I'm trying to call a method as soon as a TextBox on my screen gets 'un-focused' if that makes any sense? The user types in a username and as soon as that textbox loses focus I want to fire an event that checks if that username is indeed available.
Thanks!
There is a Control.Leave in C#, which I think is perfect for your purpose.
you can go to events of the textbox in visual studio, and find the Leave event.
The code generated will be like :
private void txtbox_Leave(object sender, EventArgs e)
{
//Check for available operation Code
}
Please explore the LostFocus event in a textbox. Hope it helps
select your object and to choose the panel of the properties and click on event.To unroll until LEAVE and double-click above.that will give you:
private void object_Leave( object sender, EventArgs e)
{
////put your code here
}
In WPF Try this:
TextBox.LostFocus
This will work:
Go to the "properties" of your textbox. You will see a yellow lightning bolt in the first line tab. There you will find all possible events that can be triggered. Search for "Leave" entry, double-click it. There you can put whatever you want.
Related
I'm creating form application on c# . I have dragged a textbox with some text in it.
private void textBox1_Click(object sender, EventArgs e)
{
}
Now what is the event for the onlick on textBox1 ?
I need to add this on that function textBox1.Clear();
P.S I searched everywhere. But all i can find is jquery and javascripts... No c#.
EDIT
I tried onfocus like below..but its not working
private void textBox1_OnFocus(object sender, EventArgs e)
{
MessageBox.Show("dsd");
}
If you want to do something when the control is clicked the handle the Click event, not the TextChanged event. Presumably you just double-clicked the control in the designer. That will only handle the default event. To handle other events, open the Properties window, click the Events button at the top and then double-click the appropriate event.
That said, is Click really appropriate? What if the user enters the TextBox using the Tab key? If what you actually want to do is act when the control gets focus then you should handle the Enter event.
You can handle OnFocus/GotGocus event in the TextBox, and clear the text in the textbox.
Hope this helps.
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 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.
I'm working in C# Express 2010 program and in one form I have a question that its answers are two radio buttons with two selections Yes and No. When the user chooses yes, another hidden question should appear to the user in the same form to let him/her answer it.then depending on the user's answer, if it is yes, then a formula will be calculated. if he/she answers No, nothing will be calculated.
Thank you.
Any help is appreciated!
Try to handle the RadioButton.CheckedChanged event.
Also refer to the following:
RadioButton Class
RadioButton
Radio Button Control
EDIT: I should have written "CheckedChanged" not "Checked" Thanks, #Akram
You need to use the RadioButton.Checked event.
Then place your calculations and code to show the next question in the event handler.
Addition Info:
In your environment, click on the radio button on your form. Then under the properties window, click on the Events tab (the one that looks like a lightning bolt) and go to "Checked". Double Click on the evnt and the event handler will be stubbed out for you.
you can use the RadioButton.Checked
private void YESradioButton_Checked(object sender, RoutedEventArgs e)
{
label1.Visibility = System.Windows.Visibility.Visible; // to show your question
}
and you can make :
private void NOradioButton_Checked(object sender, RoutedEventArgs e)
{
label1.Visibility = System.Windows.Visibility.Hidden; // to hide your question
}
I'd like give focus to a textBox after a Tab has been selected but no matter what I try it doesn't work. I've looked at similar questions here but they don't get me the results I need. Here is what Ive tried.
private void tabBDERip_Click(object sender, EventArgs e)
{
textBoxPassword.Focus();
}
and
private void tabAll_SelectedIndexChanged(object sender, EventArgs e)
{
if (tabAll.SelectedTab == tabBDERip)
{
textBoxPassword.Focus();
}
}
Can someone please tell me what I'm doing wrong?
Thanks
First thing the Click event of the TabPage control fires when the user clicks inside the TabPage not on the header so your SelectedIndexChanged event is the one you want to use.
I just tested code very similiar to yours:
private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
{
if (tabControl1.SelectedTab == tabPage2)
{
textBox4.Focus();
}
}
And it worked fine.
Is the password textbox not enabled or something like that?
If you try to call Focus() on a different control does that also not work?
If you set a breakpoint inside the SelectedIndexChanged code does it get hit?
Update: Interesting. If the breakpoint isn't getting hit (before the if) I would double check that your eventhandler is properly attached. Look in your designer.cs for something like:
this.tabControl1.SelectedIndexChanged += new System.EventHandler(this.tabControl1_SelectedIndexChanged);
Update: I put my working example at http://www.ccswe.com/temp/SO_TextBoxFocus.zip maybe looking at it will help you figure out where the issue is.
Update: The easier way to attach an event handler to a control on your form:
1: Select the Control to want to attach an event handler to and then click the Events icon (lightning bolt) in the Properties window.
alt text http://www.ccswe.com/temp/Attach_EventHandler_1.png
2: Find the event you want to attach to and double click to the right.
alt text http://www.ccswe.com/temp/Attach_EventHandler_2.png
3: A code stub will be automatically generated for you and the event will be attached in the designer.
alt text http://www.ccswe.com/temp/Attach_EventHandler_3.png
If you look at the properties window again you'll now see the name of the method that was generated.