private void FrmMain_Load(object sender, EventArgs e)
{
this.toolStripStatusLabel.Text = "状态：" + admin.LoginType + "\"" + admin.LoginId + "\"已登录.";
// 图书管理窗体的绑定
book = new BookInfoManager_UI();
Control.CheckForIllegalCrossThreadCalls = false;
banding(book, tabPage1);
// 读者管理窗体的绑定
reader = new ReaderManager_UI();
reader.book = book;
banding(reader, tabPage2);
// 借还历史记录窗体的绑定
banding(new BorrowHostory_UI(), tabPage3);
}