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Microsoft AJAX Library Cheat Sheet(5): Number和Error类型的扩展

本文为翻译,英文原版的Cheat Sheet(PDF版本)在此下载:http://aspnetresources.com/downloads/ms_ajax_library_cheat_sheets1.zip

原作版权声明:

Copyright (c) 2004-2006, Milan Negovan 
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注:标注有[S]的为静态方法,无须实例化对象即可使用。

 

Number.format (format)

用指定的format格式化数字(区域设定无关)。

 

Number.localeFormat (format)

用指定的format格式化数字(区域设定相关)。

 

支持的格式

  1. p:将数字转为百分比字符串(e.g.: -1,234.56 %)
  2. d:将数字装化为十进制字符串,没有逗号分隔符(e.g.: -1234.56)
  3. c:将数字转化为货币金额形式(e.g.: (¤1,234.56))
  4. n:将数字串化为逗号三位分隔(-d,ddd,ddd.ddd…")形式(e.g.: -1,234.56)

 

[S] Number.parseLocale (value)

从字符串表示的本地数字解析成相应的Number类型。使用Sys.CultureInfo.CurrentCulture得到当前的区域属性。

 

[S] Number.parseInvariant (value)

从字符串表示的本地数字解析成相应的浮点数Number类型。value中可以包含逗号分隔符(,)或是正负(+-)号。

var a = new Number();
a = Number.parseInvariant("4");
var b = new Number(2);
var c = Number.parseInvariant("1.53") + a + b;
// c = 7.53

 

Error相关的方法

  1. [S] Error.argument:根据指定的异常信息和非法的参数创建一个Sys.ArgumentException类型的异常。
  2. [S] Error.argumentNull:根据指定的异常信息和为Null的参数创建一个Sys.ArgumentNullException 类型的异常。
  3. [S] Error.argumentType:根据指定的异常信息、期待参数类型和实际参数类型创建一个Sys.ArgumentTypeException 类型的异常。
  4. [S] Error.argumentUndefined:根据指定的异常信息和为定义的参数创建一个Sys.ArgumentUndefinedException类型的异常。
  5. [S] Error.create:根据指定的异常信息创建一个Error对象。
  6. [S] Error.invalidOperation:根据指定的异常信息和引发该异常的参数创建一个Sys.InvalidOperationException 类型的异常。
  7. [S] Error.notImplemented:根据指定的异常信息创建一个Sys.NotImplementedException类型的异常。
  8. [S] Error.argumentOutOfRange:根据指定的异常信息和引发该异常的参数创建一个Sys.ArgumentOutOfRangeException类型的异常。
  9. [S] Error.parameterCount:根据指定的异常信息创建一个Sys.ParameterCountException 类型的异常。
  10. Error.popstackFrame:将该Error实例的fileName和lineNumber字段更新为该Error被掷出时的位置,而不是该Error被创建时的位置。
// Throw a standard exception type
var err = Error.argumentNull("input", "A parameter was undefined.");
throw err;
// Throw a generic error with a message and associated errorInfo object.
var errorInfoObj = { name: "SomeNamespace.SomeExceptionName",
someErrorID: "436" };
var err = Error.create("A test message", errorInfoObj);
throw err;
posted on 2007-02-09 21:00  Dflying Chen  阅读(...)  评论(...编辑  收藏