Dynamic operation of SQL Server databases in Visual C #

When writing a database application, we can dynamically create, modify, and target the database through SQL statements. In this article, I'll show you how to use Visual C # to dynamically manipulate SQL Server databases, including how to create a SQL Server database and how to create database objects such as tables, stored procedures, views, indexes, and so on. This article also describes how to dynamically modify the schema of a table, read data from tables, stored procedures, and views, and display it in the application's database controls.

We know that SQL statements manipulate the database most of the operations of Select, Insert, update, and delete for data, and this article focuses on the operation of the database and its objects. By mastering these basic methods of operation, readers will be more flexible in the development of database applications.

Development examples and procedures

1. Interface design:

This article introduces you to an instance of using Visual C # Dynamic operations database, as shown in Figure 1.

Figure 1

From the illustration above, our instance program contains only 10 button controls and one DataGrid control. button controls fall into three categories:

The first category is to create a database and a Database object button;

The second category is a button that looks at data in different database objects;

The third category is the button that modifies the database object. The DataGrid control is used to display the data.

2. To add a reference and data member:

After designing the interface, we can start writing program code. The first is to add the necessary references and some data members to our program. Because our program involves access to the database, it must be applied to the object of the data provider (Provider). Under the. NET Framework, the data providers we use mainly fall into two categories: one is SQL type and the other is OLE DB type. The namespaces they involve are System.Data.SqlClient and System.Data.OleDb respectively. Because our program accesses a SQL Server database, the data provider object we use should be of SQL type. The reason is simple, the type of object is designed specifically for SQL Server databases, so performance is greatly optimized. So, at the beginning of our program, add the following sentence: