我们如何根据在 C# winform 的另一个组合框中选择的值启用 combobox

Question

how can we enable combobox based on the value selected in another combo box in C# winform.

I have two combo box as shown below. Need to enable second combo box based on the value selected in first combo box. Note that the first value of combobox1 is defualt value and combobox 2 needs to be disabled but if any other value is selected the combobox 2 should be enabled.

enter image description here

Answer 1

Say you have 2 combo boxes, combobox1 and combobox2

Start by adding an event listener to combobox1 . From there, you can check whether your option has been selected

        comboBox1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                //
                // Get the source of the component, which is our combo
                // box.
                //
                JComboBox comboBox = (JComboBox) event.getSource();

                Object selected = comboBox.getSelectedItem();
                if(selected.toString().equals("item1"))
                    combobox2.Enabled = True;
                else if(selected.toString().equals("item2"))
                    combobox2.Enabled = False;


            }
        });