Question Check textbox if empty??

[gate7cy]

I am using VB.net to create a simple winform. I have the option to save the data I input on that form. I am trying to prevent the user not to save the data if textbox10 is empty. I tried the while loop but I go into an infinite loop. The code is below. The if statement gives the error but allows the user to save.

   While Len(Me.techniciansTextBox.Text) = 0

            MessageBox.Show("Please Enter a Technician To continue")


        End While

Any way how to do this??Thanks for the replies

 

[JuggaloBrotha]

If techniciansTextBox.Text.Trim.Length = 0I Then
    'Has data in it
Else
    'Is empty
End If

 

[gate7cy]

Did not work as the pop up shows up but still my data is saved to the db which I do not want.

 

[gate7cy]

I tried this :

        If techniciansTextBox.TextLength = 0 Then

            MessageBox.Show("Please enter a Technician for the service!")


        Else

Now the data is not saved but the window closes without allowing me to finish entering all the data and saving it

 

[JuggaloBrotha]

All I provided was a way to detect if the data in the textbox was empty or not, I have no idea where you're needing this code, actually I have no idea what you're code even looks like so I can't tell you why the form closes.

 

[gate7cy]

I go it resolved. I had a wrong order on the conditional statements. After re-arranging them all is working fine. Thanks for the replies

 

[InertiaM]

Another way to do this would be to perform some verification logic to everything you want checked:-

    Private Sub techniciansTextBox_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles techniciansTextBox.KeyUp
        VerifyTextboxes()
    End Sub

    Private Sub operatorsTextBox_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles operatorsTextBox.KeyUp
        VerifyTextboxes()
    End Sub

    Private Sub VerifyTextboxes()
        btnSave.enabled = (techniciansTextBox.Text.Trim.Length > 10) andalso (operatorsTextBox.Text.Trim.Length > 5) andalso .......
    End Sub

If you only want to verify textboxes, you can use multiple handles and shorten the code into something like :-

    Private Sub VerifyTextboxes(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles techniciansTextBox.KeyUp, operatorsTextBox.KeyUp
        btnSave.enabled = (techniciansTextBox.Text.Trim.Length > 10) andalso (operatorsTextBox.Text.Trim.Length > 5) andalso .......
    End Sub