ComboBox binding dictionary as a data source

Http://www.cnblogs.com/refresh/archive/2012/07/14/2591503.html

Https://msdn.microsoft.com/zh-cn/library/system.windows.forms.bindingsource (v=vs.80). aspx

The value of the DataSource of a ComboBox can be set to an object that implements the IList interface, such as a DataSet or Array. The default is a null reference (Nothing in Visual Basic).

However, you may need to bind dictionary as the data source in the actual project. In this case, you can implement the indirect binding by placing the dictionary<> in the BindingSource.

BindingSource components are used in two ways:

First, it simplifies the binding of controls to data in a form by providing an indirection layer, current item management, change notification, and other services. This is done by attaching the BindingSource component to the data source, and then tying the controls in the form to the BindingSource component. All further interactions with the data, including positioning, sorting, filtering, and updating, are implemented by calling the BindingSource component.

Second, the BindingSource component can act as a strongly typed data source. Typically, the type of the underlying data source is fixed by one of the following mechanisms: Use the Add method to add an item to the BindingSource component. Set the DataSource property to a list, a single object, or a type. Both of these mechanisms create a strongly typed list. BindingSource supports simple data binding and complex data binding as indicated by its DataSource and DataMember properties.

For more detailed information on BindingSource, refer to: Http://msdn.microsoft.com/zh-cn/library/system.windows.forms.bindingsource (vs.80). The ASPX sample code is as follows:

1 dictionary<string, string> dic = new dictionary<string, string> (); 2 BindingSource bs = new BindingSource (); 3 Bs. DataSource = Dic;4 CBB. DataSource = Bs;5 CBB. DisplayMember = "Value"; 6 CBB. ValueMember = "Key";

ComboBox binding dictionary as a data source