在foreach循环中删除列表中的项目c#

Question

如果我在 foreach 循环中使用一个项目并且我不能使用该项目，它必须删除当前在 foreach 循环中的项目。

这是我现在拥有的代码：

foreach (Line line in linelijst)
{
    try
    {
        if (line.ActorIndex() == 0)
        {
            line.setStartPoint(actorenlijst[0].getLinePoint()); //if actorenlijst[0] doesn't excist it has to delete the current line
        }
        if (line.ActorIndex() == 1)
        {
             line.setStartPoint(actorenlijst[1].getLinePoint()); //if actorenlijst[1] doesn't excist it has to delete the current line
        }
        if (line.ActorIndex() == 2)
        {
             line.setStartPoint(actorenlijst[2].getLinePoint()); //if actorenlijst[2] doesn't excist it has to delete the current line
        }
        Point start = line.getStartPoint();
        Point end = line.getEndPoint();
        Pen lijn = new Pen(Color.Black, 1);
        graphics.DrawLine(lijn, start, end);
    }
    catch
    {
         //delete current line from the list
    }
}

感谢您有兴趣帮助其他人:)

Answer 1

尝试为需要删除的项目创建另一个临时列表，然后当您完成循环时，您可以删除临时列表中的项目。

List<Type> temp = new List<Type>()
foreach(item in mainList)
{
   if (item.Delete)
   {
      temp.Add(item);
   }
}

foreach (var item in temp)
{
   mainList.Remove(item);
}