Visual Basic

Richard Deeming6-Jul-23 22:01

Richard Deeming

6-Jul-23 22:01

Simple enough:

VB.NET

Dim source As String = "202205W24"
Dim index As Integer = source.IndexOf("W"c)
Dim result As String = If(index = -1, String.Empty, source.Substring(index + 1))

This will return the string after the first "W" character, or an empty string if there isn't a "W".

If the source could contain multiple "W" characters, and you want to return the string after the last "W", use LastIndexOf instead of IndexOf.

String.IndexOf Method (System) | Microsoft Learn[^]
String.LastIndexOf Method (System) | Microsoft Learn[^]
String.Substring Method (System) | Microsoft Learn[^]
If Operator - Visual Basic | Microsoft Learn[^]

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

jschell7-Jul-23 11:49

jschell

7-Jul-23 11:49

Was the extra 'c' a test for the observant?

Richard Deeming9-Jul-23 21:16

Richard Deeming

9-Jul-23 21:16

No, it's how VB.NET declares a Char literal:
Type Characters - Visual Basic | Microsoft Learn[^]

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

CURL POST request in VB.NET (json)

jschell10-Jul-23 3:34

jschell

10-Jul-23 3:34

Interesting.

Member 118569042-Jul-23 20:02

Member 11856904

2-Jul-23 20:02

I've been struggling to send this CURL request in VB.NET and hope someone can help..

Here is a link to the documentation of the exact request I'm trying to send.

This is the sample CURL request:

curl -u 'username:token' 'https://api.dev.name.com/v4/domains' -X POST -H 'Content-Type: application/json' --data '{"domain":{"domainName":"example.org"},"purchasePrice":12.99}'

Here is the code that I put together and tested:

Dim uri As New Uri("https://api.dev.name.com/v4/domains")
Dim myUsername As String = txtUsername.Text.Trim & ":" & txtApiKey.Text.Trim
Dim data As String = "{""domain"":{""domainName"":""example.org""},""purchasePrice"":12.99}"
Dim dataByte As Byte()

request = WebRequest.Create(uri)
request.Headers.Add(HttpRequestHeader.Authorization, "Basic " & Convert.ToBase64String(Encoding.UTF8.GetBytes(myUsername)))
request.ContentType = "application/json"
request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36"
request.Method = "POST"

dataByte = Encoding.UTF8.GetBytes(data)
request.GetRequestStream.Write(dataByte, 0, dataByte.Length)

Dim myResp As HttpWebResponse
myResp = request.GetResponse()
Dim myreader As New System.IO.StreamReader(myResp.GetResponseStream)
WebResponse = myreader.ReadToEnd()

MsgBox(WebResponse)

However, the code above always returns a (400) Bad Request.

Here is another variation of pretty much the same code which I tried:

Dim myReq As HttpWebRequest
Dim myResp As HttpWebResponse
Dim myUsername As String = "username:token"

myReq = HttpWebRequest.Create("https://api.dev.name.com/v4/domains")

myReq.Method = "POST"
myReq.ContentType = "application/json"
myReq.Headers.Add("Authorization", "Basic " & Convert.ToBase64String(Encoding.UTF8.GetBytes(myUsername)))

Dim myData As String = "{""domain"":{""domainName"":""example.org""},""purchasePrice"":12.99}"
Dim dataBytes As Byte() = Encoding.UTF8.GetBytes(myData)
myReq.GetRequestStream.Write(dataBytes, 0, dataBytes.Length)

myResp = myReq.GetResponse()
Dim myreader As New System.IO.StreamReader(myResp.GetResponseStream)
WebResponse = myreader.ReadToEnd()

MsgBox(WebResponse)

But, as you can already guess, it also returns a 400 (Bad Request).

Re: CURL POST request in VB.NET (json)

Andre Oosthuizen3-Jul-23 0:38

Andre Oosthuizen

3-Jul-23 0:38

In your CURL command, you are using the '-u' option to provide the username and token as a basic authentication header. In your VB.NET code, you're attempting to encode the credentials manually. Make sure that 'myUsername' has the correct username and token values, and try using the Credentials property of the 'WebRequest' object instead of manually adding the header -

request.Credentials = New NetworkCredential(txtUsername.Text.Trim, txtApiKey.Text.Trim)

The JSON data you're sending in the CURL command needs to be properly serialized before sending it, we use Newtonsoft.Json, not sure if it will help in your situation, if so you can use it where you create an anonymous type to represent the JSON structure and then serializes it using 'JsonConvert.SerializeObject()' -

Imports Newtonsoft.Json

Dim domainData As New With {
    .domain = New With {
        .domainName = "example.org"
    },
    .purchasePrice = 12.99
}

Dim data As String = JsonConvert.SerializeObject(domainData)

You need to close the request stream before sending the request -

request.GetRequestStream.Close()

Instead of directly displaying returned responses in a message box, you can return the status codes and any error messages further by using -

Dim statusCode As Integer = CType(myResp, HttpWebResponse).StatusCode
Dim responseText As String = String.Empty

If statusCode = HttpStatusCode.OK Then
    Dim myreader As New System.IO.StreamReader(myResp.GetResponseStream)
    responseText = myreader.ReadToEnd()
End If

MsgBox(responseText)

I hope any of these suggestions help.

Re: CURL POST request in VB.NET (json)

Member 118569043-Jul-23 22:37

Member 11856904

3-Jul-23 22:37

Hey Andre,
Thanks so much for your detailed reply and explanation! I imported Newtonsoft.json no problem and tried implementing your changes. On a positive note, I'm no longer getting a (400) Bad Request reply. However, I'm now getting a (401) Unauthorized response. I've double checked my login details and made sure they were correct. I also tried testing in both the OTE (operational test environment) and the LIVE environment because the details are slightly different for each, but received the same error on both.

Could this be due to how the credentials are now being passed?

Also, if I close "GetRequestStream" before sending the request then I get a message the connection was suddenly terminated when trying to send the request. However, if I put it directly after writing to the stream that issue goes away. Here is a look at my updated code:

Dim uri As New Uri("https://api.dev.name.com/v4/domains")
Dim domainData As New With {
    .domain = New With {
        .domainName = "example.org"
    },
    .purchasePrice = 12.99
}

Dim data As String = JsonConvert.SerializeObject(domainData)
Dim dataByte As Byte()

request = WebRequest.Create(uri)
request.Credentials = New NetworkCredential(txtUsername.Text.Trim, txtApiKey.Text.Trim)
request.ContentType = "application/json"
request.Method = "POST"

dataByte = Encoding.UTF8.GetBytes(data)
request.GetRequestStream.Write(dataByte, 0, dataByte.Length)
request.GetRequestStream.Close()

Dim myResp As HttpWebResponse
myResp = request.GetResponse()
Dim statusCode As Integer = CType(myResp, HttpWebResponse).StatusCode
Dim responseText As String = String.Empty

If statusCode = HttpStatusCode.OK Then
Dim myreader As New System.IO.StreamReader(myResp.GetResponseStream)
responseText = myreader.ReadToEnd()
End If

MsgBox(responseText)

Any suggestions? Thanks again!

Re: CURL POST request in VB.NET (json)

Andre Oosthuizen3-Jul-23 23:22

Andre Oosthuizen

3-Jul-23 23:22

Closing the stream - my bad, I added it prematurely. D'Oh! | :doh:

Please disregard my suggestion to close the request stream before sending the request or add it after the stream were read.

(401) Unauthorized response, it seems that your server did not accept the given credentials as valid. - There are a few things you can try.

Make sure that the API you are accessing is expecting basic authentication and that the credentials should be provided in the Authorization header. If the API expects a different authentication method, such as API keys or OAuth, you will need to adjust your authentication to accept the request as per their requirements.

Check that the API endpoint you are using (https://api.dev.name.com/v4/domains) is 100% correct.

To isolate or debug the issue, you could try using a different client, such as cURL or Postman, with the same credentials and endpoint. This might help determine if the problem lies with the code or if there might be an issue with the credentials or API itself.

Check your API documentation to make sure that you are following the correct authentication process and that there are no additional steps required.

Hope this points you in the right direction.

record device!!

Member Alienoiz19-Jun-23 6:31

19-Jun-23 6:31

hey..me again..at least i keep the forum moving :P ...thanks for your help...i have another question sorry...
i have this code

VB.NET

<pre>Public Class SSVoiceRecordCtrl

    '-----------------------------------------------------
    '   Name    :   SoundRecording.cls
    '   Author  :   Suresh Suthar
    '
    '   Notes   :   A record class, which when turned
    '           :   into an object lets you record sound
    '           :   through mic, cd-line, etc... into a file
    '-----------------------------------------------------

    ' -=-=-=- PROPERTIES -=-=-=-
    ' FileName      Determines the name of the file used (wav only)
    ' State        The current status of the object (Read Only)
    'SoundFormat    The Formate for Recording File

    ' -=-=-=- METHODS -=-=-=-=-
    ' PauseRecord     Toggle pause the record (if you are already recording)
    ' StartRecord     Start Recording (you must have been set a good filename)
    ' StopRecord      Stop recording (and will save the sound into <filename>)

    '-------------------------------------------------------------
    ' NOTES
    ' -----
    '
    ' Before you can Start or Stop recording you must set a good
    ' filename which the class will use to save your sound into.
    '--------------------------------------------------------------

    ''>>How To Use (Sample Coding)
    ''First Add This Control To Your Project And then Named it rec
    'Try
    'If rec.State = SSVoiceRecordCtrl.SSVoiceRecordCtrl.MyState.Recording Or rec.State = SSVoiceRecordCtrl.SSVoiceRecordCtrl.MyState.Paused Then
    '     rec.CloseRecord()
    'End If
    'If rec.State = SSVoiceRecordCtrl.SSVoiceRecordCtrl.MyState.Idle Then
    '              rec.SoundFormat = SSVoiceRecordCtrl.SSVoiceRecordCtrl.SoundFormats.Mono_6kbps_8_Bit
    '              rec.FileName = "C:\Test.wav" 'Wav File Only (Extension Should Be There)
    '              rec.StartRecord()
    'End If
    'Catch ex As Exception
    '      MsgBox("Sound Recording Error : " & ex.Message & vbNewLine & "Please Contact IT Department", MsgBoxStyle.Information)
    'End Try
    ''Stop Recording And Save the File
    'rec.StopRecord
    ''>>>

    Private Declare Function mciSendString Lib "winmm.dll" Alias "mciSendStringA" (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, ByVal uReturnLength As Integer, ByVal hwndCallback As Integer) As Integer

    Dim lSamples, lRet, lBits, lChannels As Integer
    Dim iBlockAlign As Short
    Dim lBytesPerSec As Integer

    'For Images
    Dim J As Integer = 1
    Public Enum SoundFormats
        Mono_6kbps_8_Bit
        Mono_8kbps_8_Bit
        Mono_11kbps_8_Bit
        Mono_16kbps_8_Bit
        Mono_22kbps_8_Bit
        Mono_32kbps_8_Bit
        Mono_44kbps_8_Bit
        Mono_48kbps_8_Bit
        Stereo_24kbps_16_Bit
        Stereo_32kbps_16_Bit
        Stereo_44kbps_16_Bit
        Stereo_64kbps_16_Bit
        Stereo_88kbps_16_Bit
        Stereo_1288kbps_16_Bit
        Stereo_176kbps_16_Bit
        Stereo_192kbps_16_Bit
    End Enum

    Public Enum MyState
        Idle
        Recording
        Paused
    End Enum

    Private xState As MyState
    Public ReadOnly Property State() As MyState
        Get
            State = xState
        End Get
    End Property

    Private _SoundFormat As SoundFormats
    Public Property SoundFormat() As SoundFormats
        Get
            SoundFormat = _SoundFormat
        End Get
        Set(ByVal Value As SoundFormats)
            _SoundFormat = Value
        End Set
    End Property

    Private Sub GetSoundFormat()
        If _SoundFormat = SoundFormats.Mono_6kbps_8_Bit Then
            lSamples = 6000 : lBits = 8 : lChannels = 1
        ElseIf _SoundFormat = SoundFormats.Mono_8kbps_8_Bit Then
            lSamples = 8000 : lBits = 8 : lChannels = 1
        ElseIf _SoundFormat = SoundFormats.Mono_11kbps_8_Bit Then
            lSamples = 11025 : lBits = 8 : lChannels = 1
        ElseIf _SoundFormat = SoundFormats.Mono_16kbps_8_Bit Then
            lSamples = 16000 : lBits = 8 : lChannels = 1
        ElseIf _SoundFormat = SoundFormats.Mono_22kbps_8_Bit Then
            lSamples = 22050 : lBits = 8 : lChannels = 1
        ElseIf _SoundFormat = SoundFormats.Mono_32kbps_8_Bit Then
            lSamples = 32000 : lBits = 8 : lChannels = 1
        ElseIf _SoundFormat = SoundFormats.Mono_44kbps_8_Bit Then
            lSamples = 44100 : lBits = 8 : lChannels = 1
        ElseIf _SoundFormat = SoundFormats.Mono_48kbps_8_Bit Then
            lSamples = 48000 : lBits = 8 : lChannels = 1
        ElseIf _SoundFormat = SoundFormats.Stereo_24kbps_16_Bit Then
            lSamples = 6000 : lBits = 16 : lChannels = 2
        ElseIf _SoundFormat = SoundFormats.Stereo_32kbps_16_Bit Then
            lSamples = 8000 : lBits = 16 : lChannels = 2
        ElseIf _SoundFormat = SoundFormats.Stereo_44kbps_16_Bit Then
            lSamples = 11025 : lBits = 16 : lChannels = 2
        ElseIf _SoundFormat = SoundFormats.Stereo_64kbps_16_Bit Then
            lSamples = 16000 : lBits = 16 : lChannels = 2
        ElseIf _SoundFormat = SoundFormats.Stereo_88kbps_16_Bit Then
            lSamples = 22050 : lBits = 16 : lChannels = 2
        ElseIf _SoundFormat = SoundFormats.Stereo_1288kbps_16_Bit Then
            lSamples = 32000 : lBits = 16 : lChannels = 2
        ElseIf _SoundFormat = SoundFormats.Stereo_176kbps_16_Bit Then
            lSamples = 44100 : lBits = 16 : lChannels = 2
        ElseIf _SoundFormat = SoundFormats.Stereo_192kbps_16_Bit Then
            lSamples = 48000 : lBits = 16 : lChannels = 2
        End If
        iBlockAlign = lChannels * lBits / 8
        lBytesPerSec = lSamples * iBlockAlign
    End Sub
    Private FName As String
    Public Property FileName() As String
        Get
            FileName = FName
        End Get
        Set(ByVal Value As String)
            FName = Value
        End Set
    End Property


    Public Function StartRecord() As Boolean
        Call GetSoundFormat()
        On Error GoTo ER
        If FName = "" Then GoTo ER
        Dim i As Integer
        i = mciSendString("open new type waveaudio alias capture", vbNullString, 0, 0)
        I = mciSendString("set capture samplespersec " & lSamples & " channels " & lChannels & " bitspersample " & lBits & " alignment " & iBlockAlign & " bytespersec " & lBytesPerSec, vbNullString, 0, 0)
        I = mciSendString("record capture", vbNullString, 0, 0)
        xState = MyState.Recording
        StartRecord = True
        picStatus.Image = imgList.Images(1)
        Timer1.Enabled = True
        Exit Function
ER:
        StartRecord = False
        Dim SSVoiceRecordControlExec As New ArgumentException("File Name Not Specified.")
        Throw SSVoiceRecordControlExec
    End Function

    Public Function StopRecord() As Boolean
        On Error GoTo ER
        If FName = "" Then GoTo ER
        Dim i As Integer
        I = mciSendString("save capture " & FName, vbNullString, 0, 0)
        I = mciSendString("close capture", vbNullString, 0, 0)
        xState = MyState.Idle
        StopRecord = True
        picStatus.Image = imgList.Images(0)
        Timer1.Enabled = False
        Exit Function
ER:
        i = mciSendString("close capture", vbNullString, 0, 0)
        StopRecord = False
        Dim SSVoiceRecordControlExec As New ArgumentException("File Name Not Specified.")
        Throw SSVoiceRecordControlExec
    End Function

    ''Closing Recording But Not Saved
    Public Sub CloseRecord()
        Dim i As Integer
        i = mciSendString("close capture", vbNullString, 0, 0)
        xState = MyState.Idle
        picStatus.Image = imgList.Images(0)
        Timer1.Enabled = False
    End Sub

    Private Sub Class_Initialize_Renamed()
        xState = MyState.Idle
    End Sub
    Private Sub Class_Terminate_Renamed()
        StopRecord()
    End Sub
    Protected Overrides Sub Finalize()
        Class_Terminate_Renamed()
        MyBase.Finalize()
    End Sub

    Public Function PauseRecord() As Boolean
        On Error GoTo ER
        If FName = "" Then GoTo ER
        Dim RS As String
        Dim cb, I As Integer
        RS = Space(128)
        If xState = MyState.Paused Then
            I = mciSendString("record capture", vbNullString, 0, 0)
            xState = MyState.Recording
            picStatus.Image = imgList.Images(1)
            Timer1.Enabled = True
        ElseIf xState = MyState.Recording Then
            I = mciSendString("pause capture", vbNullString, 0, 0)
            xState = MyState.Paused
            picStatus.Image = imgList.Images(0)
            Timer1.Enabled = False
        End If
        PauseRecord = True
        Exit Function
ER:
        PauseRecord = False
        Dim SSVoiceRecordControlExec As New ArgumentException("File Name Not Specified.")
        Throw SSVoiceRecordControlExec
    End Function

    Private Sub SSVoiceRecordCtrl_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        picStatus.Image = imgList.Images(0)
    End Sub

    Private Sub picStatus_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles picStatus.DoubleClick
        System.Diagnostics.Process.Start("SNDVOL32.EXE")
    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        If J = 1 Then
            picStatus.Image = imgList.Images(J)
            J += 1
        Else
            picStatus.Image = imgList.Images(J)
            J = 1
        End If
    End Sub
End Class

i understand the code by i do not see where to change the sound source for ex. to line in...
they say this

Notes   :   A record class, which when turned
   '           :   into an object lets you record sound
   '           :   through mic, cd-line, etc... into a file

Richard MacCutchan19-Jun-23 6:50

19-Jun-23 6:50

Try asking Suresh Sutha, it's his/her code.

Member Alienoiz19-Jun-23 7:08

19-Jun-23 7:08

Probably deprecated...i will try NAudio...is it good alternative?

Member Alienoiz19-Jun-23 8:30

19-Jun-23 8:30

according to the code...may i add more of these (24-bits)

lSamples = 32000 : lBits = 16 : lChannels = 2
 ElseIf _SoundFormat = SoundFormats.Stereo_176kbps_16_Bit Then
     lSamples = 44100 : lBits = 16 : lChannels = 2
 ElseIf _SoundFormat = SoundFormats.Stereo_192kbps_16_Bit Then
     lSamples = 48000 : lBits = 16 : lChannels = 2
 End If

i would like to have

ElseIf _SoundFormat = SoundFormats.Stereo_192kbps_24_Bit Then
            lSamples = 48000 : lBits = 24 : lChannels = 2

Richard MacCutchan19-Jun-23 9:12

19-Jun-23 9:12

Sorry, no idea. As I said you need to talk to the person who wrote the code.

Member Alienoiz19-Jun-23 9:34

19-Jun-23 9:34

Ok thanks ...i will try..i just would like to know how to select the input source device...i think is just what misses in my new project....now im trying to make a sound recording..but i would like to record mic,line in and if possible desktop sounds..

Ralf Meier20-Jun-23 4:05

Ralf Meier

20-Jun-23 4:05

I took also a look onto the Code and I can't aslo not find a Property like requested by you.
For me the posted Code is incomplete and also not able to make any recording.
So you really have to ask the person who has written this code for a complete Code ... or you should look anywhere else for Code which matches to your requirement ...

Listbox Highlight color!

Member Alienoiz18-Jun-23 5:26

18-Jun-23 5:26

hey guys...can anyone tell me how to chnage the highlight color for my listbox?
i tried some google snippets but no luck...
Thanks!!

Richard MacCutchan18-Jun-23 5:40

18-Jun-23 5:40

See this question Change the Highlight colour of a Listbox[^]. See also the sample code at ListBox.ObjectCollection Class (System.Windows.Forms) | Microsoft Learn[^].

modified 18-Jun-23 11:47am.

Member Alienoiz18-Jun-23 6:00

18-Jun-23 6:00

hi..yes im using this code:

<pre>   Private Sub ListBox1_DrawItem(sender As Object, e As DrawItemEventArgs) Handles ListBox1.DrawItem
        If ListBox1.SelectedItem <> "" Then
            e.DrawBackground()
            If (e.State And DrawItemState.Selected) = DrawItemState.Selected Then
                e.Graphics.FillRectangle(Brushes.Red, e.Bounds)
            End If
            Using b As New SolidBrush(e.ForeColor)
                e.Graphics.DrawString(ListBox1.GetItemText(ListBox1.Items(e.Index)), e.Font, b, e.Bounds)
            End Using
            e.DrawFocusRectangle()
        End If
    End Sub

but it seems that the items text are not appearing in the right color..only when i click them...
this is hard to explain...

Richard MacCutchan18-Jun-23 6:39

18-Jun-23 6:39

I have just tried it with the MSDN code in the link I gave you and it seems to work - with one correction. The following block:

If ((e.State And DrawItemState.Selected) = DrawItemState.Selected) Then
    e.Graphics.FillRectangle(Brushes.CornflowerBlue, e.Bounds)
Else

is missing the parentheses around e.State And DrawItemState.Selected.

Member Alienoiz18-Jun-23 6:49

18-Jun-23 6:49

i changed the color to white and it shows only white rectangles but no text!!!..i wish i can put an image or video..sometimes one image worths more than a thousand words!!

Member Alienoiz18-Jun-23 7:08

18-Jun-23 7:08

OK..i went a bit foward..it is formating but when i load my files they do not appear in the listbox..i have to click the listbox to show the files loaded..

Member Alienoiz18-Jun-23 7:47

18-Jun-23 7:47

When i load the files into the listbox nothing shows but if i click where the items should be they appear with the formated style

Member Alienoiz18-Jun-23 8:41

18-Jun-23 8:41

i think is because im starting with an empty listbox...as i said...when i load the files they do not show..but..if i click where they were supposed to be they show with the different highlight color (red for ex)...

Richard MacCutchan18-Jun-23 21:39