如何通过单击制表符将控件集中在其父窗体的面板上添加的窗体中

Question

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?

Answer 1

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

Answer 2

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..