对
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Dataset,Datatable,Datareder,DataADapter 有什么联系?
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下列关于DataSet的组成部分说法不正确的是( )。A.DataSet主要由数据表(DataTable)和关系(DataRelation)组成B.DataSet所包含的数据表由DataSet的属性Tables管理,通过Tables属性来访问C.DataColumn对象和DataRow对象分别定义了数据表DataTable中行和列的属性D.Contraint类表示可以在一个或多个DataColumn对象上实施的约束
多个事件源可以注册同一个监听器,一个事件源也可能注册多个监听器。()此题为判断题(对,错)。
如果要给DataTable添加约束但是不添加数据,需要使用()。A、数据适配器的FillSchema方法B、DataTable的FillSchema方法C、DataTable的Fill方法D、DataSet的FillSchema方法E、数据适配器的Fill方法。
同一个DataTable可以属于多个DataSet。
You are implementing an ASP.NET page. The page includes a method named GetCustomerOrderDataSet that returns a DataSet. The DataSet includes a DataTable named CustomerDetailsTable and a DataTable named OrderDetailsTable. You need to display the data in OrderDetailsTable in a DetailsView control named dtlView. Which code segment should you use?()A、 dtlView.DataSource = GetCustomerOrderDataSet(); dtlView.DataMember = "OrderDetailsTable"; dtlView.DataBind();B、dtlView.DataSource = GetCustomerOrderDataSet(); dtlView.DataSourceID = "OrderDetailsTable"; dtlView.DataBind();C、dtlView.DataSource = GetCustomerOrderDataSet(); dtlView.DataKeyNames = new string [] { "OrderDetailsTable"}; dtlView.DataBind();D、DataSet dataSet = GetCustomerOrderDataSet(); dtlView.DataSource = new DataTable("dataSet", "OrderDetailsTable"); dtlView.DataBind();
单选题You are implementing an ASP.NET page. The page includes a method named GetCustomerOrderDataSet that returns a DataSet. The DataSet includes a DataTable named CustomerDetailsTable and a DataTable named OrderDetailsTable. You need to display the data in OrderDetailsTable in a DetailsView control named dtlView. Which code segment should you use?()AdtlView.DataSource = GetCustomerOrderDataSet(); dtlView.DataMember = OrderDetailsTable; dtlView.DataBind();B dtlView.DataSource = GetCustomerOrderDataSet(); dtlView.DataSourceID = OrderDetailsTable; dtlView.DataBind();C dtlView.DataSource = GetCustomerOrderDataSet(); dtlView.DataKeyNames = new string [] { OrderDetailsTable}; dtlView.DataBind();D DataSet dataSet = GetCustomerOrderDataSet(); dtlView.DataSource = new DataTable(dataSet, OrderDetailsTable); dtlView.DataBind();