protected void cmdUpload_Click(object sender, EventArgs e) { // Check if a file was submitted. if (Uploader.PostedFile.ContentLength != 0) { try { if (Uploader.PostedFile.ContentLength > 1048576... Read More
为了防止规范化错误之类的安全风险，也可以使用Path类例如，它从一个固定的文档目录返回文件数据，FileInfo file=new FileInfo(Server.MapPath(@"Document\"+TextBox1.Text));这里用的是客户端的路径，存在一个漏洞， 举个例子，当客户端输入..\fileName这个路径的时候，这样这个路径就变化了，其实他已经忽略了Document\这个路... Read More
这里的myFile是FileInfo的一个实例如果设置一个文件为只读，我们需要位运算符来操作if ((myFile.Attributes & FileAttributes.ReadOnly) != 0) { ... }可以设置文件的特性-增加文件的只读类型myFile.Attributes=myFile.Attributes|FileAttributes.ReadOnly;移除文件的只读类... Read More
#region 文件流写入 private void WriteFileInfo() { FileInfo myFile = new FileInfo(@"c:\tem\aa.txt"); FileStream stream=null; //if (!myFile.Exists()) //{ // stream = myFile.Create(); //} stream = myFile.Open... Read More
#region 用DirectoryInfo这个类实现查看目录下的每个文件 public void LookDirectoryInfo() { string directoryName = @"c:\tem"; DirectoryInfo directoryInfo = new DirectoryInfo(directoryName); FileInfo[] fileList = null; if... Read More
protected void Page_Load(object sender, EventArgs e){ string series, category; if (!IsPostBack) {string series1 = Series(out series); string category1 = Category(out category); string cseries = series... Read More
public delegate void Feedback(object value,Int32 item,Int32 numItems);当编译器遇到这段代码时，它会产生如下面所示的一个完整的类定义public class Feedback : MulticastDelegate { public Feedback(object target, Int32 methodPro); public ... Read More
class MailManager { //传递给事件接受者的类型定义信息 public class MailMsgEventAgs : EventArgs { public readonly String from, to, subject, body; public MailMsgEventAgs(String from, String to, String subject, String b... Read More
class ClassWithDelegate { public delegate int DelegateThatReturnsInt(); public DelegateThatReturnsInt theDelegate; public void Run() { for (; ; ) { Thread.Sleep(500); if (theDelegate != null) {//第一... Read More
这是一个委托排序的例子public enum Comparsion { theFirstComesFirst=1, theSecondComesFirst=2 } //来决定排序的顺序class Pair<T> //在下面我创建的两个类Student，Dog，都把他们保存在Pair里面{ private T[] thePair = new T[2]; public delegate... Read More