I am making a Program, which has two checkboxes in a windows form. The first CheckBox is for clearing a file, the other for printing it out. But the final selection, the starting of the method is a button. I wanna make something like an if-statement like "if checkbox1 is clicked do this and this". But it should be fired by the Button.
You can do this in button's event:
if (checkbox1.Checked)
{
//Do something
}
In Visual Studio, while editing the form in the visual designer, if you double click on the button, you'll be taken to the code file. It'll have generated a method for you, called (name of your button)_Click (object sender, EventArgs e). It will also be bound to the button click automatically. Just put your code in there.
Related
I am beginner to the C# and Visual Studio. I just wanted to ask how to put back-end code for a label.Just like when we press a double click on a button. It's back-end code just appears in .cs file, just like below
private void UIButton97_TouchUpInside(UIButton sender)
{
}
So can we do the same thing with a label.
Any help is appreciated.
check event that available for label, and you can add some behavior in that event. for example i will use label in my current project :
Add Event Text Changed in the label
this.aboutLabel.TextChanged += new System.EventHandler(this.aboutLabel_TextChanged);
Define method that handle event like below
private void aboutLabel_TextChanged(object sender, EventArgs e)
{
//do some bahaviour in here
}
The event above will be execute when text in label changed.
For simple way just right click --> properties in label element , click Events (In visual studio usually represent as thunderbolt image), double click empty field in beside event that you want to fire, see image below :
It seems like a straight forward thing, but I can't figure it out.
How can I check if a certain button was clicked from user control?
my user control is uc_test and button name is btnTest .
I assume its some sort of event handler added to uc_test.btnTest ?
I'm working in WinForms.
It sounds like you've created a button but want to make it do something on click. I don't often use Winforms but from memory double-clicking on the control in the form should automatically create a btnTest_Click method. If not, just go to code and put in a method like:
protected void btnTest_Click(object sender, Eventargs e)
{
//do something
}
Then set in the properties of the button the OnClick event to btnTest_Click.
I currently have a tabcontrol on my windows form in visual studio, i would like it so that when the user clicks on a different tab that i can execute some code (for example populate a listbox).
when i double click on the tab it only brings up an onclick event for the body of the tabcontrol.
i was thinking that i may have to create a thread in the form load that will constantly check whether the tab index changes and if it does then execute some code. but surely there must be an easier way?
You can use TabControl.Selecting or TabControl.SelectedIndexChanged event
private void tabControl1_Selecting(object sender, TabControlCancelEventArgs e)
{
//Your code goes here.
}
You should look at TabControl events
http://msdn.microsoft.com/en-ie/library/system.windows.forms.tabcontrol.selecting.aspx
I am having a strange problem with the .NET TabControl in C# (Visual Studio 2010). Start a Windows Forms Application. Add a tab control and a button. Add two different labels to the two tab pages so you can differentiate them. The purpose of the button is just to act as a next button; subscribe to the its Click event with the code:
tabControl1.SelectTab(1);
Let's assume the user entered something wrong on the first tab, so when they try to go to the second tab we want to send them back, so subscribe to the tab control's SelectedIndexChanged event with the code:
if(tabControl1.SelectedIndex == 1)
{
tabControl1.SelectTab(0);
}
Now run the program and click the button. You will notice that as judged by the highlighted tab at the top, the first tab page is the one that appears to be selected, as you'd expect. However, as judged by the tab page that actually appears in the body of the tab control, it's still the second tab page that shows up! Calls to various controls' Focus(), Update(), and Refresh() functions don't seem to help. What is going on here?
I repro. This is a generic problem with event handlers, you can confuse the stuffing out the native Windows control by jerking the floor mat like that. TreeView is another control that's very prone to this kind of trouble.
There's an elegant and general solution for a problem like this, you can use Control.BeginInvoke() to delay the command. It will execute later after the native control is done with the event generation and all side-effects have been completed. Which solves this problem as well, like this:
private void tabControl1_SelectedIndexChanged(object sender, EventArgs e) {
if (tabControl1.SelectedIndex == 1) {
this.BeginInvoke(new Action(() => tabControl1.SelectTab(0)));
}
}
I have a textbox in Form and i want to detect when the text has changed but the code I have found is giving me no joy.
I am probably missing something in the proporties or something you have to define before.
Here is my code:
private void tbxparkingTimesS1_TextChanged(Object sender, EventArgs e)
{
MessageBox.Show("You are in the ToolStripItem.TextChanged event.");
}
Thanks for any help with this trivial problem.
To wire the TextChanged event to a particular method inside your code do the following
Click on the TextBox inside your form
Open the properties windows (press F4 or menu View -> Property Window )
Select the event page (lightning icon)
Double click on the TextChanged property line
Insert your code inside the template build for you by Visual Studio
Have you assigned the event handler to the textbox?
Normally this will be done "behind the scenes" by Visual Studio - with the result being an additional line of code in your .designer file.
Something like:
this.tbxparkingTimesS1.TextChanged += new System.EventHandler(tbxparkingTimesS1_TextChanged);
(It['s been a while since I've done webforms - so that might be slightly off)
Double Click on Text box it will generate text change event for you.
private void tbxparkingTimesS1_TextChanged(object sender, EventArgs e)
{
// implement your code here.
}
When you double click VS will create event handler in your designer.cs file as bellow
this.tbxparkingTimesS1.TextChanged += new System.EventHandler(this.tbxparkingTimesS1_TextChanged);
You can do the same by using property window events or create event on code behind.