How to Disable comboBox if other comboBox is selected (C#)

Question

Is there anyway to disable a combobox if a different combobox has some sort of text or value in it. I have tried a couple things and can't seem to get it to work.

Below is Example

Answer 1

Use the SelectedValueChanged event of combobox1 to check for the selected values. Disable or enable combobox2 based upon that.

private void combobox1_SelectedValueChanged(object sender, Eventargs e)
{
    if (combobox1.SelectedValue == myDisableValue)
        combobox2.Enabled = false;
    else
        combobox2.Enabled = true;
 }

Answer 2

您可以处理两个组合框的SelectedValueChanged事件，如果任何一个组合具有所需的值，请禁用另一个

Answer 3

You can take a look here

http://social.msdn.microsoft.com/Forums/en-US/sqlreportingservices/thread/04f92630-8c66-4e9d-8c95-22716d86177f

Answer 4

Something similar to this, only set whatever property you want, or don't clear it, or whatever. (test combos were not data bound)

    public partial class Form1 : Form
{
    bool fireEvents = true;
    public Form1()
    {
        InitializeComponent();
    }

    private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (fireEvents) doCheck(sender, e);
    }

    private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (fireEvents) doCheck(sender, e);
    }

    private void doCheck(object sender, EventArgs e)
    {
        fireEvents = false; // because we don't have a way to cancel event bubbling
        if (sender == comboBox1)
        {
            comboBox2.SelectedIndex = -1;
        }
        else if (sender == comboBox2)
        {
            comboBox1.SelectedIndex = -1;
        }
        fireEvents = true;
    }

}