I would like to hide a button after it was clicked but I don't know how.
C#
private async void btn1Clicked(object sender, EventArgs e)
{
if (condition)
{
// hide button
}
}
XAML
<Button Clicked="btn1Clicked"/>
If you want to make your button invisible you can do:
if (condition)
{
button.Visibility=ViewStates.Invisible;
}
else
{
button.Visibility=ViewStates.Visible;
}
Or you can use IsVisible property.
You can do the following
private async void btn1Clicked(object sender, EventArgs e)
{
Button btn = (Button)sender;
if(condition)
{
// hide the button
btn.IsVisible = false;
// or disable the button.
// As Caius Jard said, disappearing buttons sometimes cause confusion.
btn.IsEnabled = false;
}
}
Related
private void btnCodeAkas_Click(object sender, EventArgs e)
{
tmrTimerAkas.Start();
tmrTimerTwoAkas.Start();
}
But I need to target only one button if it was clicked how do I do that?
well you can cast your sender to Control object so you can get the name of the button then you write your conditional logic.
private void button1_Click(object sender, EventArgs e)
{
var control = sender as Control;
if (control.Name == "button1")
{
Console.WriteLine($"Clicked {control.Name} button");
}
else if (((Control)sender).Name == "button2")
{
Console.WriteLine($"Clicked {control.Name} button");
}
}
Here's what H have so far:
private void button1_Click(object sender, EventArgs e)
{
button3.BackgroundImage = slideshow_test.Properties.Resources.ai_yori_aoshi_5370;
}
private void button2_Click(object sender, EventArgs e)
{
button3.BackgroundImage = slideshow_test.Properties.Resources.AiYoriAoshi_feature;
}
private void button3_Click(object sender, EventArgs e)
{
audio.Stop();
if (button1.Enabled == true)
{
timer1.Stop();
pictureBox1.Visible = false;
System.Diagnostics.Process.Start("http://www.watchcartoononline.com/anime/ai-yori-aoshi-guide");
if (button2.Enabled == true)
{
timer1.Stop();
pictureBox1.Visible = false;
System.Diagnostics.Process.Start("http://www.watchcartoononline.com/anime/ai-yori-aoshi-enishi-guide");
}
}
}
this is only my test so far but what i want to do is change what button 3 does, i.e. if button 1 is clicked button three will open webpage 1, if button2 is clicked button 3 will open webpage 2, button 3's image will change depending, but what im finding with what i have done so far is that it opens BOTH pages AT THE SAME TIME ... how to i prevent this? i have tried if, else and else if, same result every time.
Both of your buttons are enabled, you are checking to see if the buttons are enabled or disabled (clickable or not), not which one has been clicked.
also:if (button2.Enabled == true)
is nested in the first conditional, I'm not sure if that's what you want.
You can: disable buttons 1 and 2 after their clicked so that, for instance button2.Enabled will now = false; (but then you will not be able to reclick that button)
More sophisticated, but better, is to use a delegate for the button3, and assign them in your button1_Click and button2_Click events. Something like this:
private void button1_Click(object sender, EventArgs e)
{
button3.BackgroundImage = slideshow_test.Properties.Resources.ai_yori_aoshi_5370;
button3.Click += new EventHandler(this.Button3_Click_First);
}
private void button2_Click(object sender, EventArgs e)
{
button3.BackgroundImage = slideshow_test.Properties.Resources.AiYoriAoshi_feature;
button3.Click += new EventHandler(this.Button3_Click_Second);
}
void Button3_Click_First(Object sender,
EventArgs e)
{
// When the button is clicked,
// change the button text, and disable it.
timer1.Stop();
pictureBox1.Visible = false;
System.Diagnostics.Process.Start("http://www.watchcartoononline.com/anime/ai-yori-aoshi-guide");
}
void Button3_Click_Second(Object sender,
EventArgs e)
{
timer1.Stop();
pictureBox1.Visible = false;
System.Diagnostics.Process.Start("http://www.watchcartoononline.com/anime/ai-yori-aoshi-enishi-guide");
}
You may also have to check and make sure an event handler was not previously assigned, in calse someone clicks button1, then button2, then button1 ect. This is described here: Removing event handlers
You can handle your problem by storing the URL of the webpage in a private field, setting it when buttons 1 or 2 are clicked and reading from it after clicking button 3.
private string _address = null;
private void button1_Click(object sender, EventArgs e)
{
// do other stuff
_address = "http://www.watchcartoononline.com/anime/ai-yori-aoshi-guide";
}
private void button2_Click(object sender, EventArgs e)
{
// do other stuff
_address = "http://www.watchcartoononline.com/anime/ai-yori-aoshi-enishi-guide";
}
private void button3_Click(object sender, EventArgs e)
{
if (_address != null)
{
audio.Stop();
if (button1.Enabled || button2.Enabled)
{
timer1.Stop();
pictureBox1.Visible = false;
System.Diagnostics.Process.Start(_address);
}
}
}
I wasn't sure if all the code in button3_Click is necessary, so I cleared it up a little. I might be a bit off, though.
button.Enabled is always true for all buttons by default unless you set it to false. So you cannot use button1.Enabled property to check which button is pressed. try below approach.
protected void Button1_Click(object sender, EventArgs e)
{
ViewState["Button1Clicked"] = true;
}
protected void Button2_Click(object sender, EventArgs e)
{
ViewState["Button1Clicked"] = false;
}
protected void Button3_Click(object sender, EventArgs e)
{
if ((bool)ViewState["Button1Clicked"])
{
//open webpage2 code comes here
}
else
{
//open webpage2 code comes here
}
}
I'm having this code:
private void b9_Click(object sender, EventArgs e)
{
b9.Enabled = false;
color = 8;
}
The problem is that i'm having a lot of buttons for disabling. Is there a chance i can use something like:
this.Enabled=false;
Probably that is what you want
private void OnClick(object sender, EventArgs e)
{
if( sender is Button )
{
Button button = (Button)sender;
button.Enabled = false;
}
}
Use this routine for every button you need to disable on click.
It is known as single event handler for multiple controls. Just put following event handler for your buttons as many as you like.
public void Button_Click(object sender, EventArgs e)
{
Button button = (Button)sender;
button.IsEnable = false;
// If you want to access text in the button
... = button.Content as object;
}
private void OnClick(object sender, EventArgs e)
{
Button btn = sender as Button; // if sender is not a Button, btn will be null
if (btn != null)
{
btn.Enabled = false;
}
}
If you want to apply the same behaviour to any clickable control, you can use Control class instead of Button. Button inherits from Control and the property Enabled is defined in Control class.
private void OnClick(object sender, EventArgs e)
{
Control ctrl = sender as Control; // if sender is not a Control, ctrl will be null
if (ctrl != null)
{
ctrl .Enabled = false;
}
}
Also, if you want to go one step further, you can create a method that disables the clicked control. Something like this:
private void DisableControl(object sender)
{
Control ctrl = sender as Control;
if (ctrl != null)
{
ctrl.Enabled = false;
}
}
Then, you can call this method from the Click even handler like this:
private void OnClick(object sender, EventArgs e)
{
DisableControl(sender);
}
I have a datagrid in WPF with first column as a checkbox. I have now added a select all checkbox which appears on the header of the column that it is bound to.
The handlers for the select all checkbox and individual row check boxes are defined as:
private void SelectAllCheckBox_Checked(object sender, RoutedEventArgs e)
{
foreach (BaseDataItem objItem in BaseReleaseList)
{
objItem.Select = true;
}
BaseReleaseDataGridView.Items.Refresh();
}
private void SelectAllCheckBox_Unchecked(object sender, RoutedEventArgs e)
{
foreach (BaseDataItem objItem in BaseReleaseList)
{
objItem.Select = false;
}
BaseReleaseDataGridView.Items.Refresh();
}
private void RowCheckBoxUnchecked(object sender, RoutedEventArgs e)
{
SelectAllCheckBox.IsChecked = false;
}
private void RowCheckBoxChecked(object sender, RoutedEventArgs e)
{
if (AreAllCheckBoxesChecked())
SelectAllCheckBox.IsChecked = true;
else
SelectAllCheckBox.IsChecked = false;
BaseReleaseDataGridView.Items.Refresh();
}
private bool AreAllCheckBoxesChecked()
{
foreach (BaseDataItem objItem in BaseReleaseList)
{
if (!objItem.Select)
return false;
}
return true;
}
Now the problem is that whenever i click on the select all checkbox or the row check box, control gets stuck inside an infinite loop. Reason is that whenever i set, select to true or false, it again fires an event. How can this be handled.
Instead of tapping two events Checked and UnChecked, register to Click event. Click event will be raised on when user clicks on the checkbox unlike Checked/UnChecked which get called even when you check/uncheck your checkbox programatically.
<CheckBox Name="SelectAllCheckBox" Click="SelectAll_OnClick"></CheckBox>
in handler
private void SelectAll_OnClick(object sender, RoutedEventArgs e)
{
bool? isChecked = SelectAllCheckBox.IsChecked;
if (isChecked.HasValue)
{
foreach (BaseDataItem objItem in BaseReleaseList)
{
objItem.Select = isChecked;
}
BaseReleaseDataGridView.Items.Refresh();
}
}
I have the following code which checks each radio button (Temp30, Temp40 and Temp60) and does the necessary things such as turning the wash temperature light on etc...
I want to create an event which handles all 3 radio buttons. I thought it could possibly have something to do with the groupbox they are in? (it is called TempGroupBox)
Any help would be much appreciated!
private void Temp30_CheckedChanged(object sender, EventArgs e)
{
if (Temp30.Checked)
{
MainDisplayLabel.Text = (" SELECT SPIN SPEED");
WashTempLight.Visible = true;
WashTempLight.Image = Properties.Resources._30degrees;
SpeedGroupBox.Enabled = true;
}
}
private void Temp40_CheckedChanged(object sender, EventArgs e)
{
if (Temp40.Checked)
{
MainDisplayLabel.Text = (" SELECT SPIN SPEED");
WashTempLight.Visible = true;
WashTempLight.Image = Properties.Resources._40degrees;
SpeedGroupBox.Enabled = true;
}
}
private void Temp60_CheckedChanged(object sender, EventArgs e)
{
if (Temp60.Checked)
{
MainDisplayLabel.Text = (" SELECT SPIN SPEED");
WashTempLight.Visible = true;
WashTempLight.Image = Properties.Resources._60degrees;
SpeedGroupBox.Enabled = true;
}
}
You can bind all radioButton's event to the same handler and use sender parameter to get the control that the action is for.
private void Temps_CheckedChanged(object sender, EventArgs e)
{
string checkedName = ((RadioButton)sender).Name;
if(checkedName == "Temp40")
{
...
}
else if(checkedName == "Temp60")
{
...
}
}
You can add event handler for all RadioBUttons's like that after InitializeComponent():
var radioButtons =this.Controls.OfType<RadioButton>();
foreach (RadioButton item in radioButtons)
{
item.CheckedChanged += Temps_CheckedChanged;
}