全部 - 尝试做两件事:我有一个简单的应用程序,并试图将我的 Viewmodel 集合绑定(bind)到我的 View 。有两种方法,但我都陷入了困境:
方法一:使用 Grid 作为容器来绑定(bind) textblock 属性。
方法 2:将对象的属性直接绑定(bind)到我 View 上的文本 block (不使用网格作为容器及其 Datacontext 属性)
Rule_Model_1.cs
public class Rule_Model_1
{
public string topMessage { get; set; }
public List<string> recipients { get; set; }
public string bottomMessage { get; set; }
public string hypLink { get; set; }
public OCCBlock blockType { get; set; }
public enum OCCBlock
{
HardBlock,
SoftBlock,
ModifyAndSend
}
}
Rule_VM_1.cs
class Rule_VM_1
{
#region Properties
public List<Rule_Model_1> rule { get; set; }
#endregion
#region Constructor
public Rule_VM_1()
{
#region Initializing a Rule
rule = new List<Rule_Model_1>();
rule.Add(new Rule_Model_1()
{
topMessage = "Lorem ipsum dolor sit amet.",
recipients = new List<string> {"pr@hotmail.com", "pra@gmail.com"},
bottomMessage = "Lorem ipsum dolor sit amet",
hypLink = "http://www.abc.com",
blockType = Rule_Model_1.OCCBlock.HardBlock
});
#endregion
}
#endregion
}
Rule_UI.xaml.cs
public partial class Rule_UI_1 : UserControl
{
Rule_VM_1 rulevm1;
public Rule_UI_1()
{
InitializeComponent();
rulevm1 = new Rule_VM_1();
DataContext = rulevm1;
}
}
Rule_UI.xaml
<UserControl x:Class="OCC_WPF_POC.Rule_UI_1"
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">
<GroupBox Header="Rule Details">
<Grid HorizontalAlignment="Center" VerticalAlignment="Center">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid Grid.Column="1" DataContext="{Binding rule}">
<Grid.RowDefinitions>
<RowDefinition Height="50"></RowDefinition>
<RowDefinition Height="200"></RowDefinition>
<RowDefinition Height="50"></RowDefinition>
</Grid.RowDefinitions>
<TextBlock Grid.Row="0" Text="{Binding topmessage}" />
</Grid>
</Grid>
</GroupBox>
该 View 仍然没有显示任何内容。同样如上所述 - 我如何让这两种方法都起作用?非常感谢任何代码示例
附图片
最佳答案
问题是您需要一个 ListView 来绑定(bind)到集合属性( rule
)。这应该有效:
<ListBox Grid.Column="1" ItemsSource="{Binding rule}">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding topmessage}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
要绑定(bind)到网格,可以设置
DataContext
使用索引器 []
:<Grid Grid.Column="1" DataContext="{Binding rule[0]}">
<TextBlock Grid.Row="0" Text="{Binding topmessage}" />
</Grid>
没有网格:
<TextBlock Text="{Binding rule[0].topmessage}" />
关于wpf - 无法绑定(bind)到我的 ViewModel 的集合,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12252166/