How to: Read Characters from a String
The following code example allows you to read a certain number of characters from an existing string, starting at a specified place in the string. Use StringReader to do this, as demonstrated below.
This code defines a string and converts it to an array of characters, which can then be read by using the appropriate StringReader.Read method.
This example reads only the specified number of characters from the string, as follows.
Some number o
Example
Option Explicit On
Option Strict On
Imports System
Imports System.IO
Public Class CharsFromStr
Public Shared Sub Main()
' Create a string to read characters from.
Dim str As [String] = "Some number of characters"
' Size the array to hold all the characters of the string
' so that they are all accessible.
Dim b(24) As Char
' Create an instance of StringReader and attach it to the string.
Dim sr As New StringReader(str)
' Read 13 characters from the array that holds the string, starting
' from the first array member.
sr.Read(b, 0, 13)
' Display the output.
Console.WriteLine(b)
' Close the StringReader.
sr.Close()
End Sub
End Class
using System;
using System.IO;
public class CharsFromStr
{
public static void Main(String[] args)
{
// Create a string to read characters from.
String str = "Some number of characters";
// Size the array to hold all the characters of the string
// so that they are all accessible.
char[] b = new char[24];
// Create an instance of StringReader and attach it to the string.
StringReader sr = new StringReader(str);
// Read 13 characters from the array that holds the string, starting
// from the first array member.
sr.Read(b, 0, 13);
// Display the output.
Console.WriteLine(b);
// Close the StringReader.
sr.Close();
}
}
See Also
Tasks
How to: Create a Directory Listing
How to: Read and Write to a Newly Created Data File
How to: Open and Append to a Log File
How to: Read Text from a File
How to: Write Text to a File
How to: Write Characters to a String
Reference
StringReader
StringReader.Read