引用thisMSDNpage(或有关此事的任何相关页面),它指出:Whenyouchangethefocusbyusingthekeyboard,focuseventsoccurinthefollowingorder:EnterGotFocusLeaveValidatingValidatedLostFocus但是,当您使用鼠标引发事件时,顺序会发生变化!WhenyouchangethefocusbyusingthemouseorbycallingtheFocusmethod,focuseventsoccurinthefollowingorder:EnterGotFocusLostFoc