/// <summary>
/// 删除按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button2_Click(object sender, EventArgs e)
{
// 实例化商品类，并委托给代理者类添加到数据库
DB_GOODS goods = new DB_GOODS(name, type, price, unit, count);
proxy.setRealSubject(goods);
proxy.recordDelete(adapter, dataGridView1);
proxy.recordSelect(adapter, dataGridView1);
}
/// <summary>
/// 增添商品按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
price = Convert.ToString(textBox3.Text); //if(textBox3.Text.Trim ()== String.Empty)
type = Convert.ToString(textBox2.Text);
name = Convert.ToString(textBox1.Text);
unit = Convert.ToString(textBox4.Text);
count = Convert.ToString(textBox5.Text);
// 实例化商品类，并委托给代理者类添加到数据库
DB_GOODS goods = new DB_GOODS(name, type, price, unit, count);
proxy.setRealSubject(goods);
proxy.recordInsert(adapter);
proxy.recordSelect(adapter, dataGridView1);
}
/// <summary>
/// 修改按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button3_Click(object sender, EventArgs e) //流程是先选中指定行，然后输入要修改的信息，再点击修改，弹出对话框修改完成，清空输入框内容
{ //判断文本框是否为空值，空值则判断为null。
if (textBox3.Text.Trim() != String.Empty)
{
price = null;
}
else
{
price = Convert.ToString(textBox3.Text);
}
if (textBox3.Text.Trim() != String.Empty)
{
type = null;
}
else
{
type = Convert.ToString(textBox2.Text);
}
if (textBox3.Text.Trim() != String.Empty)
{
name = null;
}
else
{
name = Convert.ToString(textBox1.Text);
}
if (textBox3.Text.Trim() != String.Empty)
{
unit = null;
}
else
{
unit = Convert.ToString(textBox4.Text);
}
if (textBox3.Text.Trim() != String.Empty)
{
count = null;
}
else
{
count = Convert.ToString(textBox5.Text);
}
// 实例化商品类，并委托给代理者类添加到数据库
DB_GOODS goods = new DB_GOODS(name, type, price, unit, count);
proxy.setRealSubject(goods);
proxy.recordUpdate(adapter, dataGridView1);
proxy.recordSelect(adapter, dataGridView1);
}
