直接看代码
复制代码 代码如下:
using System;
using System.Configuration;
using MySql.Data.MySqlClient;
/// <summary>
/// TestDatebase 的摘要说明
/// </summary>
public class TestDatebase
{
public TestDatebase()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
public static void Main(String[] args)
{
MySqlConnection mysql = getMySqlCon();
//查询sql
String sqlSearch = "select * from student";
//插入sql
String sqlInsert = "insert into student values (12,'张三',25,'大专')";
//修改sql
String sqlUpdate = "update student set name='李四' where id= 3";
//删除sql
String sqlDel = "delete from student where id = 12";
//打印SQL语句
Console.WriteLine(sqlDel);
//四种语句对象
//MySqlCommand mySqlCommand = getSqlCommand(sqlSearch, mysql);
//MySqlCommand mySqlCommand = getSqlCommand(sqlInsert, mysql);
//MySqlCommand mySqlCommand = getSqlCommand(sqlUpdate, mysql);
MySqlCommand mySqlCommand = getSqlCommand(sqlDel, mysql);
mysql.Open();
//getResultset(mySqlCommand);
//getInsert(mySqlCommand);
//getUpdate(mySqlCommand);
getDel(mySqlCommand);
//记得关闭
mysql.Close();
String readLine = Console.ReadLine();
}
/// <summary>
/// 建立mysql数据库链接
/// </summary>
/// <returns></returns>
public static MySqlConnection getMySqlCon()
{
String mysqlStr = "Database=test;Data Source=127.0.0.1;User Id=root;Password=root;pooling=false;CharSet=utf8;port=3306";
// String mySqlCon = ConfigurationManager.ConnectionStrings["MySqlCon"].ConnectionString;
MySqlConnection mysql = new MySqlConnection(mysqlStr);
return mysql;
}
/// <summary>
/// 建立执行命令语句对象
/// </summary>
/// <param name="sql"></param>
/// <param name="mysql"></param>
/// <returns></returns>
public static MySqlCommand getSqlCommand(String sql,MySqlConnection mysql)
{
MySqlCommand mySqlCommand = new MySqlCommand(sql, mysql);
// MySqlCommand mySqlCommand = new MySqlCommand(sql);
// mySqlCommand.Connection = mysql;
return mySqlCommand;
}
/// <summary>
/// 查询并获得结果集并遍历
/// </summary>
/// <param name="mySqlCommand"></param>
public static void getResultset(MySqlCommand mySqlCommand)
{
MySqlDataReader reader = mySqlCommand.ExecuteReader();
try
{
while (reader.Read())
{
if (reader.HasRows)
{
Console.WriteLine("编号:" + reader.GetInt32(0) + "|姓名:" + reader.GetString(1) + "|年龄:" + reader.GetInt32(2) + "|学历:" + reader.GetString(3));
}
}
}
catch (Exception)
{
Console.WriteLine("查询失败了！");
}
finally
{
reader.Close();
}
}
/// <summary>
/// 添加数据
/// </summary>
/// <param name="mySqlCommand"></param>
public static void getInsert(MySqlCommand mySqlCommand)
{
try
{
mySqlCommand.ExecuteNonQuery();
}
catch (Exception ex)
{
String message = ex.Message;
Console.WriteLine("插入数据失败了！" + message);
}
}
/// <summary>
/// 修改数据
/// </summary>
/// <param name="mySqlCommand"></param>
public static void getUpdate(MySqlCommand mySqlCommand)
{
try
{
mySqlCommand.ExecuteNonQuery();
}
catch (Exception ex)
{
String message = ex.Message;
Console.WriteLine("修改数据失败了！" + message);
}
}
/// <summary>
/// 删除数据
/// </summary>
/// <param name="mySqlCommand"></param>
public static void getDel(MySqlCommand mySqlCommand)
{
try
{
mySqlCommand.ExecuteNonQuery();
}
catch (Exception ex)
{
String message = ex.Message;
Console.WriteLine("删除数据失败了！" + message);
}
}
}