winform c# : insert another form control after an event in c#

Question

what i want to do is actually more complex than this. but the principal is this..

i want to insert another control like text box into an existing form, but after some event like a click of a button.

the new text box would be inserted into the same form( main form)

what i have got is. i created as usual windows form application, and then put a button there. then in the same project i add new form window. and put a text box there.

and in the event of button click, i put

form2.showdialog();

it works but it shows as a dialog box.

but what i want is that the text box shows up on the main form, not in the new form as a dialog box.

thank for the asap reply.

Answer 1

private void button1_Click( object sender, EventArgs e )
{
    TextBoxt text = new TextBox( );
    // set location and other properties
    this.Controls.Add( text );
}

Answer 2

If you need only a single text box sometimes visible, sometimes not, I suggest just to add it in the designer and toggle the TextBox.Visible property in the event.

If you need to dynamically add several controls, I suggest to use the TableLayoutPanel and add controls to it at runtime.

Finally you could just add the control to the main form with something like the following.

Control textBox = new TextBox();

// Set the location, size, and all the other properties.

this.Controls.Add(textBox);

This way you have the largest freedom to build your form, but accept for very simple cases it is non-trivial to get a reasonable layout.

Answer 3

hei. i am able to solve it by using list (generic list)

in main form, create a private variabel List and create public method to get the variable.

in main form, create a public method to add by looping through the list.

so in the new class i have created, in one of the method i put the creation of the form. and into here i pass the listcontrol.

and then put all the control variable into the list control.

and on a click of a button, i call the class method, and then it will automatically draw the form controls that created by the class.

private List<Control> listControl;

        public windowForm()
        {
            InitializeComponent();
            listControl = new List<Control>(); 
        } 

        public List<Control> ListControl {
            get { return listControl; }
        }

        public void addControl() {
            if (this.listControl.Count() > 0) {
                foreach (Control c in listControl)
                {
                    Console.WriteLine("adding "+c.Name);
                    this.panel1.Controls.Add(c);
                }
            }
        }

        public void removeControl() {
            if (this.listControl.Count() > 0)
            {
                foreach (Control c in listControl)
                {
                    Console.WriteLine("removing " + c.Name);
                    this.panel1.Controls.Remove(c);
                }
            }
        }

and for the new class i have created, i put

this.groupbox_VectorAddition = new System.Windows.Forms.GroupBox();
            this.txtBox_v1a = new System.Windows.Forms.TextBox();
            this.txtBox_v1b = new System.Windows.Forms.TextBox();
            this.txtBox_v1c = new System.Windows.Forms.TextBox();
            this.txtBox_v2c = new System.Windows.Forms.TextBox();
            this.txtBox_v2b = new System.Windows.Forms.TextBox();
            this.txtBox_v2a = new System.Windows.Forms.TextBox();
            this.lbl_Vector1 = new System.Windows.Forms.Label();
            this.lbl_Vector2 = new System.Windows.Forms.Label();
            this.btn_countAddVector = new System.Windows.Forms.Button();
            this.btn_resetVector = new System.Windows.Forms.Button();
//put everything into the panel
            form.ListControl.Add(btn_resetVector);
            form.ListControl.Add(btn_countAddVector);
            form.ListControl.Add(lbl_Vector2);
            form.ListControl.Add(lbl_Vector1);
            form.ListControl.Add(txtBox_v2a);
            form.ListControl.Add(txtBox_v2b);
            form.ListControl.Add(txtBox_v2c);
            form.ListControl.Add(txtBox_v1c);
            form.ListControl.Add(txtBox_v1b);
            form.ListControl.Add(txtBox_v1a);

            form.ListControl.Add(groupbox_VectorAddition);