Declaring SqlConnection throughout one form

Question

I\'m looking for some advise on C# - Please bare in mind that i\'m only a beginner with C# & Sql.

I am looking to design a small program that will Add/Edit/Dele

Answer 1

Consider to declare your SqlConnection as field of your main form (if you don't want to use it on any other form).

Note: Add reference to System.Configuration assembly in order to use ConfigurationManager class.

Example:

public partial class MainMenu : Form
{
    SqlConnection _myConnection;

    public Form1()
    {
        InitializeComponent();

        this._myConnection = new SqlConnection(ConfigurationManager.ConnectionStrings[0].ConnectionString);
    }

    public void ExecuteAQueryExample()
    {
        if (this._myConnection.State != ConnectionState.Open) this._myConnection.Open();

        using (var command = this._myConnection.CreateCommand())
        {
            // ...
        }

        this._myConnection.Close();
    }
}