C# – Sql Parameters – Insert Statement

Posted by on Friday, December 4, 2009 · Leave a Comment 

C# – Sql Parameters Source Code – Insert Statement

Purpose: – Illustrates using Sql Parameters with Insert Statement.
Prerequistes:

  1. Install Visual Studio 2022
  2. Watch this video to enable web forms in Visual Studio 2022 Enable Web Forms websites in Visual Studio 2022
  3. Install SQL Server Express
  4. Download Northwind Database
  5. Attach Northwind Database to Databases in Sql Express

Notes:

  • Console Application is used to simplify things, but Windows Forms or Web Forms could also be used
  • You can build a library of syntax examples by using same project over and over and just commenting out what you do not want to execute in Program.cs

Instructions:

  1. Use C# 2008 (Express or Standard) Edition
  2. Create new project; select Console Application; name of Project could be CSharp_Syntax.
  3. Right-click project name in solution explorer; add new folder; name of folder could be DatabaseADONET
  4. Right-click folder; add class; class name could be clsSqlParametersInsert.cs
  5. Copy code into clsSqlParametersInsert.cs
  6. Copy code into Program.cs
  7. Click green arrow to start with debugging

Step 1: Use View Plain to Cut-n-paste code into clsSqlParametersInsert.cs

using System;
using System.Data;
using System.Data.SqlClient;
 
class clsSqlParametersInsert
{
 
    public void Main()
    {
        SqlConnection thisConnection = new SqlConnection("server=.\\SQLEXPRESS;" + "integrated security=sspi;database=Northwind");
 
        //Create Command object
        SqlCommand nonqueryCommand = thisConnection.CreateCommand();
 
        try
        {
            // Open Connection
            thisConnection.Open();
            Console.WriteLine("Connection Opened");
 
            // Create INSERT statement with named parameters
            nonqueryCommand.CommandText = "INSERT  INTO Employees (FirstName, LastName) VALUES (@FirstName, @LastName)";
 
            // Add Parameters to Command Parameters collection
            nonqueryCommand.Parameters.Add("@FirstName", SqlDbType.VarChar, 10);
            nonqueryCommand.Parameters.Add("@LastName", SqlDbType.VarChar, 20);
 
            // Prepare command for repeated execution
            nonqueryCommand.Prepare();
 
            // Data to be inserted
            string[] names = { "Wade", "David", "Charlie" };
            for (int i = 0; i <= 2; i++)
            {
                nonqueryCommand.Parameters["@FirstName"].Value = names[i];
                nonqueryCommand.Parameters["@LastName"].Value = names[i];
 
                Console.WriteLine("Executing {0}", nonqueryCommand.CommandText);
                Console.WriteLine("Number of rows affected : {0}", nonqueryCommand.ExecuteNonQuery());
            }
        }
        catch (SqlException ex)
        {
            // Display error
            Console.WriteLine("Error: " + ex.ToString());
        }
        finally
        {
            // Close Connection
            thisConnection.Close();
            Console.WriteLine("Connection Closed");
 
        }
 
        Console.ReadLine();
 
    }
 
}

Step 2: Use View Plain to Cut-n-paste code into Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace CSharp_Syntax
{
class Program
{
static void Main(string[] args)
{
//DatabaseADONET
 
clsSqlParametersInsert mySqlParametersInsert = new clsSqlParametersInsert();
mySqlParametersInsert.Main();
 
}
}
}

Filed under Code Samples · Tagged with , , , ,