C#使用文件IO进行记事本的增删改查

本文主要是介绍C#使用文件IO进行记事本的增删改查，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

//黑色：需要引入的命名空间

//绿色：数据访问层，操作文件IO的属性设置与基本操作方法

//紫色：业务逻辑层，实现获取列表并添加数据最后保存列表、实现获取列表并删除数据最后保存列表、实现获取列表并修改删除最后保存列表、实现获取列表、实现获取列表中的指定数据

//蓝色：程序使用案例

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

namespace GameServer
{
public class UserDo
{
public string Name { get; private set; }
public string Path { get; private set; }

public UserDo()
{
Name = "UserData";
Path = "C:///" + Name + ".txt";
}

public string Read()
{
FileStream fs = new FileStream (Path, FileMode.OpenOrCreate, FileAccess.ReadWrite);
fs.Close ();
FileInfo file = new FileInfo (Path);
var reader = file.OpenText ();
string listJson = reader.ReadToEnd ();
reader.Close ();
return listJson;
}

public void Save(string listJson)
{
FileStream fs = new FileStream (Path, FileMode.OpenOrCreate, FileAccess.ReadWrite);
fs.Close ();
FileInfo file = new FileInfo (Path);
var writer = file.CreateText ();
writer.WriteLine (listJson);
writer.Close ();
}

public void Insert(string [] names, string [] values)
{
string listJson = Read ();
if (listJson == "") {
listJson += "UserData";
Save (listJson);
/*
listJson += "Id=1,";
listJson += "IsDeleted=" + false + ",";
listJson += names [0] + "=" + values [0] + ",";
listJson += names [1] + "=" + values [1] + ",";
listJson += names [2] + "=" + values [2] + ",";
listJson += names [3] + "=" + values [3] + ",";
listJson += names [4] + "=" + values [4] + ",";
listJson += names [5] + "=" + values [5] + ",";
listJson += names [6] + "=" + values [6] + ",";
listJson += names [7] + "=" + values [7];
DataTool.Save (listJson);
*/
}
else
{
listJson += "&Id=" + (GetList ().Count + 1) + ",";
listJson += "IsDeleted=" + false + ",";
listJson += names [0] + "=" + values [0] + ",";
listJson += names [1] + "=" + values [1] + ",";
listJson += names [2] + "=" + values [2] + ",";
listJson += names [3] + "=" + values [3] + ",";
listJson += names [4] + "=" + values [4] + ",";
listJson += names [5] + "=" + values [5] + ",";
listJson += names [6] + "=" + values [6] + ",";
listJson += names [7] + "=" + values [7];
Save (listJson);
}
}

public void Delete(int id)
{
var list = GetList ();
if (list == null || list.Count <= 0) {
return;
}
var user = list.Where (u => u.Id == id).FirstOrDefault ();
if (user != null) {
list.Remove (user);
string listJson = ToListJson (list);
Save (listJson);
}
}

public void Update(int id, string name, string value)
{
var list = GetList ();
if (list == null || list.Count <= 0) {
return;
}
for (int i = 0; i < list.Count; i++) {
var item = list [i];
if (name == "IsDeleted") {
item.IsDeleted = Convert.ToBoolean (value);
}
else if (name == "Name") {
item.Name = value;
}
else if (name == "Pwd") {
item.Pwd = value;
}
else if (name == "QQEmail") {
item.QQEmail = value;
}
else if (name == "Type") {
item.Type = int.Parse(value);
}
else if (name == "Gold") {
item.Gold = int.Parse(value);
}
else if (name == "RegisterTime") {
item.RegisterTime = value;
}
else if (name == "EndLoginTime") {
item.EndLoginTime = value;
}
else if (name == "UpdateTime") {
item.UpdateTime = value;
}
}
string listJson = ToListJson (list);
Save (listJson);
}

public string ToListJson(List<UserData> list)
{
string listJson = "UserData";
if (list == null || list.Count <= 0) {
return listJson;
}
for (int i = 0; i < list.Count; i++) {
listJson += "&Id=" + list[i].Id + ",";
listJson += "IsDeleted=" + list[i].IsDeleted + ",";
listJson += "Name=" + list[i].Name + ",";
listJson += "Pwd=" + list[i].Pwd + ",";
listJson += "QQEmail=" + list[i].QQEmail + ",";
listJson += "Type=" + list[i].Type + ",";
listJson += "Gold=" + list[i].Gold + ",";
listJson += "RegisterTime=" + list[i].RegisterTime + ",";
listJson += "EndLoginTime=" + list[i].EndLoginTime + ",";
listJson += "UpdateTime=" + list[i].UpdateTime;
}
return listJson;
}

public List<UserData> GetList()
{
List<UserData> list = new List<UserData> ();
string listJson = Read ();
if (listJson == "") {
return list;
}
if (!listJson.Contains("&")) {
Console.WriteLine (listJson);
/*
var attrs = listJson.Split (',');
UserData user = new UserData ();
user.Id = int.Parse (attrs [0].Split ('=') [1]);
user.IsDeleted = Convert.ToBoolean (attrs [1].Split ('=') [1]);
user.Name = attrs [2].Split ('=') [1];
user.Pwd = attrs [3].Split ('=') [1];
user.QQEmail = attrs [4].Split ('=') [1];
user.Type = int.Parse (attrs [5].Split ('=') [1]);
user.Gold = int.Parse (attrs [6].Split ('=') [1]);
user.RegisterTime = attrs [7].Split ('=') [1];
user.EndLoginTime = attrs [8].Split ('=') [1];
user.UpdateTime = attrs [9].Split ('=') [1];
list.Add (user);
*/
}
else
{
var jsons = listJson.Split ('&');
for (int i = 1; i < jsons.Length; i++) {
var attrs = jsons [i].Split(',');
UserData user = new UserData ();
user.Id = int.Parse (attrs [0].Split ('=') [1]);
user.IsDeleted = Convert.ToBoolean (attrs [1].Split ('=') [1]);
user.Name = attrs [2].Split ('=') [1];
user.Pwd = attrs [3].Split ('=') [1];
user.QQEmail = attrs [4].Split ('=') [1];
user.Type = int.Parse (attrs [5].Split ('=') [1]);
user.Gold = int.Parse (attrs [6].Split ('=') [1]);
user.RegisterTime = attrs [7].Split ('=') [1];
user.EndLoginTime = attrs [8].Split ('=') [1];
user.UpdateTime = attrs [9].Split ('=') [1];
list.Add (user);
}
}
return list;
}

public int Login(string name)
{
var user = GetList ().Where (u => u.Name == name).FirstOrDefault ();
if (user != null) {
SetUserInfo (user.Id, "EndLoginTime", user.EndLoginTime);
return user.Id;
} else {
return 0;
}
}

public int Register(string name, string pwd)
{
var user = GetList ().Where (u => u.Name == name).FirstOrDefault ();
if (user == null) {
try {
Insert (
new string[]{ "Name", "Pwd", "QQEmail", "Type", "Gold", "RegisterTime", "EndLoginTime", "UpdateTime" },
new string[]{ name, pwd, "", "0", "0", DateTime.Now.ToString (), DateTime.Now.ToString (), DateTime.Now.ToString () });
return 1;
} catch (Exception) {
return -1;
}
}
return -2;
}

public string GetUserInfo(int id, string name)
{
string value = "";
var list = GetList ();
if (list == null || list.Count <= 0) {
return value;
}
for (int i = 0; i < list.Count; i++) {
var item = list [i];
if (item.Id == id) {
if (name == "IsDeleted") {
value = item.IsDeleted.ToString ();
}
else if (name == "Name") {
value = item.Name;
}
else if (name == "Pwd") {
value = item.Pwd;
}
else if (name == "QQEmail") {
value = item.QQEmail;
}
else if (name == "Type") {
value = item.Type.ToString ();
}
else if (name == "Gold") {
value = item.Gold.ToString ();
}
else if (name == "RegisterTime") {
value = item.RegisterTime;
}
else if (name == "EndLoginTime") {
value = item.EndLoginTime;
}
else if (name == "UpdateTime") {
value = item.UpdateTime;
}
}
}
return value;
}

public void SetUserInfo(int id, string name, string value)
{
Update (id, name, value);
}

public void SendQQEmail(string receiveQQEmail)
{
try {
//SmtpClient client = new SmtpClient ("smtp.qq.com",3306);
//client.Send ("757721728@qq.com", receiveQQEmail, "用户登录的请求结果", new Random ().Next (1000, 10000).ToString());
//client.Credentials = (ICredentialsByHost)new NetworkCredential ("757721728@qq.com", "");
} catch (Exception ex) {
Console.WriteLine (ex.Message);
}
}
}
}

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