Visual Basic

Re: clear datagrid in vb.net

2-Mar-09 20:57

not the object...
I just want to clear the datagrid on a button click...the scope of the object is not even there in the button....Its just a button iwth a caption "clear datagrid". Doesnot concern with any object

Thanks

I am a learner Always

0x3c03-Mar-09 5:46

0x3c0

3-Mar-09 5:46

In which case, you simply need to set the DataSource to Nothing; alternatively you could simply use DataGrid.Clear(). By the term 'object' I mean the database or data source which the DataGrid is bound to. Sorry if I caused any confusion. Incidentally, you could have found your answer from

Re: clear datagrid in vb.net

Tej Aj3-Mar-09 7:17

Tej Aj

3-Mar-09 7:17

In order to Clear a DataGrid control having a DataSource property set to some Object, you only need to write DataGrid1.DataSource = Nothing
this will clear the grid automatically.
Tell me whether this solution works or not.

How to use timesetevenet() in vb.net 2005?

Jackeygou2-Mar-09 18:34

Jackeygou

2-Mar-09 18:34

I write some code as follow:

Module mdlTimerEvent_Drive
Private Declare Function timeSetEvent Lib "winmm.dll" (ByVal interval_Ms As Integer, ByVal resolution_Ms As Integer, _
ByVal lpFunction As [Delegate], ByVal dwUser As Integer, ByVal uFlags As Integer) As Integer
Private Declare Function timeKillEvent Lib "winmm.dll" (ByVal uID As Long) As Long

Private Delegate Sub timeCallback(ByVal uID As Integer, ByVal uMsg As Integer, ByVal dwUser As Integer, _
ByVal dw1 As Integer, ByVal dw2 As Integer)

Private Const elapse_Periodically As Integer = 1
Public m_nInterruptTime As Long

Private Sub TimeProc(ByVal uID As Integer, ByVal uMsg As Integer, ByVal dwUser As Integer, _
ByVal dw1 As Integer, ByVal dw2 As Integer)
m_lngNewCount = m_lngNewCount + 1
End Sub

Public Sub StartTimer()
Dim tmrProc As timeCallback = AddressOf TimeProc
m_lngNewCount = 0
m_lngTimerID = timeSetEvent(m_nInterruptTime, 1, tmrProc, vbNullString, elapse_Periodically)
End Sub

Public Sub StopTimer()
If m_lngTimerID > 0 Then
lngResult = timeKillEvent(m_lngTimerID)
End If
End Sub
End Module

I call mdlTimerEvent_Drive.StartTimer() and it run, but Vs.net show MDA exception "callbackOnCollectedDelegate" after seconds.
What shall I do? Confused | :confused:

Flying kingdom

Re: How to use timesetevenet() in vb.net 2005?

Christian Graus2-Mar-09 19:47

monitor resolution problem

2-Mar-09 19:47

Why do you need to use this instead of the built in timers ?

Christian Graus

Driven to the arms of OSX by Vista.

hrishiS2-Mar-09 17:14

2-Mar-09 17:14

Hello to everyone,

I am facing the following problem with Vb.Net2005 project for different resolution monitor.
Initially I was doing my VB.net project using a 17 inch monitor. Now when I shifted my project to a flat LCD monitor with different resolution, my ALL CONTROLS POSITION ARE NOT LIKE BEFORE......In future I may have to shift my project to different monitor again. Moreover for deploying the project also, I don't know the resolution of clients monitor in advance....

Could anyone please give me solution for this.

Thanks in advance

I am a learner Always

Christian Graus2-Mar-09 17:38

2-Mar-09 17:38

Best bet is to buy a good VB.NET book. Read it. Look up 'dock' and 'anchor' in the index for how to lay out your controls so they resize for the form.

Christian Graus

Driven to the arms of OSX by Vista.

hrishiS2-Mar-09 17:55

2-Mar-09 17:55

HI Christian,
Thanks for your reply...
I have at least 500 controls all over the project. Is there any way to do the same together or something like that..

Thanks

I am a learner Always

Christian Graus2-Mar-09 18:34

2-Mar-09 18:34

No, of course not. What magical way would there be to do that, unless you just want them all to sit on the top left of the form. Buy that book, and next time, set these things as you work on the project.

Christian Graus

Driven to the arms of OSX by Vista.

praveenkumar palla2-Mar-09 17:55

praveenkumar palla

2-Mar-09 17:55

Set the Anchor property for each control according to your design

Your controls will be placed according to the resolution

hrishiS2-Mar-09 19:35

2-Mar-09 19:35

thanks praveen.....

So can I just select all controls on the form and set the anchor?

I am a learner Always

Dave Kreskowiak3-Mar-09 7:10

Dave Kreskowiak

3-Mar-09 7:10

No, you can't. The controls are already anchored, by default, to the top left corner of the form. Changing the anchor for all of the controls all at once will only cause you extreme grief. Really, anchoring and layouts should have been done eariler in the apps development. It sounds like you're missing proper anchoring and proper use of flow and table layout panel controls.

The bottom line is that there is no easy way around your problem. Fixing this is going to take a lot of work that you simply cannot automate or do in a day or two.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

hrishiS3-Mar-09 17:19

3-Mar-09 17:19

thanks Dave,
I think I will have to stick to not anchoring anything....no other go

I am a beginner

vb.net

ma.... mitesh patel2-Mar-09 14:50

ma.... mitesh patel

2-Mar-09 14:50

hi there,

i have one groupbox in that groupbox i have 4 buttons and 2textbox,2 lebels etc....
if i click on buttton 4 than this same groupbox should be come next to this one,,, plz help me

if u dont mind can u send me email
my email id is mitesh_patel98@yahoo.com

Re: vb.net

EliottA2-Mar-09 16:12

EliottA

2-Mar-09 16:12

tool.

Check out the CodeProject forum Guidelines[^]

Re: vb.net

Christian Graus2-Mar-09 17:36