等待某种情况后 再绑定事件
作者:互联网
功能:
有两个combobox,当改变第一个combobox时,第二个combobox会重新绑定新的数据源, 当第二个改变时,第一个也会重新绑定新的数据源
遇到的问题:
当改变第一个combobox时,第二个combobox会触发事件改变了数据源,但随之第二个combobox也改变了,又触发了第一个combobox事件
解决方法之一:
先解绑,后用Dispatcher.BeginInvoke()的方式绑定
private void FromBox_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
{
this.ToBox.SelectionChanged -= this.ToBox_SelectionChanged_1;
if (((Selector)e.Source).SelectedValue == null) return;
string name = ((Selector)e.Source).SelectedValue.ToString();
DataTable dt = CarAreaSubManager.Create().SelectTagSource(name);
DataView dv = dt.DefaultView;
this.ToBox.ItemsSource = dv;
this.ToBox.DisplayMemberPath = "area_sub_name";
this.ToBox.SelectedValuePath = "area_sub_name";
this.Dispatcher.BeginInvoke(new Action(() => { this.ToBox.SelectionChanged += this.ToBox_SelectionChanged_1; }), DispatcherPriority.ApplicationIdle);
}
private void ToBox_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
{
this.FromBox.SelectionChanged -= this.FromBox_SelectionChanged_1;
if (((Selector)e.Source).SelectedValue == null) return;
string name = ((Selector)e.Source).SelectedValue.ToString();
DataTable dt = CarAreaSubManager.Create().SelectFromSource(name);
DataView dv = dt.DefaultView;
this.FromBox.ItemsSource = dv;
this.FromBox.DisplayMemberPath = "area_sub_name";
this.FromBox.SelectedValuePath = "area_sub_name";
this.Dispatcher.BeginInvoke(new Action(() => { this.FromBox.SelectionChanged += this.FromBox_SelectionChanged_1; }),DispatcherPriority.ApplicationIdle);
}
标签:sub,FromBox,name,ToBox,combobox,绑定,SelectionChanged,等待,某种 来源: https://www.cnblogs.com/ykgbk/p/10749625.html