文件名称：水加热计算
文件大小：10KB
文件格式：TXT
更新时间：2016-09-30 10:15:53
水加热
ASP函数 IsNull() FUNCTION: 判断一对象是否为空，返回布尔值. SYNTAX: IsNull(expression) ARGUMENTS: EXAMPLE: $#@60;% Dim i response.write IsNull(i) %> RESULT: False IsNumeric() FUNCTION: 判断一对象是否为数字，返回布尔值. SYNTAX: IsNumeric(expression) ARGUMENTS: EXAMPLE: $#@60;% i = "345" response.write IsNumeric(i) %> RESULT: True 就算数字加了引号，ASP还是认为它是数字。 IsObject() FUNCTION: 判断一对象是否为对象，返回布尔值. SYNTAX: IsObject(expression) ARGUMENTS: EXAMPLE: $#@60;% Set con = Server.CreateObject("ADODB.Connection") response.write IsObject(con) %> RESULT: True LBound() FUNCTION: 返回指定数组维的最小可用下标. SYNTAX: Lbound(arrayname [, dimension]) ARGUMENTS: ; dimension 指明要返回哪一维下界的整数。使用 1 表示第一维，2 表示第二维，以此类推。如果省略 dimension 参数，默认值为 1. EXAMPLE: $#@60;% i = Array("Monday","Tuesday","Wednesday") response.write LBound(i) %> RESULT: 0 LCase() FUNCTION: 返回字符串的小写形式 SYNTAX: Lcase(string) ARGUMENTS: string is any valid string expression. EXAMPLE: $#@60;% strTest = "This is a test!" response.write LCase(strTest) %> RESULT: this is a test! Left() < FUNCTION: 返回字符串左边第length个字符以前的字符（含第length个字符). SYNTAX: Left(string, length) ARGUMENTS: EXAMPLE: $#@60;% strTest = "This is a test!" response.write Left(strTest, 3) %> RESULT: Thi Len() FUNCTION: 返回字符串的长度. SYNTAX: Len(string | varName) ARGUMENTS: EXAMPLE: $#@60;% strTest = "This is a test!" response.write Len(strTest) %> RESULT: 15 LTrim() FUNCTION: 去掉字符串左边的空格. SYNTAX: LTrim(string) ARGUMENTS: EXAMPLE: $#@60;% strTest = " This is a test!" response.write LTrim(strTest) %> RESULT: This is a test! Mid() FUNCTION: 返回特定长度的字符串(从start开始,长度为length). SYNTAX: Mid(string, start [, length]) ARGUMENTS: EXAMPLE: $#@60;% strTest = "This is a test! Today is Monday." response.write Mid(strTest, 17, 5) %> RESULT: Today