binding

问题 We have some derived control classes which have specific data. And these controls also set the data error info and binding to some specific property. For example, if the property IsNew (providing it exists) is true then the background is highlighted. Now I want to know, what if I use these controls and bind to some objects which do not expose such property as IsNew? Will it affect the performance for Release version? 回答1: The error in itself will not cause any additional performance issues,

问题 I want to bind the DataTextField property of a ASP.NET drop down control to a property of an object that is a property of the initial data source. How would I accomplish that particular task. Drop down data source data schema public class A { public string ID { get; set; } public B { get; set; } } public class B { public string Name { get; set; } //want to bind the DataTextField to this property } ASP.NET code behind DropDownList MyDropDownList = new DropDownList(); List<A> MyList = GetList()

问题 I want to bind the DataTextField property of a ASP.NET drop down control to a property of an object that is a property of the initial data source. How would I accomplish that particular task. Drop down data source data schema public class A { public string ID { get; set; } public B { get; set; } } public class B { public string Name { get; set; } //want to bind the DataTextField to this property } ASP.NET code behind DropDownList MyDropDownList = new DropDownList(); List<A> MyList = GetList()

问题 I am simply trying to bind two controls as command parameters and pass them into my command as an object[] . XAML: <UserControl.Resources> <C:MultiValueConverter x:Key="MultiParamConverter"></C:MultiValueConverter> </UserControl.Resources> <StackPanel Orientation="Vertical"> <StackPanel Orientation="Horizontal"> <Button Name="Expander" Content="+" Width="25" Margin="4,0,4,0" Command="{Binding ExpanderCommand}"> <Button.CommandParameter> <MultiBinding Converter="{StaticResource

问题 I have tried nearly everything I found on google. But nothing works. I have this Xaml: <UserControl x:Class="Controller.General.Led" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="300"> <Grid> <Ellipse Name="ellipse" Fill="{Binding

问题 I'm trying to get a binding to work on a child object of a user control. The Xaml looks like this: <MyGrid> <MyColumn ExtendedColumnData="{Binding ColumnToolTipDescriptions}"/> </MyGrid> Here is how the classes are defined: [ContentProperty("Columns")] public class MyGrid : UserControl { private MyColumnCollection _columns; [DesignerSerializationVisibility(DesignerSerializationVisibility.Content), Category("Data")] public MyColumnCollection Columns { get { if (_columns == null) _columns = new

问题 I have an array, arrStudents, that contains my students' age, GPA, and name like so: arrStudents[0].Age = "8" arrStudents[0].GPA = "3.5" arrStudents[0].Name = "Bob" I tried to bind arrStudents to a DataGridView like so: dataGridView1.DataSource = arrStudents; But the contents of the array do NOT show up in the control. Am I missing something? 回答1: As with Adolfo, I've verified that this works . There is nothing wrong in the code shown, so the problem must be in the code you aren't showing. My

问题 The following code binds a GradientStop to the Background.Color property of TemplatedParent . Everything works but I am getting a binding error in the output window: System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=Background.Color; DataItem=null; target element is 'GradientStop' (HashCode=6944299); target property is 'Color' (type 'Color') <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml

问题 The following code binds a GradientStop to the Background.Color property of TemplatedParent . Everything works but I am getting a binding error in the output window: System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=Background.Color; DataItem=null; target element is 'GradientStop' (HashCode=6944299); target property is 'Color' (type 'Color') <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml

问题 I have a weird bug in my MVVMCross app. Considering the following scenario: <Switch android:layout_width="wrap_content" android:layout_height="wrap_content" android:focusable="false" android:clickable="false" android:layout_alignParentRight="true" android:id="@+id/activatedSwitch" local:MvxBind="Checked IsActive" /> Compile version: level 14 Minimum version: level 14 Target version: level 14 Linking: Sdk Assemblies Only Android Phone version is 4.1.2. When I run the app in Debug mode, all is