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Changing Label Text at Runtime

I am going nuts trying to figure this out.

All I want to do is when I click a button on my form (which executes a SQL query), change a label text on my form to read "Please wait while the query executes..."

I have:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.Button1.Text = "Please wait while the query executes..."

(Do SQL Stuff)
End Sub

The label is not changing. I have tried to remove the default label text (which I would then set at Form Load) and this doesn't help.

Why do basic things need to be so hard sometimes???

iboutchkine

Works fine on my pc
Me.Button1.Text = "Please wait while the query executes..."

After I click the button the Button text changes. Do you get any error?

ASKER CERTIFIED SOLUTION

UncleMidriff

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ABaruh

ASKER

No....nothing happens

If I take out my SQL query it works fine. Why is it not doing anything while processing the SQL query? I am changing the label before the SQL

Mike Tomlinson

Well, you are changing the Buttons text, not a Labels text. Have your tried using the Label name in your code instead of the Button name?

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Me.Label1.Text = "Please wait while the query executes..."

(Do SQL Stuff)
End Sub

ABaruh

ASKER

Idle_Mind, good catch, I just typed that wrong in the example though

Mike Tomlinson

You can force a refresh before jumping into the SQL code like this:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Label1.Text = "Please wait while the query executes..."
Label1.Refresh()
Application.DoEvents()

' (Do SQL Stuff)
End Sub

ABaruh

ASKER

Idle_Mind, I had already accepted Uncle's comment about the Refresh, thanks to everyone though.

UncleMidriff

Thanks Aburah.

Idle_Mind: Is the DoEvents necessary? I just made a little test program for this program without the DoEvents and it worked, but now I am all curious as to what situations need a DoEvents.

Mike Tomlinson

It really depends on what else is going on in the application.

If you have other threads already running in the application then the Refesh() may get stuck in the message queue until those threads yield the processor or finish.

The DoEvents call forces the app to process any messages in it's queue. Adding it in ensures the the Refesh() message will be processed NOW. =)

If you don't have anything else going on in the app then it probably doesn't make a difference.

~IM

UncleMidriff

Ahhh...ok, that makes sense. Thanks.