Updating records in the database with asp net
This article is one in a series of articles on ASP. In particular, we look at enabling editing support in the Grid View. This article focuses on the Sql Data Source control; for a detailed look at updating with the Object Data Source, refer to the "Editing, Inserting, and Deleting" tutorials in my Working with Data in ASP. Let's explore the updating "action" for the Access Data Source and Sql Data Source controls in more detail.
NET 2.0 introduces three new data Web controls: the Grid View, the Details View, and the Form View.
Here, we will see how to update a single Student entity (not entity graph). In this way, we can easily update a single entity using DBContext in the disconnected mode. Entry method returns an instance of DBEntity Entry for a specified Entity.
An instance of Db Entity Entry class providea access to information about a given entity and its state.
I am able to access the database and insert new customer but it doesn't work when i try to update any record. thank you so much this is all my code You have two if statements that check if the query string is empty or null but not one that checks if it isn't.
Also notice in the code above, that we are accessing data as objects and properties.
Future installments will explore more advanced updating scenarios, such as customizing the Grid View's editing interface and programmatically setting the updated values. The UPDATE Table Name SET Column Name1 = @Parameter Value1 Column Name2 = @Parameter Value2 ...
Column Name N = @Parameter Value N WHERE Primary Key Column Name1 = @Primary Key Value To Update1 AND Primary Key Column Name2 = @Primary Key Value To Update2 AND ...
NET 2.0 introduced a number of new Web controls designed for accessing and modifying data. NET 2.0's data source controls make it possible to retrieve, insert, update, and delete data without having to write the tedious dedata access code that was so commonplace in ASP. Previous installments of this article series have looked at returning, inserting, and deleting data using the Sql Data Source control. These controls can work in unison with the data source controls to facilitate inserting, updating, and deleting data.
These controls allow page developers to declaratively access and modify data without writing any code to perform the data access. In this article we will examine basics of using the Sql Data Source and Grid View controls to update records from a database.