private Video objVideo          = null; //定义摄像头操作类
        public FrmBookManage()
        {
            InitializeComponent();

            #region 数据初始化
            var categorylist = bookManager.GetAllCategory();
            this.cbo_BookCategory.DataSource    = bookManager.GetAllCategory();
            this.cbo_BookCategory.DisplayMember = "CategoryName";
            this.cbo_BookCategory.ValueMember   = "CategoryId";
            this.cbo_BookCategory.SelectedIndex = -1; //默认不选中
            categorylist.Insert(0, new Category()
            {
                CategoryId = -1, CategoryName = ""
            });
            this.cboCategory.DataSource    = categorylist;
            this.cboCategory.DisplayMember = "CategoryName";
            this.cboCategory.ValueMember   = "CategoryId";
//            this.cboCategory.SelectedIndex = -1; //默认不选中
            this.cbo_Publisher.DataSource    = bookManager.GetAllPublisher();
            this.cbo_Publisher.DisplayMember = "PublisherName";
            this.cbo_Publisher.ValueMember   = "PublisherId";
            this.cbo_Publisher.SelectedIndex = -1; //默认不选中


            this.btnDel.Enabled = false;
            //禁用拍照
            this.btnTake.Enabled       = false;
            this.btnCloseVideo.Enabled = false;

            this.btnSave.Enabled = false;

            this.dgvBookList.AutoGenerateColumns = false;
            DataGridViewStyle.DgvStyle1(this.dgvBookList);
            #endregion
        }
        public FrmAddBook()
        {
            InitializeComponent();

            #region 数据初始化
            this.cboBookCategory.DataSource    = bookManager.GetAllCategory();
            this.cboBookCategory.DisplayMember = "CategoryName";
            this.cboBookCategory.ValueMember   = "CategoryId";
            this.cboBookCategory.SelectedIndex = -1; //默认不选中
            this.cboPublisher.DataSource       = bookManager.GetAllPublisher();
            this.cboPublisher.DisplayMember    = "PublisherName";
            this.cboPublisher.ValueMember      = "PublisherId";
            this.cboPublisher.SelectedIndex    = -1; //默认不选中
            //禁用拍照
            this.btnTake.Enabled                 = false;
            this.btnCloseVideo.Enabled           = false;
            this.dgvBookList.AutoGenerateColumns = false;
            DataGridViewStyle.DgvStyle1(this.dgvBookList);
            #endregion
        }