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C# Tabcontrol messed up my form

I had a form made up with buttons, textboxes, and labels. Then I decided to see if I could use tab control because I wanted to add other buttons but I didn't want them to be on the same page. So I cut all my buttons and textboxes and labels and I paste the tabcontrol. Then I paste all of the buttons and stuff back on in tab1. So before I moved on to making buttons I decided to test run the program. I got a page that came up and said nullreferenceexeption was unhandled. When I tried clicking on one of my button, I saw that there was no code inside it and it went from
private void Button1_Click(object sender, EventArgs e)
to
private void Button1_Click_1(object sender, EventArgs e)
Then the errors kept coming up. Now I just want to make my form the way it was before but even though I deleted the tabcontrol, when I click my buttons they still have the _Click_1 thing. Please tell me how I can fix this. I am new to C# so try to explain it simply.
And if you can, tell me how I can add the tabcontrol thing without messing up my entire program.
Also is there a way I could like roll back changes for a day or 2 in visual studio ultimate? Please get back as soon as possible I'm ripping my hair out I can't lose the program I've been working on for 2 weeks.

You can fix most of these problems, but it's going to take a bit of work. For each button, open the properties tab and go to the events section, find the event Click and click once in the text field. You should see a drop down arrow, click that arrow and look at the list. Find the event you expect the button to fire and click on it (Hint : it doesn't have _1 at the end)

Tab Control Shares The same buttons Winform

I wonder If it is possible to have fixed number of buttons that is shared by different tab pages. However I don't know how to implement this. Do you guys have any idea.
Heres a screenshot of my gui so that all of you can have a clearer view of what I meant.
I want that that the list of Customers, Reservations, and Check In/out will share the buttons search, edit, delete and refresh.
Is it possible? or should I create diff buttons for every tabpage?
is it correct if i do:
private void buttonSearch_Click(object sender, EventArgs e)
{
if(tabpage.SelectedIndex == 1){ then perform action..}
if(tabpage.SelectedIndex == 2) {then perform action...}
}

You could put the buttons in a User Control, add some events to the User Control (e.g. SearchClicked, EditClicked, etc.). Put the user control outside of the tabcontrol.
Then when you change tabs (TabIndexChanged), remove event handlers from the previous tab, and add event handlers for the new tab:
private void tabControl_TabIndexChanged(object sender, EventArgs e)
{
UserControl1.EditClicked -= OldEventHandler;
UserControl1.EditClicked += NewEventHandler;
}

Yes, you can change the .Parent property of the buttons at runtime - but wouldn't it be better to just move the buttons outside the tab control?

I feel you should create different buttons for every tab page as each one operates on a different entity. If there is only one set of buttons then you will have to first check which tab page is selected and then do the operation. So you will have one big method doing lots of things.
Plus there would be extra UI code that you will have to write to move the buttons when a tab page is selected.
With different buttons you will have highly cohesive and loosely coupled code. Better design. More maintainable and manageable. Less code.

Where does tab goes?

I am working on winform project. At runtime when I am moving through different controls through tab key ; after one button my tab disappears for 2 clicks. I tried all things to fix this. I set tabstop=false for all contols in winform but still I am getting same problem.
Then I decided to add following code:
Control nextControl = this.GetNextControl(this.guipnlReportPatientMeasurementDetails.Controls[10], true);
where GetNextControl property gets the name of the control where my control will go after pressing tab key and Controls[10] is the button. So where should I place above piece of code so that I would get the name of next control. Should it be in button_click event or somewhere else ?
Guys please suggest.

You should set TabIndex property for each control according to the Tab order you want to impose (you can set it through designer).
Set TabStop = false only for those controls you want to exclude from Tab selection.
There's also a useful button that shows TabIndexes on the form:

You are digging yourself a hole. Find out what the real problem is, there's some kind of control that is either off the window or doesn't properly indicate the focus. If you have no clue what control that might be then add a timer and a label. Set the timer's Enabled property to True, Interval to 200. Write the Tick event like this:
private void timer1_Tick(object sender, EventArgs e) {
if (this.ActiveControl == null) label1.Text = "No control?";
else label1.Text = this.ActiveControl.Name;
}
That tells you where the tab goes.

I would first try to fix the tab order on the window before resolving to using this code. Did you do that?

C# Can I make a picturebox that exists on tab A show on tab B? (winform)

I have a C# winform app that has a tab control, I have a picturebox on tab A and would like the very same picturebox to appear on tab B. Can this be done?
Thank you
Alison

Simply add the picture box to the second tab..
tabControl1.TabPages["tabB"].Controls.Add(pictureBox1);
This will remove the picture box from tab A and put it, as is, inside tab B.
Edit: you can have this code in the SelectedIndexChanged of the tab control to have the picture box jump between the tabs:
private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
{
tabControl1.TabPages[tabControl1.SelectedIndex].Controls.Add(pictureBox1);
}

I'm affraid you can't
I though I could do it once by overriding the designer.cs file to add the control to both tabs and only got an error.

You can either make two pictureboxes, and keep them synchronized, or...
You can get the event to the tab control, OnTabChanged or something like that. If the tab is Tab A or Tab B, just move the picture box to that tab. I'm not exactly sure how you would do that, but I assume you would just remove it from whereever it is currently, and put it in the right place.

Suppress Automatic Textbox Selection on Windows Forms Form.Show()

I have an application where I am trying to mimic the "soft description" textboxes like those found for the tags and title locations on this site.
The way I've done this is essentially to create my textbox, and depending on what happens when the mouse pointer enters or leaves the control, it updates the content of the textbox to get the effect.
The problem is what when my form is first shown, the mouse cursor immediately jumps into the first textbox, which removes the title telling the user what the textbox is for.
If I turn off AcceptTab on the textbox, then everything works as expected, but the user loses the ability to tab into the textbox.
Is there a way to turn off this automatic selection of the textbox?

Could you this.Focus() on the form itself, or on some label control?

Bit late but a perfect solution is to select the form on load of form.
Adding this line to the constructor will give the expecting result.
this.Select();
But while using multi thread controls like OpenFileDialog if u want to unfocus/deselect text-box this.Select() was not working so I selected a button in the form using.
button1.Select();

The TabIndex property controls what order things will tab in, and on load, focus goes to the first control (ordered by TabIndex) that has AcceptTab as true. You can change the ordering so that the control that you want the user focus to start in is lowest (and have tabs work cycle through controls as you'd expect).
Alternatively, as Jason suggested, you could simply call Focus() on whatever control or the form itself in the FormLoad event.

I used a variant on Jason's technique. First, I created a dummy textbox with tabindex 0. That way, when the form is shown, that textbox will be selected. Next, I made the dummy textbox have zero width, so that it has no visible component.
However, once the form is loaded, I don't want the user to be able to tab over to the "nonexistant" textbox. Therefore, I added these two bits:
//These functions prevent the textboxes from being implicitly selected.
private void dummyBox_Leave(object sender, EventArgs e)
{
dummyBox.TabStop = false;
}
private void Main_Enter(object sender, EventArgs e)
{
dummyBox.TabStop = true;
dummyBox.Select();
}
Where Main is the name of my form.
Hope this helps someone.
Billy3