private void btnCancel_Click(object sender, EventArgs e)
{
this.Visible = false;
this.DialogResult = DialogResult.Cancel;
_instance = null;
this.Dispose();
}
private void bookDetail_Load(object sender, EventArgs e)
{
Book temp = bookDetailControler.GetBookbybkID(bookSearch.bkID);
if (temp == null)
{
temp = bookDetailControler.GetBookbybkID(bookSearch_reader.bkID);
readonlymode();
}
if (temp == null)
{
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();
return;
}
textBox_bkID.Text = temp.bkID.ToString();
textBox_bkCode.Text = temp.bkCode;
textBox_bkName.Text = temp.bkName;
textBox_bkAuthor.Text = temp.bkAuthor;
textBox_bkPress.Text = temp.bkPress;
dTP_bkDatePress.Value = temp.bkDatePress;
textBox_bkISBN.Text = temp.bkISBN;
comboBox_bkCatalog.SelectedIndex = Int32.Parse(temp.bkCatalog);
comboBox_bkLanguage.SelectedIndex = temp.bkLanguage;
textBox_bkPages.Text = temp.bkPages.ToString();
textBox_bkPrice.Text = temp.bkPrice.ToString();
dTP_bkDateIn.Value = temp.bkDateIn;
textBox_bkBrief.Text = temp.bkBrief;
pic_bkCover.Image = bookDetailControler.ByteToImage(temp.bkCover);
comboBox_Status.SelectedItem = temp.bkStatus;
}
private static bookDetail _instance = null; // 单例模式
public static bookDetail CreateInstance()
{
if (_instance == null)
{
_instance = new bookDetail();
}
return(_instance);
}
private void bookDetail_FormClosing(object sender, FormClosingEventArgs e)
{
_instance = null;
this.Dispose();
}
private void btnChange_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;
}
if (textBox_bkBrief.Text == "")
{
MessageBox.Show("内容简介不能为空！", "提示：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return;
}
setBookInfo();
// 如果该图书还存在未提交的修改图书操作，报错！
foreach (UserAction action in main.ActionList)
{
if (action.actionSource == "Book" && action.actionType == "Update")
{
Book tmp = (Book)action.actionModel;
if (tmp.bkID == GlobalObject.bookSource.bkID)
{
MessageBox.Show("对当前图书的修改操作已存在于操作队列！", "错误：", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
}
}
main.addAction(GlobalObject.actionSource);
this.Visible = false;
this.DialogResult = DialogResult.OK;
_instance = null;
this.Dispose();
}
