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DataRelation

  • 网络关系；数据集表之间的关系；数据关系

DataRelationDataRelation
网络释义

DataRelation

关系

比如通过表之间的关系（DataRelation），获取父表或子表中的记录，或者对父表或子表中的记录进行统计运算，以及计算字段 …

数据集表之间的关系

也可以在设计时创建数据集表之间的关系（DataRelation 对象）。在窗体或组件中，选择数据集并打开“属性”窗口。

数据关系

表之间追加下面的代码以创建数据关系 （使用 DataRelation）： ' Create Relationship between Tables Dim drRelation As Data…

数据表关联

拥有数据表（DataTable）数据表关联（DataRelation）。DataSet中可以存储多张表等。

表之间的主从关系

ADO.net基础 - linux - Cisco网络技术 ... Constraint: 约束 DataRelation: 表之间的主从关系 (3)数据读取器( DataReader) ...

数据关系对象

　　（3）数据关系对象（DataRelation） 　　数据关系对象代表通过共享列而发生关系的两个表之间的关系。 　　四、应用实例 　　4.1 设计思 …

表间关系

.NET Windows应用开发教程-新书城 ... 12.3.1 数据表 DataTable 418 12.3.2 表间关系 DataRelation 426 ...

例句：
1
The column will be an auto-incrementing primary key for the parent table, and will be used for the DataRelation between the two tables.
2
A DataRelation identifies matching columns in two tables of a DataSet.
3
The first argument in the example specifies the name of the DataRelation being created.
4
The name by which you can refer to this DataRelation object in code.
5
The DataMember property is set to FK_Orders_Customers, which is the name of the DataRelation object that relates the tables together.
6
The DataSet consists of a collection of DataTable objects that you can relate to each other with DataRelation objects.
7
Gets the child rows of a DataRow using the specified DataRelation, and DataRowVersion.
8
In a DataSet, the collection of all parent DataRelation objects for the data set is returned by the GetParentRows method.
9
Describes the DataRelation and ForeignKeyConstraint objects created for nested, inferred tables.
10
Represents the collection of DataRelation objects for this DataSet.
11
The following example uses the GetChildRows to return the child DataRow objects for every child DataRelation in a DataTable.
12
In the example, the createConstraints flag is set to false for the DataRelation between the Orders table and the OrderDetails table.
13
A DataRelationCollection that contains a collection of DataRelation objects.
14
The DataTable also contains a collection of DataRelation objects, returned by the ParentRelations property.
15
A relationship, represented by the DataRelation object, associates rows in one DataTable with rows in another DataTable.
16
The following code example creates a DataRelation using two DataTable objects in a DataSet.
17
For more information about DataRelation objects, see Introduction to DataRelation Objects.
18
Occurs when a DataRelation object is removed from a DataTable.
19
20
After you have created a DataRelation, you can use it to navigate between tables and to retrieve values.

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