Updating database using asp
ASP gives you many possibilities for adding interactivity to your web site.
The first argument is of type Object and represents the Grid object which triggered the event.
The second argument is of type Grid Record Event Args and contains the data that must be stored in the database.
C# void Delete Record(object sender, Grid Record Event Args e) void Update Record(object sender, Grid Record Event Args e) void Insert Record(object sender, Grid Record Event Args e) void Rebind Grid(object sender, Event Args e) Sub Delete Record(sender As Object, e As Grid Record Event Args) Dim db As New Northwind Data Context() Dim cust = (From c In db.
C# // Instantiate the Customer class using the default constructor Customer customer = new Customer(); // Assign some of its properties customer. First Name = "Jeff"; // Call its Create() method to save the values in the database, // and get its new primary key (Customer ID) value int customer ID = customer. Delete(); ' Instantiate the Customer class using the default constructor Dim customer As New Customer() ' Assign some of its properties customer. First Name = "Jeff" ' Call its Create() method to save the values in the database, ' and get its new primary key (Customer ID) value Dim customer ID As Integer = customer. Delete() You can see by these few lines of code that we didn't go through the entire process of creating connection, command, and other data objects.
Create(); // Instantiate the Customer class using the constructor that takes // the Customer ID as a parameter Customer customer2 = new Customer(customer ID); Trace. Create() ' Instantiate the Customer class using the constructor that takes ' the Customer ID as a parameter Dim customer2 As New Customer(customer ID) Trace. A few simple method calls are all we need to manipulate the data.
(In all fairness, you get back much of your time when data binding!
Luckily, there is a shortcut you can use to clean up this process.In previous lessons, you have learned to retrieve, insert and delete data from a database.In this lesson, we will look at how to update a database, i.e. The syntax for an SQL statement that updates the fields in a table is: With the knowledge you now have from the lessons 19, 20 and 21, it should be quite easy to understand how the above syntax is used in practice. The code below updates Donald Duck's first name to D.We're going to combine data container classes and data access into one package.That isn't wrong per se, and in fact it might be just what you need in your own application.A class encapsulates some kind of functionality into one neat and simple package.Many Web coders who have used other platforms such as PHP or Cold Fusion are a little surprised at the number of steps required to get data in and out of a database in . Just to get a few values out of the database, you need to create a connection object, a command object, and then at the very least a .We also know that we want to create, update, and delete records in this table.The most obvious need we'll have is to get data from the table.None of the columns in our table allows null values. The difference is that nvarchar uses Unicode, the generally accepted standard of character encoding that includes a much larger character set.Using Unicode in your Web application means there's less chance of getting weird characters generated by users in other countries.