SQLite笔记

一、SQLite下载:

http://www.sqlite.org/download.html (或在NuGet下载安装)

二、SQLite操作:

  1、添加引用System.Data.SQLite,如安装目录在E:\Program Files\System.Data.SQLite\2010\bin,则找到System.Data.SQLite.dll引用到当前项目中;

using System.Data.SQLite;

  2、进行简单增删改查操作,语法跟sql server相差不大

 public class UseSQLIte
{
SQLiteConnection m_dbConnection;
public UseSQLIte()
{
createNewDatabase();
connectToDatabase();
createTable();
fillTable();
ShowInfo();
} //创建一个空的数据库
void createNewDatabase()
{
SQLiteConnection.CreateFile("SqliteDemo");
} //建立连接
bool connectToDatabase()
{
try
{
m_dbConnection = new SQLiteConnection("Data Source=SqliteDemo;Version=3;");
m_dbConnection.Open();
return true;
}
catch
{
return false;
}
} //创建表
void createTable()
{
string sql = "create table OnePiece(name VARCHAR(20), Reward BIGINT)";
SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
command.ExecuteNonQuery();
} //插入数据
void fillTable()
{
string sql = "insert into OnePiece (name, Reward) values ('路飞', 5000000000)";
SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
command.ExecuteNonQuery(); sql = "insert into OnePiece (name, Reward) values ('索隆', 3000000000)";
command = new SQLiteCommand(sql, m_dbConnection);
command.ExecuteNonQuery(); sql = "insert into OnePiece (name, Reward) values ('山治', 2000000000)";
command = new SQLiteCommand(sql, m_dbConnection);
command.ExecuteNonQuery(); sql = "insert into OnePiece (name, Reward) values ('乔巴', 100)";
command = new SQLiteCommand(sql, m_dbConnection);
command.ExecuteNonQuery();
} //查询语句,并显示结果
void ShowInfo()
{
string sql = "select * from OnePiece order by Reward desc";
SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
using (SQLiteDataReader reader = command.ExecuteReader())
{
while (reader.Read())
Console.WriteLine("姓名: " + reader["name"] + "\t赏金: " + reader["Reward"]);
}
Console.ReadLine();
} bool check(string tableName)
{
string sql = "select count(*) from sqlite_master where type='table' and name ='" + tableName + "'";
SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
int i = Convert.ToInt32(command.ExecuteScalar());
return i > ;
}
}

  3、效果显示:

SQLite笔记

三、资源收录

Sqlite全面学习(一、二、三)

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