Question

I have this simple code in my DevExpress LookUp control (should be identical with a normal combobox)

private void lookUpUsers_EditValueChanged(object sender, EventArgs e)
{
    lookUpRolesPréÉdit.EditValue = null;
}

private void lookUpRolesPréÉdit_EditValueChanged(object sender, EventArgs e)
{
    lookUpUsers.EditValue = null;
}

The problem is that when I select a value in lookUpUsers, is resets the other lookup which then resets lookUpUsers. So when I pick a value, both combobox become null. What I want is that when you pick a value in combobox 1, combobox 2 resets its value.

Answer 1

How about this:

private void lookUpUsers_EditValueChanged(object sender, EventArgs e)
{
    if(lookUpUsers.EditValue != null)
        lookUpRolesPréÉdit.EditValue = null;
}

private void lookUpRolesPréÉdit_EditValueChanged(object sender, EventArgs e)
{
    if(lookUpRolesPréÉdit.EditValue != null)
        lookUpUsers.EditValue = null;
}