自定義TextBox,實現自增自減

我們使用附加屬性來實現，依賴屬性也可以實現，原理一樣

如圖xmal

using system;

using system.collections.generic;
using system.linq;
using system.text;
using system.threading.tasks;
using system.windows;
using system.windows.controls;
using system.windows.controls.primitives;
namespace textboxtest
public object convertback(object value, type targettype, object parameter, cultureinfo culture)
}/// /// 測試附加屬性
/// 
public class textboxhelper
public static void setisaddbuttonvisible(dependencyobject obj, bool value)
// using a dependencyproperty as the backing store for myproperty.  this enables animation, styling, binding, etc...
public static readonly dependencyproperty isaddbuttonvisibleproperty =
dependencyproperty.registerattached("isaddbuttonvisible", typeof(bool), typeof(textboxhelper), new propertymetadata(ontextchanged));
public static bool getisremovebuttonvisible(dependencyobject obj)
public static void setisremovebuttonvisible(dependencyobject obj, bool value)
public static readonly dependencyproperty isremovebuttonvisibleproperty =
dependencyproperty.registerattached("isremovebuttonvisible", typeof(bool), typeof(textboxhelper), new propertymetadata(ontextchanged));
private static void ontextchanged(dependencyobject d, dependencypropertychangedeventargs e)
else
textbox.removehandler(button.clickevent, new routedeventhandler(buttonclicked));
textbox.addhandler(button.clickevent, new routedeventhandler(buttonclicked));
}/// /// 滑鼠滾輪
/// 
/// 
/// 
private static void textbox_mousewheel(object sender, system.windows.input.mousewheeleventargs e)
else
textbox.select(textbox.text.length, 0);//游標設定到文字尾部}}
private static void buttonclicked(object sender, routedeventargs e)
else
textbox.focus();
textbox.select(textbox.text.length, 0);}}
}}

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