If those values are "mike" and "pass1" respectively, the generated SQL will be: select * from users where username = 'mike' and password = 'pass1' They are concatenated with the SQL to generate the command that is executed. The username and password variables represent the values submitted by the user. A vulnerable SQL statement designed to check that submitted credentials against those stored in the database might look like this: var sql = "select * from users where username = '" + username + "' and password = '" + password + "'" If a valid combination is presented, the user is authorised to access protected parts of the application. Typically, a login form is designed to accept a user name and a password that uniquely identifies an individual. The canonical example used to illustrate the issue involves a login form. The user input has been crafted specifically to alter the SQL that the program's designer intended to execute.
SQL injection occurs usually as a result of taking user input and concatenating it with hard coded SQL statements that form part of an application's code base. SQL Injection is a technique that results in unauthorised SQL commands being executed against your database. Var result = await con.QueryAsync(spName, param, commandType: you want to pass ad hoc or user supplied values to your SQL command at run time, it is important to use parameters to represent them in order to prevent the possibility of your application being exposed to SQL injection attacks. Using (var con = new SqlConnection(_connections.DefaultConnection)) Then you have create your method in your code for get data with Dapper and stored procedure : public async Task> getAllData(string spName, DynamicParameters param) first type like this query in SQL and create your procedure: CREATE PROCEDURE intįETCH NEXT 25 (display 25 rows per page) ROWS ONLY If you want use pagination in dapper, You can use OFFSET and FETCH.
The down-side is that since we have generic arguments, we must also write POCOs for our DB classes and not all developers like to spend time on that. If (string.IsNullOrEmpty(sql) || pageNumber (sql, new Dictionary Ī more entensive variant of this approach could also build up a method to get an IEnumerable of IEnumerables using a DB Cursor and wrapping the logic used here, but my approach is a basic demonstration of a sturdy predictable type-safe solution, and not relying on the more flexible dynamic approach. String sql, int pageNumber, int pageSize, bool sortAscending = true)
Public static IEnumerable GetPage(this IDbConnection connection, Expression> orderByMember, True means ascending, false means descending / The select clause sql to use as basis for the complete paging / The type of ienumerable to return and strong type to return upon / The parameter specified which property member to sort the collection by. / Note: When sorting with set to false, you will at the first page get the last items. The method relies on the 'FETCH NEXT' and 'OFFSET' methods / Fetches page with page number with a page size set to. This relies on FETCH NEXT and OFFSET, which means you need SQL Server 2012 or more recent. I created a generic method with strongly type arguments to get a reusable solution.