C# Combobox清空值
C#combobox1中设置dropdownstyle为dropdownlist,清空时写法: comboBox1.SelectedIndex = -1;
C#combobox1中设置dropdownstyle为dropdown,清空时写法: comboBox1.text= "";
C#combobox1中设置了items,清空items时写法: comboBox2.Items.Clear();
原文地址:https://www.cnblogs.com/cnote/p/9093601.html