C#读取写入文件的3种方式【案例+源码】
2023-09-14 09:16:23 时间
C#读取写入文件的3种方式
最新对文件的操作比较频繁。这里记录一下常用的几种文件读写的方式。
我这里使用窗体来做测试。
1:二进制读写
/// <summary>
/// 二进制写入文件
/// </summary>
private void button1_Click(object sender, EventArgs e)
{
SaveFileDialog saveDlg = new SaveFileDialog();
saveDlg.FileName = "File";
saveDlg.Title = "保存数据";
saveDlg.Filter = "File(*.txt)|*.txt";
saveDlg.DefaultExt = "txt";
saveDlg.AddExtension = true;
//saveDlg.InitialDirectory = "D:AMC Results";
if (saveDlg.ShowDialog() == DialogResult.OK)
{
Cursor = Cursors.WaitCursor;
SaveDatafileWithNewVersion(saveDlg.FileName);
Cursor = Cursors.Default;
}
}
/// <summary>
/// 二进制保存文件
/// </summary>
public static void SaveDatafileWithNewVersion(String sFile)
{
//文件格式依次为:内部版本号,...
Stream stream = File.Open(sFile, FileMode.Create);
BinaryWriter bw = new BinaryWriter(stream);
bw.Write((Int16)1);//内部版本号,暂时用1,表示版本1,整型
///写入Config对象
bw.Write("泽国江山入战图\n");
bw.Write("生民何计乐樵苏\n");
bw.Write("凭君莫话封侯事\n");
bw.Write("一将功成万骨枯\n");
bw.Close();
stream.Close();
}
/// <summary>
/// 打开文件
/// </summary>
private void button2_Click(object sender, EventArgs e)
{
OpenFileDialog openDlg = new OpenFileDialog();
openDlg.Title = "File";
openDlg.Filter = "File (*.txt)|*.txt";
if (openDlg.ShowDialog() == DialogResult.OK)
{
BinaryReader br = new BinaryReader(new FileStream(openDlg.FileName,
FileMode.Open));
string str = "";
int number = br.ReadInt16();
str += br.ReadString();
str += br.ReadString();
str += br.ReadString();
str += br.ReadString();
richTextBox1.Text = str;
br.Close();
}
}
2:泛型读写:
/// <summary>
/// 泛型写入
/// </summary>
private void button3_Click(object sender, EventArgs e)
{
SaveFileDialog saveDlg = new SaveFileDialog();
saveDlg.FileName = "File";
saveDlg.Title = "保存数据";
saveDlg.Filter = "File(*.txt)|*.txt";
saveDlg.DefaultExt = "txt";
saveDlg.AddExtension = true;
//saveDlg.InitialDirectory = "D:AMC Results";
if (saveDlg.ShowDialog() == DialogResult.OK)
{
string str = "泽国江山入战图\n生民何计乐樵苏\n凭君莫话封侯事\n一将功成万骨枯";
BinarySerialize<string>(str, saveDlg.FileName);
}
}
/// <summary>
/// 写入文件
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="obj">写入类型</param>
/// <param name="path">路径</param>
public static void BinarySerialize<T>(T obj, string path)
{
FileStream fileStream = new FileStream(path, FileMode.Create);
BinaryFormatter b = new BinaryFormatter();
try
{
b.Serialize(fileStream, obj);
fileStream.Close();
}
catch (System.Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
if (fileStream != null)
{
fileStream.Close();
fileStream.Dispose();
}
}
}
/// <summary>
/// 泛型读取
/// </summary>
private void button4_Click(object sender, EventArgs e)
{
OpenFileDialog openDlg = new OpenFileDialog();
openDlg.Title = "File";
openDlg.Filter = "File (*.txt)|*.txt";
if (openDlg.ShowDialog() == DialogResult.OK)
{
string str = BinaryDeserialize<string>(openDlg.FileName);
richTextBox2.Text = str;
}
}
/// <summary>
/// 读取文件
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="path">路径</param>
/// <returns></returns>
public static T BinaryDeserialize<T>(string path)
{
FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
BinaryFormatter b = new BinaryFormatter(); //SoapFormatter
T rs;
try
{
rs = (T)b.Deserialize(fileStream);
return rs;
}
catch (System.Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
if (fileStream != null)
{
fileStream.Close();
fileStream.Dispose();
}
}
return default(T);
}
3:XML读写:不是很稳定
/// <summary>
/// XML写入
/// </summary>
private void button5_Click(object sender, EventArgs e)
{
SaveFileDialog saveDlg = new SaveFileDialog();
saveDlg.FileName = "File";
saveDlg.Title = "保存数据";
saveDlg.Filter = "File(*.txt)|*.txt";
saveDlg.DefaultExt = "txt";
saveDlg.AddExtension = true;
//saveDlg.InitialDirectory = "D:AMC Results";
if (saveDlg.ShowDialog() == DialogResult.OK)
{
string str = "泽国江山入战图\n生民何计乐樵苏\n凭君莫话封侯事\n一将功成万骨枯";
SerializeToXml<string>(saveDlg.FileName, str);
}
}
/// <summary>
/// XML序列化某一类型到指定的文件
/// /// </summary>
/// /// <param name="filePath">文件路径</param>
/// /// <param name="obj">写入对象</param>
/// /// <param name="type"></param>
public static void SerializeToXml<T>(string filePath, T obj)
{
try
{
using (System.IO.StreamWriter writer = new System.IO.StreamWriter(filePath))
{
System.Xml.Serialization.XmlSerializer xs = new System.Xml.Serialization.XmlSerializer(typeof(T));
xs.Serialize(writer, obj);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
/// <summary>
/// XML读取
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button6_Click(object sender, EventArgs e)
{
OpenFileDialog openDlg = new OpenFileDialog();
openDlg.Title = "File";
openDlg.Filter = "File (*.txt)|*.txt";
if (openDlg.ShowDialog() == DialogResult.OK)
{
string str = DeserializeFromXml<string>(openDlg.FileName);
richTextBox3.Text = str;
}
}
/// <summary>
/// 从某一XML文件反序列化到某一类型
/// </summary>
/// <param name="filePath">待反序列化的XML文件名称</param>
/// <param name="type">反序列化出的</param>
/// <returns></returns>
public static T DeserializeFromXml<T>(string filePath)
{
try
{
if (!System.IO.File.Exists(filePath))
throw new ArgumentNullException(filePath + " not Exists");
using (System.IO.StreamReader reader = new System.IO.StreamReader(filePath))
{
System.Xml.Serialization.XmlSerializer xs = new System.Xml.Serialization.XmlSerializer(typeof(T));
T ret = (T)xs.Deserialize(reader);
return ret;
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return default(T);
}
}
运行结果:
相关文章
- c#数组赋初值_C#数组初始化
- C# 多线程 Parallel.ForEach 和 ForEach 效率问题研究及理解
- c# mysql executenonquery_C#与数据库访问技术总结(八)之ExecuteNonQuery方法
- c#常用表格控件dataGridView的分页显示的案例分享
- C#通过抽象工厂模式造车的案例分享
- C#时间戳基本使用案例分享
- 详解C# WinForm如何实现自动更新程序的案例分享
- c# 多线程并发-金三银四面试:C#.NET面试题高级篇2-多线程
- c#面试题抽象类和接口的区别-Java软件工程师的面试题及答案
- c#面试题抽象类和接口的区别-金三银四面试:C#程序员经常遇到的30道基础面试题,想你所想
- 【愚公系列】2023年01月 .NET CORE工具案例-使用pythonnet实现C#和Python的融合调用
- 分享一个c#写的开源分布式消息队列equeue
- URL中去除指定参数实现C#代码
- 浅谈Java与C#的一些细微差别
- c#在windows服务中使用定时器实例代码
- C#实现去除Strings中空格的方法
- C#实现动态加载dll的方法
- C#中把字符串String转换为整型Int的小例子