Learn VbScript -String Functions
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The document provides an overview of VBScript, a lightweight scripting language developed by Microsoft, primarily used in Quick Test Professional (QTP). It details variable types, scope, and several string manipulation functions such as len, lcase, ucase, left, right, and replace, along with examples of their usage. The document also discusses the execution environment for VBScript through WScript and CScript and highlights the importance of variable declarations in script-level and procedure-level contexts.
Learn VbScript -String Functions
- 1. VBScript in QTP Microsoft VBScript (Visual Basic Script) is a general-purpose, lightweight , scripting language developed by Microsoft which is modeled on Visual Basic. VBScript is the main scripting language for Quick Test Professional (QTP). As Vb Script is Lightweight language, there is no need to compile the program, during execution they got interpreted and run. No .exe file got generated. Script engines like Wscript.exe & Cscript.exe interpret VBScript file in Windows GUI environment using Windows script Host. WSH is the system module that transforms a VBScript file into a Windows executable file. Wscript.exe is used to display output and receive input in Windows GUI format such as dialog and input boxes. Cscript.exe is used in a command-line environment. VBScript Variable In VBScript all variables are of the type variant that can store any type of value. It supports int, long, double, String, Boolean ,date datatypes. A variant behaves as a number when it is used in a numeric context and as a string when used in a string context. Variables can be declared using the following statements that determines the scope of the variable. The scope of the variable plays a crucial role when used within a procedure or classes. ñDim --Variables declared with Dim at the script level are available to all procedures within the script. At the procedure level, variables are available only within the procedure. ñPublic Variables declared using "Public" Keyword are available to all the procedures across all the associated scripts. ñPrivate --Variables that are declared as "Private" have scope only within that script in which they are declared. VB Script String Functions: Len Function : Returns the number of characters in a string Example: Str="Welcome to the QTP Learning Blog" Msgbox Len(Str) ' Output --> 32 Msgbox Len("Mindfire Solutions") ' Output--> 18
- 2. LCase Function : Returns a string that has been converted to lowercase. Example: Str="Welcome to the QTP Learning Blog" Msgbox LCase(Str) ' Output --> welcome to the qtp learning blog Msgbox LCase("Mindfire Solutions") ' Output--> mindfire solutions UCase Function : Returns a string that has been converted to uppercase. Str="Welcome to the QTP Learning Blog" Msgbox UCase(Str) ' Output --> WELCOME TO QTP LEARNING BLOG Msgbox UCase("Mindfire Solutions") ' Output--> MINDFIRE SOLUTIONS Left Function :Returns a specified number of characters from the left side of a string. Str="Welcome to the QTP Learning Blog" Msgbox LEFT(Str,7) ' Output --> Welcome Msgbox LEFT("Mindfire Solutions",2) ' Output--> Mi second parameter is Numeric expression indicating how many characters to return. If 0, a zero-length string("") is returned. If greater than or equal to the number of characters in string, the entire string is returned. Msgbox LEFT(Str,40) ' Output --> WELCOME TO QTP LEARNING BLOG
- 3. Msgbox LEFT("Mindfire Solutions",0) O/P—blank msgbox Right Function : Returns a specified number of characters from the right side of a string. Str="Welcome to the QTP Learning Blog" Msgbox Right(Str,7) ' Output --> ng Blog Msgbox Right("Mindfire Solutions",2) ' Output--> ns second parameter is Numeric expression indicating how many characters to return. If 0, a zero-length string("") is returned. If greater than or equal to the number of characters in string, the entire string is returned. Msgbox Right(Str,40) ' Output --> WELCOME TO QTP LEARNING BLOG Msgbox Right("Mindfire Solutions",0) O/P—blank msgbox Mid Function : Returns a specified number of characters from a string. Str="Welcome to the QTP Learning Blog" Msgbox Mid(Str,3,4) ' Output --> lcom Msgbox Mid("Mindfire Solutions",2,5) ' Output--> indfi Msgbox Mid("Mindfire Solutions",2) ' Output--> indfire Solutions Second parameter, in string at which the part to be taken begins. If start is greater than the number of characters in string, Mid returns a zero-length string ("") which is blank. Third parameter, Number of characters to return. If omitted , all characters from the start position to the end of the string are returned. Replace Function : It Returns a string in which a specified substring has been replaced with another
- 4. substring a specified number of times. Str="Welcome to the QTP Learning Blog" print Replace(Str, "to","into") 'Output --> Welcome into the QTP Learning Blog Print Replace("Mindfire Solutions","Solutions","Org") 'Output --> Mindfire Org Print Replace("Quick Test ProfeSsional","s","x",5,3,0) 'Output --> k Text ProfeSxional Print Replace("Quick Test ProfeSsional","s","x",5,3,1) 'Output --> k Text Profexxional Second parameter, in string is which specified substring has been replaced Third parameter, is the Replacement substring. Fourth, Fifth and Sixth parameters are optional. Fourth and fifth stands for start position and count. Both are used in together. Sixth is compare mode, default is 0 (binary comparison) which means case sensitive. If 1, then case in sensitive. Space Function : It Returns a string consisting of the specified number of spaces. Str1="Welcome" Str2="to the QTP" Str3="Learning Blog" Str4="By Nilanjan" MsgBox Str1 & Space(10) & Str2 & Space(2) &Str3 &Str4 'Output--> Welcome to the QTP Learning BlogBy Nilanjan Split Function : it Returns an one-dimensional array containing a specified number of substrings. 'Comma As Delimitter Str="Welcome,to,the,QTP, Learning,Blog" 'Split
- 5. SArray=Split(Str,",",-1) For i= 0 to UBound(SArray) Msgbox SArray(i) Next SArray here holds the returned array StrComp Function : It Returns a value indicating the result of a string comparison. Str="Welcome into the QTP Learning Blog" Str1 = "QTP" Str2 = "qtp" Msgbox StrComp(Str1, Str2, 1) 'Output--> Returns 0 , which means Str1 is equal to Str2 for textual comparison Msgbox StrComp(Str1, Str2, 0) 'Output--> Returns -1 , which means Str2 is greater than Str1 for Binary comparison Msgbox StrComp("Nilanjana", "Nilanjan", 0) 'Output--> Returns 1 StrReverse Function : It Returns a string in which the character order of a specified string is reversed. Str="Welcome to the QTP Learning Blog” msgbox StrReverse(Str) 'Output-->gplB gninraeL PTQ eht ot emocleW Msgbox StrReverse("Mindfire Solutions") 'Output-->snoituloS erifdniM Trim Functions : t Returns a copy of a string without leading and trailing spaces LTrim : It Returns a copy of a string without leading spaces Rtrim: It Returns a copy of a string without trailing spaces Example:
- 6. 'LTrim Msgbox Ltrim(" Welcome to the QTP Learning Blog ") 'Output-->"Welcome to the QTP Learning Blog “ Example: 'RTrim Msgbox Rtrim(" Welcome to the QTP Learning Blog ") 'Output--> " Welcome to the QTP Learning Blog " Example: 'Trim Msgbox Trim(" Welcome to the QTP Learning Blog ") 'Output-->"Welcome to the QTP Learning Blog " InStr Function : It Returns the position of the first occurrence of one string within another string. Str="Welcome to the QTP Learning Blog.qtp is a testing tool" msgbox Instr(1, Str, "QTP", 1) 'Output--> 16 , which means it found the string in 16th position for textual comparison msgbox Instr(6, Str, "qtp", 0) 'Output--> 34 , which means it found the string in 34th position for binary comparison. Search started from 6th character. msgbox Instr(6, Str, "Ftp", 0) 'Output--> 0 , which means it did not found the string after the 6th position for binary comparison