WPF：A DataGrid同步B DataGrid与columnWith和DisplayIndex [英] WPF : A DataGrid sync B DataGrid With columnWith and DisplayIndex

问题描述

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

i used this link http://thibaud60.blogspot.com/2010/02/footer-on-wpf-datagrid-by-use-several.html to sync two DataGrid,but the Drag and drop column header sometime has bug.

DataGrid具有三列：A1，A2，A3

A DataGrid has three column: A1,A2,A3

B DataGrid具有三列：B1，B2，B3

B DataGrid has three column: B1,B2,B3

I SetBinding像这样：

I SetBinding like:

 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，

但是我有时通过拖动列来更改A1 displayindex的双向绑定不起作用：

but i changed A1 displayindex by drag the column sometime the two way binding is not work:

我将A3拖动到A1位置不成功，但是B3将成功将位置更改为B1

i drag A3 TO A1 position is not success , but B3 will success changed position to B1

A1.DisplayIndex！= B1.DisplayIndex吗？

the A1.DisplayIndex != B1.DisplayIndex ?

为什么会这样？

推荐答案

我花了一些时间找到好的方法，所以对于那些不想搜索的人:-)
谢谢您的帮助

I took some times to find the good approach, so for those who don't want search :-) Thank you for your help

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;
        };
}

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