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How to check for null in txtbox and do somthing?

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  #1  
Old September 30th, 2003, 09:01 PM
hamster84 hamster84 is offline
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How to check for null in txtbox and do somthing?
Hello.

I am using visual basic 6.

I have 20 textboxes and i have to load records into the textboxes. After loading, those who have null values inside the textbox, they shall be set to visible = false. Wat can i do abt it?

Thanks.
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  #2  
Old September 30th, 2003, 10:48 PM
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If txtYourTextBox = vbNullString Then
&nbsp;&nbsp;&nbsp;&nbsp;txtYourTextBox.Visible = False
End If
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Old October 1st, 2003, 01:16 AM
hamster84 hamster84 is offline
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Hello Onslaught.

Thanks again for reply my post.

I wonder whether there is a method tt there is no need to repeat the the above coding for 20 times for each textboxes.

Thanks.
You are good! Man
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  #4  
Old October 1st, 2003, 08:03 AM
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Would be best if the text boxes were an array of the same control. It would make loading and interacting with them a lot easier.
The only other way I would know how to automate it would be to check every control on the form and see if it is a textbox and if it is then to do the check on that control.
Something like:
Code:
For Each obj In Me.Controls
    If TypeOf obj = TextBox Then
        If obj = vbNullString Then
            obj.Visible = False
        End If
    End If
Next
This is untested though.
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Old October 1st, 2003, 11:35 AM
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Lightbulb May i comment
Onslaught nice code but please check the syntax!
U r causing an error if that is used
If TypeOf obj = TextBox Then ?
Code:
For Each obj In Me.Controls
    If TypeOf obj Is TextBox Then  'should be Is..?
        If obj = vbNullString Then
            obj.Visible = False
        End If
    End If
Next
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Old October 1st, 2003, 11:45 AM
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I said is was untested, was going from memory
you are correct though I believe
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Old October 1st, 2003, 10:59 PM
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thanks onslaught...!


Quote:
For Each obj In Me.Controls
If TypeOf obj Is TextBox
If obj = vbNullString Then
obj.Visible = False
End If
End If
Next
For Each obj In Me.Controls


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