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Child form's controls not displaying correctly

I am using an MDI form in which I have given option tool strip menu item as a call to a new child form. On the child form I have some buttons and DataGridView. But when I click the child form option the buttons and DataGridView are not displaying correctly. Provided I have already set the isMdiContainer property to true of MDI form.
The scenario runs successfully when I simply show a form, but the problem occurs when I use the form as a child form. Here is the code which I wrote in a tool strip menu item click:
frm_bank_master myfrm = new frm_bank_master();
myfrm.MdiParent =this;
myfrm.Show();

How to focus a control in a form which is added on a panel of its parent form by tabbing index

I'm working on winforms in c#. I have a form which loads other forms in its panel. Now my child forms have many textboxes.
I want to set focus on one of those textboxes by loading my children forms by setting tab index to zero.
But it isn't happening when i load my children forms. I have taken care of the tab stop properties & i also went through the tabbing order of the forms. But the problem is still there.
When i load children forms from startup it focuses zero indexed control. I guess my problem is that i am loading these forms in a panel of a parent form. Any solution to this problem?

The Windows Forms controls in the following list are not selectable. Controls derived from these controls are also not selectable.
Panel
GroupBox
PictureBox
ProgressBar
Splitter
Label
LinkLabel (when there is no link present in the control)
Focus is a low-level method intended primarily for custom control authors. Instead, application programmers should use the Select method or the ActiveControl property for child controls, or the Activate method for forms.
https://msdn.microsoft.com/en-us/library/system.windows.forms.control.focus.aspx

You can set focus to a control in a form which is added on a panel of its parent form by creating an instance of child form in the parent form and then setting focus to child form controls.
Make an instance of child form:
ChildForm formInstanceName = new ChildForm();
And then you can set the focus property for particular control as:
formInstanceName .controlname.Focus();
And before doing this make sure you add the child form to the respective panel.
Here is the snippet of the code I used:
Form1 childform1 = new Form1();//creating an instance of child form
private void btn_Click(object sender, EventArgs e)
{
Panel2.Controls.Clear();//To clear existing controls on panel
Panel2.Controls.Add(childform1); // To add child form controls on the panel.
childform1 .textbox1.Focus(); //To set focus to control of child form
}
I hope this helps you..

get the splitcontainer context in user control click event

Sir,
I have a split container in which in right panel i have a usercontrol.In the user control i have few buttons like view,new,edit etc.Bottom of that user control a form will open based on what link is clicked on the left side navigation pane. now when i click the user control's view button, i should open a new form below it. how to get the context of splitcontainer in the click event?also if i want to retrieve the form values to save in database when i click the save button in user control, how to do it?

A Click event has a sender parameter, which is the clicked button. You could use the name of the button to resolve which form should be opened.

To get your button in the click event:
Button clickedButton = (Button)sender;
To get the parent of your button (if it was SplitContainer, you'll have to use Parent property 3 times, because the first one will get you your UserControl, second - left panel of the SplitPanel, which doesn't have a Name property, third - your SplitPanel, and 4th, if you want, your form name)
string splitPanemName = clickedButton.Parent.Parent.Parent.Name;
...or you can just get whole SplitPanel object:
SplitPanel currentSplitPanel = (SplitPanel)clickedButton.Parent.Parent.Parent;
...or Form object:
Form currentSplitForm = (Form)clickedButton.Parent.Parent.Parent.Parent;
To do this, you have to be sure of the composition of your Form, so you can get the right controls at the right place.

How to close the current form in a SplitContainer?

I have a user control in my SplitContainer's right panel. A form opens below the user control. Now if i click a button in the user control, that current form should close and a new form should open. How to do this?

You can implement below logic in your app easily:
splitContainer.Panel2.Controls.Remove(myPanel);
splitContainer.Panel2.Controls.Add(myOtherPanel);
which will remove the existing panel from the container and place the other panel. You can extend the same logic to place forms, or separate controls on the container easily.

C# Control Parent

I have a winform project with a tabcontrol and several tabpages.
Within each tabpage there is some unique panel controls. However, when the user interacts with the form in each tab page, I want a generic picturebox to show. So I don't want to create a new picturebox for each tabpage, rather show the same one. Which control should I therefore have as a parent to the picturebox, and how can I change the parent once I drag the control onto the form?
Thanks.

The form has to be the parent. Which is not so easy to get done in the designer, the tab page will suck it in every opportunity it gets. One thing you can do is put it to the left of the tab control and move it in place by changing its Location property in the form's constructor, after the InitializeComponent() call
public Form1() {
InitializeComponent();
pictureBox1.Left = tabControl1.Left + 15;
}