如何将datagrid列按钮连接到不在其datacontext中的命令？ [英] How do I connect datagrid column button to a command not in its datacontext?
本文介绍了如何将datagrid列按钮连接到不在其datacontext中的命令？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个Wpf应用程序。使用具有集合视图作为其数据源的数据网格。
如何将行中的按钮连接到窗口主数据上下文中的命令？任何帮助赞赏。谢谢。
I have an Wpf app. with a data grid that has a collection view as its data source.
How can I connect the buttons in the rows to the command in the main data context of the window? Any help appreciated. Thanks.
<pre><Window x:Class="WpfBcApp2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:VModel="clr-namespace:WpfBcApp2.ViewModel"
mc:Ignorable="d"
Title="MainWindow" Height="500.53" Width="758.259">
<Window.DataContext>
<VModel:MainViewModel x:Name="MVMod"/>
</Window.DataContext>
<Window.Resources>
<CollectionViewSource x:Name="MtlColView" x:Key="cvsMtrls" Source="{Binding OcMaterial}" Filter="ShowOnlyFilter"/>
</Window.Resources>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="240"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Grid Grid.Column="1" Margin="10">
<Grid.RowDefinitions>
<RowDefinition Height="155"/>
<RowDefinition/>
</Grid.RowDefinitions>
<DataGrid x:Name="mTableDataGrid" AutoGenerateColumns="False" EnableRowVirtualization="True" ItemsSource="{Binding Source={StaticResource cvsMtrls}}" Margin="10" Grid.Row="1" RowDetailsVisibilityMode="VisibleWhenSelected" Padding="1,0" HeadersVisibility="Column" CanUserDeleteRows="False" CanUserAddRows="False" >
<DataGrid.Columns>
<DataGridTextColumn x:Name="shapeColumn" Binding="{Binding Shape}" Header="Shape"/>
<DataGridTextColumn x:Name="typeColumn" Binding="{Binding Type}" Header="Type"/>
<DataGridTextColumn x:Name="matNumColumn" Binding="{Binding MatNum}" Header="Mat Num"/>
<DataGridTextColumn x:Name="descColumn" Binding="{Binding Desc}" Header="Desc" Width="*"/>
<DataGridTextColumn x:Name="widthColumn" Binding="{Binding Width}" Header="Width"/>
<DataGridTextColumn x:Name="lengthColumn" Binding="{Binding Length}" Header="Length"/>
<DataGridTextColumn x:Name="sizeColumn" Binding="{Binding Height}" Header="Height"/>
<DataGridTemplateColumn Header="Add" MinWidth="45">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Button x:Name="DgBtnAdd" Content="Add" Click="DgBtnAdd_Click"></Button>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
<ListBox x:Name="ListType" HorizontalAlignment="Left" Margin="10,41,0,10" Width="105" SelectionChanged="ListType_SelectionChanged" ItemsSource="{Binding OcShapes}"></ListBox>
<ListBox x:Name="ListMat" HorizontalAlignment="Left" Margin="120,41,0,10" Width="102" SelectionChanged="ListMat_SelectionChanged" ItemsSource="{Binding OcMTypes}"></ListBox>
<ListBox x:Name="ListMach" HorizontalAlignment="Left" Margin="227,41,0,10" Width="164" ItemsSource="{Binding OcMachines}" SelectionChanged="ListMach_SelectionChanged" SelectedItem="{Binding SelMach}"></ListBox>
<Button x:Name="BtnReset" Content="Reset" Margin="0,123,10,10" Click="BtnReset_Click" HorizontalAlignment="Right" Width="72"/>
<Label Content="Shape" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="26" Width="45"/>
<Label Content="Type" HorizontalAlignment="Left" Margin="120,10,0,0" VerticalAlignment="Top" Height="26" Width="45"/>
<Label Content="MachList" HorizontalAlignment="Left" Margin="227,10,0,0" VerticalAlignment="Top" Width="56"/>
</Grid>
<Image x:Name="ImgBox" Height="207" VerticalAlignment="Top" Margin="10,41,10,0" Source="{Binding CurImage}"/>
<Label Content="Current QrCode" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top"/>
</Grid>
</Window>
<pre>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections.ObjectModel;
using WpfBcApp2.Model;
using System.IO;
using System.Windows.Input;
using System.Drawing;
using System.Data;
namespace WpfBcApp2.ViewModel
{
public class MainViewModel : ModelBase
{
//
public MatListDataSet1 MLDataSet = new MatListDataSet1();
public ObservableCollection<MTypes> OcMTypes { get; set; }
public ObservableCollection<Shapes> OcShapes { get; set; }
public ObservableCollection<Material> OcMaterial { get; set; }
public ObservableCollection<Machine> OcMachines { get; set; }
//
private const string Mpath = @"C:\Users\...\Desktop\MLDataSet.xml";
string TempPath = @"C:\Users\...\Desktop\TestMats.csv";
private const string MachListpath = @"C:\Users\...\Desktop\MachList.txt";
//
public RelCom BcImgCom { get; set; }
private RepClass.RepClass repClass;
public Bitmap CurImage { get; set; }
public Machine SelMach { get; set; }
public MainViewModel()
{
// Initialize instance of the Report class...
repClass = new RepClass.RepClass();
//
OcMaterial = new ObservableCollection<Material>();
Material Mat = null;
//
if (File.Exists(Mpath))
MLDataSet.ReadXml(Mpath);
//
foreach (MatListDataSet1.MatListRow MLRow in MLDataSet.MatList)
{
Mat = new Material();
//
if (!MLRow.IsShapeNull())
Mat.Shape = MLRow.Shape;
//
if (!MLRow.IsTypeNull())
Mat.Type = MLRow.Type;
//
Mat.MatNum = MLRow.MatNum;
//
if (!MLRow.IsDescNull())
Mat.Desc = MLRow.Desc;
//
if (!MLRow.IsWidthNull())
Mat.Width = MLRow.Width;
else
Mat.Width = "1";
//
if (!MLRow.IsLengthNull())
Mat.Length = MLRow.Length;
//
if (!MLRow.IsHeightNull())
Mat.Height = MLRow.Height;
//
if (!MLRow.IsFeedRateNull())
Mat.FeedRate = MLRow.FeedRate;
//
OcMaterial.Add(Mat);
//
}
//
if (File.Exists(Mpath))
MLDataSet.WriteXml(Mpath);
//
OcMTypes = new ObservableCollection<MTypes>();
OcShapes = new ObservableCollection<Shapes>();
//
IEnumerable<string> Mvals = OcMaterial.Where(m => m.Type != null).Select(m => m.Type).Distinct().ToList();
//
foreach (string mval in Mvals)
{
OcMTypes.Add(new MTypes(mval));
}
//
IEnumerable<string> Svals = OcMaterial.Select(m => m.Shape).Distinct().ToList();
//
foreach (string shape in Svals) // Was foreach in These
{
OcShapes.Add(new Shapes(shape));
}
//
OcMachines = new ObservableCollection<Machine>();
using (StreamReader reader = new StreamReader(MachListpath))
{
string line;
while ((line = reader.ReadLine()) != null)
{
if (!string.IsNullOrWhiteSpace(line))
{
OcMachines.Add(new Machine(line.Split(',')[0].Trim(), line.Split(',')[1].Trim()));
}
}
}
//
}
public bool AddMat_CanExecute(object parameter)
{
return true;
}
public void GetBcImage(object selectedItem)
{
if (selectedItem != null)
{
var Mat = selectedItem as Material;
CurImage = repClass.GetBcImg(repClass.GenBcString(SelMach.RoutNum, Mat.MatNum, Mat.Height, Mat.Width, Mat.Length, Mat.FeedRate), out string Err); // Set the image source.
}
}
}
}
What I have tried:
Google and Msdn searches. I have tried to connect the button to the command from within the designer. I think it has something to do with \"Relative source parent\".
I’m not that familiar with MVVM.
What I have tried:
Google and Msdn searches. I have tried to connect the button to the command from within the designer. I think it has something to do with "Relative source parent".
I'm not that familiar with MVVM.
推荐答案
Use the following XAML within the Button:
Use the following XAML within the Button:
Command="{Binding DataContext.OkCommand, RelativeSource={RelativeSource AncestorType={x:Type Window}}}"
Try using a DataContextProxy or also known as BindingProxy:
[WPF] How to bind to data when the DataContext is not inherited | Thomas Levesque’s .NET blog[^]
Try using a DataContextProxy or also known as BindingProxy:
[WPF] How to bind to data when the DataContext is not inherited | Thomas Levesque's .NET blog[^]
这篇关于如何将datagrid列按钮连接到不在其datacontext中的命令？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
