Tread Abort Without Message - Visual Basic .NET

Li Pang

Hi,

I have two buttons, one is to start a process, another is to cancel the
process. Wehn I canceled a process, there is an alert message popped up. I'd
like to know how to avoid this popup.

thanks in advance

Private Shared tdSearch As Thread

Private Sub btnSearchNow_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles btnSearchNow.Click
tdSearch = New Thread(AddressOf MyProcess)
tdSearch.IsBackground = True
tdSearch.Start()
End Sub

Private Sub btnStopSearch_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles btnStopSearch.Click
tdSearch.Abort()
End Sub

Nov 21 '05 #1

Subscribe Post Reply

1218

Herfried K. Wagner [MVP]

"Li Pang" <Li****@discussions.microsoft.com> schrieb:

I have two buttons, one is to start a process, another is to cancel the
process. Wehn I canceled a process, there is an alert message popped up.
I'd
like to know how to avoid this popup.

<URL:http://www.google.de/groups?threadm=OWoxa8lxEHA.2192%40TK2MSFTNGP14.phx .gbl>

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>

Nov 21 '05 #2

Herfried K. Wagner [MVP]

"Li Pang" <Li****@discussions.microsoft.com> schrieb:

I have two buttons, one is to start a process, another is to cancel the
process. Wehn I canceled a process, there is an alert message popped up.
I'd
like to know how to avoid this popup.

<URL:http://www.google.de/groups?threadm=OWoxa8lxEHA.2192%40TK2MSFTNGP14.phx .gbl>

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>

Nov 21 '05 #3

Li Pang

Hi Herfried K. Wagner ,

I couldn't figure out my problem from below web site, please provide me more
details. Thanks.

"Herfried K. Wagner [MVP]" wrote:

"Li Pang" <Li****@discussions.microsoft.com> schrieb:
I have two buttons, one is to start a process, another is to cancel the
process. Wehn I canceled a process, there is an alert message popped up.
I'd
like to know how to avoid this popup.

<URL:http://www.google.de/groups?threadm=OWoxa8lxEHA.2192%40TK2MSFTNGP14.phx .gbl>

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>

Nov 21 '05 #4

Cor Ligthert

Li,

I tried your code and did not get any message at all.
However why is that shared of the thread?
That I have deleted

\\\
Private tdSearch As Threading.Thread
Private Sub btnSearchNow_Click(ByVal sender As _
System.Object, ByVal e As System.EventArgs) _
Handles Button1.Click
tdSearch = New Threading.Thread(AddressOf myprocess)
tdSearch.IsBackground = True
tdSearch.Start()
End Sub
Private Sub btnStopSearch_Click(ByVal sender As _
System.Object, ByVal e As System.EventArgs) _
Handles Button2.Click
tdSearch.Abort()
Me.Close()
End Sub
Private Sub myprocess()
Threading.Thread.Sleep(40000)
End Sub
///

I hope this helps?

Cor

"Li Pang" <Li****@discussions.microsoft.com>

...

Hi,

I have two buttons, one is to start a process, another is to cancel the
process. Wehn I canceled a process, there is an alert message popped up.
I'd
like to know how to avoid this popup.

thanks in advance

Private Shared tdSearch As Thread

Private Sub btnSearchNow_Click(ByVal sender As System.Object, ByVal e
As
System.EventArgs) Handles btnSearchNow.Click
tdSearch = New Thread(AddressOf MyProcess)
tdSearch.IsBackground = True
tdSearch.Start()
End Sub

Private Sub btnStopSearch_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles btnStopSearch.Click
tdSearch.Abort()
End Sub

Nov 21 '05 #5

Li Pang

Hi Cor Ligthert,

Your codes made the same result, except it closed the form when I clicked on
"Stop". The message was "Thread was being aborted".

"Cor Ligthert" wrote:

Li,

I tried your code and did not get any message at all.
However why is that shared of the thread?
That I have deleted

\\\
Private tdSearch As Threading.Thread
Private Sub btnSearchNow_Click(ByVal sender As _
System.Object, ByVal e As System.EventArgs) _
Handles Button1.Click
tdSearch = New Threading.Thread(AddressOf myprocess)
tdSearch.IsBackground = True
tdSearch.Start()
End Sub
Private Sub btnStopSearch_Click(ByVal sender As _
System.Object, ByVal e As System.EventArgs) _
Handles Button2.Click
tdSearch.Abort()
Me.Close()
End Sub
Private Sub myprocess()
Threading.Thread.Sleep(40000)
End Sub
///

I hope this helps?

Cor

"Li Pang" <Li****@discussions.microsoft.com>

...
Hi,

I have two buttons, one is to start a process, another is to cancel the
process. Wehn I canceled a process, there is an alert message popped up.
I'd
like to know how to avoid this popup.

thanks in advance

Private Shared tdSearch As Thread

Private Sub btnSearchNow_Click(ByVal sender As System.Object, ByVal e
As
System.EventArgs) Handles btnSearchNow.Click
tdSearch = New Thread(AddressOf MyProcess)
tdSearch.IsBackground = True
tdSearch.Start()
End Sub

Private Sub btnStopSearch_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles btnStopSearch.Click
tdSearch.Abort()
End Sub

Nov 21 '05 #6

Cor Ligthert

Li,

Does my code when you tried it give the message "Thread was being aborted?
What do you mean by clicked on stop, there is no "Stop" in my code

Cor

"Li Pang"

Hi Cor Ligthert,

Your codes made the same result, except it closed the form when I clicked
on
"Stop". The message was "Thread was being aborted".

"Cor Ligthert" wrote:
Li,

I tried your code and did not get any message at all.
However why is that shared of the thread?
That I have deleted

\\\
Private tdSearch As Threading.Thread
Private Sub btnSearchNow_Click(ByVal sender As _
System.Object, ByVal e As System.EventArgs) _
Handles Button1.Click
tdSearch = New Threading.Thread(AddressOf myprocess)
tdSearch.IsBackground = True
tdSearch.Start()
End Sub
Private Sub btnStopSearch_Click(ByVal sender As _
System.Object, ByVal e As System.EventArgs) _
Handles Button2.Click
tdSearch.Abort()
Me.Close()
End Sub
Private Sub myprocess()
Threading.Thread.Sleep(40000)
End Sub
///

I hope this helps?

Cor

"Li Pang" <Li****@discussions.microsoft.com>

...
> Hi,
>
> I have two buttons, one is to start a process, another is to cancel the
> process. Wehn I canceled a process, there is an alert message popped
> up.
> I'd
> like to know how to avoid this popup.
>
> thanks in advance
>
> Private Shared tdSearch As Thread
>
> Private Sub btnSearchNow_Click(ByVal sender As System.Object, ByVal
> e
> As
> System.EventArgs) Handles btnSearchNow.Click
> tdSearch = New Thread(AddressOf MyProcess)
> tdSearch.IsBackground = True
> tdSearch.Start()
> End Sub
>
> Private Sub btnStopSearch_Click(ByVal sender As System.Object, ByVal e
> As
> System.EventArgs) Handles btnStopSearch.Click
> tdSearch.Abort()
> End Sub

Nov 21 '05 #7

Li Pang

Hi Cor,
I mean "btnStopSearch" button. The message came anyway.

"Cor Ligthert" wrote:

Li,

Does my code when you tried it give the message "Thread was being aborted?
What do you mean by clicked on stop, there is no "Stop" in my code

Cor

"Li Pang"
Hi Cor Ligthert,

Your codes made the same result, except it closed the form when I clicked
on
"Stop". The message was "Thread was being aborted".

"Cor Ligthert" wrote:
Li,

I tried your code and did not get any message at all.
However why is that shared of the thread?
That I have deleted

\\\
Private tdSearch As Threading.Thread
Private Sub btnSearchNow_Click(ByVal sender As _
System.Object, ByVal e As System.EventArgs) _
Handles Button1.Click
tdSearch = New Threading.Thread(AddressOf myprocess)
tdSearch.IsBackground = True
tdSearch.Start()
End Sub
Private Sub btnStopSearch_Click(ByVal sender As _
System.Object, ByVal e As System.EventArgs) _
Handles Button2.Click
tdSearch.Abort()
Me.Close()
End Sub
Private Sub myprocess()
Threading.Thread.Sleep(40000)
End Sub
///

I hope this helps?

Cor

"Li Pang" <Li****@discussions.microsoft.com>

...
> Hi,
>
> I have two buttons, one is to start a process, another is to cancel the
> process. Wehn I canceled a process, there is an alert message popped
> up.
> I'd
> like to know how to avoid this popup.
>
> thanks in advance
>
> Private Shared tdSearch As Thread
>
> Private Sub btnSearchNow_Click(ByVal sender As System.Object, ByVal
> e
> As
> System.EventArgs) Handles btnSearchNow.Click
> tdSearch = New Thread(AddressOf MyProcess)
> tdSearch.IsBackground = True
> tdSearch.Start()
> End Sub
>
> Private Sub btnStopSearch_Click(ByVal sender As System.Object, ByVal e
> As
> System.EventArgs) Handles btnStopSearch.Click
> tdSearch.Abort()
> End Sub

Nov 21 '05 #8

Cor Ligthert

Li,

There is no btnStopSearch in my sample

Cor

"Li Pang" <Li****@discussions.microsoft.com>

Hi Cor,
I mean "btnStopSearch" button. The message came anyway.

"Cor Ligthert" wrote:
Li,

Does my code when you tried it give the message "Thread was being
aborted?
What do you mean by clicked on stop, there is no "Stop" in my code

Cor

"Li Pang"
> Hi Cor Ligthert,
>
> Your codes made the same result, except it closed the form when I
> clicked
> on
> "Stop". The message was "Thread was being aborted".
>
> "Cor Ligthert" wrote:
>
>> Li,
>>
>> I tried your code and did not get any message at all.
>> However why is that shared of the thread?
>> That I have deleted
>>
>> \\\
>> Private tdSearch As Threading.Thread
>> Private Sub btnSearchNow_Click(ByVal sender As _
>> System.Object, ByVal e As System.EventArgs) _
>> Handles Button1.Click
>> tdSearch = New Threading.Thread(AddressOf myprocess)
>> tdSearch.IsBackground = True
>> tdSearch.Start()
>> End Sub
>> Private Sub btnStopSearch_Click(ByVal sender As _
>> System.Object, ByVal e As System.EventArgs) _
>> Handles Button2.Click
>> tdSearch.Abort()
>> Me.Close()
>> End Sub
>> Private Sub myprocess()
>> Threading.Thread.Sleep(40000)
>> End Sub
>> ///
>>
>> I hope this helps?
>>
>> Cor
>>
>> "Li Pang" <Li****@discussions.microsoft.com>
>>
>> ...
>> > Hi,
>> >
>> > I have two buttons, one is to start a process, another is to cancel
>> > the
>> > process. Wehn I canceled a process, there is an alert message popped
>> > up.
>> > I'd
>> > like to know how to avoid this popup.
>> >
>> > thanks in advance
>> >
>> > Private Shared tdSearch As Thread
>> >
>> > Private Sub btnSearchNow_Click(ByVal sender As System.Object,
>> > ByVal
>> > e
>> > As
>> > System.EventArgs) Handles btnSearchNow.Click
>> > tdSearch = New Thread(AddressOf MyProcess)
>> > tdSearch.IsBackground = True
>> > tdSearch.Start()
>> > End Sub
>> >
>> > Private Sub btnStopSearch_Click(ByVal sender As System.Object, ByVal
>> > e
>> > As
>> > System.EventArgs) Handles btnStopSearch.Click
>> > tdSearch.Abort()
>> > End Sub
>>
>>
>>

Nov 21 '05 #9

Li Pang

Cor,

Your code is correct. My issue is due to using catch ex as exception to
catch the error in myprocess. When the thread is aborted, the exception
popped up. That was my fault.

Thanks for your effort.

"Cor Ligthert" wrote:

Li,

There is no btnStopSearch in my sample

Cor

"Li Pang" <Li****@discussions.microsoft.com>
Hi Cor,
I mean "btnStopSearch" button. The message came anyway.

"Cor Ligthert" wrote:
Li,

Does my code when you tried it give the message "Thread was being
aborted?
What do you mean by clicked on stop, there is no "Stop" in my code

Cor

"Li Pang"

> Hi Cor Ligthert,
>
> Your codes made the same result, except it closed the form when I
> clicked
> on
> "Stop". The message was "Thread was being aborted".
>
> "Cor Ligthert" wrote:
>
>> Li,
>>
>> I tried your code and did not get any message at all.
>> However why is that shared of the thread?
>> That I have deleted
>>
>> \\\
>> Private tdSearch As Threading.Thread
>> Private Sub btnSearchNow_Click(ByVal sender As _
>> System.Object, ByVal e As System.EventArgs) _
>> Handles Button1.Click
>> tdSearch = New Threading.Thread(AddressOf myprocess)
>> tdSearch.IsBackground = True
>> tdSearch.Start()
>> End Sub
>> Private Sub btnStopSearch_Click(ByVal sender As _
>> System.Object, ByVal e As System.EventArgs) _
>> Handles Button2.Click
>> tdSearch.Abort()
>> Me.Close()
>> End Sub
>> Private Sub myprocess()
>> Threading.Thread.Sleep(40000)
>> End Sub
>> ///
>>
>> I hope this helps?
>>
>> Cor
>>
>> "Li Pang" <Li****@discussions.microsoft.com>
>>
>> ...
>> > Hi,
>> >
>> > I have two buttons, one is to start a process, another is to cancel
>> > the
>> > process. Wehn I canceled a process, there is an alert message popped
>> > up.
>> > I'd
>> > like to know how to avoid this popup.
>> >
>> > thanks in advance
>> >
>> > Private Shared tdSearch As Thread
>> >
>> > Private Sub btnSearchNow_Click(ByVal sender As System.Object,
>> > ByVal
>> > e
>> > As
>> > System.EventArgs) Handles btnSearchNow.Click
>> > tdSearch = New Thread(AddressOf MyProcess)
>> > tdSearch.IsBackground = True
>> > tdSearch.Start()
>> > End Sub
>> >
>> > Private Sub btnStopSearch_Click(ByVal sender As System.Object, ByVal
>> > e
>> > As
>> > System.EventArgs) Handles btnStopSearch.Click
>> > tdSearch.Abort()
>> > End Sub
>>
>>
>>

Nov 21 '05 #10

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