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datagridview and key press events issue

Posted on 2010-08-17
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Last Modified: 2012-06-27
Hi,

I have a datagridview in which i have several columns and each column has different datatypes like dates, address, phone numbers.
So, to prevent the user from entering a unwanted data in the fields we are using key press events.
For the phone field i am calling this event.

  Private Sub dgvSchedules_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles dgvSchedules.EditingControlShowing
        Dim strColumnHeader As String
        strColumnHeader = dgvSchedules.Columns(dgvSchedules.CurrentCell.ColumnIndex).HeaderText

        If (strColumnHeader = "Start_Phone" AND  Not e.Control Is Nothing Then
      AddHandler tb.KeyPress, AddressOf cls_Global.NumericText_KeyPress
      end if
   End sub

This part is working good. But when i move out of this cell and enter into the next cell which is a address field, it is not allowing me to enter alphabets. I can only enter numbers.

Why is this happening? How can i prevent this?
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Question by:rowternet
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5 Comments
 
LVL 18

Expert Comment

by:John (Yiannis) Toutountzoglou
ID: 33457894
Try something like this

Private withEvents thiscontrol as textbox


'editingcontrol showing event'


if Mydatagridview.curentCell.COlumnIndex="YourcolumnIndex" then 
     ThisControl=Ctype(e.Control,Textbox)
   Else 
   ThisCOntrol=Nothing

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0
 
LVL 18

Expert Comment

by:John (Yiannis) Toutountzoglou
ID: 33457915
Ok then you can handle the ThisControl_KeyPress Event ...
ThisControl=Nothing is very Important ....
So ...You Are Declaring in which Column You need a key Press Event and after leaving this Cell ThisCOntrol Goes to Nothing
0
 
LVL 17

Accepted Solution

by:
Zhaolai earned 250 total points
ID: 33458303
Add RemoveHandler in the Else section.



0
 
LVL 18

Assisted Solution

by:John (Yiannis) Toutountzoglou
John (Yiannis) Toutountzoglou earned 250 total points
ID: 33460688
Complete Code
Private WithEvents thiscontrol As TextBox 

Private Sub dgvSchedules_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles dgvSchedules.EditingControlShowing
      Try
            If dgvSchedules.CurrentCell.ColumnIndex = YourColumnIndex Then
                thiscontrol = CType(e.Control, TextBox)

            Else
                thiscontrol = Nothing
            End If
End Sub

Private Sub thiscontrol_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles thiscontrol.KeyPress
"YourMethod"
End Sub


'Or As I Comment Before ID:33457915 Remove the Event ..Of The CONTROL .In your Case'
 If (strColumnHeader = "Start_Phone" AND  Not e.Control Is Nothing Then
      AddHandler tb.KeyPress, AddressOf cls_Global.NumericText_KeyPress
   Else
      RemoveHandler tb.KeyPress, AddressOf cls_Global.NumericText_KeyPress
 End if
   End sub

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0
 

Author Closing Comment

by:rowternet
ID: 33470654
zhaolai and jtoutou.
Could not respond earlier.
Thanks. Adding  remove handler helped
0

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