在 C# WPF 中的 DataGrid 中双击特定单元格时，如何弹出消息框或文本框

Question

我有一个 DataGrid，我正在使用 C# WPF。我想找到一种方法，以便当用户双击我最后一列中的一个单元格时，会弹出一个文本框并显示该特定单元格中的所有内容。反正有可能这样做吗？你会认为有一种方法可以让我像

if (myDataGridObj.cellselected[i] is in this Column)

{ 
  do stuff
}

我基本上想在用户双击特定单元格时返回该特定单元格的内容。我不想弹出任何东西，除非该特定单元格属于某个列名并被单击。我只想归还那个单元格的内容。

Answer 1

1. 我们需要处理单元格的 MouseDoubleClickEvent。
2. 检查是否在我们想要的单元格中双击。
3. 然后我们需要在网格上显示一个带有单元格数据的 TextBox。
4. 如果我们在 TextBox 之外的 Grid 上单击任意位置，则应该隐藏 TextBox。

在本例中，双击地址列的最后一列，显示文本框。

以下代码可以直接使用：

<Window x:Class="WpfDataControls.DataGrid._32792409.Win32792409"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Win32792409" Height="329.323" Width="568.421">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="192*"/>
            <RowDefinition Height="107*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="87*"/>
            <ColumnDefinition Width="53*"/>
        </Grid.ColumnDefinitions>
        <DataGrid x:Name="DgrdEmployees"  PreviewMouseDown="Grid_PreviewMouseDown" HorizontalAlignment="Left" Margin="29,30,0,0" VerticalAlignment="Top" Height="148" Width="305" LoadingRow="DgrdEmployees_LoadingRow" />
        <TextBox x:Name="TbDgrdCellContent" Visibility="Hidden" Width="200" Height="100" HorizontalAlignment="Left" Margin="44,59,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Background="#FFFFF3F3" BorderThickness="4"/>
    </Grid>
</Window>

using System;
using System.ComponentModel;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Input;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Diagnostics;

using System.Windows.Media;

namespace WpfDataControls.DataGrid._32792409
{
    /// <summary>
    /// Interaction logic for Win32792409.xaml
    /// </summary>
    public partial class Win32792409 : Window
    {
        public Win32792409()
        {
            InitializeComponent();

            ICollectionView view = CollectionViewSource.GetDefaultView(DataStore.Employees);
            DgrdEmployees.ItemsSource = view;
        }

        private void Grid_PreviewMouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            TbDgrdCellContent.Visibility = System.Windows.Visibility.Hidden;            
        }

        private void DgrdEmployees_LoadingRow(object sender, DataGridRowEventArgs e)
        {
            MouseButtonEventHandler handler = new MouseButtonEventHandler(DgrdCell_MouseDoubleClick);
            e.Row.AddHandler(DataGridCell.MouseDoubleClickEvent, handler);
        }

        private void DgrdCell_MouseDoubleClick(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            Debug.WriteLine("Double click");

            DataGridCellInfo cellInfo = DgrdEmployees.CurrentCell;
            DataGridColumn col = cellInfo.Column;

            if (DgrdEmployees.Columns.IndexOf(col) < DgrdEmployees.Columns.Count - 1) return;

            FrameworkElement content = col.GetCellContent(cellInfo.Item);

            TbDgrdCellContent.Visibility = System.Windows.Visibility.Visible;
            TbDgrdCellContent.Text = ((TextBox)content).Text;
            TbDgrdCellContent.Focus();
        }

    }

    public class DataStore
    {
        static ObservableCollection<Employee> _employees;
        public static ObservableCollection<Employee> Employees { get { return _employees; } set { _employees = value; } }

        static DataStore() {
            _employees = new ObservableCollection<Employee>();
            _employees.Add(new Employee() { Name = "Anjum", Address = "nizamuddin" });
            _employees.Add(new Employee() { Name = "Ashok", Address = "bharat nagar" });
            _employees.Add(new Employee() { Name = "BAshok", Address = "bharat nagar" });
            _employees.Add(new Employee() { Name = "DAshok", Address = "bharat nagar" });
            _employees.Add(new Employee() { Name = "TAshok", Address = "bharat nagar" });
            _employees.Add(new Employee() { Name = "GAshok", Address = "bharat nagar" });

        }

    }

    public class Employee {

        public String Name { get; set; }
        public String Address { get; set; }        

    }
}

Answer 2

你能做一个单独的窗口对话框吗？像这样：

   <Window x:Class="MyDialog">
       <StackPanel>
           <TextBlock Text="" />
           <TextBox x:Name="MyTextBox" />
           <Button Content="Done" Click="DoneButton_Click" />
       </StackPanel>
   </Window>

现在你可以有一个简单的代码：

partial class MyDialog : Window {

    public MyDialog(String text) {
        InitializeComponent();
        DialogText = text;
    }

    public string DialogText {
        get { return MyTextBox.Text; }
        set { MyTextBox.Text = value; }
    }

    private void DoneButton_Click(object sender, System.Windows.RoutedEventArgs e)
    {
        DialogResult = true;
    }
}

在您的 onDoubleClick（或双击单元格时调用的任何内容）上，您可以创建一个新对话框并设置文本框的文本。

var dialog = new MyDialog("your content here");
dialog.ShowDialog();