我正在尝试显示带有动态列表的表单,但窗口不显示任何内容。我的课程如下
class ManagementFunctionModel
{
#region members
int _RangeLeft;
int _RangeTop;
int _RangeRight;
int _RangeBottom;
#endregion
#region properties
public int RangeLeft
{
get { return _RangeLeft; }
set { _RangeLeft = value; }
}
public int RangeTop
{
get { return _RangeTop; }
set { _RangeTop = value; }
}
public int RangeRight
{
get { return _RangeRight; }
set { _RangeRight = value; }
}
public int RangeBottom
{
get { return _RangeBottom; }
set { _RangeBottom = value; }
}
#endregion
}
窗口类如下
public partial class TestWindow : Window
{
ObservableCollection<ManagementFunctionModel> mMngModelList = new ObservableCollection<ManagementFunctionModel>();
public TestWindow()
{
mMngModelList.Add(new ManagementFunctionModel() { RangeLeft = 4 });
InitializeComponent();
}
}
xaml在
之下<Window x:Class="Rules_Editor.TestWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:my="clr-namespace:Rules_Editor"
Title="ManagementFunctions" Height="342" Width="545">
<Grid Height="234" Width="461">
<ListView x:Name="lstNames" ItemsSource="{Binding ManagementFunctionModel}" Margin="32,56,182,43" Grid.Column="1" Grid.Row="0">
<ListView.View>
<GridView x:Name="grdNames">
<GridViewColumn Header="Name" DisplayMemberBinding="{Binding RangeLeft}"/>
</GridView>
</ListView.View>
</ListView>
</Grid>
</Window>
请帮我找一下为什么我在GUI表单上看不到任何内容?我希望看到我在构造函数中添加的一个数字4
答案 0 :(得分:1)
首先,您应该考虑使用自动属性并更改您的类:
class ManagementFunctionModel
{
public int RangeLeft { get; set; }
public int RangeTop { get; set; }
public int RangeRight { get; set; }
public int RangeBottom { get; set; }
}
关于您的数据无法访问的问题,因为未在窗口中设置datacontext。在构造函数中,您可以将数据上下文分配给窗口类,如下所示:
public ObservableCollection<ManagementFunctionModel> mMngModelList{ get; private set; }
public TestWindow()
{
mMngModelList = new ObservableCollection<ManagementFunctionModel>();
mMngModelList.Add(new ManagementFunctionModel() { RangeLeft = 4 });
InitializeComponent();
this.DataContext = this;
}
更新: 您目前拥有的绑定:
ItemsSource="{Binding ManagementFunctionModel}"
应该成为
ItemsSource="{Binding mMngModelList}"
确保将mMngModelList设为公开
答案 1 :(得分:0)
根据建议,您应首先将POCO更改为具有自动属性。如果您要在POCO中拥有动态数据(属性在运行时更改),那么您将需要实现INotifyPropertyChanged
,但是现在,这将有效:
public class ManagementFunctionModel
{
public int RangeLeft { get; set;}
public int RangeTop { get; set;}
public int RangeRight { get; set;}
public int RangeBottom { get; set;}
}
接下来,在你的代码中,你想添加DataContext
,以及你将被绑定的列表。由于您要绑定,因此列表必须是属性。
public partial class TestWindow : Window
{
public ObservableCollection<ManagementFunctionModel> MyList { get; private set; }
public TestWindow()
{
InitializeComponent();
MyList = new ObservableCollection<ManagementFunctionModel>();
MyList.Add(new ManagementFunctionModel() { RangeLeft = 4 });
DataContext = this;
}
}
最后,您需要更新XAML中的绑定语法以使用新的列表属性。
<Grid Height="234" Width="461">
<ListView x:Name="lstNames" ItemsSource="{Binding MyList}" Margin="32,56,182,43" Grid.Column="1" Grid.Row="0">
<ListView.View>
<GridView x:Name="grdNames">
<GridViewColumn Header="Name" DisplayMemberBinding="{Binding RangeLeft}"/>
</GridView>
</ListView.View>
</ListView>
</Grid>