What are the problems related to ADO.NET parameters?
This article mainly introduces "what are the problems related to ADO.NET parameters". In the daily operation, I believe many people have doubts about the problems related to ADO.NET parameters. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "what are the problems related to ADO.NET parameters?" Next, please follow the editor to study!
Stored procedures have been a data access method for enterprise application development for some time. Stored procedures are more secure, encapsulate, and perform complex logic without disrupting application code. However, the ADO.NET parameter also has some disadvantages:
◆ developers tend to add business logic to stored procedures.
The development environment must be changed when ◆ changes the process
The parameters required by the ◆ lookup process are time-consuming
In many cases, stored procedures provide more functionality than needed in ◆
Inline SQL code embedded in application code is another common method of data access. Although this approach is rarely used by enterprises in the development process, many small projects apply this type of data access method. The application of inline SQL can achieve rapid development, but it does not have the security and encapsulation advantages of stored procedures.
The parameterized query is between the stored procedure and the inline SQL. It provides a secure, encapsulated method for data access program development, and allows you to take advantage of the rapid development of inline ADO.NET parameters. How to apply parameterized queries is not so easy. For example, the following code (figure A) shows how to write a parameterized query:
In this example, we select all users with the specified CustomerID. Note that this process is very similar to writing Select statements in a stored procedure. The difference is that you embed it directly into your application code or source file. (we'll talk about the source files later. )
To enable the ADO.NET parameter to migrate the @ CustomerID parameter, you simply create a normal SqlParameter and add it to the SqlCommand.Parameters set of the current command. You can then execute the command on the desired connection, and the ADO.NET parameter establishes the command executed on the SQL server. The following code snippet (figure B) is an example of how to create and execute the entire command:
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