binding

问题 I have ItemType that implements everything one would need for Validation with the help of IDataErrorInfo interface: #region IDataErrorInfo implementation //WPF doesn't need this one public string Error { get { return null; } } public string this[string propertyName] { get { return GetValidationError(propertyName); } } #endregion #region Validation public bool IsValid { get { foreach (string property in ValidatedProperties) { if (GetValidationError(property) != null) { return false; } } return

问题 I am having trouble binding multiple TextCells in a ListView. It works fine if there's only one, but gives XamlParseException on adding more. The same Exception occurs while trying to bind a Label. That's why I had to use a TextCell. What's the solution? <ListView x:Name="pList"> <ListView.ItemTemplate> <DataTemplate> <TextCell x:Name="a" Text="{Binding ReceiverName}" TextColor="White" /> </DataTemplate> </ListView.ItemTemplate> </ListView> 回答1: From your comment on one of the answers, it

问题 have you ever have a problem like this: System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.UserControl', AncestorLevel='1''. BindingExpression:Path=DataContext; DataItem=null; target element is 'ContextMenu' (Name=''); target property is 'DataContext' (type 'Object') Code: <ContextMenu DataContext="{Binding Path=DataContext, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type

问题 I have a ComboBox whose xaml is as follows <ComboBox Name="ComboBoxDiscussionType" IsEnabled="{Binding ElementName=ComboBoxDiscussionType, Path=Items.Count, Converter={StaticResource ComboBoxItemsCountToBoolConverter}}"/> and the converter takes the Items.Count and checks if its greater than 0 if its greater than 0 then enable it else disable it The goal is enable the ComboBox if the ComboBox only if it has Items in it else disable it, ( self Binding to its item.count ) the following is my

问题 I am trying to bind a native c (not objective c) library to Xamarin.iOS. My project that consists of .c and .h files is building fine in XCode. Actual .h and .m of the project do not contain any functions, I only need to use the c-defined routines. The h file, that contains the required method definition looks like this: #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ #include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <string.h> int sprec_flac_encode(const char

问题 So I'm using the jQuery date picker, and it works well. I am using AJAX to go and get some content, obviously when this new content is applied the bind is lost, I learnt about this last week and discovered about the .live() method. But how do I apply that to my date picker? Because this isn't an event therefore .live() won't be able to help... right? This is the code I'm using to bind the date picker to my input: $(".datefield").datepicker({showAnim:'fadeIn',dateFormat:'dd/mm/yy',changeMonth

问题 Style definition in Resources/Shared.xaml ( updated ): <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:system="clr-namespace:System;assembly=mscorlib"> <system:Double x:Key="fullHeight" >26</system:Double> <system:Double x:Key="halfHeight" >16</system:Double> <Thickness x:Key="m">10</Thickness> <Style TargetType="Button"> <Setter Property="FontSize" Value="{StaticResource fullHeight}"/> <Setter

问题 I can't get the following XAML to work as I want. All bindings work because get no errors from the bindings. But I don't get the expected result from the binding on the RatioShape rectangle. The problem is that the attached property wpflib:RatioPanel.Ratio always returns its default value, not the databound value. So I'm thinking that the attached property on RatioShape is set in the wrong "context". How do bind to the attached property so that wpflib:RatioPanel gets the bound value? <wpflib

问题 I have a class which has a DependencyProperty member: public class SomeClass : FrameworkElement { public static readonly DependencyProperty SomeValueProperty = DependencyProperty.Register( "SomeValue", typeof(int), typeof(SomeClass)); new PropertyMetadata( new PropertyChangedCallback(OnSomeValuePropertyChanged))); public int SomeValue { get { return (int)GetValue(SomeValueProperty); } set { SetValue(SomeValueProperty, value); } } public int GetSomeValue() { // This is just a contrived example

问题 I do want to create a listview which consists of many items of an own class. One of the properties is a text which can contain one or more links in it. Normally I use a textblock with a binding on Text to get this content displayed. Now I do want those text being parsed for links and then dynamically make those links clickable. I found quite some code like Add hyperlink to textblock wpf on how to create a textblock with hyperlinks so I would be fine - but the WPF binding is available on the