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846天前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 ); |
} |
} |
} |
