I had an problem with my application closing in c#. When I hit the close button it display twice or more times the message box. What should I do?
private void home_FormClosed(object sender, FormClosedEventArgs e)
{
DialogResult dialog = MessageBox.Show("Are you sure you want to really exit ? ",
"Exit",
MessageBoxButtons.YesNo,
MessageBoxIcon.Question);
if (dialog == DialogResult.Yes)
{
System.Windows.Forms.Application.Exit();
}
else if (dialog == DialogResult.No)
{
this.Show();
}
}
Use Form1_FormClosing event and also don't use Application.Exit() like this:
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
var x = MessageBox.Show("Are you sure you want to really exit ? ",
"Exit", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (x == DialogResult.No)
{
e.Cancel = true;
}
else
{
e.Cancel = false;
}
}
Or like this:
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = MessageBox.Show("Are you sure you want to really exit ? ",
"Exit", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No;
}
you should use the Form.FormClosing event instead of the FormClosed event. in the arguments, you find a field e.Cancel. by setting this to false, you keep your form open
You can avoid the multiple prompts by checking to see if Application.Exit() has been called already from within the FormClosing event:
void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason != CloseReason.ApplicationExitCall)
{
DialogResult dialog = MessageBox.Show("Are you sure you want to really exit ? ", "Exit", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (dialog == DialogResult.Yes)
{
System.Windows.Forms.Application.Exit();
}
else if (dialog == DialogResult.No)
{
e.Cancel = true;
}
}
}
Use the form closing event instead.
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
var confirmation = MessageBox.Show("Sure to close form", "Confirm", MessageBoxButtons.YesNo);
if (confirmation == System.Windows.Forms.DialogResult.No)
{
e.Cancel = true; //Even cancelled, form will not get closed now
}
}
Related
There is two forms in my program,The first one is a simple login form that after everything was right loginform hides and the other shows.
But the problem is if i try to close the program at loginform and press no then when i press signin button with correct values the closing messagebox shows up again with no reason!!!!
private void LoginForm_FormClosing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.UserClosing)
{
DialogResult DR= MessageBox.Show("do you want to exit?", "Exit", MessageBoxButtons.YesNo, MessageBoxIcon.Information, MessageBoxDefaultButton.Button2);
if (DR == DialogResult.Yes)
Application.Exit();
else if (DR == DialogResult.No)
e.Cancel=true;
}
}
private void Sign_in_Button_Click(object sender, EventArgs e)
{
if (AccountExistStatus(UserNameLogin.Text)==true&&PasswordMatch(PasswordLogin.Text))
{
this.Hide();
}
else if (UserNameLogin.Text == "Echo" && PasswordLogin.Text == "XLVI")
{
this.Hide();
}
}
I think your problem is that you have just hidden that Login form, you have not closed it anywhere. Have a look at the following code which solves your problem. it will close your LoginForm also at the close of the next form
private void Sign_in_Button_Click(object sender, EventArgs e)
{
if (AccountExistStatus(UserNameLogin.Text)==true&&PasswordMatch(PasswordLogin.Text))
{
DisplayForm2();
}
else if (UserNameLogin.Text == "Echo" && PasswordLogin.Text == "XLVI")
{
DisplayForm2();
}
}
void DisplayForm2() {
this.Hide();
var form2 = new Form2();
form2.Closed += (s, args) => this.Close();
form2.Show();
}
I am using the before select event on a tree view to trigger a "Save your changes" cycle.
Everything works fine but I recently added in some validation of a few fields and a need to be able to cancel the event. It appears the e.Cancel = true in the below code causes the BeforeSelect event to fire twice.
private void TvEmps_BeforeSelect(object sender, TreeViewCancelEventArgs e) {
if (dgchanged) {
DialogResult dialogResult =
MessageBox.Show("Save your changes?", "Confirmation", MessageBoxButtons.YesNo);
if (dialogResult == DialogResult.Yes) {
BtnSaveAll_Click(sender, e);
if (!isvalid) {
e.Cancel = true; // this causes the beforeselect event to fire twice
return;
}
}
}
}
I have tried the following but I am still getting double prompted:
{
if (dialogShowing) return;
if (dgchanged == true)
{
dialogShowing = true;
DialogResult dialogResult = MessageBox.Show("Save your changes?", "Confirmation", MessageBoxButtons.YesNo);
dialogShowing = false;
if (dialogResult == DialogResult.Yes)
{
BtnSaveAll_Click(sender, e);
e.Cancel = !isvalid;
}
}
}```
As commented, the DialogBox is the cause of the BeforeSelect firing again, because it causes the TreeView control to regain the focus.
To work around the issue, try using a variable to determine if the dialog should be raised:
private bool dialogShowing = false;
private void TreeView1_BeforeSelect(object sender, TreeViewCancelEventArgs e)
{
if (dialogShowing) return;
dialogShowing = true;
DialogResult dr = MessageBox.Show("Confirm?", "Warning", MessageBoxButtons.YesNo);
dialogShowing = false;
if (dr == DialogResult.Yes)
{
// call save
} else
{
e.Cancel = true;
}
}
How can I prevent window closing by showing a MessageBox? (Technology:WinForms with C#)
When the close event occurs I want the following code to be run:
private void addFile_FormClosing( object sender, FormClosingEventArgs e ) {
var closeMsg = MessageBox.Show( "Do you really want to close?", "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Question );
if (closeMsg == DialogResult.Yes) {
//close addFile form
} else {
//ignore closing event
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e) {
var window = MessageBox.Show(
"Close the window?",
"Are you sure?",
MessageBoxButtons.YesNo);
e.Cancel = (window == DialogResult.No);
}
Catch FormClosing event and set e.Cancel = true
private void AdminFrame_FormClosing(object sender, FormClosingEventArgs e)
{
var res = MessageBox.Show(this, "You really want to quit?", "Exit",
MessageBoxButtons.YesNo, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button2);
if (res != DialogResult.Yes)
{
e.Cancel = true;
return;
}
}
A special twist might be to always prevent just the user closing the form:
private void Frm_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = (e.CloseReason == CloseReason.UserClosing);
// disable user closing the form, but no one else
}
Within your OnFormClosing event you can show the dialog and if answer is false (to not show) then set the Cancel property of the EventArgs to true.
For prevent or block the form closing in particular situation you can use this strategy:
private void MyForm_FormClosing(object sender, FormClosingEventArgs e)
{
if (FLAG_CONDITION == true)
{
MessageBox.Show("To exit save the change!!");
e.Cancel = true;
}
}
Straight from MSDN:
private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
// Determine if text has changed in the textbox by comparing to original text.
if (textBox1.Text != strMyOriginalText)
{
// Display a MsgBox asking the user to save changes or abort.
if(MessageBox.Show("Do you want to save changes to your text?", "My Application",
MessageBoxButtons.YesNo) == DialogResult.Yes)
{
// Cancel the Closing event from closing the form.
e.Cancel = true;
// Call method to save file...
}
}
}
In your case you don't need to do anything to explicitly close the form. Unless you cancel it it will close automatically, so your code would be:
private void addFile_FormClosing( object sender, FormClosingEventArgs e ) {
var closeMsg = MessageBox.Show( "Do you really want to close?", "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Question );
if (closeMsg == DialogResult.Yes) {
// do nothing
} else {
e.Cancel = true;
}
}
You can run any code you want when closing the form then, hide the form instead of closing it to prevent it from being disposed
yourFormName.FormClosing += (s, e) =>
{
// any code you want
yourFormName.Hide(); // this hides the form
e.Cancel = true; // this cancels the close event, you can put any boolean exprission
};
I making a C# Windows Forms Application. I'm trying to have a message box popup when the "X" or Close Button is pressed to exist out of the application. This is what I have so far, and I don't know whats wrong with it. When I run the message box doesn't show up when I click on the Close Button. Any help would be appreciated. Thanks.
private void MainWindow_FormClosing(object sender, FormClosingEventArgs e)
{
if (this.DialogResult == DialogResult.Cancel)
{
if (MessageBox.Show("Do you want to save changes to the data?",
"MktAuthorizationData",
MessageBoxButtons.YesNo) == DialogResult.Yes)
{
e.Cancel = true;
// Do Something
}
}
}
You need to remove below condition
if (this.DialogResult == DialogResult.Cancel)
The below code should work
private void MainWindow_FormClosing(object sender, FormClosingEventArgs e)
{
if (MessageBox.Show("Do you want to save changes to the data?",
"MktAuthorizationData",
MessageBoxButtons.YesNo) == DialogResult.Yes)
{
e.Cancel = true;
// Do Something
}
}
In case you haven't subscribed to the event you need to do this by having this after InitializeComponent();
this.FormClosing += MainWindow_FormClosing;
You can add a Button Close event to close your window form with message box.
private void btnClose_Click(object sender, EventArgs e)
{
if (MessageBox.Show("Do you want to save changes to the data?",
"MktAuthorizationData",
MessageBoxButtons.YesNo) == DialogResult.Yes)
{
e.Cancel = true;
// Do Something
}
}
I'm trying to detect whether or not the user have save their work before closing the program. I've tried the below coding:
void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.UserClosing)
MessageBox.Show("Unsave Work");
}
But it does not work. Nothing happen when I close the program.
There are two primary ways to add an EventHandler in .Net.
You can use the designer to add it.
Or you can add it in code
public Form1()
{
InitializeComponent();
this.FormClosing+=new FormClosingEventHandler(Form1_FormClosing);
}
void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.UserClosing)
{
var result = MessageBox.Show("Unsave Work", "", MessageBoxButtons.OKCancel);
if (result == DialogResult.Cancel)
e.Cancel = true;
}
}
Please first bind your Formclosing function to FormClosing event.
Then check like that below:
void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.UserClosing)
{
if(work not saved)//Check your condition
{
MessageBox.Show("Unsave Work");
e.Cancel = true;
}
}
}
just ask the user like this:
if (MessageBox.Show("Would you like to save your work", "Save work", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
SaveWork();
}
and if you have a way to detect if the user has saved work or not first that would be even better:
if (!IsWorkSaved())
{
if (MessageBox.Show("Would you like to save your work", "Save work", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
SaveWork();
}
}