VBScript Reference Manual for InduSoft Web Studio

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VBScript Reference Manual InduSoft Web Studio InStrB Description Returns an integer indicating the byte position of the first occurrence of one string within a string containing byte data. Usage intVal = InStrB([start, ]string1, string2[, compare]) Arguments start Optional. Is any valid non-negative numeric expression that indicates the starting position for each search. Non-integer values are rounded. If omitted, search begins at the first character position. The start argument is required if compare is specified. string1 Required. String expression being searched. string2 Required. String expression searched for. compare Optional. Numeric value indicating the kind of comparison to use when evaluating substrings. See Settings section for values. If omitted, a binary comparison is performed. Settings The compare argument can have the following values: Constant Value Description vbBinaryCompare 0 Perform a binary comparison. (default) vbTextCompare 1 Perform a textual comparison Return An integer value indicating the byte position. The InStr function returns the following values: If InStr returns string1 is zero-length 0 string1 is Null Null string2 is zero-length start string2 is Null Null string2 is not found 0 string2 is found within string1 Position at which match is found start > Len(string2) 0 Remarks The InStrB function is used with byte data contained in a string. Instead of returning the character position of the first occurrence of one string within another, InStrB returns the byte position. If start contains Null, a runtime error occurs. If start is larger than the length of string2 (start>Len(string2)), 0 will be returned. See Also InStr, InStrRev 140 InduSoft, Ltd.
InduSoft Web Studio VBScript Reference Manual InStrRev Description Returns the position of an occurrence of one string within another, from the end of string Usage intVal = InStrRev(string1, string2[, start[, compare]]) Arguments string1 Required. String expression being searched. string2 Required. String expression searched for. start Optional. Numeric expression that sets the starting position for each search. If omitted, -1 is used, which means that the search begins at the last character position. If start contains Null, an error occurs. compare Optional. Numeric value indicating the kind of comparison to use when evaluating substrings. If omitted, a binary comparison is performed. See Settings section for values. Settings The compare argument can have the following values: Constant Value Description vbBinaryCompare 0 Perform a binary comparison. vbTextCompare 1 Perform a textual comparison Return An integer value indicating the position InStrRev returns the following values: If InStr returns string1 is zero-length 0 string1 is Null Null string2 is zero-length start string2 is Null Null string2 is not found 0 string2 is found within string1 Position at which match is found start > Len(string2) 0 Remarks Note: The syntax for the InStrRev function is not the same as the syntax for the InStr function. Note that with UniCode characters, the second byte is usually non-zero (e.g. Asian characters). If start is Null, a runtime error will occur. If start > Len(string2), 0 will be returned. See Also InStr, InStrB Example The following examples use the InStrRev function to search a string: Dim SearchString, SearchChar, MyPos SearchString ="XXpXXpXXPXXP" 'String to search in. SearchChar = "P" 'Search for "P". MyPos = InstrRev(SearchString, SearchChar, 10, 0) ‘Binary comparison. Returns 9. MyPos = InstrRev(SearchString, SearchChar, -1, 1) ‘Textual comparison. Returns 12 MyPos = InstrRev(SearchString, SearchChar, 8) 'Comparison is binary. Returns 0. InduSoft, Ltd. 141
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