C#操作SQLite数据库

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
using System;
using System.Data.SQLite;
namespace SQLiteSamples
{
class Program
{
//数据库连接
SQLiteConnection m_dbConnection;
static void Main(string[] args)
{
Program p = new Program();
}
public Program()
{
createNewDatabase();
connectToDatabase();
createTable();
fillTable();
printHighscores();
}
//创建一个空的数据库
void createNewDatabase()
{
SQLiteConnection.CreateFile("MyDatabase.sqlite");
}
//创建一个连接到指定数据库
void connectToDatabase()
{
m_dbConnection = new SQLiteConnection("Data Source=MyDatabase.sqlite;Version=3;");
m_dbConnection.Open();
}
//在指定数据库中创建一个table
void createTable()
{
string sql = "create table highscores (name varchar(20), score int)";
SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
command.ExecuteNonQuery();
}
//插入一些数据
void fillTable()
{
string sql = "insert into highscores (name, score) values ('Me', 3000)";
SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
command.ExecuteNonQuery();
sql = "insert into highscores (name, score) values ('Myself', 6000)";
command = new SQLiteCommand(sql, m_dbConnection);
command.ExecuteNonQuery();
sql = "insert into highscores (name, score) values ('And I', 9001)";
command = new SQLiteCommand(sql, m_dbConnection);
command.ExecuteNonQuery();
}
//使用sql查询语句，并显示结果
void printHighscores()
{
string sql = "select * from highscores order by score desc";
SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
SQLiteDataReader reader = command.ExecuteReader();
while (reader.Read())
Console.WriteLine("Name: " + reader["name"] + "tScore: " + reader["score"]);
Console.ReadLine();
}
}
}