WPF 工具包 DataGrid 列调整大小事件 [英] WPF Toolkit DataGrid column resize event

问题描述

我在我正在处理的应用程序之一中使用 WPF Toolkit Datagrid.我想要的是将列宽和显示索引存储为用户首选项.我已经为列显示索引实现了它，但是对于调整大小，我在数据网格上找不到任何在列大小更改后触发的事件.我已经尝试过SizeChanged"事件，我猜它只有在最初计算大小时才会被触发，而且这也是针对整个数据网格而不是单个列.
任何替代解决方案或是否有人知道该事件?

I am using WPF Toolkit Datagrid in one of the applications I am working on. What I want is to store the column width and displayindex as a user preference. I have achived it for column displayindex but for resize I could not find any event on the datagrid which will trigger after column size change. I have tried the "SizeChanged" event which I guess is only fired when it is initially calculating the size and that too is for the whole datagrid and not for the individual columns.
Any alternate solution or if anybody knows about the event ?

推荐答案

取自... :

http://forums.silverlight.net/post/602788.aspx

加载后:

    PropertyDescriptor pd = DependencyPropertyDescriptor
                             .FromProperty(DataGridColumn.ActualWidthProperty,
                                           typeof(DataGridColumn));

        foreach (DataGridColumn column in Columns) {
                //Add a listener for this column's width
                pd.AddValueChanged(column, 
                                   new EventHandler(ColumnWidthPropertyChanged));
        }

2 种方法:

    private bool _columnWidthChanging;
    private bool _handlerAdded;
    private void ColumnWidthPropertyChanged(object sender, EventArgs e)
    {
        // listen for when the mouse is released
        _columnWidthChanging = true;
        if (!_handlerAdded && sender != null)
        {
            _handlerAdded = true;  /* only add this once */
            Mouse.AddPreviewMouseUpHandler(this, BaseDataGrid_MouseLeftButtonUp);
        }
    }

    void BaseDataGrid_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
    {
        if (_columnWidthChanging) {
            _columnWidthChanging = false;
          // save settings, etc

        }

        if(_handlerAdded)  /* remove the handler we added earlier */
        {
             _handlerAdded = false;
             Mouse.RemovePreviewMouseUpHandler(this, BaseDataGrid_MouseLeftButtonUp);
        }
    }

当用户拖动宽度时，ColumnWidthPropertyChanged 会不断触发.添加 PreviewMouseUp 处理程序可让您在用户完成时进行处理.

The ColumnWidthPropertyChanged fires constantly while the user drags the width around. Adding the PreviewMouseUp handler lets you process when the user is done.

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