WPF DataGrid后台添加绑定

后台直接增加绑定的列，下列使用了Header为1-10的列，绑定也需要key为1-10的各个值

for (int i = 0; i <= ColumnMAX; i++) 
{
    dataGrid.Columns.Add(new DataGridTextColumn() { Header = i,
        Binding = new Binding(string.Format("{0}", i))
    });
}
dataGrid.Columns.Add(new DataGridTextColumn()
{
    Header = "阈值",
    Binding = new Binding("阈值")
});

使用自动绑定，推荐不使用dataGrid.Items.Add(item)的方式，不然会导致“此视图不允许使用‘EditItem’异常”，推荐使用ItemsSource直接绑定

dynamic item = new System.Dynamic.ExpandoObject();
for (int i = 0; i <= ColumnMAX; i++)
{
    if (ViewModel.Points.Any(x => x.X == i))
    {
        ((IDictionary<String, Object>)item).Add(i.ToString(), ViewModel.Points.ToList().Find(x => x.X == i).Y);
    }
    else
        ((IDictionary<String, Object>)item).Add(i.ToString(), 0);
}
((IDictionary<String, Object>)item).Add("阈值",null);
//dataGrid.Items.Add(item);
_Items.Add(item);
dataGrid.ItemsSource = _Items;

DataGrid前面增加一个自动递增（从1开始）的序号 LoadingRow=“DataGrid_LoadingRow”

private void DataGrid_LoadingRow(object sender, DataGridRowEventArgs e)
{
    e.Row.Header = (e.Row.GetIndex() + 1).ToString();
}