Textbox and Save button in visual basic

There are 2 ways to solve ur problem..
 
1) Method First:
 
(a)U should change the Property of "Save" Button to enable false at the time of form load event (or set the "Save" Button enable property to False at design time from the property window in VB 6.0)
 
(b) Then enable the "Save" Button Property only when Textbox properties of all 1 or 2 or all 3 (i.e. Name, Last Name & Address textbox changing event)
 
By this u can Stop the user & validate that whatever user fill the Text box and u can stop user to click on save button without filling the Textboxes and there will be no empty recorded will be inserted into the Database.
 
2) Method Second:
(a) U can also change the Property of "Save" Button to enable false at the Run-time. By placing the following code on the form load event.
 
(Assuming that ur Save Button name is btnSave)
 

Form Load()
 
   btnSave.enable=False
 
End Sub

 

(b) Placed following code on the TextBox(s) changing event
(Assuming that ur Name, Last Name and Address Textboxes names are txtName, txtLName & txtAddress respectively)
 

 

Private Sub txtName_Changing(ByVal sender As Object, ByVal e As System.EventArgs)
 
        If Not txtName.Text = "" Then
            btnSave.Enabled = True
        End If
 
Private Sub txtLName_Changing(ByVal sender As Object, ByVal e As System.EventArgs)
 
        If Not txtLName.Text = "" Then
             btnSave.Enabled = True
        End If
 
Private Sub txtAddress_Changing(ByVal sender As Object, ByVal e As System.EventArgs)
 
        If Not txtAddress.Text = "" Then
             btnSave.Enabled = True
        End If

 
Use One of these method to solve ur problem.

Hi,
So u want the maskedtextbox to be disabled from filling...
I assume that u hv items Product Size and Cost but ur maskedtextbox should be enable only both Combo box Items are selected i.e. When u select Products size from Products combo box and cost from Cost combo box
 
I assume that ur first combo box is & Product Size and second one is Cost
 
(Assuming that first combo box name is cboProductsize & second one is cbocost & maskedtextbox name is mtxtValue)
 
(1) First change maskedtextbox Enable property to False
 
(2) Now place the following code on the Lost Focus Event of Cost combo box if u want ur maskedtextbox should be enabled only when both of these combo boxes (i.e. cboProductsize and cboCost) will be selected otherwise it will be disabled.
 

Private Sub cbocost_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles cbocost.LostFocus
If Not (cboProductsize.Text = cboProductsize.SelectedText) And Not (cbocost.Text = cbocost.SelectedText) Then
mtxtValue.Enabled = True
End If
End Sub
 

OR
 
(2) But if ur first combo box is Cost and second one is Product Size than same code will be placed on the Lost Focus Event of Product Size combo box...
 

i.e.
 
Private Sub cboProductsize_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles cboProductsize.LostFocus
If Not (cboProductsize.Text = cboProductsize.SelectedText) And Not (cbocost.Text = cbocost.SelectedText) Then
mtxtValue.Enabled = True
End If
End Sub
 

Hope this simple code solve ur problem..

You can try this simple solution:
Keep Save_button enable.
Inside button_Click Event:

If txt1.text="" or txt2.text="" or txt3.text="" then
 msgbox "Please fill all text boxes"
 exit sub ' return
end if
''Here the main execution starts.

In general, you do not want to disable a button just because the input data are not complete. Because the user would be lost when he/she gets nowhere to go. Or he/she would click other buttons if any exists.
 
The way to do the validation is to give the user choices of input, then when he/she click the button, the code does the validation and provide helpful massege.