How to: Write Characters to a String
.NET Framework 3.5
The following code example writes a certain number of characters from a character array into an existing string, starting at a specified place in the array. Use StringWriter to do this, as demonstrated below.
using System; using System.IO; using System.Text; public class CharsToStr { public static void Main(String[] args) { // Create an instance of StringBuilder that can then be modified. StringBuilder sb = new StringBuilder("Some number of characters"); // Define and create an instance of a character array from which // characters will be read into the StringBuilder. char[] b = {' ','t','o',' ','w','r','i','t','e',' ','t','o','.'}; // Create an instance of StringWriter // and attach it to the StringBuilder. StringWriter sw = new StringWriter(sb); // Write three characters from the array into the StringBuilder. sw.Write(b, 0, 3); // Display the output. Console.WriteLine(sb); // Close the StringWriter. sw.Close(); } }
This example illustrates the use of a StringBuilder to modify an existing string. Note that this requires an additional using declaration, since the StringBuilder class is a member of the System.Text namespace. Also, instead of defining a string and converting it to a character array, this is an example of creating a character array directly and initializing it.
This code produces the following output.
Some number of characters to
