Binary reader in vb.net

Binary Reader Object works at lower level of Streams. BinaryReader is used for read premitive types as binary values in a specific encoding stream. Binaryreader Object works with Stream Objects that provide access to the underlying bytes. For creating a BinaryReader Object , you have to first create a FileStream Object and then pass BinaryReader to the constructor method .

Dim readStream As FileStream

readStream = New FileStream("c:\testBinary.dat", FileMode.Open)

Dim readBinary As New BinaryReader(readStream)

The main advantages of Binary information is that stores files as Binary format is the best practice of space utilization.

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Imports System.IO

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, _

ByVal e As System.EventArgs) Handles Button1.Click

        Dim readStream As FileStream

        Dim msg As String

        Try

readStream = New FileStream("c:\testBinary.dat", FileMode.Open)

            Dim readBinary As New BinaryReader(readStream)

            msg = readBinary.ReadString()

            MsgBox(msg)

            readStream.Close()

        Catch ex As Exception

            MsgBox(ex.ToString)

        End Try

    End Sub

End Class

BinaryWriter you can use in the same way to write as binary.

StreamReader in vb.net

In this tutorial, you learn how to read the text from a text file using the StreamReader. using StreamReader  you can read file and write file append the text to file .

copy and paste below Code:

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If System.IO.File.Exists(TextBox1.Text) = True Then
            Dim objreader As New System.IO.StreamReader(TextBox1.Text)
            TextBox2.Text = objreader.ReadToEnd
            objreader.Close()
        Else
            MessageBox.Show("That file does not exist!")
        End If
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        TextBox2.Clear()
    End Sub

End Class

How to make text file reader in vb.net?

How to make my own text file reader in vb.net?

Step1:

Open Microsoft visual studio

Step2:

Create file newà windows applicationàrename it as text file reader

Step3:

Drag and drop the list box, three buttons,

Step4:

Change the form properties as you wish

Step5:

Copy the below code and paste in code window

Public Class Form1

    Private SubButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) HandlesButton1.Click

        Using FD As New OpenFileDialog()

            FD.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"

            If FD.ShowDialog = Windows.Forms.DialogResult.OK Then

                ListBox1.Items.Clear()

                ListBox1.Items.AddRange(IO.File.ReadAllLines(FD.FileName))

            End If

        End Using

    End Sub

  

    Private SubButton2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) HandlesButton2.Click

        Close()

    End Sub

    Private SubButton3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) HandlesButton3.Click

        ListBox1.Text = ""

    End Sub

    Private SubForm1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) HandlesMyBase.Load

        ListBox1.Text = ""

    End Sub

End Class

Output:

Read the text file just click the read button to read.