling.
The
object to a string in some way.
To achieve these transformations, there is a magician in Struts 2.0 who can help you--converter. With it, you don't have to repeat this code over and over again:
Date birthday = dateformat.getinstance (dateformat.short). Parse (strdate);
OK, now let's take a look at an example.
Converters--hello World
At the end of my last article, "Internationalizing in Struts 2.0 (i18n) Your application," I gave an example tha
pageMv.addobject ("datamsg", Ex.getmessage ()); returnMV; } @RequestMapping ("/first") //The type conversion work must be performed before the actual handler method executes. PublicString Dofirst (Date birthday,intAgethrowsException {System.out.println ("222222222222222222222"); System.out.println (Birthday+ "==========="); System.out.println ( Age+ "==============="); return"/index.jsp"; }}4. MapperXmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"Xmlns:context= "Http://www.springfr
; requestmappinghandlermappingAnnotationmethodhandleradapter-> RequestmappinghandleradapterAnnotationmethodhandlerexceptionresolver-> ExceptionhandlerexceptionresolverAll of the above are automatically registered after using the Annotation-driven.and the corresponding respectively provided abstracthandlermethodmapping, Abstracthandlermethodadapter and Abstracthandlermethodexceptionresolver to make it easier for users to implement custom implementation classes.
Spring MVC
Java code
As can
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