Question

默认情况下，双击单元格会使其进入编辑模式，当它失去焦点时，如果我们按下ESC，它将提交数据或回滚。

我想创建一个自定义按钮，将一行中的所有单元格切换为编辑模式，一个按钮用于提交更改，一个按钮用于取消更改。

Datagrid是否已支持此功能，或者我是否必须自行实施所有逻辑？

我找到了一种方法可以将一行的所有单元格切换到编辑模式，但每次文本框失去焦点时，它都会关闭编辑模式

我该怎样防止这种情况？以及如何使OK按钮提交所有数据？

Answer 1

使用DataGrid.BeginEdit() / CancelEdit() / CommitEdit()方法。

有些事件需要处理：BeginningEdit，CellEditEnding，PreparingCellForEdit。

使用DataGridCell.IsEditing属性打开/关闭编辑模式。

您可以获得DataGridRow，您可以从中DataGridCell循环播放CellTemplate。有很多教程可供选择。

针对您的特定需求的精确方法： 1.为所有列创建2个模板。

并使用CellEditingTemplate更改CellTemplate以获取可修改列。

在取消/提交后再次使用旧CellTemplate更改<DataGrid x:Name="DGrid" SelectionUnit="FullRow" AutoGenerateColumns="False" ItemsSource="{Binding Students}" Height="400" CanUserAddRows="False" Margin="10,10,405,18"> <DataGrid.Columns> <DataGridTemplateColumn> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <StackPanel Width="100"> <Button Content="Edit" Click="Button_Click_1"/> </StackPanel> </DataTemplate> </DataGridTemplateColumn.CellTemplate> <DataGridTemplateColumn.CellEditingTemplate> <DataTemplate> <StackPanel Orientation="Horizontal" Width="100"> <Button Content="Cancel" Click="Button_Click_2"/> <Button Content="Commit" Click="Button_Click_3"/> </StackPanel> </DataTemplate> </DataGridTemplateColumn.CellEditingTemplate> </DataGridTemplateColumn> <DataGridTemplateColumn> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <TextBlock Text="{Binding Name}"/> </DataTemplate> </DataGridTemplateColumn.CellTemplate> <DataGridTemplateColumn.CellEditingTemplate> <DataTemplate> <TextBox Background="Aquamarine" Text="{Binding Name, Mode=TwoWay, UpdateSourceTrigger=Explicit}"/> </DataTemplate> </DataGridTemplateColumn.CellEditingTemplate> </DataGridTemplateColumn> </DataGrid.Columns>。

        // Edit
        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            DataGridRow row = (DataGridRow)DGrid.ItemContainerGenerator.ContainerFromItem(DGrid.CurrentItem);
            _showCellsEditingTemplate(row);
        }

        // Cancel
        private void Button_Click_2(object sender, RoutedEventArgs e)
        {
            DataGridRow row = (DataGridRow)DGrid.ItemContainerGenerator.ContainerFromItem(DGrid.CurrentItem);
            _showCellsNormalTemplate(row);
        }

        // Commit
        private void Button_Click_3(object sender, RoutedEventArgs e)
        {
            DataGridRow row = (DataGridRow)DGrid.ItemContainerGenerator.ContainerFromItem(DGrid.CurrentItem);
            _showCellsNormalTemplate(row, true);
        }

        private void _showCellsEditingTemplate(DataGridRow row)
        {
            foreach (DataGridColumn col in DGrid.Columns)
            {
                DependencyObject parent = VisualTreeHelper.GetParent(col.GetCellContent(row));
                while (parent.GetType().Name != "DataGridCell")
                    parent = VisualTreeHelper.GetParent(parent);

                DataGridCell cell = ((DataGridCell)parent);
                DataGridTemplateColumn c = (DataGridTemplateColumn)col;
                if(c.CellEditingTemplate !=null)
                    cell.Content = ((DataGridTemplateColumn)col).CellEditingTemplate.LoadContent();
            }
        }

        private void _showCellsNormalTemplate(DataGridRow row, bool canCommit = false)
        {
            foreach (DataGridColumn col in DGrid.Columns)
            {
                DependencyObject parent = VisualTreeHelper.GetParent(col.GetCellContent(row));
                while (parent.GetType().Name != "DataGridCell")
                    parent = VisualTreeHelper.GetParent(parent);

                DataGridCell cell = ((DataGridCell)parent);
                DataGridTemplateColumn c = (DataGridTemplateColumn)col;
                if (col.DisplayIndex != 0)
                {
                    if (canCommit == true)
                        ((TextBox)cell.Content).GetBindingExpression(TextBox.TextProperty).UpdateSource();
                    else
                        ((TextBox)cell.Content).GetBindingExpression(TextBox.TextProperty).UpdateTarget();
                }
                cell.Content = c.CellTemplate.LoadContent();                
            }
        }     



public class ViewModel
    {
        ObservableCollection<Student> _students = new ObservableCollection<Student>();
        public ObservableCollection<Student> Students
        { get { return _students; } set { _students = value; } }

        public ViewModel()
        {
            Students.Add(new Student() { Name = "Prashant", Address = "123, N2 B, Barkheda" });
            Students.Add(new Student() { Name = "Amit", Address = "123, N2 B, Piplani" });
            Students.Add(new Student() { Name = "Gopi", Address = "Subhash Nagar" });
            Students.Add(new Student() { Name = "S. Sachin", Address = "HabibGanj" });
        }
    }

    public class Student
    {
        public string Name { get; set; }
        public string Address { get; set; }
    }

代码隐藏

USE [DataPump]
GO

declare @login VARCHAR(30) = 'UserRevoke'

declare commands cursor for
SELECT 'Grant View Definition ON ' + schema_name(schema_id) + '.' + [name] + ' TO ' + '[' + REPLACE(REPLACE (@login, '[', ''), ']', '') + ']' 
FROM sys.all_objects s 
WHERE type IN ('P', 'V', 'FN', 'TR', 'IF', 'TF', 'U') 
    /*
    P - Stored Procedure 
    V - View 
    FN - SQL scalar-function
    TR - Trigger 
    IF - SQL inlined table-valued function
    TF - SQL table-valued function
    U - Table (user-defined)
    */
    AND is_ms_shipped = 0 
ORDER BY s.type, s.name 

declare @cmd varchar(max)

open commands
fetch next from commands into @cmd
while @@FETCH_STATUS=0
begin
  exec(@cmd)
  fetch next from commands into @cmd
end

close commands
deallocate commands

在DataGrid中创建自定义编辑行wpf

1 个答案: