WebForm开发常用代码

1.获取服务器绝对路径：

public static string GetMapPath(string strPath)
        {           
            if (HttpContext.Current != null)
            {
                return HttpContext.Current.Server.MapPath(strPath);
            }
            else 
            {
                strPath = strPath.Replace("/", "\");
                if (strPath.StartsWith("\"))
                {
                    strPath = strPath.Substring(strPath.IndexOf('\', 1)).TrimStart('\');
                }
                return System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, strPath);
            }
        }

 2.简单实例序列化：实体类增加特性：[Serializable],实用：
  序列化：

 public static void Save(object obj, string filename)
        {
            FileStream fs = null; 
            try
            {
                fs = new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.ReadWrite);
                XmlSerializer serializer = new XmlSerializer(obj.GetType());
                serializer.Serialize(fs, obj);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (fs != null)
                    fs.Close();
            }
        }

  反序列化：

 public static object Load(Type type, string filename)
        {
            FileStream fs = null;
            try
            {                
                fs = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                XmlSerializer serializer = new XmlSerializer(type);
                return serializer.Deserialize(fs);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (fs != null)
                    fs.Close();
            }
        }

3、URL字符编码：HttpContext.Current.Server.UrlEncode（str)、HttpContext.Current.Server.UrlDecode(str)
     获取web.config中appSettings字节值：ConfigurationManager.AppSettings[xmlName].ToString()

4、int.TryParse与 int.Parse 又较为类似，但它不会产生异常，转换成功返回 true，转换失败返回 false。  

最后一个参数为输出值，如果转换失败，输出值为 0，如果转换成功，输出值为转换后的int值

public  GetInt(string str, int defaultValue)
        {
             int result = 0;
            int.TryParse(str, out result);
            return result == 0 ? defaultValue : result;
        }

 5.对得到的值要有是否为空的判断

6、禁止回车表单自动提交:onkeydown="if(event.keyCode==13){return false;}"

7、IO相关：
  1)获取文件夹下文件： string[] files = Directory.GetFiles(path, "*.txt", SearchOption.AllDirectories);
  2)获取文件名：Path.GetFileNameWithoutExtension(file);
  3)读取：string[] sqlItems = File.ReadAllLines(path); string text=FileExtend.ReadAllText(text);
   Byte[] buff = File.ReadAllBytes(path); Encoding.Default.GetString(buff);

8、Request对象： [URL]:LocalPath：映射路径，[UrlReferrer]:PathAndQuery

     Response：

9、Reflection：

 Assembly ass =  Assembly.Load(DllName);//完整DLL
 Type[] typeList = ass.GetExportedTypes();
Type:Name,FullName,BaseType
MethodInfo:Name,GetCustomAttributes
GetProperty().GetValue

 实例化：object o = Activator.CreateInstance(t); t.GetMethod("ProcessRequest").Invoke(o, new object[] {  });  

10、WriteCookie

HttpCookie tokenCookie = new HttpCookie("name", value);
            tokenCookie.Domain = ;            
            tokenCookie.Expires = DateTime.Now.AddHours(1);
            HttpContext.Current.Response.Cookies.Add(tokenCookie);

11、int补齐字符串：string.padledt(len,'0'); int.tostring("d8")