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Start and Immediately Close application without showing Form

I have a very simple GUI application in C# and there is some codes in Form Load function. I just want to start and close the application without showing Form for running those codes in form load function.
How to do it?

If you don't want to show a form, you should move your code to the Main() method and get rid of the form.

Or you could try to create a service which contains no GUIs
http://msdn.microsoft.com/en-us/library/zt39148a%28v=vs.110%29.aspx

form.Opacity = 0;
I am not sure if this is what you want.
EDIT: - This will keep form opaque and you can run and close it when an event occur.

how to display textBox control in MessageBox?

Any idea how to display textBox control in MessageBox.
I'm working on winforms projcet c#.
Thank you in advance.

You can't. MessageBox is a special container designed to only show a message and buttons. Instead, you can create your own Form with whatever controls you want, and use .ShowDialog() on it.

You can simply add an Input box from VB.NET into your C# project.
First add Microsoft.VisualBasic to your project References, then use the following code:
string UserAnswer = Microsoft.VisualBasic.Interaction.InputBox("Your Message ", "Title", "Default Response");
And that should work properly.

It will be better to add a new Form in you application which you can customize the way you want.
and just call it from where ever required.

you could create a classic win form that looks like a message box and opening it as a modal form
perhaps using Form.ShowDialog
more info at
http://msdn.microsoft.com/en-us/library/c7ykbedk.aspx

You cannot customise the MessageBox, its better you use a popup designed using Windows Form separately and use its instance to invoke.
customPopup popup = new customPopup();
popup.ShowDialog();
Place your controls on the popup form and set their access modifiers to public if you want to access the textboxes or labels etc in your previous form.
customPopup popup = new customPopup();
popup.msgLabel.Text= "Your message";
popup.ShowDialog();

As I know there is no way to do that.
You can create a winform change it's style to look like a MessageBox and add your own controls.

Yes, as krillgar mentioned,you should create your own form. And
1. Encapsulate the form in a static class or function, so you may just call MyMessageBox.Show().
2. The textbox should have readonly=true, so the end users won't be able to change the text displayed, while they could select text and copy to clipboard.
Regarding to item 2, I believe many Windows build applications and MS Office use such approach.

using Microsoft.VisualBasic;//add reference
var Password = Interaction.InputBox("Message", "Title" ,"information in textbox", -1,-1);
In the variable "password" it receives the information that is entered from the text box.
Remember to add the reference "Microsoft.VisualBasic" in the solution explorer

Solution in here, you can create windows form and design it, set form is dialog, when you call form, it is auto show. In form you design, you set value some parameter static where other class in project, but you should set when you close form design that, OK, come back form init call show dialog, you create interval call when have == null return call, when != null you stop call back and using parameter in class static it !

c# second form closing after initialisation

I am trying to create a simple c# application (my first attempt at c# so please be kind). I've created a form with a textbox to capture an "auth code", which is then validated and then a webclient fetches an xml file passing this auth code in to the request. The data sent back is parsed e.c.t.
What i want to do is once the xml comes back and ive done my checks to valid it is all fine. I want to close the first form and load up a second form where i will programmatically add the form components needed to display the xml data in a pretty format.
My problem is that im unable to get the second form to stay open (im no doubt invoking the second form in the wrong manner). Here's what i have:
// close current form
this.Close();
//open new form
xmlViewForm xmlView = new xmlViewForm();
xmlView.Show();
I'm sure you've spotted the mistake im making by now. but just to state the obvious for the sake of completeness, it closes the first form, opens the second, and then immediately the program exits (the second form flashes up for a second obviously).
I've tried a few things but none of them work (including using Application.Run(new xmlViewForm()); instead of instantiating the class and using the show() method. Obviously you know that doesn't work, and now i do too, although i dont understand c# even remotely enough to work out why.
Thanks for any help :)

The first thing that came to mind is that you are closing the form that you opened by calling Application.Run(new MyForm()) or something similar. This form has special significance; it is the "main form" of the application, and when closed, it signals to the application that the user wants to close the entire program, no matter how many other windows are open.
There are two possible fixes. First, and easiest, is simply to Hide() the form you don't want visible instead of calling Close() on it. Though invisible, it's still running, so the application doesn't close.
The second solution is to define a custom "application context" that should be run instead of the "default context" that is created by specifying a main form to watch. You do this by deriving a custom class from System.Windows.Forms.ApplicationContext. With this context specified, you can use it to control termination of the application based on something other than closure of the main form. Example code that launches two "main forms" and keeps track of whether both are still active can be found at the MSDN page for the class. You can do something similar by specifying Load and Close handlers for the main form, then passing them to the child form when the main form instantiates it, thus keeping a count of "open" forms, and closing out the full application when that number is zero. Just make sure the child form loads before closing the main form by calling childForm.Show() before this.Close().

You can not open the second form after closing the main form.
Do this:
//open new form
xmlViewForm xmlView = new xmlViewForm();
xmlView.Show();
// hide current form
this.Hide();
Main form can not be closed because it's the parent form. The child form will never show up if you close the main form.
Or change the xmlViewForm to main form by editing Program.cs file
Application.Run(new XmlViewForm());
Then you can easily call the other form first at the time of loading and close it as you please:
private void XmlViewForm_Load(o, s)
{
// hide current form, and this will remain hidden until the other form is done with it's work
this.Hide();
//open the other form
TheOtherForm _theOtherForm = new TheOtherForm();
_theOtherForm.Show();
}
private void TheOtherForm_Closed(o, s)
{
// show current form
this.Show;
}

C# WinForms Wait on form to proceed

I'm tired and hungry, so I might of missed it, but from what I can see no existing post covers this...
I'm writing a plugin for an application. My plugin loads a form to get some data specifically, it uses the webcam to scan for a barcode. Once it's found a barcode, the form hides itself (incase it's needed again later). This is how I currently call the form that does the barcode work:
string readData = null;
if (eye == null)
{
System.Windows.Forms.Application.EnableVisualStyles();
eye = new CamView();
}
eye.Show();
if (eye.found)
{
readData = eye.readData;
}
return readData;
So, my problem is that eye.show() doesn't block. It makes the form appear and carries right on before there's a chance for the barcode to appear. I imagine I need to use some form of threading or locking, but my crude attempts to do so have just frozen the interface completely.
The "eye" form is basically just a viewfinder for the webcam, and relies on the camera_OnImageCapture event to make it do it's image checks for the barcode.
Is there an elegant way to make the application calling the plugin wait for the form to finish? Or do I just need to add an accept button to the "eye form?"
Cheers. And humble apologies if this is in anyway a repost.

.ShowDialog();
http://msdn.microsoft.com/en-us/library/c7ykbedk.aspx
"You can use this method to display a modal dialog box in your application. When this method is called, the code following it is not executed until after the dialog box is closed."

You are on the right track. You change the code to show CamView as a modal dialog but do no add an Accept button. Instead change camera_OnImageCapture to close the dialog.

Showing Multiple Instances Of Same Form?

I'm having some serious issues with a WinForm application that I'm working on.
Currently, I'm using Form1.ShowDialog(); to display a form. This code is contained in a background worker that looks for changes in a database. Using Form1.ShowDialog(); only allows 1 form to open at a time, even if there are multiple changes to the database. What I want to have happen is for multiple forms to open at once if there is more than one change in my database.
When I use Form1.Show();, the application blows up. For some reason, the Show() method makes the forms not display properly (all the elements in the form are missing).
Is there anything I can do to make my code work the way I want it to?
Edit: here's a code snippet
//result is a linq result
foreach (var row in result)
{
Form1 Form = new Form1();
Form.ShowDialog();
}

After a first look, I can tell you this:
Showdialog can't work the way you intend: this very method makes the owner inactive until the dialog is closed. In your case, the loop will pause at the first showdialog, then resume when you close the form, opening a new one and so on until the loop is finished.
As for the "show" problem, creating empty forms, I need more information. The rest of the code and the exception(s) you're getting.

Two points from the top of my head:
1) To open more then one form , use non modal (modeless) method (i think
the show() method). see for example http://msdn.microsoft.com/en-us/library/39wcs2dh.aspx
2) I am not sure you can call UI related method from a non UI thread. You might want to send an event to your UI thread from the worker thread and the UI thread will call the show method