嵌套控件不显示工具提示

Question

我有以下一段代码，除了一个实例外，它在所有实例中都运行良好。

private void tbxLastName_EditValueChanging(object sender, DevExpress.XtraEditors.Controls.ChangingEventArgs e)
{
    GetRemainingChars(sender);
}

public void GetRemainingChars(object sender)
{
    var control = sender as TextEdit;
    var maxChars = control.Properties.MaxLength;
    tipCharacterCounter.Show(control.Text.Length + "/" + maxChars, this, control.Location.X, control.Location.Y - control.Height);
}

我只是从任何文本框重复此过程。不幸的是，我有一个更复杂的控件，我无法让它工作。 Event 部分看起来像这样 -->

private void memDirectionsToAddress_Popup(object sender, EventArgs e)
{
    MemoExPopupForm popupForm = (sender as DevExpress.Utils.Win.IPopupControl).PopupWindow as MemoExPopupForm;
    MemoEdit meDirections = popupForm.Controls[2] as MemoEdit;
    meDirections.EditValueChanging += new DevExpress.XtraEditors.Controls.ChangingEventHandler(meDirections_EditValueChanging);
}

void meDirections_EditValueChanging(object sender, DevExpress.XtraEditors.Controls.ChangingEventArgs e)
{
    GetRemainingChars(sender);
}

我不明白的是，如果我用更新标签替换 tipCharacterCounter 部分，它就可以正常工作。就像工具提示被隐藏或其他什么，但我尝试提供 Show() 不同的点但无济于事。

有想法吗？

Answer 1

您使用的是哪个版本的 DXPerience？我已经使用 DXperience 10.1.5 尝试了以下代码，它在这里工作正常：

private void memoExEdit1_Popup(object sender, EventArgs e) {
    MemoExPopupForm popupForm = (sender as DevExpress.Utils.Win.IPopupControl).PopupWindow as MemoExPopupForm;
    MemoEdit meDirections = popupForm.Controls[2] as MemoEdit;
    meDirections.EditValueChanging += new DevExpress.XtraEditors.Controls.ChangingEventHandler(meDirections_EditValueChanging);
}

void meDirections_EditValueChanging(object sender, DevExpress.XtraEditors.Controls.ChangingEventArgs e) {
    GetRemainingChars(sender);
}

public void GetRemainingChars(object sender) {
    TextEdit control = sender as TextEdit;
    int maxChars = control.Properties.MaxLength;
    tipCharacterCounter.ShowHint(control.Text.Length + "/" + maxChars, control, ToolTipLocation.RightBottom);
}