如何在代码隐藏中动态添加转换器

Question

我通过IDictionary将Datagrid绑定到动态数据:http://www.scottlogic.co.uk/blog/colin/2009/04/binding-a-silverlight-datagrid-to-dynamic-data-via-idictionary/comment -page-1 /#评论- 8681

但我不想在xaml中定义任何列(下面是如何在Colin Eberhardt的帖子中完成它

<data:DataGrid.Columns>
    <data:DataGridTextColumn Header="Forename" Binding="{Binding Converter={StaticResource RowIndexConverter}, ConverterParameter=Forename}" />
</data:DataGrid.Columns>

所以我编写了以下代码来尝试在后面的代码中执行相同的操作,但代码不会调用RowIndexConverter.必须遗漏一些东西.

码:

// add columns

DataGridTextColumn textColumn = new DataGridTextColumn();
textColumn.Header = "Forename";

Binding bind = new Binding("Forename");
bind.Converter = new RowIndexConverter() ;
bind.ConverterParameter = "Forename";            

textColumn.Binding = bind;
_dataGrid.Columns.Add(textColumn);

其余代码(此处为上下文):

// generate some dummy data
Random rand = new Random();
for (int i = 0; i < 200; i++)
{
    Row row = new Row();
    row["Forename"] = s_names[rand.Next(s_names.Length)];
    row["Surname"] = s_surnames[rand.Next(s_surnames.Length)];
    row["Age"] = rand.Next(40) + 10;
    row["Shoesize"] = rand.Next(10) + 5;

    _rows.Add(row);
}

// bind to our DataGrid
_dataGrid.ItemsSource = _rows;    

public class Row
{
    private Dictionary<string, object> _data = new Dictionary<string, object>();

    public object this[string index]
    {
        get
        {
            return _data[index];
        }
        set
        {
            _data[index] = value;
        }
    }
}

Answer 1

通过属性路径获取数据后调用转换器.由于Row中没有"Forename"属性,因此它不起作用(您可以在"输出"窗口中看到"绑定"异常).

我通过将Binding定义更改为:

    Binding bind = new Binding();
    bind.Mode = BindingMode.OneWay;

因为你不能没有路径的双向绑定(我没有第二行的例外).没有属性路径是有意义的,在第二个想法,因为我们想要绑定到完整的Row对象,而不是它的一个属性.

注意:使用VS 2008 SP1,WPF项目进行测试.