Supports iterating over a String object and reading its individual characters. This class cannot be inherited.
Assembly: mscorlib (in mscorlib.dll)
Thetype exposes the following members.
|Clone||Creates a copy of the current object.|
|Dispose||Releases all resources used by the current instance of the class.|
|Equals(Object)||Determines whether the specified object is equal to the current object. (Inherited from Object.)|
|GetHashCode||Serves as the default hash function. (Inherited from Object.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|MoveNext||Increments the internal index of the current object to the next character of the enumerated string.|
|Reset||Initializes the index to a position logically before the first character of the enumerated string.|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
A provides read-only access to the characters in a referenced String object. For example, the foreach statement of the Microsoft Visual Basic and C# programming languages, which iterates through the elements of a collection, retrieves a from a String object in order to iterate through the characters in that object.
A maintains an internal index to the characters in the string the references. The state of the index is invalid when it references a character position logically before the first character or after the last character in the string, and valid when it references a character within the string. The index is initialized to a position logically before the first character, and is set to a position after the last character when the iteration is complete. An exception is thrown if you attempt to access a character while the index is invalid.
The MoveNext method increments the index by one, so the first and subsequent characters are accessed in turn. The Reset method sets the index to a position logically before the first character. The Current property retrieves the character currently referenced by index. The Clone method creates a copy of the .
The following example uses the class to enumerate the individual characters in a string. It instantiates a object by calling the String.GetEnumerator method, moves from one character to the next by calling the MoveNext method, and displays the current character by retrieving the value of the Current property.
Note, however, that the same operation can be performed somewhat more intuitively by using foreach (in C#) or For Each (in Visual Basic), as the following example shows.