IndexOf(): method in string Class in C# returns the index of the first occurrence of the specified substring.
Syntax:int string.IndexOf(string str)
Integer - If the parameter String occurred as a substring in the specified String
it returns position of the first character of the substring.
If it does not occur as a substring, -1 is returned.
Example:"This is a test".IndexOf("Test") returns 10
"This is a test".IndexOf("vb") returns -1
Clone(): method creates and returns a copy of string object. The CSharp string Clone() method returns a reference to this instance of string.
string str = "Clone() Test";
string clonedString = null;
clonedString = (String)str.Clone();
Compare(): function compares two strings lexicographically . The comparison is based on the Unicode value of each character in the string.
Syntax: int string.Compare(string str1,string str2)
It returns an Integer indication lexical relationship between the two comprehends
Integer : returns less than zero, zero or greater than zero.
Less than zero : str1 is less than str2
zero : str1 is equal to str2
Greater than zero : str1 is greater than str2
Concat(): method Concatenates the two specified string and create a new string.
Syntax: string concat(string str1,string str2)
EndsWith(): method check if the Parameter String EndsWith the Specified String
Syntax: bool string.EndsWith(string suffix)
Equals(): method is to check the specified two String Object values are same or not
Syntax: bool string.Equals(string str1,string str2)
Insert(): method will insert a String in a specified index in the String instance.
Syntax: string string.Insert(int ind,string str)
"This is Test".Insert(8,"Insert ") returns "This is Insert Test"
TryParse(): method is using for determine whether a string is a valid representation of a specified numeric type or not. TryParse method that is implemented by all primitive numeric types and also by types such as DateTime and IPAddress.
Syntax: bool int.TryParse(string param , out int result)
Substring():string input = "OneTwoThree";
string sub = input.Substring(0, 3);
//Output : One
string sub = input.Substring(3);
//Output : TwoThree
string sub = input.Substring(3, 3);
//Output : Two
string sub = input.Substring(0, input.Length - 5);
//Output : OneTwo
string CultureInfo(): The String Class is a sealed class , so you cannot inherit another class from the String class. ToTitleCase converts the first character of a word to uppercase and the rest of the characters to lowercase.
A neutral culture is specified by only the two-letter lowercase language code. For example, "fr" specifies the neutral culture for French, and "de" specifies the neutral culture for German.
System.Globalization.CultureInfo cultureInfo = _new System.Globalization.CultureInfo("en-US");
The CultureInfo class renders culture-specific information, such as the associated language, sublanguage, country/region, calendar, and cultural conventions. The following C# source code shows how to convert a string to Title Case.
string _str = null;
System.Globalization.CultureInfo cultureInfo = new System.Globalization.CultureInfo("en-US");
_str = cultureInfo.TextInfo.ToTitleCase("make first letter capital");
MessageBox.Show (_str);
