Class NamedParameterSql

This interface defines the properties necessary to execute a parameterized SQL query. It encapsulates the parameters and their values, enabling secure and efficient database operations.

Inheritance

System.Object

NamedParameterSql

Namespace: Syncfusion.Blazor.QueryBuilder

Assembly: Syncfusion.Blazor.dll

Syntax

public class NamedParameterSql : Object

Remarks

Implementations of this interface should ensure that parameterized queries are constructed correctly to prevent SQL injection attacks. Parameterized SQL queries allow for the separation of SQL code from user input, thereby reducing the risk of malicious SQL injection attacks. For example, consider the following parameterized SQL query in C#:

using System.Data.SqlClient;

Define the SQL query with parameters
string queryString = "SELECT * FROM Users WHERE Username = @Username AND Password = @Password"; ///
Establish connection and command objects
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand command = new SqlCommand(queryString, connection);

Set parameter values
command.Parameters.AddWithValue("@Username", username);
command.Parameters.AddWithValue("@Password", password);

Execute the query
connection.Open();
SqlDataReader reader = command.ExecuteReader(); /// while (reader.Read())
{
Process results 
}
}

In the above example, '@Username' and '@Password' are placeholders for the actual values of the username and password provided by the user. These placeholders are replaced with the user-supplied values at runtime. This approach mitigates the risk of SQL injection attacks since the user input is treated as data rather than executable SQL code.

Constructors

NamedParameterSql()

Declaration

public NamedParameterSql()

Properties

Params

Specifies the bind variable names from the SQL string to the associated values.

Declaration

public Dictionary<string, object> Params { get; set; }

Property Value

Type
System.Collections.Generic.Dictionary<System.String, System.Object>

Sql

Defines the SQL WHERE clause with bind variable placeholders for each value.

Declaration

public string Sql { get; set; }

Property Value

Type
System.String

Remarks

Using bind variable placeholders helps in separating SQL logic from data, enhancing security by preventing SQL injection attacks.

string sql = “SELECT * FROM Users WHERE Username = ? AND Password = ?”;