asp.net中通过ALinq让Mysql操作变得如此简单

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MySql.Data.MySqlClient;
namespace CimDataImport
{
public class TestCharacter
{
public const string mysqlConnection = "User Id=root;Host=localhost;Database=cim;password=root";
/// <summary>
/// 添加数据
/// </summary>
/// <returns></returns>
public int Add(UserBase entity)
{
string sql = "INSERT INTO cimuser (userid,userNickName) VALUE (@userid,@userNickName)";
using (MySqlConnection mycn = new MySqlConnection(mysqlConnection))
{
mycn.Open();
MySqlCommand command = new MySqlCommand(sql, mycn);
command.Parameters.AddWithValue("@userid", entity.UserId);
command.Parameters.AddWithValue("@userNickName",entity.UserNickName);
return command.ExecuteNonQuery();
}
}
/// <summary>
/// 修改数据
/// </summary>
/// <param name="entity"></param>
/// <returns></returns>
public int Update(UserBase entity)
{
string sql = "UPDATE cimuser SET userNickName=@userNickName WHERE userid=@userid";
using (MySqlConnection mycn = new MySqlConnection(mysqlConnection))
{
mycn.Open();
MySqlCommand command = new MySqlCommand(sql, mycn);
command.Parameters.AddWithValue("@userid", entity.UserId);
command.Parameters.AddWithValue("@userNickName", entity.UserNickName);
return command.ExecuteNonQuery();
}
}
/// <summary>
/// 删除数据
/// </summary>
/// <param name="primaryKey"></param>
/// <returns></returns>
public int Delete(int primaryKey)
{
string sql = "DELETE FROM cimuser WHERE userid=@userid";
using (MySqlConnection mycn = new MySqlConnection(mysqlConnection))
{
mycn.Open();
MySqlCommand command = new MySqlCommand(sql, mycn);
command.Parameters.AddWithValue("@userid", primaryKey);
return command.ExecuteNonQuery();
}
}
/// <summary>
/// 根据主键查询
/// </summary>
/// <param name="primaryKey"></param>
/// <returns></returns>
public UserBase Get(int primaryKey)
{
string sql = "SELECT userid,userNickName FROM cimuser where userid=@userid";
using (MySqlConnection mycn = new MySqlConnection(mysqlConnection))
{
mycn.Open();
MySqlCommand command = new MySqlCommand(sql, mycn);
command.Parameters.AddWithValue("@userid", primaryKey);
MySqlDataReader reader = command.ExecuteReader();
UserBase userBase = null;
if (reader.Read())
{
userBase = new UserBase();
userBase.UserId = Convert.ToInt32(reader["userid"]);
userBase.UserNickName = reader["userNickName"] == DBNull.Value ? null : reader["userNickName"].ToString();
}
return userBase;
}
}
/// <summary>
/// 查询集合
/// </summary>
/// <returns></returns>
public IList<UserBase> GetList()
{
string sql = "SELECT userid,userNickName FROM cimuser limit 1,10";
using (MySqlConnection mycn = new MySqlConnection(mysqlConnection))
{
mycn.Open();
MySqlCommand command = new MySqlCommand(sql, mycn);
MySqlDataReader reader = command.ExecuteReader();
IList<UserBase> list = new List<UserBase>();
UserBase userBase = null;
while (reader.Read())
{
userBase = new UserBase();
userBase.UserId = Convert.ToInt32(reader["userid"]);
userBase.UserNickName = reader["userNickName"] == DBNull.Value ? null : reader["userNickName"].ToString();
list.Add(userBase);
}
return list;
}
}
}
}