Comboxbox controls, Checklistbox controls, and ListBox controls are developed together

First step: Create a WinForm form application and lay out the layout as shown.

Step two: Set properties for Comboxbox controls, Checklistbox controls, and ListBox controls and Button controls

Step three: Declare two private arrays in the form class in your code.

Private string[] Names;private string[] nums;

Fourth step: Initialize the array in the form class and do a preparatory work.

private void Form1_load_1 (object sender, EventArgs e)        {            names = new string[] {"Jason", "Jack", "Jay", "Baby"};
   nums = new string[] {"12345", "21345", "32145", "42135"};            THIS.CHECKEDLISTBOX1.ITEMS.ADD (names);            This.comboBox1.SelectedIndex = 0;        }

Fifth step: Add a Trigger event for button buttons.

private void Button1_Click (object sender, EventArgs e)        {            //count is used to get the number of selected in the CheckedListBox            int Count = This.checkedListBox1.CheckedItems.Count;            if (This.checkedListBox1.Items.Count = = 0) return;            If CheckedListBox one is not selected if            (This.checkedListBox1.SelectedIndex = =-1)            {                MessageBox.Show (" Please select the item to add in the Checklistbox ");                return;            }            Adds the selected item to the listbox for            (int i = 0; i < Count; i++)            {                This.listBox1.Items.Add ( This.checkedlistbox1.checkeditems[i]);            }            MessageBox.Show ("The selected item has been moved to the ListBox");        

Sixth step: Add a Trigger event for the ComboBox control and put the array into CheckedListBox when the value in the control is a name.

<summary>////        This method is when a field is selected in the ComboBox and the selection for this field is displayed in Checklistbox///        </summary>//        <param name= "Sender" ></param>//        <param name= "E" ></param>        private void combobox1_ SelectedIndexChanged (object sender, EventArgs e)        {            combobox cb = (combobox) sender;            Switch (CB. SelectedIndex)            {case                0:                    this.checkedListBox1.Items.Clear ();                    This.checkedListBox1.Items.AddRange (names);                    break;                Case 1:                    this.checkedListBox1.Items.Clear ();                    This.checkedListBox1.Items.AddRange (nums);                    break;            }            This.listBox1.Items.Clear ();        }

Seventh step: Run the process.

① Start Interface:

② when you select a value in CheckedListBox and click Submit message:

③ Select the number and select the value in CheckedListBox and click Submit message:

Eighth step: you are done.

Comboxbox controls, Checklistbox controls, and ListBox controls are developed together