/// <summary>
/// 把选中的提示放到输入框中，并关闭提示
/// </summary>
private void UseIntelliThenClose()
{
if (intelliLst.SelectedItem != null)
{
string tagName = IntelliUtils.EscapeTagName(
(intelliLst.SelectedItem as IntelliItem).Name);
int prefixLen = IntelliUtils.ExtractPrefix(tagSearchBox.Text).Length;
string textWithoutPrefix = tagSearchBox.Text.Substring(
0, tagSearchBox.Text.Length - prefixLen);
tagSearchBox.Text = textWithoutPrefix + tagName + "\" ";
tagSearchBox.CaretIndex = tagSearchBox.Text.Length;
}
intelliPopup.IsOpen = false;
}