后台代码破坏数据绑定的解决方法

 <dxe:ComboBoxEdit Width=" 150" Name="cbbUnitType" SelectedIndexChanged="cbbUnitType_SelectedIndexChanged"></dxe:ComboBoxEdit> 

<ListBox Name="lbCapability"  >
                        <ListBox.ItemTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Path=Capability_Name}"/>
                            </DataTemplate>
                        </ListBox.ItemTemplate>
</ListBox>

界面一个ListBox，一个ComboBox，实现下拉ComboBox实现ListBox主从数据联动

数据绑定加载主数据的ComboBox

List<FactoryVSMTMDL> listUnitTypes = new List<FactoryVSMTMDL>();

listUnitType=基于业务逻辑获取……

listUnitTypes.AddRange(listUnitType);
cbbUnitType.ItemsSource = listUnitTypes;
cbbUnitType.DisplayMember = "Unit_Type_Name";
cbbUnitType.ValueMember = "Unit_Type_ID";
cbbUnitType.SelectedIndex = 0;

 

 private void cbbUnitType_SelectedIndexChanged(object sender, RoutedEventArgs e)
        {
            FactoryVSMTMDL UnitType = (FactoryVSMTMDL)cbbUnitType.SelectedItem;
            if (UnitType.Unit_Type_ID != 0 && UnitType.Unit_Type_ID != null)
            {

                if (!factoryDAL.GetCapabilityByUnitType(UnitType.Unit_Type_ID, ref listCapability, ref strErrMsg))
                {
                    MessageBox.Show(strErrMsg);
                    return;
                }
                ListCapabilities.Clear();
                ListCapabilities.AddRange(listCapability);
                //后台逻辑常常会解除绑定，因此常常需要判断是否重新绑定
                DependencyProperty dp = ListBox.ItemsSourceProperty;
                if (!BindingOperations.IsDataBound(lbCapability, dp))
                {//判断是否该控件存在绑定
                Binding bingding = new Binding("Capability_Name");
                BindingOperations.SetBinding(lbCapability, dp, bingding);
                }
                lbCapability.ItemsSource = ListCapabilities;
            }

        }