读取自定义Datagrid的每个单元格数据 - WPF C＃

Posted 2021-05-04

我已经定义了一个自定义数据网格，其列由文本框，组合框和按钮组成。我还使用XAML Binding在每个组合框中填充数据。现在，我想从数据网格中读取每个选定的组合框值和文本框值。但是我找不到任何方法来阅读它。我研究过论坛并找到与DataGridView相关的解决方案但对DataGrid来说并不多。这是我的示例代码，我将定义自定义数据网格以及如何填充其中的数据。

public class Data
{

    public List<string> Disciplines { get; set; }
    public List<string> Members { get; set; }
    public List<string> ActionType { get; set; }


    public Data()
    {
        this.Disciplines = new List<string>
        {
            "Architecture", "Mechanical", "Structure"
        };

        this.Members = new List<string>
        {
            "Ali", "Mubashar", "Muffassir", "Nitin"
        };

        this.ActionType = new List<string>
        {
            "Take Action",
            "For Information"
        };




    }
}

---

public MainWindow()
{
    InitializeComponent();
    datagrid_additionalinfo.Items.Add(new Data());


}

---

<DataGrid  Name="datagrid_additionalinfo" Margin="20,0,20,0" 
                   IsReadOnly="False" SelectionMode="Single" CanUserAddRows="True" 
                   AutoGenerateColumns="False" SelectionUnit="Cell" >


            <DataGrid.Columns>

                <DataGridTemplateColumn Header="Comment"  Width="*" MinWidth="130">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBox Width="235"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

                <DataGridTemplateColumn Header="Discipline"   Width="100" >
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox Width="200" ItemsSource="{Binding Disciplines}"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

                <DataGridTemplateColumn Header="Members"  Width="100">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox Width="200" ItemsSource="{Binding Members}"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

                <DataGridTemplateColumn Header="Action Type"  Width="100">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox Width="200" ItemsSource="{Binding ActionType}"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

            </DataGrid.Columns>


  </DataGrid>

以下是自定义数据网格的样子：感谢任何帮助。谢谢

答案

除了集合属性public List<string> Disciplines { get; set; }声明所选项目的属性

public string SelectedDiscipline { get; set; }

并将其绑定到ComboBox

<ComboBox Width="200" 
          SelectedIndex="0"
          SelectedItem="{Binding SelectedDiscipline, UpdateSourceTrigger=PropertyChanged}"
          ItemsSource="{Binding Disciplines}"/>

并为其他属性做同样的事情

这样，您无需直接使用DataGridRow单元即可访问所有值

另一答案

我看到这里有基本的理解问题。你将代码与MVVM结构混合在一起。而不是那个代码;

datagrid_additionalinfo.Items.Add(new Data());

尝试使用ObservableCollection<Data>作为ViewModel中DataGrid的ItemSource。将ViewModel用作View的DataContext。之后，您可以绑定SelectedItems。

这是代码;

MainWindow.xaml

<Window x:Class="DataGridComboBox.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:local="clr-namespace:DataGridComboBox"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>

        <DataGrid  Name="datagrid_additionalinfo" Margin="20,0,20,0" 
                   ItemsSource="{Binding DataItems}" 
                   SelectedItem="{Binding SelectedDataRow, UpdateSourceTrigger=PropertyChanged}"
                   IsReadOnly="False" SelectionMode="Single" CanUserAddRows="True" 
                   AutoGenerateColumns="False"  >


            <DataGrid.Columns>

                <DataGridTemplateColumn Header="Comment"  Width="*" MinWidth="130">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBox Width="235"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

                <DataGridTemplateColumn Header="Discipline"   Width="100" >
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox Width="200" ItemsSource="{Binding Disciplines}" 
                                      SelectedItem="{Binding DataContext.SelectedDisipline, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

                <DataGridTemplateColumn Header="Members"  Width="100">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox Width="200" ItemsSource="{Binding Members}"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

                <DataGridTemplateColumn Header="Action Type"  Width="100">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox Width="200" ItemsSource="{Binding ActionType}"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

            </DataGrid.Columns>


        </DataGrid>
    </Grid>
</Window>

MainWindow.xaml.cs

    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = new MainWindowViewModel(); 
        }
    }


**MainWindowViewModel**

using System.Collections.ObjectModel;
using System.ComponentModel;

...

 public class MainWindowViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        private ObservableCollection<Data> m_DataItems;

        public ObservableCollection<Data> DataItems
        {
            get { return m_DataItems; }
            set { m_DataItems = value; }
        }


        private Data m_SelectedDataRow;
        public Data SelectedDataRow
        {
            get { return m_SelectedDataRow; }
            set { m_SelectedDataRow = value; }
        }


        private string m_SelectedDisipline;
        public string SelectedDisipline
        {
            get { return m_SelectedDisipline; }
            set { m_SelectedDisipline = value; }
        }

        public MainWindowViewModel()
        {
            m_DataItems = new ObservableCollection<Data>();

            //Fill Items 
            Data data; 
            for (int i = 0; i < 10; i++)
            {
                data = new Data();
                m_DataItems.Add(data);
            }
        }

        private void OnPropertyChanged(string propertyName)
        {
            var handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }

    }