c#中幾個常用代碼

文件操作

string path = @"e:\MyTest.txt";
 DateTime dt = DateTime.Now;
                if (!File.Exists(path)) 
                {
                    // Create a file to write to.
                    using (StreamWriter sw = File.CreateText(path)) 
                    {
                        sw.WriteLine("time"+dt.ToString());
                        sw.WriteLine(hashtable.Count.ToString());
                    }    
                }
                else
                {
                    using (StreamWriter sw = File.AppendText(path)) 
                    {
                        sw.WriteLine("time"+dt.ToString());
                        sw.WriteLine(hashtable.Count.ToString());
                    }
                }

web應用中的Cache操作

Cache cache = System.Web.HttpContext.Current.Cache;
string obj=null;
cache.Insert("cache1",obj,null,DateTime.Now.AddHours(1),TimeSpan.Zero,CacheItemPriority.AboveNormal,null);

當然對於簡單的字符串,使用以下方式即可

Application["Title"] = "Test Sample";

cache操作可以放在任何地方,當然放在Global.asax的Application_Start(Object sender, EventArgs e)中最好.