How to open different forms with multiple radio button in C# GUI

Question

I have created a simple form on which I have given two radio buttons & 1 button. So by selecting either of the radio buttons I want to open another two forms respectively on button click.

I have tried but it opens only 1 form by selecting any of the radio button, So any help????

Sam Hobbs · Answer

I assume you have three forms; one is the form (Form1 maybe) that has the radio buttons and a button. The other two forms (Form2 and Form3 maybe) are the other forms that you want to show, depending on which radio button is selected. Then in the Form1 button's click event do something like: Form f = null; if (radioButton1.Checked) { f = new Form2(); f.ShowDialog(); } else if (radioButton2.Checked) { f = new Form3(); f.ShowDialog(); } else MessageBox.Show("Nothing selected");

Nits · Answer

private void button1_Click(object sender, EventArgs e) { Form1 f1 = null; if (radioButton1.Checked) { Form2 f2 = new Form2(); f2.Show(); this.Hide(); } else if (radioButton2.Checked) { Form3 f3 = new Form3(); f3.Show(); this.Hide(); } else { MessageBox.Show("SelectSomething"); }

Zoran Horvat · Answer

You can implement it like this: private void btnPopulate_Click(object sender, EventArgs e) { Form frm = null; if (radioButton1.Checked) { frm = new Form2(); } else if (radioButton2.Checked) { frm = new Form3(); } if (frm != null) { frm.Owner = this; frm.FormClosed += new FormClosedEventHandler(ChildFormClosed); this.Hide(); frm.ShowDialog(); } } void ChildFormClosed(object sender, FormClosedEventArgs e) { Form frm = (Form)sender; frm.Owner.Show(); } Note that this piece of code handles FormClosed event on child form to show current form back once the child is closed. Zoran

Zoran Horvat · Answer

Try like this: Form frm1 = new Form(); frm1.Text = "One"; Form frm2 = new Form(); frm2.Text = "Two"; Form frm = null; if (radioButton1.Checked) frm = frm1; else if (radioButton2.Checked) frm = frm2; if (frm != null) frm.ShowDialog(); Zoran

Zoran Horvat · Answer

Nits, Please don't forget to tick "This is correct answer" in post which has helped you solve the problem. Thanks, Zoran

Nits · Answer

If I made the question little confusing then I m sorry for that. Actually I wanted to show another form on selecting 1 of the radiobutton & hide the current form & I was able to do that after seeing zoran sir code & making very small changes in that & it work for me. Thank you every 1 who replied to my question thanks a lot. But now how to display the msg label so that 1 can see its the 1st radio button & thats 2nd radio button???

Sam Hobbs · Answer

Note that I asked you if you " understand the difference between showing a form using the Show method and showing a form using the ShowDialog method " because if you use ShowDialog then it would be easier to do the hide/show in the main form. As best as I understand the question, Zoran is assuming you want to use ShowDialog but in your sample code you are not using ShowDialog.

Sam Hobbs · Answer

You need to think about what you need to do. I doubt that you really want to open a form each time you select a radio button. That is definitely not what most Windows programs do. Most programs open a form when a push button is pushed or a menu item is selected; sometimes the form that is opened depends on which radio button of a group is selected. Do you understand the difference between showing a form using the Show method and showing a form using the ShowDialog method?

Nits · Answer

OK ill change my question a bit. How to open a existing form in a application on selecting a radio button & hide current form?? :-)

Sam Hobbs · Answer

The problem is likely that you are putting the code in the wrong place. You need to put Zoran's code in the button click handler, so that the code is executed when the button is clicked and only when it is clicked. Do you understand?

Vulpes · Answer

Are these two forms you're opening on the button click of the same class as the form containing the radiobuttons and the button? If they are, then the new instances of these forms will inevitably contain the radiobuttons and the button. If you don't want these to appear, then you need to add a new form class to your project, create an instance of it and show that. Alternatively, if you just want a blank form, except the title, create an instance of the base Form class - as Zoran did in his code - and show that.

Zoran Horvat · Answer

I don't understand your question. This code is opening the form selected by radio buttons. Zoran

Nits · Answer

sir its opening the form on selecting the radio button but its also showing the 2 radio buttons & the button! Now what 2 do???

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