Binding LookupEdit存储库

Question

我在一个devexpress xtragrid控件中有三个lookupedit存储库(三列)。我想根据从lookupedit1中选择的值绑定lookupedit2，并基于lookupedit2绑定lookupedit3。当我单击lookupedit时，我只能看到填充的元素。但是，它不会在网格上显示选定的元素。

下面是我使用的代码：

void repositoryLookupEdit1_EditValueChanged(object sender, EventArgs e) {
    LookUpEdit edit = gridView.ActiveEditor as LookUpEdit;
    int val = Convert.ToInt32(edit.EditValue);
    if (!val.Equals(0)) {
        var elements = from e in dc.Elements select e;
        repositoryLookupEdit1.DisplayMember = "paymentType";
        repositoryLookupEdit1.ValueMember = "paymentTypeID";
        repZone.DataSource = bindData(elements);  
    }
}
public BindingSource bindData(object obj) {
    BindingSource ctBinding = new BindingSource();
    ctBinding.DataSource = obj;
    return ctBinding;
}

可能的问题是什么？

Answer 1

我相信这个例子会很有帮助：How to filter a second LookUp column based on a first LookUp column's value