当 AutoGenerateColumns for nullable bool 时，WPF DataGrid 强制绑定 DataGridCheckBoxColumn [英] WPF DataGrid force binding DataGridCheckBoxColumn when AutoGenerateColumns for nullable bool

问题描述

我们有很多带有动态数据绑定的DataGrid，所以我们总是使用AutoGenerateColumns=True.对于 bool 列生成 DataGridCheckBoxColumn 但对于可为 null 的 bool(bool? 在 C# 中)生成默认的 DataGridTextColumn.有什么方法可以强制 DataGrid 自动为可空 bool 生成 DataGridCheckBoxColumn 吗?不喜欢依赖于实现的黑客.一些代码隐藏也被接受，例如在 AutoGeneratingColumn 事件中.

We have lots of DataGrid with dynamic data binding, so we always use AutoGenerateColumns=True. For bool columns generates a DataGridCheckBoxColumn but for a nullable bool (bool? in C#) generates the default DataGridTextColumn. Is there any way to force the DataGrid generate automatically a DataGridCheckBoxColumn for nullable bool? Prefer not implementation-dependant hacks. Also some code-behind is accepted for example in the AutoGeneratingColumnevent.

推荐答案

您应该注册 AutoGeneratingColumn 事件并根据列类型更改生成的列，如下所示:

you should register to AutoGeneratingColumn event and change the generated column based on column type, like so:

  private void dataGrid1_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
    {
        if (e.PropertyType == typeof(bool?))
        {
             DataGridCheckBoxColumn  checkBoxColumn=new DataGridCheckBoxColumn();
            checkBoxColumn.Header = e.Column.Header;
            checkBoxColumn.Binding = new Binding(e.PropertyName);
            checkBoxColumn.IsThreeState = true;

            // Replace the auto-generated column with the checkBoxColumn.
            e.Column = checkBoxColumn;
           }
    }

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