Updating TreeList ItemSource

本文关键字：ItemSource TreeList Updating | 更新日期: 2023-09-27 18:11:32

我正在尝试更新Devexpress TreeList 's ItemSource。当我第一次按下按钮时，它似乎可以工作，但随后它就不再工作了……是否有其他东西我必须更新以改变ItemSource .

window.randButton.Click += delegate
            {
                string st = window.nList.CurrentCellValue.ToString();
                System.Diagnostics.Debug.WriteLine("Called: "+st);
                try {
                    window.treeList.ItemsSource = null;
                    window.treeList.ItemsSource = drawOrderBook(currCycle, st);
                    // currCylce is static data
                    // drawOrderBook computes what to display based on the filer st
                }
                catch(Exception er) { System.Diagnostics.Debug.WriteLine(er.ToString());  }

            };

我在DevExpress Grid中有类似的问题。

根据他们的指导方针/技术支持，当数据源被修改/更改时，您必须调用RefreshDataSource方法。

你的代码应该是这样的

window.randButton.Click += delegate
{
    string st = window.nList.CurrentCellValue.ToString();
    System.Diagnostics.Debug.WriteLine("Called: "+st);
    try 
    {
        window.treeList.ItemsSource = null;
        window.treeList.ItemsSource = drawOrderBook(currCycle, st);
        window.treeList.RefreshDataSource();
        // currCylce is static data
        // drawOrderBook computes what to display based on the filer st
    }
    catch(Exception er) { System.Diagnostics.Debug.WriteLine(er.ToString());  }
};