更新TreeList ItemSource

Question

我正在尝试更新一个Devexpress TreeList的ItemSource。它似乎在我第一次按下按钮时就能工作了，但是它不再起作用了……还有什么东西我必须更新才能改变ItemSource。

码

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());  }


            };

Answer 1

我对DevExpress网格也有类似的问题。

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

所以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());  }

};