当一个项目被选中组合框显示重复项目 [英] Combobox displays duplicate items when an item is selected

问题描述

我有一个Windows窗体上的数据绑定组合框。当我选择一个项目，所有其他绑定组件的正确更新。然而，下拉项的列表改变，使得所选择的项目是重复在列表中。例如，原来这里是清单：

I have a data-bound combobox on a Windows form. When I select an item, all of the other bound components update properly. However, the list of drop-down items changes so that the selected item is duplicated in the list. For example, here is the original list:

这是列表中的样子，当我选择一个项目：

This is what the list looks like when I select an item:

组合框绑定到BindingSource的是获取其数据从LINQ to SQL查询。显示件是SpecName，数值成员是规范ID，选择的值是在的BindingSource的规范ID字段。

The combobox is bound to a bindingsource that gets its data from a LINQ to SQL query. The Display Member is the SpecName, the Value Member is the SpecID and the Selected Value is the SpecID field in the bindingsource.

我怎样才能纠正这种重复的行为呢？

How can I correct this duplication behavior?

推荐答案

当我遇到类似的情况，原因是该组合框数据绑定|。Text属性

When I encountered a similar situation, the cause was the combobox Databindings|Text property.

我可以重复的，当这个属性被设置为相关的绑定源和显示领域的行为描述。

I could duplicate the behavior described when this property was set to the relevant binding source and display field.

将该属性设置为无造成的行为停止。

Setting the property to None caused the behavior to cease.

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