//添加数据按钮
private void btnAdd_Click(object sender, EventArgs e)
{
//先把数据保存到一个ClassInfo类
ClassInfo info = new ClassInfo();
info.className = tBClassName.Text.Trim();
info.classDesc = tBClassDesc.Text.Trim();
string sql = "insert into newTable output inserted.tClassId values(@name,@desc)";//能得到主键值
//创建参数数组,为了给sql语句中的参数赋值
//这里仅设定SqlParameter对象是属于什么参数的,这个参数的类型
SqlParameter[] parameter = new SqlParameter[]{
new SqlParameter("@name",SqlDbType.VarChar,50),
new SqlParameter("@desc",SqlDbType.VarChar,50)
};
//这里是赋值
parameter[0].Value = info.className;
parameter[1].Value = info.classDesc;
//把主键值赋值给info,这样所有成员都赋值了
info.classId = (Int32)SqlHelper.ExecuteScalar(sql, parameter);
//加入到list中
list.Add(info);
MessageBox.Show("添加成功");
}
//窗体载入时把数据读取到dateGridView
private void Form1_Load(object sender, EventArgs e)
{
list = new BindingList<ClassInfo>();
string sql = "select * from newTable";
using (SqlDataReader reader = SqlHelper.ExecuteDateReader(sql))
{
if (reader.HasRows)
{
while (reader.Read())
{
ClassInfo info = new ClassInfo();
//把读取到的数据保存到一个ClassInfo类对象
info.classId = reader.GetInt32(0);
info.className = reader.GetString(1);
info.classDesc = reader.GetString(2);
list.Add(info);//把这个info加入到list中
}
}
}
dataGridView1.DataSource = list;//数据绑定
}