Comparing a String to the Beginning or End of a Second String
You need to determine whether a string is at the head or tail of a second string. In addition, the case sensitivity of the search needs to be controlled.
Use the EndsWith or StartsWith instance method on a string object. Comparisons with EndsWith and StartsWith are always case-sensitive. The following code compares the value in the string variable head to the beginning of the string Test:
string head = "str"; string test = "strVarName"; bool isFound = test.StartsWith(head);
The example shown next compares the value in the string variable tail to the end of the string test.
In both examples, the isFound Boolean variable is set to true, since each string is found in test.
To do a case-insensitive comparison, employ the static string.Compare method. The following two examples modify the previous two examples by performing a case-insensitive comparison. The first is equivalent to a case-insensitive StartsWith string search:
string head = "str"; string test = "strVarName"; int isFound = string.Compare(head, 0, test, 0, head.Length, true);
The second is equivalent to a case-insensitive EndsWith string search:
string tail = "Name"; string test = "strVarName"; int isFound = string.Compare(tail, 0, test, (test.Length - tail.Length), tail.Length, true);
Use the BeginsWith or EndsWith instance methods to do a case-sensitive search for a particular string at the beginning or end of a string. The equivalent case-insensitive comparison requires the use of the static Compare method in the String class. If the return value of the Compare method is zero, a match was found. Any other number means that a match was not found.