ASP String Function Example _ Application Tips

Example of an ASP string function
Use String functions to truncate the string to the end, case substitution, and so on.

Function	Grammar	Function
Len	Len (String|varname)	Returns the number of characters within a string, or the number of bytes required to store a variable.
Trim	Trim (String)	Remove the space before and after the string
Ltrim	Ltrim (String)	Remove the space before the string
Rtrim	Rtrim (String)	Remove the space after the string
Mid	Mid (String,start,length)	Gets a length string from the start character of the string string, if the third argument is omitted to represent a string starting from the start character to the end of the string
Left	Left (String,length)	To get a length string from the left side of a string string
Right	Right (String,length)	To get a length string from the right of a string string
LCase	LCase (String)	Converts all uppercase letters in string strings to lowercase letters
UCase	UCase (String)	Converts all uppercase letters in a string string to uppercase letters
StrComp	StrComp (String1,string2[,compare])	Returns a comparison between the string1 string and the string2 string, if two strings are the same, returns 0 if less than 1, or 1 if greater than
InStr	INSTR (String1,string2 [, compare] )	Returns the position of the first occurrence of the string1 string in the string2 string
Split	Split (String1,delimiter [, count[, start] ])	Splits a string into a one-dimensional array based on delimiter, where delimiter is used to identify the substring bounds. If omitted, use a space ("") as the separator. The number of substrings returned by count,-1 indicates that all substrings are returned. Start is 1 to perform a text comparison, if 0 or omit to perform a binary comparison.
Replace	Replace(expression, find, replacewith[, compare[, count[, start]]])	Returns a string in which a specified number of substrings (find) is replaced with another substring (replacewith).

1. Len Function Example:

The following example uses the Len function to return the number of characters in a string:

Len("VBSCRIPT") 'MyString Contains  8 . 2, Trim, Ltrim, RTrim function Example:

The following example uses the LTrim, RTrim, and Trim functions to remove spaces, trailing spaces, start, and trailing spaces at the beginning of a string, respectively:

LTrim(" vbscript ") 'MyVar Contains  "vbscript " . RTrim(" vbscript ") 'MyVar contains  "  vbscript" . Trim(" vbscript ") 'MyVar contains "vbscript" .

3, Mid Function Example:

The following example uses the Mid function to return six characters starting from the fourth character in a string:

Mid("VBScript is fun!", 4, 6) 'MyVar  contains  "Script" .

4, Left Function example:

The following example uses the left function to return the three-letter mystring:

Left(MyString, 3) 'LeftString Contains "VBS

5, Right Function example:

The following example uses the right function to return a specified number of characters from the right-hand side of a string:

Dim AnyString, MyStrAnyString = "Hello World"      'Defines a string. Right(AnyString, 1) 'return  "d" . Right(AnyString, 6) ' return  " World" . Right(AnyString, 20) ' return  "Hello World" . 6, LCase Function Example:

The following example uses the LCase function to convert the uppercase letter to lowercase letters:

LCase(MyString) ' LCaseString Contains  "vbscript" . 7, UCase Function Example:

The following example uses the UCase function to return the uppercase form of a string:

UCase("Hello World") ' Return "HELLO WORLD" .

8, StrComp Function Example:

The following example uses the StrComp function to return the result of a string comparison. If the third argument is 1 to perform a text comparison, if the third argument is 0 or omit to perform a binary comparison.

Dim MyStr1, MyStr2, MyCompMyStr1 = "ABCD": MyStr2 = "abcd"       'Define variables. StrComp(MyStr1, MyStr2, 1) ' return  0 . StrComp(MyStr1, MyStr2, 0) ' return  -1 . StrComp(MyStr2, MyStr1) ' return  1 .

9, instr Example:

The following example uses InStr to search for strings:

Dim SearchString, SearchChar, MyPosSearchString ="XXpXXpXXPXXP"???SearchChar = "P"??Instr(SearchString, SearchChar)???'返回 9. Note: Instead of returning the character position where the string first appears in another string, the byte position is not returned.

10, the Split function example:

Dim MyString, MyArray, MSG
MyString = "vbscriptxisxfun!"
MyArray = Split (MyString, "X", -1,1)
' MyArray (0) contains "VBScript".
' MyArray (1) contains ' is '.
' MyArray (2) contains "fun!".
Response.Write (myarray (0))

11, replace function Example:

Replace ("ABCD", "BC", "12") ' Get a12d