ComBox控件的使用

conn.Open();
OleDbDataAdapter myDA2=new OleDbDataAdapter("select * from Grade", conn);
myDA2.Fill(ds,"table");
//绑定combox数据源
comboBox1.DataSource=ds.Tables["table"];
comboBox1.ValueMember ="Grade_ID";
comboBox1.DisplayMember ="Grade_Name";

conn.Close();

int k =int.Parse(this.comboBox1.SelectedValue.ToString());//获取combox的选中值