How to VB.NET TextReader operations

By: Rajesh P.S.

TextReader class in VB.Net is a fundamental component that facilitates the reading of character-based data from a variety of sources. It provides a high-level abstraction for reading text data, making it easier for developers to handle and process textual information.

TextReader class

The TextReader class serves as a base class for reading characters from various sources, including files, streams, and other input streams. It offers a range of methods and properties that enable developers to efficiently read and manipulate text data.

One of the primary advantages of using the TextReader class is its versatility. It abstracts away the underlying details of reading from different sources, providing a unified interface for working with text data. This allows developers to write code that is not tightly coupled to a specific data source, making their applications more flexible and modular.

Read(), ReadLine(), and ReadToEnd()

The TextReader class offers methods such as Read(), ReadLine(), and ReadToEnd() that enable sequential reading of characters or lines from the input stream. It also provides properties like EndOfStream, which allows developers to check if the end of the input stream has been reached.

Full Source VB.NET

Imports System.IO Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click Try Dim line As String Dim readFile As System.IO.TextReader = New _ StreamReader("C:\TextReader.txt") While True line = readFile.ReadLine() If line Is Nothing Then Exit While Else MsgBox(line) End If End While readFile.Close() readFile = Nothing Catch ex As IOException MsgBox(ex.ToString) End Try End Sub End Class

Conclusion

TextReader class in VB.NET is a versatile tool that facilitates the reading and processing of character-based data. It abstracts away the complexities of reading from different sources, allowing developers to handle text data efficiently and effectively within their applications.

Next > How to VB.NET Simple TextReader

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