private static bookAdd _instance = null; // 单例模式
public static bookAdd CreateInstance()
{
if (_instance == null)
{
_instance = new bookAdd();
}
return(_instance);
}
private void bookAdd_Load(object sender, EventArgs e)
{
int bkID = bookAddControler.GetLastBkID();
if (bkID == -1)
{
MessageBox.Show("连接数据库失败，请检查您的网络连接！", "错误：", MessageBoxButtons.OK, MessageBoxIcon.Error);
_instance = null;
this.Dispose();
}
textBox_bkID.Text = (bkID + 1).ToString();
comboBox_bkCatalog.SelectedIndex = 0;
comboBox_bkLanguage.SelectedIndex = 0;
}
private void btnAdd_Click(object sender, EventArgs e)
{
if (textBox_bkCode.Text == "")
{
MessageBox.Show("图书编号不能为空！", "提示：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return;
}
if (textBox_bkName.Text == "")
{
MessageBox.Show("图书名称不能为空！", "提示：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return;
}
if (textBox_bkAuthor.Text == "")
{
MessageBox.Show("图书作者不能为空！", "提示：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return;
}
if (textBox_bkPress.Text == "")
{
MessageBox.Show("出版社名不能为空！", "提示：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return;
}
if (textBox_bkISBN.Text == "")
{
MessageBox.Show("ISBN不能为空！", "提示：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return;
}
try
{
if (Int32.Parse(textBox_bkPages.Text) <= 0)
{
MessageBox.Show("图书页数必须大于0！", "提示：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return;
}
}
catch (Exception)
{
MessageBox.Show("请输入正确的图书页数！", "错误：", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
try
{
if (decimal.Parse(textBox_bkPrice.Text) <= 0)
{
MessageBox.Show("图书价格必须大于0！", "提示：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return;
}
}
catch (Exception)
{
MessageBox.Show("请输入正确的价格！", "错误：", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
try
{
if (Int32.Parse(textBox_quantity.Text) <= 0)
{
MessageBox.Show("图书本书必须大于0！", "提示：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return;
}
}
catch (Exception)
{
MessageBox.Show("请输入正确的图书本书！", "错误：", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (textBox_bkBrief.Text == "")
{
MessageBox.Show("内容简介不能为空！", "提示：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return;
}
setBookInfo();
// 如果还存在未提交的添加图书操作，则bkID从未提交操作中获取！
int index = -1;
foreach (UserAction action in main.ActionList)
{
if (action.actionSource == "Book" && action.actionType == "Add")
{
Book tmp = (Book)action.actionModel;
index = tmp.bkID;
}
}
for (int i = 0; i < Int32.Parse(textBox_quantity.Text); i++)
{
if (index != -1)
{
textBox_bkID.Text = (index + 1).ToString();
}
GlobalObject.bookSource.bkID = Int32.Parse(textBox_bkID.Text) + i;
GlobalObject.actionSource.actionDescription = $"添加图书 {GlobalObject.bookSource.bkCode}(bkID:{GlobalObject.bookSource.bkID}) 。";
main.addAction(GlobalObject.actionSource);
}
this.Visible = false;
_instance = null;
this.Dispose();
}
private void bookAdd_FormClosing(object sender, FormClosingEventArgs e)
{
_instance = null;
this.Dispose();
}
private void btnCancel_Click(object sender, EventArgs e)
{
_instance = null;
this.Dispose();
}