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.
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.
Can I put Contact Last Name is my where clause like string str = "UPDATE Customers SET Contact First Name = ?
updating is usually done with a primary key and in your case the customer-id is what you will need for updates.
In a previous article, we saw how to Create an Entity Framework Model and Use it in Multiple Projects.
In this article, we will see how to Add, Update and Delete objects in our conceptual model and push the changes to the underlying database.
Your first check needs to be If there are no errors and the code runs then there is something wrong with the SQL statement.