StringBuilder.GetChunks Method


Returns an object that can be used to iterate through the chunks of characters represented in a ReadOnlyMemory<Char> created from this StringBuilder instance.

 System::Text::StringBuilder::ChunkEnumerator GetChunks();
public System.Text.StringBuilder.ChunkEnumerator GetChunks ();
member this.GetChunks : unit -> System.Text.StringBuilder.ChunkEnumerator
Public Function GetChunks () As StringBuilder.ChunkEnumerator


An enumerator for the chunks in the ReadOnlyMemory<Char>.


You can iterate the chunks in the memory range with code like the following:

foreach (ReadOnlyMemory<char> chunk in sb.GetChunks())
    foreach(char ch in chunk.Span)
        { /* operations on ch */ }

The purpose of this method is to efficiently extract the data of a constant StringBuilder. If the StringBuilder is modified while the chunk enumeration is incomplete, the result is undefined. StringBuilder is also not thread-safe, so operating on it with concurrent threads is illegal.

The ReadOnlyMemory<T> chunks returned are not guaranteed to remain unchanged if the StringBuilder is modified, so do not cache them for later use.

Creating a ReadOnlySpan<T> from a ReadOnlyMemory<T> (as the ReadOnlyMemory<T>.Span method does in the previous example) is expensive, so create a local variable for the span if you need to use it in a nested for statement. For example:

foreach (ReadOnlyMemory<char> chunk in sb.GetChunks())
    var span = chunk.Span;
    for(int i = 0; i < span.Length; i++)
        /* operations on span[i] */

Applies to