typed dataset

In contrast, the LINQ to DataSet is the smallest piece of LINQ technology, although it is an off-line operation model extracted from the DB, but after all, the object is also a memory of an object. So most of the operations are the same as LINQ to object, except that the fields are marked according to the structure of the dataset,datatable. The following is a simple list of the features that LINQ to

Difference between DataRead and DataSet: datareaddatasetDifference between DataRead and DataSet Dataset indicates a dataset, which is cached in memory. Can contain multiple tablesDatSet is non-connection-oriented when connecting to the database. Read all tables to the SQL Buffer Pool and disconnect from the database. D

Dataset is a method used to connect to SQL. It means to store database copies in an application. When an application starts running, it saves database-related data to dataset. Datatable indicates a table with data in memory. You can use view to obtain a custom view of a table that may include a filtering view or a cursor position. The datareader object is the simplest way to read the database. It can only r

This article mainly introduces the use of Datatable,dataset, attribute summary type, so only throw emphasis. About Datatable,dataset Here is a brief description: The DataSet is a dataset, it can contain a DataTable, and the relationships between the data tables, the DataTable is a datasheet, a column of columns, rows,

Use of a strongly Typed Dataset: 1 project --> new item --> data --> dataset --> *. XSD file --> drag and drop the database file Dataset Designer window in the server resource manager. The system will automatically generate the fill and getdata () methods, that is, the Select * from table name in the database query. 2.

database. In Server Explorer, expand the Northwind data connection until you can see all the tables. Creating data Adapters and connections This step creates connections and data adapters that are used to connect and exchange data between applications and data sources. Creating data Adapters and connections Drag the Customers table from the Server Explorer (Server Explorer) onto the form. The connection and data adapters are displayed in the component tray. Select Connection (Connect) and set

5.2 implement complex data query using LINQ to DatasetLINQ to dataset integrates LINQ with ADO. net. It obtains data through ADO. NET and then queries data through LINQ, so as to perform complex queries on the dataset. This section describes how to use LINQ to dataset to operate data in a dataset. 5.2.1 use LINQ to Dat

How to use the data adapter SqlDataAdapter to retrieve data from the database SQL Server and populate it with the dataset:Methods to get data sets Private DataSet GetDataSet (){String Strcon = @ "Data source=./sqlexpress;initial catalog=school;uie=sa;pwd=123456";SqlConnection con = new SqlConnection (Strcon);String sql = "SELECT * from student";DataSet ds = new DataSet