2010年9月19日 · When using substring the second parameter is the first index not to include: var s = "string"; s.substring(1, 3); // would return 'tr' var s = "another example"; s.substring(3, 7); // would return 'ther' When using substr the second parameter is the number of characters to include in the substring:

2015年3月6日 · text1.substring(int1, int2); text2.substring(int1, int2); text3.substring(int1, int2); that would return abc(the first 3 characters) the problem is that the strings length is always changing, so i can't use text1.length no matter what.

2010年2月11日 · The only difference between slice and substring method is of arguments. Both take two arguments e.g. start/from and end/to.

2013年6月27日 · subString = word.Substring(0,Math.Min(5,word.Length)); The latter code is more human-readable and lightweight, though there is definitely a slight coolness factor to using Linq on a string to take the first five characters, without having to check the length of the string.

2013年9月4日 · The code below uses the VBA Instr function, which looks for a substring in a string. It returns 0 when the string is not found. Public Function CONTAINS(TextString As String, SubString As String) As Integer CONTAINS = InStr(1, TextString, SubString) End Function

2017年5月18日 · I'm trying to extract a code that varies in length that exists after the first two underscores and before the third underscore in a field in a table.

The best overloaded method match for 'string.Substring(int)' has some invalid arguments. Substring is used to get part of string using character position and/or length of the resultant string. for example srch.Substring(1, 3) returns the string "her" As other have mentioned you should use Contains which tells you if one string occurs within ...

2017年1月16日 · Generate substring. Returns a string object with its contents initialized to a substring of the current object. This substring is the character sequence that starts at character position pos and has a length of n characters. Your line b …

How does this compare performance wise to the obvious IndexOf and Substring combination? I assume it is appending each character to a StringBuilder, and then producing a string at the end. There's also a couple of function calls mixed in. Would've been nice if Substring could simply take -1 as a "length" argument meaning "end of string". –

2016年12月2日 · But if you required this then you can use PATINDEX along with SUBSTRING to get what you want, SELECT ...