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What are Stored Procedures in ADO.NET and why should you use them?

Updated Apr 22, 2026

Short answer

Stored procedures are precompiled SQL statements stored in the database and executed via ADO.NET using SqlCommand.

Deep explanation

What are Stored Procedures:

SQL logic saved in the database
Executed using CommandType.StoredProcedure

Advantages:

Improved performance (precompiled execution plans)
Enhanced security (parameterized execution)
Reduced network traffic

How ADO.NET Uses Them:

SqlCommand calls stored procedure
Parameters passed using SqlParameter

Comparison:

Inline SQL → flexible but risky
Stored Procedures → secure and optimized

Real-world example

💻 Code Example

CSHARP

1using System;
2using System.Data;
3using System.Data.SqlClient;
4
5class Program
6{
7    static void Main()
8    {
9        string connectionString = "your_connection_string";
10
11        using (SqlConnection con = new SqlConnection(connectionString))
12        {
13            con.Open();
14
15            SqlCommand cmd = new SqlCommand("GetUserById", con);
16            cmd.CommandType = CommandType.StoredProcedure;
17
18            cmd.Parameters.AddWithValue("@Id", 1);
19
20            SqlDataReader reader = cmd.ExecuteReader();
21
22            while (reader.Read())
23            {
24                Console.WriteLine(reader["Name"]);
25            }
26        }
27    }
28}