Question

我正在尝试根据数据类型更改数据绑定DataGrid的水平列对齐方式（例如Int32，float，..）。

在网上搜索了我已经了解的一个简单的例子，通过xaml的DataTriggers应该是正确的选择。是对的吗？如果是这样，我将如何实现触发器？

我是WPF的新手，过去一直在使用WindowsForms。根据数据类型更改列方向并不困难？任何帮助表示赞赏！

Answer 1

这可能有所帮助 - Different views / data template based on member variable

另一个选择是使用DataTemplate选择器。只需查看本教程：http://tech.pro/tutorial/807/wpf-tutorial-how-to-use-a-datatemplateselector

Answer 2

您可以处理AutoGeneratingColumn事件。

在你的xaml中添加：

<DataGrid ItemsSource="{Binding}" AutoGenerateColumns="True" 
          AutoGeneratingColumn="DataGrid_OnAutoGeneratingColumn"></DataGrid>

在代码隐藏中：

private void DataGrid_OnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
   if (e.PropertyType == typeof (Int32))
   {
       if (e.Column != null)
       {
          var dgct = new DataGridTemplateColumn();
          var cName = e.Column.Header as string;
          var b = new Binding(cName);

          var sfactory = new FrameworkElementFactory(typeof(TextBlock));
          sfactory.SetValue(TextBlock.TextProperty, b);
          sfactory.SetValue(TextBlock.TextAlignmentProperty, TextAlignment.Right);
          var cellTemplate = new DataTemplate();
          cellTemplate.VisualTree = sfactory;
          dgct.CellTemplate = cellTemplate;

          dgct.Header = cName;
          dgct.SortMemberPath = cName;

          e.Column = dgct;
       }
   }

   ... *and so on for all your data types*

}

您可以查看以下链接：

http://msdn.microsoft.com/en-us/library/cc903950(v=vs.95).aspx http://mareinsula.wordpress.com/2011/06/06/tips-on-wpf-autogeneratinged-datagrid/

Answer 3

好的，我已经从现在的代码中解决了这个问题。也许有人可以给我一个暗示如何使用XAML更优雅地解决这个问题？我一直在网上搜索几个小时，找到一个对于刚接触WPF并且没有找到任何能够成功实现的东西的例子。

好的，这是代码：将DataTable作为DataSource添加以下内容：

foreach (DataColumn cc in table.Columns)
{
    Type type = cc.DataType;

    Style alignStyle = new Style(typeof(Microsoft.Windows.Controls.DataGridCell));                            
    alignStyle.Setters.Add(new Setter(Microsoft.Windows.Controls.DataGridCell.VerticalAlignmentProperty, VerticalAlignment.Center));

    var column = new Microsoft.Windows.Controls.DataGridTextColumn
    {
        Header = cc.ColumnName,
        Binding = new Binding(cc.ColumnName)
    };

    if(type.Name=="Int32"){
        alignStyle.Setters.Add(new Setter(TextBlock.TextAlignmentProperty, TextAlignment.Right));
        column.Foreground = Brushes.Red;
        column.CellStyle = alignStyle;
    }
    else if (type.Name == "DateTime")
    {
        alignStyle.Setters.Add(new Setter(TextBlock.TextAlignmentProperty, TextAlignment.Center));
        column.Foreground = Brushes.Green;
        column.Binding.StringFormat = "{0:dd.MM.yyyy}";
        column.CellStyle = alignStyle;
    }
    else if (type.Name == "String")
    {
        alignStyle.Setters.Add(new Setter(TextBlock.TextAlignmentProperty, TextAlignment.Left));
        column.Foreground = Brushes.Blue;
        column.CellStyle = alignStyle;
    }
    else if (type.Name == "Double")
    {
        alignStyle.Setters.Add(new Setter(TextBlock.TextAlignmentProperty, TextAlignment.Right));
        column.Foreground = Brushes.Brown;
        column.Binding.StringFormat = "{0:F3}";
        column.CellStyle = alignStyle;
    }

    grids.Columns.Add(column);
}

WPF数据绑定Datagrid根据数据类型更改水平列方向

3 个答案: