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Dataadapter update not updating database

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Therefore, the and Ole Db Connection, to select records from an Access data source, and populate a Data Set with the selected rows. To accomplish this, the method is passed an initialized Data Set, a connection string, and a query string that is an SQL SELECT statement.Data Reader Data Reader is used to read the data from database and it is a read and forward only connection oriented architecture during fetch the data from database.Dataadapter is a disconnected oriented architecture.

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Note that some OLE DB providers, including the MSData Shape provider, do not return base table or primary key information.

To bind Data Reader data to Grid View we need to write the code like as shown below: Data Set Data Set is a disconnected orient architecture that means there is no need of active connections during work with datasets and it is a collection of Data Tables and relations between tables. You can select data form tables, create views based on table and ask child rows over relations.

Also Data Set provides you with rich features like saving data as XML and loading XML data.

Updates the values in the database by executing the respective INSERT, UPDATE, or DELETE statements for each inserted, updated, or deleted row in the specified array in the Data Set.(Inherited from Db Data Adapter.)Updates the values in the database by executing the respective INSERT, UPDATE, or DELETE statements for each inserted, updated, or deleted row in the Data Set with the specified Data Table name.(Inherited from Db Data Adapter.)Updates the values in the database by executing the respective INSERT, UPDATE, or DELETE statements for each inserted, updated, or deleted row in the specified Data Table.(Inherited from Db Data Adapter.) fills a Data Set, it will create the appropriate tables and columns for the returned data if they do not already exist.

However, primary key information is not included in the implicitly created schema unless the create the schema of the Data Set, including primary key information, before filling it with data using Fill Schema.