Cannot change text of button on a control.
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Hello before selecting another event to let your code, make a breakpoint after bottun_click() line,run your control in dubug mode check if break point stop your program,therefore event has no problem,then check your condition state.
I added breakpoint on button1_click That event does get fired! And the other code that is in that event gets fired up correctly. The problem it that, that it doesn't change the text of button1. Here I have attached the source code as well: http://www.mediafire.com/?onhramkfh4zy6zx[^]
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The click event is not going to work for this. Click is fired after the button is pushed AND released. Similar code has to be called by the MouseDown, MouseUp, KeyDown and KeyUp handlers. The xDown events fire when the button is pushed down and the mouse or key is still being held down. The xUp events fire when the mouse or key is released.
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Dave KreskowiakButton1_click gets fired. But the text of button1 isn't changing... Here I have added the source code: http://www.mediafire.com/?onhramkfh4zy6zx[^] Can you please look into it?
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I put that code on a button_click event in a UserControl that I made. It is supposed to work as a boolean. eg if the value is 1 then it should change it to 0 else if the value is 0 it should change it to 1.
If you mean the Button1 handler should modify the Button1 text, then I see no problem, that works just fine. Mind you, you will see the results only after the Click handler has finished (unless you add a call to Refresh). So changing the text initially, performing a long operation, then changing the text back to its original, all in the one Click handler, will not show any change at all. But then, you shouldn't be doing long operations inside a handler on the GUI thread to begin with... Threads (and BackgroundWorkers) were invented to decouple long operations from the GUI thread. :)
Luc Pattyn [My Articles] Nil Volentibus Arduum
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If you mean the Button1 handler should modify the Button1 text, then I see no problem, that works just fine. Mind you, you will see the results only after the Click handler has finished (unless you add a call to Refresh). So changing the text initially, performing a long operation, then changing the text back to its original, all in the one Click handler, will not show any change at all. But then, you shouldn't be doing long operations inside a handler on the GUI thread to begin with... Threads (and BackgroundWorkers) were invented to decouple long operations from the GUI thread. :)
Luc Pattyn [My Articles] Nil Volentibus Arduum
I did add refresh() at the end... but that didn't work :(
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I did add refresh() at the end... but that didn't work :(
Then you are doing something wrong. Maybe you have more than one Button1 in your project, and you're talking to the wrong one (it helps to use meaningful names). Maybe its initial text isn't neither "0" nor "1". Maybe ... You will need to provide a more comprehensive description of what you have if you want to get more effective help around here. :)
Luc Pattyn [My Articles] Nil Volentibus Arduum
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Then you are doing something wrong. Maybe you have more than one Button1 in your project, and you're talking to the wrong one (it helps to use meaningful names). Maybe its initial text isn't neither "0" nor "1". Maybe ... You will need to provide a more comprehensive description of what you have if you want to get more effective help around here. :)
Luc Pattyn [My Articles] Nil Volentibus Arduum
I actually uploaded the entire source code of the application over here: http://www.mediafire.com/?onhramkfh4zy6zx[^] I think I am doing everything right... can you please check what I am doing wrong?
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I actually uploaded the entire source code of the application over here: http://www.mediafire.com/?onhramkfh4zy6zx[^] I think I am doing everything right... can you please check what I am doing wrong?
Sorry, I am not going to download, unpack, and investigate a bunch of code, and neither would anyone else around here. If you want effective help, put some effort in describing the problem properly and provide the relevant pieces of code (inside your message, and using PRE tags), not just all of it. :)
Luc Pattyn [My Articles] Nil Volentibus Arduum
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Sorry, I am not going to download, unpack, and investigate a bunch of code, and neither would anyone else around here. If you want effective help, put some effort in describing the problem properly and provide the relevant pieces of code (inside your message, and using PRE tags), not just all of it. :)
Luc Pattyn [My Articles] Nil Volentibus Arduum
Alright. So here is the exact issue with all the pictures and everything. I have a Form which has a FlowLayoutPanel, which has a UserControl on it. That Usercontrol has a Button on it. The initial text of that Button is "0" But I want to change that to "1" if it is a "0" and change it back to "0" if it is a "1" So this is the code I used on the UserControl which has the Button on it:
Public Class UserControl1
Private Sub Button1\_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If Button1.Text = "0" Then Button1.Text = "1" ElseIf Button1.Text = "1" Then Button1.Text = "0" End If End SubEnd Class
But when I click on Button1, the event does get fired but the text of the Button1, that is on the UserControl which is drawn on FlowLayoutPanel doesn't get changed.
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Alright. So here is the exact issue with all the pictures and everything. I have a Form which has a FlowLayoutPanel, which has a UserControl on it. That Usercontrol has a Button on it. The initial text of that Button is "0" But I want to change that to "1" if it is a "0" and change it back to "0" if it is a "1" So this is the code I used on the UserControl which has the Button on it:
Public Class UserControl1
Private Sub Button1\_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If Button1.Text = "0" Then Button1.Text = "1" ElseIf Button1.Text = "1" Then Button1.Text = "0" End If End SubEnd Class
But when I click on Button1, the event does get fired but the text of the Button1, that is on the UserControl which is drawn on FlowLayoutPanel doesn't get changed.
First, you don't need ElseIf in this case. It should just be:
If Button1.Text = "0" Then Button1.Text = "1" Else Button1.Text = "0" End IfSecond, Button1 is a horrible name for a button. Change it to something meaningful, like "OkButton", so you know without thinking which button it's referring to on your form.
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Dave Kreskowiak -
Alright. So here is the exact issue with all the pictures and everything. I have a Form which has a FlowLayoutPanel, which has a UserControl on it. That Usercontrol has a Button on it. The initial text of that Button is "0" But I want to change that to "1" if it is a "0" and change it back to "0" if it is a "1" So this is the code I used on the UserControl which has the Button on it:
Public Class UserControl1
Private Sub Button1\_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If Button1.Text = "0" Then Button1.Text = "1" ElseIf Button1.Text = "1" Then Button1.Text = "0" End If End SubEnd Class
But when I click on Button1, the event does get fired but the text of the Button1, that is on the UserControl which is drawn on FlowLayoutPanel doesn't get changed.
Dear ammar ahmad there was no user control name usercontrol1 in your solution. I saw your coding,you are more expert than me. I didnt run your program at all. Would you please tell me what this code is for?
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Alright. So here is the exact issue with all the pictures and everything. I have a Form which has a FlowLayoutPanel, which has a UserControl on it. That Usercontrol has a Button on it. The initial text of that Button is "0" But I want to change that to "1" if it is a "0" and change it back to "0" if it is a "1" So this is the code I used on the UserControl which has the Button on it:
Public Class UserControl1
Private Sub Button1\_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If Button1.Text = "0" Then Button1.Text = "1" ElseIf Button1.Text = "1" Then Button1.Text = "0" End If End SubEnd Class
But when I click on Button1, the event does get fired but the text of the Button1, that is on the UserControl which is drawn on FlowLayoutPanel doesn't get changed.
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First, you don't need ElseIf in this case. It should just be:
If Button1.Text = "0" Then Button1.Text = "1" Else Button1.Text = "0" End IfSecond, Button1 is a horrible name for a button. Change it to something meaningful, like "OkButton", so you know without thinking which button it's referring to on your form.
A guide to posting questions on CodeProject[^]
Dave KreskowiakStill doesn't work.
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Dear ammar ahmad there was no user control name usercontrol1 in your solution. I saw your coding,you are more expert than me. I didnt run your program at all. Would you please tell me what this code is for?
It is there... it should be under Form1. This is Twitter client that I am working on.
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Try changing the sub to:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If Button1.Text = "0" Then
Button1.Text = "1"
Else
Button1.Text = "0"
End If
End Subnope. not working.
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Still doesn't work.
I have no idea what you're doing wrong because this works fine. I wiped up this little example in about a minute:
Private Sub TestButton\_MouseDown(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles TestButton.MouseDown ChangeButtonText(TestButton) End Sub Private Sub TestButton\_MouseUp(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles TestButton.MouseUp ChangeButtonText(TestButton) End Sub Private Sub ChangeButtonText(ByRef target As Button) If target.Text = "0" Then target.Text = "1" Else target.Text = "0" End If End SubIf you want the button to change text like a toggle, just remove the MouseUp handler. Truthfully, I'd be creating my own button control to wrap this functionality and overriding the OnMouseDown and OnMouseUp methods to do this. I wouldn't be doing it using event handlers. But, since this method is easier to understand, here you go...
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Dave Kreskowiak -
I have no idea what you're doing wrong because this works fine. I wiped up this little example in about a minute:
Private Sub TestButton\_MouseDown(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles TestButton.MouseDown ChangeButtonText(TestButton) End Sub Private Sub TestButton\_MouseUp(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles TestButton.MouseUp ChangeButtonText(TestButton) End Sub Private Sub ChangeButtonText(ByRef target As Button) If target.Text = "0" Then target.Text = "1" Else target.Text = "0" End If End SubIf you want the button to change text like a toggle, just remove the MouseUp handler. Truthfully, I'd be creating my own button control to wrap this functionality and overriding the OnMouseDown and OnMouseUp methods to do this. I wouldn't be doing it using event handlers. But, since this method is easier to understand, here you go...
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Dave KreskowiakThat worked beautifully :D BIG THANKS M8!
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I made a control which has a button on it. But I need to change the text of it when it is clicked. this is what I have tried but it didn't work:
If Button1.Text = "1" then
Button1.Text = "0"
Elseif Button1.Text = "0" then
Button1.Text = "1"
End ifOke i know this sounds a bit basic but have you checked for spaces? strings are quite picky with those. "0 " is not the same as "0" for them. tough its likely a human will read over that last space. you could add a replace to the .text to get rid of this problem.
If Button1.Text.Replace(" ","") = "1" then
Button1.Text = "0"
Elseif Button1.Text.Replace(" ","") = "0" then
Button1.Text = "1"
End ifEDIT: oke reading some more and i hear some rumors that your using several threads. if this thing is executed in a thread you might want to enforce the update to your gui.
Private Sub updateUI() If Me.InvokeRequired Then Me.Invoke(New MethodInvoker(AddressOf updateUI)) Else Me.Update() End If End Subif your using that button thing in a sub/background thread then add the above sub and try calling it after the button event is done. be aware that this isn't good code and will enforce a full refresh of your screen, its a nice way to test tough.
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Oke i know this sounds a bit basic but have you checked for spaces? strings are quite picky with those. "0 " is not the same as "0" for them. tough its likely a human will read over that last space. you could add a replace to the .text to get rid of this problem.
If Button1.Text.Replace(" ","") = "1" then
Button1.Text = "0"
Elseif Button1.Text.Replace(" ","") = "0" then
Button1.Text = "1"
End ifEDIT: oke reading some more and i hear some rumors that your using several threads. if this thing is executed in a thread you might want to enforce the update to your gui.
Private Sub updateUI() If Me.InvokeRequired Then Me.Invoke(New MethodInvoker(AddressOf updateUI)) Else Me.Update() End If End Subif your using that button thing in a sub/background thread then add the above sub and try calling it after the button event is done. be aware that this isn't good code and will enforce a full refresh of your screen, its a nice way to test tough.
Thanks Nick. But the issue has already been resolved :)