将项目（“---请选择---”）添加到带有数据源的组合框中

Question

我有一个包含数据源的组合框，但我想添加一个项目。

我希望它看起来像这样。

----Please select one---     //the item I want to add 
Tokyo                        //the items that came from the database
Osaka                        //the items that came from the database
Boston                       //the items that came from the database
Manila                       //the items that came from the database

我该如何解决这个问题？

谢谢

Answer 1

Combobox1.DataSource = Yourdatasource; // this is your datasource
Combobox1.Items.Add("----Please select one---");