Question

我使用此链接http://thibaud60.blogspot.com/2010/02/footer-on-wpf-datagrid-by-use-several.html同步两个DataGrid，但拖放列标题有时会出错。

DataGrid有三列：A1，A2，A3

B DataGrid有三列：B1，B2，B3

我像SetBinding一样：

 Binding bindingWidth = new Binding();
 bindingWidth.Mode = BindingMode.TwoWay;
 bindingWidth.Source = A1;
 bindingWidth.Path = new PropertyPath(DataGridColumn.WidthProperty);
 BindingOperations.SetBinding(B1, DataGridColumn.WidthProperty, bindingWidth);

 Binding bindingDisplayIndex = new Binding();
 bindingDisplayIndex.Mode = BindingMode.TwoWay;
 bindingDisplayIndex.Source = A1;
 bindingDisplayIndex.Path = new PropertyPath(DataGridColumn.DisplayIndexProperty);
 BindingOperations.SetBinding(B1, DataGridColumn.DisplayIndexProperty, bindingDisplayIndex);

通常这项工作很好，

但是我通过在双向绑定不起作用时拖动列来改变A1 displayindex：

我拖动A3到A1位置不成功，但B3将成功改变位置为B1

A1.DisplayIndex！= B1.DisplayIndex？

为什么会这样？

Answer 1

我用过

 private static Dictionary<DataGridColumn, DataGridColumn> ColumnCache=new Dictionary<DataGridColumn,DataGridColumn>();

存储到DataGridColumn和

        dgSource.ColumnDisplayIndexChanged += (sender1, e1) =>
                {
                    var a=ColumnCache[e1.Column];
                    a.DisplayIndex = e1.Column.DisplayIndex;
                };

更改columnDisplayIndex和我使用绑定时的错误：

 Binding bindingDisplayIndex = new Binding();
 bindingDisplayIndex.Mode = BindingMode.TwoWay;
 bindingDisplayIndex.Source = A1;
 bindingDisplayIndex.Path = new PropertyPath(DataGridColumn.DisplayIndexProperty);
 BindingOperations.SetBinding(B1, DataGridColumn.DisplayIndexProperty, bindingDisplayIndex);

有决心。也许在columnDisplay更改之前有一些自动句柄

Answer 2

我花了一些时间才找到好方法，所以对于那些不想搜索的人:-) 谢谢你的帮助

private static Dictionary<DataGridColumn, DataGridColumn> ColumnCache = new Dictionary<DataGridColumn, DataGridColumn>();
private static void SynchronizeVerticalDataGrid(DataGrid source, DataGrid associated)
{
    associated.HeadersVisibility = source.HeadersVisibility & (DataGridHeadersVisibility.Row);
    associated.HorizontalScrollBarVisibility = ScrollBarVisibility.Hidden;

    int sourceColIndex = 0;
    for (int associatedColIndex = 0; associatedColIndex < associated.Columns.Count; associatedColIndex++)
    {
        var colAssociated = associated.Columns[associatedColIndex];
        var colSource = source.Columns[sourceColIndex];
        sourceColIndex++;

        ColumnCache.Add(colSource, colAssociated);

        Binding binding = new Binding();
        binding.Mode = BindingMode.TwoWay;
        binding.Source = colSource;
        binding.Path = new PropertyPath(DataGridColumn.WidthProperty);
        BindingOperations.SetBinding(colAssociated, DataGridColumn.WidthProperty, binding);
    }

    source.ColumnDisplayIndexChanged += (sender1, e1) =>
        {
            var a = ColumnCache[e1.Column];
            a.DisplayIndex = e1.Column.DisplayIndex;
        };
}

WPF：DataGrid同步B DataGrid使用columnWith和DisplayIndex

2 个答案: