I program in Visual Studio 2013 C#.
I want to have a functionality to disable for short time a button.
I tried button.Enabled=false, but I see that when I click it during it is disabled then the click action starts right after I get that button enabled in other place of the program.
How to clear that event or block them when button is disabled?
Best regards,
Krzysztof
for disable button click.
button1.Click -= button1_Click; // here button1_Click is your event name
for enable button click.
button1.Click += button1_Click; // here button1_Click is your event name
This is the extremely simple way that I found on the internet and it works.
Disable the button(s)
Run whatever is needed to be performed on the procedure
Run this command Application.DoEvent();. This command enqueues all the click events (as many as the user clicked) and ignore/dispose them
Enable the button(s) at the end
Good Luck
Can't you just check for button's state before executing commands in the method?
For example:
void Click(object sender, EventArgs e)
{
if(!(sender as Button).Enabled)
return;
//other statements
}
Try
YourButton.Attributes.Add("onClick", "");
To remove its onClick altogether.
and then
YourButton.Attributes.Add("onClick", "YourButton_Click");
To add it again.
But your program shouldn't execute the Click when you say it does. It's likely there's something wrong in your code's logic.
Look at this code below, after click button2, button 1 is disabled. while button 1 is disabled, click button 1. After button 1 enable automatically after 5 seconds textBox1 update to "Update".
private void button1_Click(object sender, EventArgs e)
{
textBox1.Text = "Update";
}
private void button2_Click(object sender, EventArgs e)
{
button1.Enabled = false;
Thread.Sleep(5000);
button1.Enabled = true;
}
private void button3_Click(object sender, EventArgs e)
{
textBox1.Text = "";
}
btn.Visibility = Visibility.Collapsed;
You can try this.
ALL WRONG!
"button1_Click" is not the standard handler behind a button, so it cannot be removed. That is your own function.
YourButton.Attributes does not exist at all.
Nobody even mentioned "Web Forms".
Your description does not match the Windows Forms Button behavior.
The solution for the question you really asked is:
Use a usual Windows Forms Button or override the click event to check again if the button is enabled.
Related
I am trying to close the app by clicking one button but it's not working.
this is my code.
private void buttonclose_Click(object sender, EventArgs e)
{
Application.Exit();
}
Like #Dialecticus said, it could be that you never registered the event handler. In your form designer, when you double click the button it will register the click event for you automatically. If you didn't do that and your code was just copy/pasted you would have to go into the events to "wire" them yourself.
If that's not your issue, you could try using Environment.Exit() or this.Close() instead.
Use this Code, it will diffidently work
private void btnExit_Click(object sender, EventArgs e)
{
this.Close();
}
I have a class which I inherit from Button. In this class, I create labels which I can use as custom button captions. The problem I have on these custom buttons is when I click the label nothing happens, and if I click outside the label but still on the button it works as usual. To solve this I wrote:
lblTitle.Click += new EventHandler(LabelClick);
And in LabelClick I wrote:
private void LabelClick(object sender, EventArgs e)
{
base.OnClick(e);
}
This worked good, but then I noticed that I didnt get the clickanimation of the click, when I clicked on the label. So I made the same thing with onMouseDown and Up.
lblTitle.MouseDown += new MouseEventHandler(LabelMouseDown);
lblTitle.MouseUp += new MouseEventHandler(LabelMouseUp);
private void LabelMouseDown(object sender, MouseEventArgs e)
{
base.OnMouseDown(e);
}
private void LabelMouseUp(object sender, MouseEventArgs e)
{
base.OnMouseUp(e);
}
But then I sometimes get the effect of clicking two times on the button. So now I'm wondering, how do I give the user the same click animation when clicked on the button and the label ontop of the button - without making the button click twice?
Thanks in advance and if you gonna downgrade this question, please leave a comment on why!
I think that the problem is that LabelClick & LabelMouseDown & LabelMouseUp all these three events are fired when you click the label which fires them in the base button. so your click event is duplicated when you make a MouseDown event. (this should be a comment, but i dont have enough reputation to leave a comment, hope it will help :) )
I have a simple C # application that contains buttons and a web browser, each button execute a request and displays the result of the request on the web browser. And I use the results of a request in the next button.
private void button1_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("http://www.test.com");
}
private void button2_Click(object sender, EventArgs e)
{
if (webBrowser1.Document.GetElementById("tesxtbox1") != null)
{
HtmlElement txt1 = webBrowser1.Document.GetElementById("tesxtbox1");
txt1.SetAttribute("value", "test");
webBrowser1.Document.Forms[0].InvokeMember("submit");
}
}
my question is to find method or way to perform the two buttons with a single click, but the second button, do not execute until the web browser is loaded.
in my first solution, I added in the first button :
webBrowser1.DocumentCompleted + = new WebBrowserDocumentCompletedEventHandler (Button2_Click);
but the second button excuted several times, so I added in the last line of the button 2:
webBrowser1.DocumentCompleted - = new WebBrowserDocumentCompletedEventHandler (Button2_Click);
it works, but in the console I find that Button 2 is execute twice
Thanks in advance!
You're approaching this issue the wrong way. First you are not looking for a way to click two buttons. You are looking for a way to click one button and execute an operation if a condition is met.
Basically you just need to call button2.PerformClick() in your WebBrowser DocumentCompleted method. If however you want to ensure that button1 was clicked, you can set a bool in button1 Click method and reset it in the button2 Click method.
If you need to perform more than one button click in your document complete method after the first button click, you can add them to your DocumentCompleted method like this:
First subscribe normally.
webBrowser1.DocumentCompleted += Document_Completed;
Normally you can generate the method stub by pressing TAB after subscribing to the event. The method could be as follows:
private void Document_Completed(object sender, WebBrowserDocumentCompletedEventArgs e)
{
//here you add the other buttons that must be clicked when document complete
button1.PerformClick(); button2.PerformClick();//etc
//you could even iterate all over the buttons on the form and click each of them if it meets a certain condtition.
}
I hope that answers your question :)
DocumentCompleted is executed each time your WebBrowser control finishes downloading a document.
You only need to subscribe once.
My small windows form application has two radio buttons, and initially neither is checked. Until one of them is checked, the "Go" button should be disabled.
I found a very simple way to obtain this, but I'm not sure if I'm setting myself up for a random crash.
I added a timer component, enabled it, and in the Tick event:
private void timer1_Tick(object sender, EventArgs e)
{
bool canGo = (_usRadioButton.Checked || _intlRadioButton.Checked);
if (_goButton.Enabled != canGo)
{
_goButton.Enabled = canGo;
}
}
I know there are other ways to do this, I'm just curious if this way is valid or if I'm going to have an end user throwing exceptions when the timer is firing at the same time the form is updating the Checked property on one of the checkboxes?
If I understood you correctly, you already know about the CheckedChanged event, and are only asking about conflicts in your code. So:
As far as I know it's not multithreading, and there's no danger. The Tick event will actually not fire at the same time the computer is updating the Checked state.
If you place traces in Form.Load and Timer.Tick:
private void Form_Load(object sender, EventArgs e)
{
Console.WriteLine("Form_Load/Thread.CurrentThread.ManagedThreadId=" + Thread.CurrentThread.ManagedThreadId);
}
private void timer1_Tick(object sender, EventArgs e)
{
Console.WriteLine("timer1_Tick/Thread.CurrentThread.ManagedThreadId=" + Thread.CurrentThread.ManagedThreadId);
}
The results show:
Form_Load/Thread.CurrentThread.ManagedThreadId=9
timer1_Tick/Thread.CurrentThread.ManagedThreadId=9
A better solution is to subscribed to the CheckedChanged event of your radio buttons and then enable the "Go" button in that event handler.
This will solve any timing problems you will encounter with this approach.
I'm not certain that it's safer, but you could also subscribe to the CheckedChanged event and use that handler code to enable the Go button. This would save you a timer that would have to run indefinitely.
This is what I'm doing and it results in a stack overflow because it just switches back and forth forever.
private void radioButtonA_CheckedChanged(object sender, EventArgs e)
{
radioButtonB.Checked = !radioButtonB.Checked;
}
private void radioButtonB_CheckedChanged(object sender, EventArgs e)
{
radioButtonA.Checked = !radioButtonA.Checked;
}
There has to be a better way to do this...
try commenting out all of your code and see if it works the way you want.
you don't have to uncheck the other radio buttons in code
Is it toggling of "One" radio button what you were trying to do? If so, I tried this, and it works for me:
Set the Radio Button AutoCheck property to FALSE.
Create a "Click" event for the Radio Button.
In the Click Event Handler for the Radio Button paste the code:
radioButton.Checked = !radioButton.Checked;
I hope this helps.
You can disable the Event in the code before changing the Checked value, then add it again immediately afterwards.