Updating data in database in asp net

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In SQL Server 2008, you can perform insert, update, or delete operations in a single statement using the MERGE statement.

The MERGE statement allows you to join a data source with a target table or view, and then perform multiple actions against the target based on the results of that join.

Now that you have some idea about data annotation attributes, let's develop a simple ASP.

NET MVC application that makes use of these attributes for data validation. NET MVC project and select the Empty project template.

For example, you can use the MERGE statement to perform the following operations: It is important to understand how the source and target data are merged into a single input stream and how additional search criteria can be used to correctly filter out unneeded rows.

Otherwise,you might specify the additional search criteria in a way that produces incorrect results.

NET Web API project but same steps can be applied on other ASP. First define connection string in web.config: In above code, On Sql Dependency On Change event, we are calling Job Hub’s show method to refresh the grid. Rows in the source are matched with rows in the target based on the join predicate specified in the ON clause. One insert, update, or delete operation is performed per input row.Depending on the WHEN clauses specified in the statement, the input row might be any one of the following: The combination of WHEN clauses specified in the MERGE statement determines the join type that is implemented by the query processor and affects the resulting input stream.All of the above attributes also allow you to specify an error message that is displayed in the event of an error.If an error message is not specified, a default error message is displayed.Data duplication may make your SELECT queries easier to write, but you can very easily end up with data integrity issues. FROM Tickets INNER JOIN Ticket Templates ON Tickets.

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