Binding ConvererParameter
WPF中ConverterParameter不可以绑定,可以通过如下扩展来实现ConverterParameter的Binding:
1.自定义ConverterBindableBinding和MultiValueConverterAdapter:
namespace TTSControl.UtilityClasses
{
public class ConverterBindableBinding : MarkupExtension
{
public Binding Binding { get; set; }
public IValueConverter Converter { get; set; }
public Binding ConverterParameterBinding { get; set; }
public Binding ConverterBinding { get; set; }
public override object ProvideValue(IServiceProvider serviceProvider)
{
MultiBinding multiBinding = new MultiBinding();
multiBinding.Bindings.Add(Binding);
multiBinding.Bindings.Add(ConverterParameterBinding);
if (ConverterBinding != null) multiBinding.Bindings.Add(ConverterBinding);
MultiValueConverterAdapter adapter = new MultiValueConverterAdapter();
adapter.Converter = Converter;
multiBinding.Converter = adapter;
return multiBinding.ProvideValue(serviceProvider);
}
}
}
namespace TTSControl.UtilityClasses
{
[ContentProperty("Converter")]
public class MultiValueConverterAdapter : IMultiValueConverter
{
public IValueConverter Converter { get; set; }
#region IMultiValueConverter Members
private object lastParameter;
private IValueConverter lastConverter;
public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
lastConverter = Converter;
if (values.Length > 1) lastParameter = values[1];
if (values.Length > 2) lastConverter = (IValueConverter)values[2];
if (Converter == null) return values[0];
return Converter.Convert(values[0], targetType, lastParameter, culture);
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
{
if (lastConverter == null) return new object[] { value };
return new object[] { lastConverter.ConvertBack(value, targetTypes[0], lastParameter, culture) };
}
#endregion
}
}
2。在xaml中绑定:
xmlns:uti="clr-namespace:TTSControl.UtilityClasses"
Binding="{Binding PermissionKey}" Converter="{StaticResource permissionValueConverter}"ConverterParameterBinding="{Binding UserName}" />
3。在自定义Converter类中获取绑定数据:
internal class PermissionValueConverter : DependencyObject, IValueConverter, IMultiValueConverter
{
// For testing of converter properties, we derice from DependencyObject and add a dependency property.
public String UserName
{
get { return (String)GetValue(UserNameProperty); }
set { SetValue(UserNameProperty, value); }
}
// Using a DependencyProperty as the backing store for ConcatSign. This enables animation, styling, binding, etc...
public static readonly DependencyProperty UserNameProperty =
DependencyProperty.Register("UserName", typeof(String), typeof(PermissionValueConverter), new UIPropertyMetadata(null));
#region IValueConverter Members
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
string permissionKey = (string)value;
string userName= (string)parameter;
List> PermissionValues = new List>();
PermissionValues = Database.GetPermissionValue(Properties.Settings.Default.gLanguage, userName, permissionKey);
return PermissionValues;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
#endregion
#region IMultiValueConverter Members
public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return Convert(values[0], targetType, values[1], culture);
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
{
return new object[] { ConvertBack(value, targetTypes[0], parameter, culture) };
}
#endregion
}
Binding ConvererParameter的更多相关文章
- org.apache.ibatis.binding.BindingException: Invalid bound statement (not found):
org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): da.huying.usermanag ...
- WPF binding 参考
Introduction This is an article on WPF Binding Cheat Sheet. Some of the Binding won't work for Silve ...
- 十五天精通WCF——第一天 三种Binding让你KO80%的业务
转眼wcf技术已经出现很多年了,也在.net界混的风生水起,同时.net也是一个高度封装的框架,作为在wcf食物链最顶端的我们所能做的任务已经简单的不能再简单了, 再简单的话马路上的大妈也能写wcf了 ...
- Binding笔记
Binding基础 绑定某个对象的属性值到控制上,写法如下: public class Order : INotifyPropertyChanged//只要实现此接口 { public event ...
- Data Binding使用技巧
Data Binding 根据变量,自动赋值到各widget. How 1.编写layout文件,这里的layout为: act_data_bind_demo.xml 这里需要先准备变量 在具体的wi ...
- WPF之Binding初探
初学wpf,经常被Binding搞晕,以下记录写Binding的基础. 首先,盗用张图.这图形象的说明了Binding的机理. 对于Binding,意思是数据绑定,基本用法是: 1.在xmal中使用 ...
- [XAML]类似WPF绑定的Binding的读取方法
在WPF的XAML里,依赖属性可以使用基于BindingBase之类的MarkupExtensin 读取XAML时,会自动的把该BindingBase转换为BindingExpressionBase ...
- [ASP.NET MVC 小牛之路]15 - Model Binding
Model Binding(模型绑定)是 MVC 框架根据 HTTP 请求数据创建 .NET 对象的一个过程.我们之前所有示例中传递给 Action 方法参数的对象都是在 Model Binding ...
- Exception:HTTP Status 500 - org.apache.ibatis.binding.BindingException: Invalid bound statement (not found)
主要错误信息如下: HTTP Status 500 - org.apache.ibatis.binding.BindingException: Invalid bound statement (not ...
随机推荐
- MySQL自定义函数例子
-- 根据ID查询对应行的name CREATE FUNCTION function_first (id INT) --创建 BEGIN --开始 ); --声明变量,必须写在第一行,每一个变量最好单 ...
- 学习_单片机/嵌入式_的资源链接。——Arvin
---恢复内容开始--- +单片机 -郭天祥的51单片机入门视频(链接: https://pan.baidu.com/s/1sl3xNDr 密码: 1zik) -51单片机20元购买资料公开(链接: ...
- Tomcat7.0安装配置
很久没有通过博客对学习所得进行记录了. 现在将使用Tomcat的一些经验和心得写到这里,作为记录和备忘.如果有朋友看到,也请不吝赐教. 首先,我个人使用的是apache-tomcat-7.0.27你可 ...
- PHP function
- examine self thrice a day2017
1.6.2017 葰γí千萬丆γáò絠ィ壬菏鰯嚸,銣惈絠,倁噵ㄖㄅ者β淂簳掉.千澫丕楆被莂亽抓ィ主鰯點,以佌襲撃.那個記駐,吢軟劊嗐死尓垍己ㄖㄅ.絠仒槇可笑,鯟覀者βる誐手裏魢泾吺有談半リ的籌碼,還茬 ...
- mybatis入门总结
背景: 最近“大胆地”把原本一个通过简单的JDBC连接数据库进行修改和查找操作的小项目改成用mybatis了.. 周四得到任务,周一要完成的,说是要添加查询条件和添加查询字段,修改的字段也多了几个,才 ...
- caffe中关于数据进行预处理的方式
caffe的数据层layer中再载入数据时,会先要对数据进行预处理.一般处理的方式有两种: 1. 使用均值处理 transform_param { mirror: true crop_size: me ...
- virtualbox安装增强功能(centos6.5)
vitualbox安装增强功能(centos 6.5) 1. 安装依赖包 #yum install kernel-headers-$(uname -r) #yum install kernel-dev ...
- 【翻译】安卓新播放器EXOplayer介绍
http://developer.android.com/guide/topics/media/exoplayer.html 前言: Playing videos and music is a p ...
- ActionBar compat 如何禁用ActionBar的显示/隐藏动画
ActionBar compat 如何关闭ActionBar的显示隐藏动画 @Override public boolean onCreateOptionsMenu(Menu menu) { //消除 ...