我怎么能有它的数据源，它的显示部件的多个字段的组合框无需增加额外的列到其数据源？

我的意思是我想有一个与类似的DisplayMemberID+ A组合框 - 姓名。 1 - 黑色 2 - 白色 3 - 红色

我不想额外列添加到它的数据源。

感谢您

绑定到多个属性，不支持（在的WinForms）。你要扩展你的数据表与计算列并绑定到这个新列。

  dataTable.Columns.Add（IdAndName的typeof（串），ID +姓名）;

comboBox.DataSource = dataTable的;
comboBox.DisplayMember =IdAndName;
 

请参见 MSDN 有关有效EX pressions为计算列引用。也许你必须使用转换。

  dataTable.Columns.Add（IdAndName的typeof（串），转换（ID，'System.String'的）+姓名）;
 

How can I have a combobox with multiple fields of its data source as its display member without adding additional columns to its data source?

I mean I wanna to have a combobox with displaymember like "ID" + "-" "Name" . 1 - Black 2 - White 3 - Red

I DO NOT want to add additional column to its data source.

Thank you

Binding to multiple properties is not supported (in WinForms). You have to extend your DataTable with a computed column and bind to this new column.

dataTable.Columns.Add("IdAndName", typeof(String), "ID + Name");

comboBox.DataSource = dataTable;
comboBox.DisplayMember = "IdAndName";

See the MSDN for reference on valid expressions for computed columns. Maybe you have to use Convert.

dataTable.Columns.Add("IdAndName", typeof(String), "Convert(ID, 'System.String') + Name");