Develop Reference

Close current form if dialog results for dialogbox is cancel

I have a Form (frmcustlist).
At one time on this list i scan the list using a dataset and check if it now 0 (no customers left).
At this stage i have an input box pop up (dialog) to ask a new customer name.
If they press OK everything is fine. I also have validation on the box for the input.
However if they press CANCEL, i can get it to escape out of the dialog, but not close frmcustlist that the dialog was called from.
using (inputbox ipfirst = new inputbox("Enter Customer First Name:", "", ""))
{
if (ipfirst.ShowDialog() == DialogResult.OK)
{
newfirstname = ipfirst.answer;
}
else
{
this.Close();
}
}
Now, this.close() doesn't work at all.. so i used return; which stops it going on to ask for the last name and date of birth.. but i want it to stop asking questions (like return) AS WELL as close frmcustlist.
...
Thanks for any advice you can give.
ps. this appears in a few places, but is called in frmcustlist_load as well.. i dont know if that is going to make a difference or not!

Answer was made by STEVE in comments.
As frmcustlist was called itself as a Dialog, i just ended up having to give that dialog a Cancel result.
Final Code that works:
using (inputbox ipfirst = new inputbox("Enter Customer First Name:", "", ""))
{
if (ipfirst.ShowDialog() == DialogResult.OK)
{
newfirstname = ipfirst.answer;
}
else
{
DialogResult = DialogResult.Cancel;
return;
}
}

Cannot implicitly convert DialogResult to MessageBoxResult

I am receiving the error 'Cannot implicititly convert type 'System.Windows.Forms.DialogResult' to System.Windows.MessageBoxResult'
At first I thought this was just a missing import so I put imported System.Windows.Forms but it came to no avail as doing this throws up an error on my actual message box which is 'MessageBox' is an ambigous reference between 'System.Windows.MessageBox' and 'System.Windows.Forms.MessageBox' (Which isn't to hard to figure out :P) but the original message remains the same.
private void DisplayOnWebsiteChecked(Object sender, EventArgs e)
{
var departments = model.Name;
var departmentChildren = model.Children;
var messagebox = MessageBox.Show("Do you wish to hide all sub deparments and products.",
"List of Box",
MessageBoxButton.YesNo);
if (messagebox = System.Windows.Forms.DialogResult.Yes)
{
if (departmentChildren != null)
{
int zeroChildren = 0;
if (departmentChildren.Count.Equals(zeroChildren)) ;
{
foreach (Department Children in departmentChildren)
Children.IsVisibleOnWebsite = false;
}
}
}
else
return;
}
I have included the whole method just incase you need anything from it.

Given that you've now explained that this is a WPF app, if you're using System.Windows.MessageBox.Show you should be comparing against System.Windows.MessageBoxResult.
Basically, if you're doing WPF you almost certainly don't want any mention of System.Windows.Forms, and vice versa. (I'm surprised this was compiling at all - do you have references to both assemblies? That's generally a bad idea...)
Additionally, you need to use == for comparisons, not = (assignment)
var result = MessageBox.Show(...);
if (result == MessageBoxResult.Yes)
{
...
}

I think you've got your Windows Forms and WPF mixed up - if you're using the WPF MessageBox then your return value is different.
So it's not
messagebox = System.Windows.Forms.DialogResult.Yes
It's
messagebox == System.Windows.MessageBoxResult.Yes
Note also the == otherwise you're assigning the value, and the if test will always succeed (with a compiler warning).

You're problem is here:
if (messagebox = System.Windows.Forms.DialogResult.Yes)
First, you're assigning a DialogResult into a MessageBox. Secondly, you're attempting to compare a DialogResult with a MessageBox. Try something like:
if(MessageBox.Show("Message", MessageBoxButtons.YesNo) == DialogResult.Yes)
Or you can assign the DialogResult into its own variable, and compare that.

Cant find the issue in this loop

I have a form that the user inputs values that i save in an array but when the user wants to cancel i want the user to be asked a final time if the user wants to go ahead and cancel a reservation. If the user declines this final time i want the program to go back to the GUI and focus on the textbox with all the rows of reservations and not do the cancelation but i show u the code i have written and it asks the user if they are sure and if not it still deletes the reservation and then focus on the textbox. What is wrong in my code?
public void Cancelreservation()
{
int index = lstReservations.SelectedIndex;
bool checkedindex = m_seatMngr.CheckIndex(index);
if (checkedindex)
{
if (!m_seatMngr.CancelSeat(index))
{
if (lstReservations.SelectedIndex == -1)
{
MessageBox.Show("You need to select a row.", "Error!",
MessageBoxButtons.OK,
MessageBoxIcon.Exclamation,
MessageBoxDefaultButton.Button1);
lstReservations.Focus();
}
else
{
MessageBox.Show("The seat is not reserved! No need to cancel
reservation.", "Important Query",
MessageBoxButtons.OK);
lstReservations.Focus();
}
}
else
{
if (MessageBox.Show("Continue to cancel the reservation?",
"Important Query", MessageBoxButtons.YesNo)
== DialogResult.No)
{
lstReservations.Focus();
}
else
{
m_seatMngr.CancelSeat(index);
}
}
}
m_seatMngr
public bool CancelSeat(int index)
{
if (m_vacantList[index] == "Reserved")
{
m_nameList[index] = " - ";
m_priceList[index] = 0;
m_vacantList[index] = "Vacant";
return true;
}
else
{
return false;
}
}

Assuming that m_seatMngr.CancelSeat(index) is the method that actually cancels the seat, you are calling the method twice. The second if statement, half a dozen lines into your code, is this:
if (!m_seatMngr.CancelSeat(index))
... and it seems likely (given the above assumption) that this line will cancel the seat before you even display the MessageBox.

if (!m_seatMngr.CancelSeat(index))
{
// the rest of your code, which displays the messageboxes
}
This is always calling m_seatMngr.CancelSeat, before you've even displayed any messageboxes.

handle reply from message box c#

how can I handle message box reply example if the user click on yes do something if the user click on NO do another thing ?

Example (slightly modified) from the docs:
const string message =
"Are you sure that you would like to close the form?";
const string caption = "Form Closing";
var result = MessageBox.Show(message, caption,
MessageBoxButtons.YesNo,
MessageBoxIcon.Question);
// If the no button was pressed ...
if (result == DialogResult.No)
{
//Do something for No
}
else if (result == DialogResult.Yes)
{
//Do something else for Yes
}
Addendum: In the event that you're still on .NET 2.0 and don't have access to the var keyword, declare result as a DialogResult. I.e:
DialogResult result = MessageBox.Show(...);
Missed the fact that this was tagged with WPF, so if you're using that then you'd be using the slightly (but not too much) different System.Windows.MessageBox class instead of System.Windows.Forms.Messagebox. The interaction is largely the same, but also uses the MessageBoxResult enum instead of DialogResult, the MessageBoxImage enum instead of MessageBoxIcon, and the MessageBoxButton enum instead of MessageBoxButtons (plural). You should be able to do something like this:
const string message =
"Are you sure that you would like to close the form?";
const string caption = "Form Closing";
MessageBoxResult result = MessageBox.Show(message, caption,
MessageBoxButton.YesNo,
MessageBoxImage.Question);
if (result == MessageBoxResult.No)
{
// Do something for No
}
else if (result == MessageBoxResult.Yes)
{
// Do something else for Yes
}

Since the tag states WPF and NOT WinForms, you will need to do something like this for a MessageBox:
MessageBoxResult result = MessageBox.Show("Foo Bar?", "Confirmation", MessageBoxButton.YesNoCancel);
if (result == MessageBoxResult.Yes)
{
// yeah yeah yeah stuff
}
else if (result == MessageBoxResult.No)
{
// no no no stuff
}
else
{
// forget about it
}
In addition the dialogs are dealt with differently in WPF as well, note the absence of DialogResult:
SomeDialog dialog = new SomeDialog();
dialog.ShowDialog();
if (dialog.DialogResult.HasValue && dialog.DialogResult.Value)
MessageBox.Show("Clicked ok");
else
MessageBox.Show("Clicked cancel");

You should try using google or msdn (the links are clickable).
Anyways, you should check the value of the messageboxresult returned by the show method.
http://msdn.microsoft.com/en-us/library/ms598674.aspx

The best for me is
if (MessageBox.Show("Are you sure you want to close the window ?", "Question", MessageBoxButton.YesNo, MessageBoxImage.Warning) == MessageBoxResult.No)
{
//do NO stuff
}
else
{
//do YES stuff
}

DialogResult result = MessageBox.Show("Some Text", "Title", MessageBoxButtons.YesNoCancel);
if(result == DialogResult.Yes)
{
// do something
}

Here is an example:
DialogResult userSelection = MessageBox.Show("Some question","Question",MessageBoxButtons.YesNo,MessageBoxIcon.Question);
// Do something with userSelection

childwindow's in WPF are asynchronous actions. You have to handle the Close event, and inside your close event then you can perform your logic.

How do I create a message box with "Yes", "No" choices and a DialogResult?

I want to make simple Yes/No choiced MessageBox, but I think it is nonsense to design a form for that. I thought I could use MessageBox, add buttons, etc. to accomplish this. It is simple, but since there is no DialogResult returned, how do I retrieve the result?

This should do it:
DialogResult dialogResult = MessageBox.Show("Sure", "Some Title", MessageBoxButtons.YesNo);
if(dialogResult == DialogResult.Yes)
{
//do something
}
else if (dialogResult == DialogResult.No)
{
//do something else
}

DialogResult dr = MessageBox.Show("Are you happy now?",
"Mood Test", MessageBoxButtons.YesNo);
switch(dr)
{
case DialogResult.Yes:
break;
case DialogResult.No:
break;
}
MessageBox class is what you are looking for.

MessageBox.Show(title, text, messageboxbuttons.yes/no)
This returns a DialogResult which you can check.
For example,
if(MessageBox.Show("","",MessageBoxButtons.YesNo) == DialogResult.Yes)
{
//do something
}

The MessageBox does produce a DialogResults
DialogResult r = MessageBox.Show("Some question here");
You can also specify the buttons easily enough. More documentation can be found at http://msdn.microsoft.com/en-us/library/ba2a6d06.aspx

Use:
MessageBoxResult m = MessageBox.Show("The file will be saved here.", "File Save", MessageBoxButton.OKCancel);
if(m == m.Yes)
{
// Do something
}
else if (m == m.No)
{
// Do something else
}
MessageBoxResult is used on Windows Phone instead of DialogResult...

You can also use this variant with text strings, here's the complete changed code (Code from Mikael), tested in C# 2012:
// Variable
string MessageBoxTitle = "Some Title";
string MessageBoxContent = "Sure";
DialogResult dialogResult = MessageBox.Show(MessageBoxContent, MessageBoxTitle, MessageBoxButtons.YesNo);
if(dialogResult == DialogResult.Yes)
{
//do something
}
else if (dialogResult == DialogResult.No)
{
//do something else
}
You can after
.YesNo
insert a message icon
, MessageBoxIcon.Question

#Mikael Svenson's answer is correct. I just wanted to add a small addition to it:
The Messagebox icon can also be included has an additional property like below:
DialogResult dialogResult = MessageBox.Show("Sure", "Please Confirm Your Action", MessageBoxButtons.YesNo, MessageBoxIcon.Question);

if (MessageBox.Show("Please confirm before proceed" + "\n" + "Do you want to Continue ?", "Confirm", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
//do something if YES
}
else
{
//do something if NO
}

Try this:
if (MessageBox.Show("Are you sure", "Title_here", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
{
Do something here for 'Yes'...
}

This simple code worked for me. I grabbed it from MSDN here:
https://social.msdn.microsoft.com/Forums/en-US/d1092a96-96b0-4ca4-b716-0c8e55e42ee9/how-can-i-manage-messagebox-result-?forum=Vsexpressvcs
if (System.Windows.Forms.MessageBox.Show
("Are you sure you want to add the audit?", "Add",
System.Windows.Forms.MessageBoxButtons.YesNo,
System.Windows.Forms.MessageBoxIcon.Question)
==System.Windows.Forms.DialogResult.Yes)
// Do stuff after 'YES is clicked'
else
// DO stuff after 'NO is clicked'

dynamic MsgResult = this.ShowMessageBox("Do you want to cancel all pending changes ?", "Cancel Changes", MessageBoxOption.YesNo);
if (MsgResult == System.Windows.MessageBoxResult.Yes)
{
enter code here
}
else
{
enter code here
}
Check more detail from here