How to get value of under a column and total of them

 To get the values under a column and calculate their total in C#, you typically work with collections or databases, depending on your data source. Here, I'll provide examples for both scenarios:


1. Using a Collection (e.g., List or Array):


Assuming you have a collection like a List or an Array, you can use LINQ to retrieve the values under a specific column and calculate their total. Here's a simple example:


```csharp

using System;

using System.Collections.Generic;

using System.Linq;


class Program

{

    static void Main()

    {

        List<int> numbers = new List<int> { 1, 2, 3, 4, 5 };


        // Get the values under a column (in this case, it's the list itself)

        IEnumerable<int> columnValues = numbers;


        // Calculate the total

        int total = columnValues.Sum();


        Console.WriteLine("Values under the column: " + string.Join(", ", columnValues));

        Console.WriteLine("Total: " + total);

    }

}

```


2. Using a Database (e.g., SQL Server):


If you are working with a database, you'll typically use SQL to retrieve the values from a specific column and calculate their total. Here's a basic example using SQL Server:


```csharp

using System;

using System.Data.SqlClient;


class Program

{

    static void Main()

    {

        string connectionString = "Your_Connection_String";

        string query = "SELECT YourColumnName FROM YourTableName";


        using (SqlConnection connection = new SqlConnection(connectionString))

        {

            connection.Open();


            using (SqlCommand command = new SqlCommand(query, connection))

            {

                using (SqlDataReader reader = command.ExecuteReader())

                {

                    int total = 0;


                    while (reader.Read())

                    {

                        int columnValue = reader.GetInt32(0); // Assuming the column is of integer type

                        total += columnValue;

                    }


                    Console.WriteLine("Total: " + total);

                }

            }

        }

    }

}

```


Make sure to replace `"Your_Connection_String"`, `"YourColumnName"`, and `"YourTableName"` with your specific database connection details and column information.


These examples demonstrate how to get values under a column and calculate their total in C# for both in-memory collections and database scenarios. Adapt the code to your specific data source and column type as needed.

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