xaml | 易学教程

Content Only being shown in a Single element at a given time

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问题 I am Trying to Display a bunch of Names with an Icon in a particular Scroll viewer. There are three main types of Icons that need to be displayed , However although all 3 Types pf Icons are disgustingly being displayed only One Element gets this Icon at a time. What I mean by this is say for example there are 6 Items being Displayed 2 From each different time. Then the Icon will only be displayed 3 times instead of 6 times . The moment I delete a particular Item of a given type then the Icon

How to multiple value in BindingContext in xamarin ContentPage

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问题 I have xamarin application where I need to pass two objects to .cs file on button click event. I have two ListView and have button in inside the 2nd Listview items. Both ListViews will be loaded dynamically based on the JSON. Now the problem is I need to send Parent ListView datasource and second ListView data source in the button click event. currently I am able to send only one using BindingContext but I need to send two or more objects to .cs file. <ListView x:Name="StaffListMaster_List"

WPF基础知识

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学习WPF,我们应该只集中精力弄清楚几个基本问题：什么是WPF？为什么要用WPF？怎么用WPF？第一，什么是WPF? WPF是伟大的M$提出的众多编程新概念的中的一个，是“Windows Presentation Foundation”的简称，翻译过来大意就是说是开发“表示层”（最简单的理解就是程序界面）的技术和工具。有人问，WPF只做界面的话，后台的逻辑怎么办？答曰：随便你怎么办。其实，WPF主要就是实现界面相关的内容，对于后台的逻辑，包括业务逻辑层和数据层，则不限于你使用什么样的技术，比如你可以使用微软的WCF和WF（你看名字就知道，这本来就是一套，伟大的M$从一开始就为你准备了一桌大餐而不是单独一道大菜）。最后，一句话总结什么是WPF，答曰：做界面的！科普一下相关概念：被热炒的Silverlight，其实也是和WPF关系匪浅，有一个说法是Sliverlight本来就是WPF的一个子集，是WPF的“网络版”。第二，为什么要用WPF? 表面原因：WPF开发界面很好很酷很炫。直接原因：公司/客户/老板/上司的要求。间接原因：M$不遗余力地推广。个人总结原因：WPF使用了独立的XAML语言，使得开发的界面真正和界面后的逻辑分离开了，这样就带来了种种方便，比如擅长修改界面的设计人员就不用老是和只会写代码的程序员反复沟通，他们只需要掌握XAML语言

Trying to override textbox for combobox styling (System.windows.markup.staticresourceholder exception)

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问题 I'm new in WPF and acccording to my previous question How to make selecteditem text red and bold on trigger (in combobox) I still have a problem with making my selecteditem (but not all combobox items) text red and bold in case when its IsNotCorrect property is true. If be more concrete I have system.windows.markup.staticresourceholder exception (it seems that all converters are declared, not sure of my new style declaring and the right order for it). These are the steps I have made: create

Grid doesn't stretch inside StackPanel

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问题 I have two textboxes with constant height, I want to vertically stack the textboxes and a grid. I tried with stackpanel but then the grid doesn't stretch and it stays with same size all the time (smallest as possible). <StackPanel Orientation="Vertical" MaxWidth="110"> <TextBox Background="White" Height="40" Text="some text1"/> <TextBox Background="White" Height="40" Text="some text2"/> <Grid x:Name="internalGrid"> <Grid.ColumnDefinitions> <ColumnDefinition Width="1*" MaxWidth="110"/>

How to make selecteditem text red and bold on trigger (in combobox)

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问题 I faced the problem: if I choose item from my combobox and its property .IsNotCorrect is true then make this selecteditem text red and bold and all other items in combobox are black. This is my attempt of doing this but nothing happens: <ComboBox x:Name="REASON_ID" DisplayMemberPath="Name" IsReadOnly="True" IsEditable="True" SelectedItem="{Binding SelectedReason, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}"> <ComboBox.ItemsSource> <CompositeCollection>

XAML概览

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1：什么是XAML XAML是WPF技术中专门用于设计UI的语言。 2：XAML的优点（1）XAML可以设计出专业的UI和动画——好用。（2）XAML不需要专业的编程知识，它简单易懂、结构清晰——易学。（3）XAML使设计师能直接参与软件的开发，随时沟通、无需二次沟通——高效。（4）无论是软件的功能还是UI的设计有所变化或者是出了bug，不会导致大量代码的修改。（5）帮助开发团队真正实现了UI与逻辑的剥离。来源： CSDN 作者： zhaoy1121 链接： https://blog.csdn.net/Hot_snail/article/details/104633132

Different binding behavior for string[] and List<string>

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问题 I try to understand (without success) why binding behaves differentially when source object is string[] and List<string> . I have two lists, their only difference is ItemsSource - in one case array in second List : XAML code: <StackPanel Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> <Button Content="Modify items" Click="Button_Click"/> <StackPanel Orientation="Horizontal"> <StackPanel.Resources> <DataTemplate x:Key="ItemTemplate"> <TextBlock Text="{Binding}" FontSize="16"/

Expander Header removing “_” character

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问题 I'm binding the Expander.Header property in XAML to a backing public property of string type in my ViewModel using the MVVM pattern: public string EnumName {...} I'm setting this property to "X_Y_Z" but for some strange reason the Expander Header is removing the first underscore character and it is displayed as XY_Z. I tried adding a "\" before or setting it to @"X_Y_Z" but no luck. Here my XAML binding portion: <Expander IsExpanded="true" Header="{Binding EnumName}"> Anybody know why I'm

Expander Header removing “_” character

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