代码如下
OleDbConnection myconn = new OleDbConnection(str);
OleDbCommand mycmd = myconn.CreateCommand();
mycmd.CommandText = "delete * from 供应商表 where g_no=?";
mycmd.Parameters.Add("g_no",System.Data.OleDb.OleDbType.Char);
mycmd.Parameters[0].Value = textBox1.Text;
try
{
myconn.Open();
mycmd.ExecuteNonQuery();
MessageBox.Show("删除成功！");
myconn.Close();

}
catch{MessageBox.Show("删除失败！");}