/// <summary>
/// 下一张
/// </summary>
private void NextPic()
{
_currentIndex = ImgUrl.FindIndex(v => v.ChatIndex == _chatIndex);
if (_currentIndex == -1)
{
return;
}
if (_currentIndex >= ImgUrl.Count - 1)
{
_currentIndex = ImgUrl.Count - 1;
TipsText = "已经是最后一张";
TipsVisibility = Visibility.Visible;
Application.Current.Dispatcher.Invoke(Timing);
}
else
{
_currentIndex++;
_chatIndex = ImgUrl[_currentIndex].ChatIndex;
var img = ImgUrl[_currentIndex];
if ((img.IsBurn == burnMsg.isBurnMsg.yesBurn && img.IsRead == burnMsg.IsReadImg.notRead) || (img.IsRead == burnMsg.IsReadImg.read && img.IsEffective == burnMsg.IsEffective.NotEffective))
{
NextPic();
}
else
{
_oldIndex = _currentIndex;
UpdateImage();
}
}
}
/// <summary>
/// 上一张
/// </summary>
private void PrePic()
{
_currentIndex = ImgUrl.FindIndex(v => v.ChatIndex == _chatIndex);
switch (_currentIndex)
{
case -1:
return;
case 0:
TipsText = "已经是第一张";
TipsVisibility = Visibility.Visible;
Application.Current.Dispatcher.Invoke(Timing);
break;
default:
_currentIndex--;
_chatIndex = ImgUrl[_currentIndex].ChatIndex;
var img = ImgUrl[_currentIndex];
if ((img.IsBurn == burnMsg.isBurnMsg.yesBurn && img.IsRead == burnMsg.IsReadImg.notRead) || (img.IsRead == burnMsg.IsReadImg.read && img.IsEffective == burnMsg.IsEffective.NotEffective))
{
PrePic();
}
else
{
_oldIndex = _currentIndex;
UpdateImage();
}
break;
}
}