This is a document that has not been written before. I don’t know if it will help, so I will release it.
1. Basic string functions
The most commonly used method: String.Length, to calculate the length of a string.
| CompatreTo |
Alphabetically compare character sizes one by one, if the former is greater than the latter, return 1, otherwise return -1, if the same return 0 |
| Concat |
concatenates two specified strings String.Concat(VarName1,VarName2) |
| Contains |
Determine whether the string contains a specific string, if it does, return true, otherwise return false String.Contains(“text”) |
| EndsWith |
Determine whether the string ends with a certain string, return true, or return false |
| Format |
Convert Object to string (and insert it into another text) String.Format(“{0} is {1}”,VarName1,VarName2) |
| Join |
Concatenates elements in a collection and displays them as a string String.Join(“i”,CollVarName1) |
| IndexOf |
Find the position where a certain character appears for the first time in the string, if it exists, return the position where the string begins, otherwise return -1 VarName.IndexOf(“a”) |
| IsNullOrEmpty |
Determine whether the string is an empty string or a null value |
| LastIndexOf |
Find the last occurrence of a certain string in the string, if it exists, return the position where the string begins, and return -1 if it does not exist |
| PadLeft |
It means to return a string of the specified length, if it is less than this length, add a space to the left, if it is greater than this length, return the original value |
| PadRight |
It refers to returning a string of a specified length. If it is less than this length, add a space to the right. If it is greater than this length, return the original value |
| ToLower |
Refers to the string converted to a lowercase string |
| ToUpper |
Refers to the string converted to an uppercase string |
| Trim |
means to remove the spaces before and after |
| TrimLeft |
remove spaces on the left |
| TrimRight |
remove spaces on the right |
| Replace(strOld,strNew) |
Refers to replace the previous string with the latter string, and return after replacement VarName.Replace(“original”,”replaced”) |
| Substring(stratIndex,Length) |
The first parameter is to start intercepting from a certain position, the latter is the interception length, if not defaulted to the end VarName1.Substring(startIndex,length) |
| Remove(stratIndex,Length) |
The first parameter is to remove from a certain position, the latter is the interception length, if not defaulted to the end |
| ToCharArray |
convert string to char array |
| Split(char c) |
Split a string in a string into N string arrays VarName.Split(“l”c)(index) |
| Insert(Index,string) |
Refers to inserting a string after the Index position |
| Equals |
The character order compares the character size one by one, if the same returns True, otherwise returns False |