Question

我正在使用WPF Datagrid，我正在尝试创建Add按钮，而不是新行中的Update和Delete按钮。

以下是datagrid的代码：

<DataGrid Name="dgCust" ItemsSource="{Binding}" AutoGenerateColumns="False" 
                              PreviewKeyDown="dgCust_PreviewKeyDown" 
                              AddingNewItem="dgCust_AddingNewItem" 
                              BeginningEdit="dgCust_BeginningEdit" 
                              RowEditEnding="dgCust_RowEditEnding" >
    <DataGrid.Columns>
        <mui:DataGridTextColumn Header="Customer ID"  Binding="{Binding ID}" IsReadOnly="True" />
        <mui:DataGridTextColumn Header="First Name" Binding="{Binding FirstName}" />
        <mui:DataGridTextColumn Header="Last Name" Binding="{Binding LastName}" />
        <mui:DataGridTextColumn Header="Phone" Binding="{Binding Phone}" />
        <mui:DataGridTextColumn Header="Email" Binding="{Binding Email}" />
        <mui:DataGridTextColumn Header="Address" Binding="{Binding Address}" />
        <DataGridTemplateColumn>
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <ContentControl>
                        <ContentControl.Resources>
                             <BooleanToVisibilityConverter x:Key="BoolToVisibilityConverter" />
                             <local:NotBoolToVisibilityConverter x:Key="NotBoolToVisibilityConverter" />
                        </ContentControl.Resources>
                        <StackPanel Orientation="Horizontal">
                              <Button Content="Update" Click="Update_Row_Button_Click"  CommandParameter="{Binding}"
                                Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}},Path=IsNewItem,Converter={StaticResource NotBoolToVisibilityConverter}}"/>
                              <Button Content="Delete" Click="Delete_Row_Button_Click"  CommandParameter="{Binding}"
                                Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}},Path=IsNewItem,Converter={StaticResource NotBoolToVisibilityConverter}}"/>
                                                <Button Content="Add" Click="Add_Row_Button_Click"  CommandParameter="{Binding}" 
                                Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}},Path=IsNewItem,Converter={StaticResource BoolToVisibilityConverter}}"/>
                          </StackPanel>
                          </ContentControl>
                     </DataTemplate>
                 </DataGridTemplateColumn.CellTemplate>
             </DataGridTemplateColumn>
    </DataGrid.Columns>
</DataGrid>

还添加了名称空间：xmlns:local="clr-namespace:MyProject"

使用新行中的Update按钮替换Delete和Add按钮的最佳解决方案是什么？

修改：添加了服务器端代码：

namespace MyProject
{
    public class NotBoolToVisibilityConverter : BooleanToVisibilityConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (System.Convert.ToBoolean(value))
            {
                return Visibility.Collapsed;
            }
            return Visibility.Visible;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

提前致谢。

Answer 1

不能使用单列显示两个按钮。这样解决方案将很容易，如下所示：

 <DataGridTemplateColumn>
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <ContentControl Loaded="ContentControl_Loaded">   
                        <ContentControl.Resources>
                            <BooleanToVisibilityConverter x:Key="BoolToVisibilityConverter" />
                            <local:NotBoolToVisibilityConverter x:Key="NotBoolToVisibilityConverter" />
                        </ContentControl.Resources>
                        <StackPanel Orientation="Horizontal">
                            <Button Content="Update" Click="Button_Click"  CommandParameter="{Binding}"
                                    Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}},Path=IsNewItem,Converter={StaticResource NotBoolToVisibilityConverter}}"/>
                            <Button Content="Delete" Click="Button_Click_1"  CommandParameter="{Binding}"
                                    Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}},Path=IsNewItem,Converter={StaticResource NotBoolToVisibilityConverter}}"/>
                            <Button Content="Add" Click="Button_Click_2"  CommandParameter="{Binding}" 
                                    Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}},Path=IsNewItem,Converter={StaticResource BoolToVisibilityConverter}}"/>
                        </StackPanel>
                    </ContentControl>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>

NotBoolToVisibilityConverter 是BooleanToVisibilityConverter的反转。

添加转化器：

public class NotBoolToVisibilityConverter : IValueConverter
{

    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        if (System.Convert.ToBoolean(value))
        {
            return Visibility.Collapsed;
        }
        return Visibility.Visible;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

在WPF数据网格中的新行中使用“添加”按钮替换“更新”

1 个答案: