C# Simple operation SQLite & Asp.net 

SQLite is an embedded SQL database engine. Unlike most other SQL databases, SQLite doesn't have a separate server process. SQLite reads and writes on to ordinary disk files. an entire SQL database with multiple tables, indices, triggers, and views, is contained during a single computer file. The database file format is cross-platform – you'll freely copy a database between 32-bit and 64-bit systems or between big-endian and little-endian architectures. These features make SQLite a well-liked choice as an Application File Format. consider SQLite not as a replacement for Oracle but as a replacement for fopen()

This is what I want for an extended time. Working with asp.net and database all the time I needed something like this. Before I had to use office access but it's not good for the work I want to try to do.

After a while I found SQLite and now I start using it in my private, demo, test projects. For now, I'm very satisfied with it.

In this post I will show you simple operation with SQLite and asp.net :
Simple front design:

First, we need to copy some line of code in our web config project file:

The second thing is that we need to import Sqlite.dll into our project (after we download it.
We do reference to Sqlite .dll after that, we need to create one simple database which we can do with one of many SQLite managers.

The next step is to import our database in the project App_Data folder:
Then we need to write the connection string :

After that, we add some code instruction to add and delete values from our database :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SQLite;
using System.Data.Common;
using System.Data;
using System.IO;
public partial class _Default : System.Web.UI.Page
{
    private SQLiteConnection sql_con;
    private SQLiteCommand sql_cmd;
    private SQLiteDataAdapter DB;
    private DataSet DS = new DataSet();
    private DataTable DT = new DataTable();
    protected void Page_Load(object sender, EventArgs e)
    {
        LoadData();
    }
    private void SetConnection()
    {
    sql_con = new SQLiteConnection (“Data source=”+HttpContext.Current.Server.MapPath(“App_Data\phone.sqlite”)+”;   
    Version=3;New=False;Compress=True;”);
    }
    private void ExecuteQuery(string txtQuery)
    {
        SetConnection();
        sql_con.Open();
        sql_cmd = sql_con.CreateCommand();
        sql_cmd.CommandText = txtQuery;
        sql_cmd.ExecuteNonQuery();
        sql_con.Close();
    }
    private void LoadData()
    {
        SetConnection();
        sql_con.Open();
        sql_cmd = sql_con.CreateCommand();
        string CommandText = “SELECT * FROM phonebook”;
        DB = new SQLiteDataAdapter(CommandText, sql_con);
        DS.Reset();
        DB.Fill(DS);
        DT = DS.Tables[0];
        GridView1.DataSource = DT;
        GridView1.DataBind();
        sql_con.Close();
    }
    private void Add(string name,string number)
    {
        string txtSQLQuery = “insert into  phonebook (name,number ) values (‘” + name + “‘,’”+number+”‘)”;
        ExecuteQuery(txtSQLQuery);
        LoadData();
    }
    private void Delete(string name)
    {
        string txtSQLQuery = “delete from phonebook where name=’” + name + “‘”;
        ExecuteQuery(txtSQLQuery);
        LoadData();
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Add(TextBox1.Text, TextBox2.Text);
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        Delete(TextBox3.Text);
        LoadData();
    }
}