I have the following code:
private void form1_closing(object sender, FormClosingEventArgs e)
{
e.Cancel = true;
this.Hide();
}
I want a button that closes the form, without triggering this event. How do I do this?
The code for the button:
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
Application.Exit();
}
I want the above button to close the form and not hide it.
//unsubscribe the mean "don't let me close" handler
this.FormClosing -= form1_closing;
//close form
this.Close();
Another option would be to make a boolean field "shouldIReallyClose". Default it to false. When you really want to close the form set it to true. Change the event handler to check that boolean before canceling the event.
protected override void OnFormClosing(FormClosingEventArgs e)
{
if(!boolTrackingButtonPressed)
{
base.OnFormClosing(e);
}
}
Related
I have a Log In form and I need to know if user pressed the X button on form or the button that takes him to the new form. If user closed the program with Alt+F4 or X button the program must be closed.
I was trying with FormClosing event to check whether user pressed X or login.
private void LogIn_FormClosing(object sender, FormClosingEventArgs e)
{
if (string.Equals((sender as Button).Name, #"loginButton"))
{
//some code
}
else
{
Close();
}
}
The FormClosing event handler receives a FormClosingEventArgs argument that contains the property CloseReason, but in your context this is not enough.
Indeed, in both cases (ALT+F4/X-Click or ButtonClick) the argument will contain a CloseReason equal to UserClosing.
I suggest you a simple workaround. In your button click handler (where you should call the close action on the form, not on the formclosing event handler itself), add something to the Tag property of the form like so:
private void Button1_Click(object sender, EventArgs e)
{
this.Tag = "ClosedByUser";
this.Close();
}
now in the FormClosing event handler is simple to check this property
private void LogIn_FormClosing(object sender, FormClosingEventArgs e)
{
if (this.Tag != null)
{
// Button clicked
}
else
{
// other reasons
// Dp not call Close here, you are already closing
// if you don't set e.Cancel = true;
}
}
I am validating input on textboxes on the FormClosing event of my Form and if the user decides to cancel closing, I set e.Cancel = true so as to stop the FormClosing event. I then try to set focus to the first textbox but this is not working.
private void AddDriver_Window_FormClosing(object sender, FormClosingEventArgs e)
{
if (this._Cancel(sender, e))
{
e.Cancel = true;
this.textboxFirstName.Focus();
}
}
If you are interested in seeing the ._Cancel method I asked an unrelated question earlier.
I tried this one Check this is it work for you..
private void AddDriver_Window_FormClosing(object sender, FormClosingEventArgs e)
{
if( DialogResult.Cancel == MessageBox.Show("Do you want to exit programm","Alert",MessageBoxButtons.OKCancel))
{
e.Cancel = true;
textBox1.Focus();
}
}
this will popup a message box and if click cancel then automatically focus on the textbox1.
I have a code to detect keyboard input on a plugin
private void Plugin_Load(object sender, EventArgs e)
{
mouse = new MouseInput();
mouse.MouseMoved += mouse_MouseMoved;
}
void mouse_MouseMoved(object sender, EventArgs e)
{
if (testBool== true)
{
return; // Trying to cancel mouse event
}
}
I need to cancel event e(EventArgs), but return does not seems to work.
MouseEventArgs is a Winform event so doesn't works on my code.
Kindly suggest on how to cancel the event.
Thanks
I have a form which I use as a modal dialog box for data entry. When the user clicks on the OK button on the form, I want the button handler to perform data validations and if there is any error the form should reload/redisplay itself instead of returning to the caller. Is this possible?
Caller code:
DatasetProperties propsWindow = new DatasetProperties();
if (propsWindows.ShowDialog() == DialogResult.Cancel)
return;
// Do other stuffs here
Form code:
public partial class DatasetProperties : Form
{
// Constructor here
// OK button handler
private void btnOK_Click(object sender, EventArgs e)
{
// Do data validations here
if (errorsFound)
{
// How to reload/redisplay the form without return to caller?????
}
}
}
Thanks for any help,
Don't let the user close the form without validation.
Use the FormClosing event. Here's an example. In lieu of the messageBox, include your validation code. If it doesn't validate, e.cancel = true.
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (MessageBox.Show("Are you sure you want to cancel without saving any changes?", "Confirm Cancel", MessageBoxButtons.YesNo) != DialogResult.Yes)
e.Cancel = true;
}
You can set the Form.DialogResult inside your DatasetProperties.btnOK_Click method to DialogResult.None, this way your DatasetProperties form will not return to the caller Form ('close').
// OK button handler
private void btnOK_Click(object sender, EventArgs e)
{
// Do data validations here
if (errorsFound)
{
this.DialogResult = System.Windows.Forms.DialogResult.None;
// How to reload/redisplay the form without return to caller?????
}
}
This way you can 'stay' in your DatasetProperties form as long as you have errors.
From the msdn, when the DialogResult Enumeration is set to None Nothing is returned from the dialog box. This means that the modal dialog continues running.
as user1646737 mentioned you can use FormClosing event like this:
private void btnOK_Click(object sender, EventArgs e)
{
// Do data validations here
Close();
}
Event:
private void DatasetProperties_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = errorsFound;
}
I have a form which contains a close button (there are many control in the form, but I am concerning about the close event) and a save button.
If a form have value in certain text box (say TextBox1),
Then I want to validate that the save button is clicked before closing the form (whether close button or the 'X' button at top is pressed).
But if there is no value in that text box or the form is just initialized and user just want to close the form, it simply closes the form. How to perform this validation.
I would follow the pattern of 99% of windows applications: allow to close a window, but ask to save changes if there are any. Here is a simple implementation of that pattern:
private bool _hasChanges;
private void textBox1_TextChanged(object sender, EventArgs e)
{
this._hasChanges = true;
}
private void form_FormClosing(object sender, FormClosingEventArgs e)
{
if (this._hasChanges)
{
var dialogResult = MessageBox.Show("Save changes?", "Confirm", MessageBoxButtons.YesNoCancel);
switch (dialogResult)
{
case DialogResult.Yes:
this.Save();
break;
case DialogResult.No:
this._hasChanges = false;
break;
}
e.Cancel = this._hasChanges;
}
}
private void Save()
{
// Save
this._hasChanges = false;
}
private void buttonSave_Click(object sender, EventArgs e)
{
this.Save();
}
private void buttonOk_Click(object sender, EventArgs e)
{
this.Close();
}
private void buttonCancel_Click(object sender, EventArgs e)
{
this._hasChanges = false;
this.Close();
}
The pivotal part is the boolean _hasChanges. If there are many controls that can cause changes this can be real pain. An alternative could be to use databinding to a class that implements INotifyPropertyChanged and subscribe to its PropertyChanged event.
Tie into the Closing Event and use your EventHandler to validate that textbox. Keep in mind that Closing occurs at the time the form is closing and (if memory servers correctly) there is a property on the eventarg that will let you cancel closing of the form. This event is raised regardless of how the request is executed.