Redirecting Console.Write

I wrote the below-mentioned code from an amalgamation of c# tutorials about redirecting Console.Write or Console.WriteLine to a textbox text field. I realized this was bad since if I invoke any kind of .Close() method will erase the textbox which is the opposite of what I want to do.

Imports System.Text

Imports System.IO



Namespace ConsoleRedirection

Public Class TextBoxStreamWriter

    Inherits TextWriter



    Private _output As TextBox = Nothing



    Public Sub New(ByVal output As TextBox)

        _output = output

    End Sub



    Public Overrides Sub WriteLine(ByVal value As String)

        MyBase.WriteLine(value)

        _output.AppendText(String.Format("[{0}] {1}" + vbNewLine, DateTime.Now, value.ToString()))

    End Sub



    Public Overrides ReadOnly Property Encoding As Encoding

        Get

            Return System.Text.Encoding.UTF8

        End Get

    End Property

End Class

End Namespace

Is there anyway, besides loading a text file, that I can have all Console output redirected to either a textbox?

To answer a question from comments. (This code was originally found here: https://saezndaree.wordpress.com/2009/03/29/how-to-redirect-the-consoles-output-to-a-textbox-in-c/... But was converted over to VB)

In a separate form, the code is invoked by declaring a TextWriter.

Private _writer As TextWriter = New TextBoxStreamWriter(frmDebugLog.txtDebugLog)

Then as part of the .Load of a parent form:

Console.SetOut(_writer)

On a later portion of the form, the frmDebugLog is invoked by using frmDebugLog.Show()

When that window, frmDebugLog, is closed... that form and its textbox contents are discarded.

edited Nov 19 '18 at 23:57

asked Nov 19 '18 at 22:56

Paul Williams

83662856

So, the title mentions a DataTable while the question mentions a TextBox or a DataGridView. You might want to proof-read your questions before submitting. Regardless, you can put whatever you want in that overridden WriteLine method. If you want to write to a DataTable then write to a DataTable. If you want to write to a DataGridView then do so. Just put whatever code you want executed in that WriteLine method. If you want to be able to write to different destinations then you could have multiple constructors.

– jmcilhinney
Nov 19 '18 at 23:13

@jmcilhinney I thought I edited that out, noted. Another idea I had, previously, was to redirect it to a datatable. Problem was, it's the same problem... I close the object, the table gets wiped. (That and I got lost on how to set up the table in the first place.) So I focused on the textbox still.

– Paul Williams
Nov 19 '18 at 23:22

1

OT: TextBoxStreamWriter is a bad name for that class because there is no Stream involved. The StreamWriter class is named that because it writes to a Stream. That class should just be named TextBoxWriter.

– jmcilhinney
Nov 19 '18 at 23:42

How exactly are you using that class? There's nothing about it that I can see that should cause a destination TextBox to be cleared as far as I can see. Maybe I'm missing something but I'd like to test it exactly as you're using it to see for myself.

– jmcilhinney
Nov 19 '18 at 23:45

@jmcilhinney Edited the additional details.

– Paul Williams
Nov 19 '18 at 23:59

|
show 4 more comments

Imports System.Text

Imports System.IO



Namespace ConsoleRedirection

Public Class TextBoxStreamWriter

    Inherits TextWriter



    Private _output As TextBox = Nothing



    Public Sub New(ByVal output As TextBox)

        _output = output

    End Sub



    Public Overrides Sub WriteLine(ByVal value As String)

        MyBase.WriteLine(value)

        _output.AppendText(String.Format("[{0}] {1}" + vbNewLine, DateTime.Now, value.ToString()))

    End Sub



    Public Overrides ReadOnly Property Encoding As Encoding

        Get

            Return System.Text.Encoding.UTF8

        End Get

    End Property

End Class

End Namespace

Is there anyway, besides loading a text file, that I can have all Console output redirected to either a textbox?

In a separate form, the code is invoked by declaring a TextWriter.

Private _writer As TextWriter = New TextBoxStreamWriter(frmDebugLog.txtDebugLog)

Then as part of the .Load of a parent form:

Console.SetOut(_writer)

On a later portion of the form, the frmDebugLog is invoked by using frmDebugLog.Show()

When that window, frmDebugLog, is closed... that form and its textbox contents are discarded.

edited Nov 19 '18 at 23:57

asked Nov 19 '18 at 22:56

Paul Williams

83662856

So, the title mentions a DataTable while the question mentions a TextBox or a DataGridView. You might want to proof-read your questions before submitting. Regardless, you can put whatever you want in that overridden WriteLine method. If you want to write to a DataTable then write to a DataTable. If you want to write to a DataGridView then do so. Just put whatever code you want executed in that WriteLine method. If you want to be able to write to different destinations then you could have multiple constructors.

– jmcilhinney
Nov 19 '18 at 23:13

@jmcilhinney I thought I edited that out, noted. Another idea I had, previously, was to redirect it to a datatable. Problem was, it's the same problem... I close the object, the table gets wiped. (That and I got lost on how to set up the table in the first place.) So I focused on the textbox still.

– Paul Williams
Nov 19 '18 at 23:22

1

OT: TextBoxStreamWriter is a bad name for that class because there is no Stream involved. The StreamWriter class is named that because it writes to a Stream. That class should just be named TextBoxWriter.

– jmcilhinney
Nov 19 '18 at 23:42

How exactly are you using that class? There's nothing about it that I can see that should cause a destination TextBox to be cleared as far as I can see. Maybe I'm missing something but I'd like to test it exactly as you're using it to see for myself.

– jmcilhinney
Nov 19 '18 at 23:45

@jmcilhinney Edited the additional details.

– Paul Williams
Nov 19 '18 at 23:59

|
show 4 more comments

Imports System.Text

Imports System.IO



Namespace ConsoleRedirection

Public Class TextBoxStreamWriter

    Inherits TextWriter



    Private _output As TextBox = Nothing



    Public Sub New(ByVal output As TextBox)

        _output = output

    End Sub



    Public Overrides Sub WriteLine(ByVal value As String)

        MyBase.WriteLine(value)

        _output.AppendText(String.Format("[{0}] {1}" + vbNewLine, DateTime.Now, value.ToString()))

    End Sub



    Public Overrides ReadOnly Property Encoding As Encoding

        Get

            Return System.Text.Encoding.UTF8

        End Get

    End Property

End Class

End Namespace

Is there anyway, besides loading a text file, that I can have all Console output redirected to either a textbox?

In a separate form, the code is invoked by declaring a TextWriter.

Private _writer As TextWriter = New TextBoxStreamWriter(frmDebugLog.txtDebugLog)

Then as part of the .Load of a parent form:

Console.SetOut(_writer)

On a later portion of the form, the frmDebugLog is invoked by using frmDebugLog.Show()

When that window, frmDebugLog, is closed... that form and its textbox contents are discarded.

edited Nov 19 '18 at 23:57

asked Nov 19 '18 at 22:56

Paul Williams

83662856

Imports System.Text

Imports System.IO



Namespace ConsoleRedirection

Public Class TextBoxStreamWriter

    Inherits TextWriter



    Private _output As TextBox = Nothing



    Public Sub New(ByVal output As TextBox)

        _output = output

    End Sub



    Public Overrides Sub WriteLine(ByVal value As String)

        MyBase.WriteLine(value)

        _output.AppendText(String.Format("[{0}] {1}" + vbNewLine, DateTime.Now, value.ToString()))

    End Sub



    Public Overrides ReadOnly Property Encoding As Encoding

        Get

            Return System.Text.Encoding.UTF8

        End Get

    End Property

End Class

End Namespace

Is there anyway, besides loading a text file, that I can have all Console output redirected to either a textbox?

In a separate form, the code is invoked by declaring a TextWriter.

Private _writer As TextWriter = New TextBoxStreamWriter(frmDebugLog.txtDebugLog)

Then as part of the .Load of a parent form:

Console.SetOut(_writer)

On a later portion of the form, the frmDebugLog is invoked by using frmDebugLog.Show()

When that window, frmDebugLog, is closed... that form and its textbox contents are discarded.

vb.net redirect console

edited Nov 19 '18 at 23:57

asked Nov 19 '18 at 22:56

Paul Williams

83662856

edited Nov 19 '18 at 23:57

asked Nov 19 '18 at 22:56

Paul Williams

83662856

edited Nov 19 '18 at 23:57

asked Nov 19 '18 at 22:56

Paul Williams

83662856

asked Nov 19 '18 at 22:56

Paul Williams

83662856

asked Nov 19 '18 at 22:56

Paul Williams

83662856

So, the title mentions a DataTable while the question mentions a TextBox or a DataGridView. You might want to proof-read your questions before submitting. Regardless, you can put whatever you want in that overridden WriteLine method. If you want to write to a DataTable then write to a DataTable. If you want to write to a DataGridView then do so. Just put whatever code you want executed in that WriteLine method. If you want to be able to write to different destinations then you could have multiple constructors.

– jmcilhinney
Nov 19 '18 at 23:13

@jmcilhinney I thought I edited that out, noted. Another idea I had, previously, was to redirect it to a datatable. Problem was, it's the same problem... I close the object, the table gets wiped. (That and I got lost on how to set up the table in the first place.) So I focused on the textbox still.

– Paul Williams
Nov 19 '18 at 23:22

1

OT: TextBoxStreamWriter is a bad name for that class because there is no Stream involved. The StreamWriter class is named that because it writes to a Stream. That class should just be named TextBoxWriter.

– jmcilhinney
Nov 19 '18 at 23:42

How exactly are you using that class? There's nothing about it that I can see that should cause a destination TextBox to be cleared as far as I can see. Maybe I'm missing something but I'd like to test it exactly as you're using it to see for myself.

– jmcilhinney
Nov 19 '18 at 23:45

@jmcilhinney Edited the additional details.

– Paul Williams
Nov 19 '18 at 23:59

|
show 4 more comments

So, the title mentions a DataTable while the question mentions a TextBox or a DataGridView. You might want to proof-read your questions before submitting. Regardless, you can put whatever you want in that overridden WriteLine method. If you want to write to a DataTable then write to a DataTable. If you want to write to a DataGridView then do so. Just put whatever code you want executed in that WriteLine method. If you want to be able to write to different destinations then you could have multiple constructors.

– jmcilhinney
Nov 19 '18 at 23:13

@jmcilhinney I thought I edited that out, noted. Another idea I had, previously, was to redirect it to a datatable. Problem was, it's the same problem... I close the object, the table gets wiped. (That and I got lost on how to set up the table in the first place.) So I focused on the textbox still.

– Paul Williams
Nov 19 '18 at 23:22

1

OT: TextBoxStreamWriter is a bad name for that class because there is no Stream involved. The StreamWriter class is named that because it writes to a Stream. That class should just be named TextBoxWriter.

– jmcilhinney
Nov 19 '18 at 23:42

How exactly are you using that class? There's nothing about it that I can see that should cause a destination TextBox to be cleared as far as I can see. Maybe I'm missing something but I'd like to test it exactly as you're using it to see for myself.

– jmcilhinney
Nov 19 '18 at 23:45

@jmcilhinney Edited the additional details.

– Paul Williams
Nov 19 '18 at 23:59

So, the title mentions a DataTable while the question mentions a TextBox or a DataGridView. You might want to proof-read your questions before submitting. Regardless, you can put whatever you want in that overridden WriteLine method. If you want to write to a DataTable then write to a DataTable. If you want to write to a DataGridView then do so. Just put whatever code you want executed in that WriteLine method. If you want to be able to write to different destinations then you could have multiple constructors.

– jmcilhinney
Nov 19 '18 at 23:13

@jmcilhinney I thought I edited that out, noted. Another idea I had, previously, was to redirect it to a datatable. Problem was, it's the same problem... I close the object, the table gets wiped. (That and I got lost on how to set up the table in the first place.) So I focused on the textbox still.

– Paul Williams
Nov 19 '18 at 23:22

OT: TextBoxStreamWriter is a bad name for that class because there is no Stream involved. The StreamWriter class is named that because it writes to a Stream. That class should just be named TextBoxWriter.

– jmcilhinney
Nov 19 '18 at 23:42

How exactly are you using that class? There's nothing about it that I can see that should cause a destination TextBox to be cleared as far as I can see. Maybe I'm missing something but I'd like to test it exactly as you're using it to see for myself.

– jmcilhinney
Nov 19 '18 at 23:45

@jmcilhinney Edited the additional details.

– Paul Williams
Nov 19 '18 at 23:59

|
show 4 more comments

1 Answer
1

active

oldest

votes

It appears that you're using the default instance and so only ever one instance at a time. In that case, this will do the job:

Private Shared txtDebugLogText As String



Public Sub New()

    ' This call is required by the designer.

    InitializeComponent()



    ' Add any initialization after the InitializeComponent() call.



    txtDebugLog.Text = txtDebugLogText

End Sub



Protected Overrides Sub OnFormClosed(e As FormClosedEventArgs)

    txtDebugLogText = txtDebugLog.Text

    MyBase.OnFormClosed(e)

End Sub

By using a Shared field, you keep everything within the one class. The current value of that field is loaded into the TextBox first whenever a new instance is created and the text in the current TextBox is persisted to that field whenever an instance is destroyed.

answered Nov 20 '18 at 1:14

jmcilhinney

25.9k22032

add a comment |

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1 Answer
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1 Answer
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active

oldest

votes

It appears that you're using the default instance and so only ever one instance at a time. In that case, this will do the job:

Private Shared txtDebugLogText As String



Public Sub New()

    ' This call is required by the designer.

    InitializeComponent()



    ' Add any initialization after the InitializeComponent() call.



    txtDebugLog.Text = txtDebugLogText

End Sub



Protected Overrides Sub OnFormClosed(e As FormClosedEventArgs)

    txtDebugLogText = txtDebugLog.Text

    MyBase.OnFormClosed(e)

End Sub

answered Nov 20 '18 at 1:14

jmcilhinney

25.9k22032

add a comment |

It appears that you're using the default instance and so only ever one instance at a time. In that case, this will do the job:

Private Shared txtDebugLogText As String



Public Sub New()

    ' This call is required by the designer.

    InitializeComponent()



    ' Add any initialization after the InitializeComponent() call.



    txtDebugLog.Text = txtDebugLogText

End Sub



Protected Overrides Sub OnFormClosed(e As FormClosedEventArgs)

    txtDebugLogText = txtDebugLog.Text

    MyBase.OnFormClosed(e)

End Sub

answered Nov 20 '18 at 1:14

jmcilhinney

25.9k22032

add a comment |

It appears that you're using the default instance and so only ever one instance at a time. In that case, this will do the job:

Private Shared txtDebugLogText As String



Public Sub New()

    ' This call is required by the designer.

    InitializeComponent()



    ' Add any initialization after the InitializeComponent() call.



    txtDebugLog.Text = txtDebugLogText

End Sub



Protected Overrides Sub OnFormClosed(e As FormClosedEventArgs)

    txtDebugLogText = txtDebugLog.Text

    MyBase.OnFormClosed(e)

End Sub

answered Nov 20 '18 at 1:14

jmcilhinney

25.9k22032

It appears that you're using the default instance and so only ever one instance at a time. In that case, this will do the job:

Private Shared txtDebugLogText As String



Public Sub New()

    ' This call is required by the designer.

    InitializeComponent()



    ' Add any initialization after the InitializeComponent() call.



    txtDebugLog.Text = txtDebugLogText

End Sub



Protected Overrides Sub OnFormClosed(e As FormClosedEventArgs)

    txtDebugLogText = txtDebugLog.Text

    MyBase.OnFormClosed(e)

End Sub

answered Nov 20 '18 at 1:14

jmcilhinney

25.9k22032

answered Nov 20 '18 at 1:14

jmcilhinney

25.9k22032

answered Nov 20 '18 at 1:14

jmcilhinney

25.9k22032

answered Nov 20 '18 at 1:14

jmcilhinney

25.9k22032

add a comment |

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