Question

我在一个方法中有一个while循环，该方法应该创建24个动态创建的对象。然而，循环创建3然后停止。

int test = 24;

while (placenum< test)
{
    FlowLayoutPanel name = new FlowLayoutPanel();
    FlowLayoutPanel data = new FlowLayoutPanel();
    FlowLayoutPanel pic = new FlowLayoutPanel();
    int sort = 0;

    while (sort == 0)
    {
        SearchR.Searchrdata.Controls.Add(first);
        first.Margin = new Padding(50, 50, 3, 50);
        first.Size = new Size(320, 320);
        first.BackColor = Color.Azure;
        first.Controls.Add(name);
        name.Size = new Size(320, 22);
        name.Margin = new Padding(0);
        first.Controls.Add(data);
        data.Size = new Size(320, 22);
        data.Margin = new Padding(0);
        first.Controls.Add(pic);
        pic.Size = new Size(320, 276);
        pic.Margin = new Padding(0);
        sort = 1;
        placenum = placenum + 1;
    }

     while (sort == 1)
     {
         SearchR.Searchrdata.Controls.Add(two);
         two.Margin = new Padding(0, 50, 3, 50);
         two.Size = new Size(320, 320);
         two.BackColor = Color.DarkGray;
         two.Controls.Add(name);
         name.Size = new Size(320, 22);
         name.Margin = new Padding(0);
         two.Controls.Add(data);
         data.Size = new Size(320, 22);
         data.Margin = new Padding(0);
         two.Controls.Add(pic);
         pic.Size = new Size(320, 276);
         pic.Margin = new Padding(0);
         sort = 2;
         placenum = placenum + 1;
     }

     while (sort == 2)
     {
         SearchR.Searchrdata.Controls.Add(last);
         last.Margin = new Padding(0, 50, 10, 50);
         last.Size = new Size(320, 320);
         last.BackColor = Color.Bisque;
         last.Controls.Add(name);
         name.Size = new Size(320, 22);
         name.Margin = new Padding(0);
         last.Controls.Add(data);
         data.Size = new Size(320, 22);
         data.Margin = new Padding(0);
         last.Controls.Add(pic);
         pic.Size = new Size(320, 276);
         pic.Margin = new Padding(0);
         sort = 0;
         placenum = placenum + 1;
     }
 };

 return null;

FlowLayoutPanel被称为Searchrdata是其他对象应该被制作的那个，但它只有3并停止。

Answer 1

从外部;循环的末尾删除while。它会在1次迭代后导致循环终止。 P.S它将创建3x24 = 72个总对象而不是24个。

更好的解决方案是：

for( int i = 0; i < 8; i++)
{
    FlowLayoutPanel name = new FlowLayoutPanel();
    FlowLayoutPanel data = new FlowLayoutPanel();
    FlowLayoutPanel pic = new FlowLayoutPanel();

    SearchR.Searchrdata.Controls.Add(first);
    first.Margin = new Padding(50, 50, 3, 50);
    first.Size = new Size(320, 320);
    first.BackColor = Color.Azure;
    first.Controls.Add(name);
    name.Size = new Size(320, 22);
    name.Margin = new Padding(0);
    first.Controls.Add(data);
    data.Size = new Size(320, 22);
    data.Margin = new Padding(0);
    first.Controls.Add(pic);
    pic.Size = new Size(320, 276);
    pic.Margin = new Padding(0);

    SearchR.Searchrdata.Controls.Add(two);
    two.Margin = new Padding(0, 50, 3, 50);
    two.Size = new Size(320, 320);
    two.BackColor = Color.DarkGray;
    two.Controls.Add(name);
    name.Size = new Size(320, 22);
    name.Margin = new Padding(0);
    two.Controls.Add(data);
    data.Size = new Size(320, 22);
    data.Margin = new Padding(0);
    two.Controls.Add(pic);
    pic.Size = new Size(320, 276);
    pic.Margin = new Padding(0);

    SearchR.Searchrdata.Controls.Add(last);
    last.Margin = new Padding(0, 50, 10, 50);
    last.Size = new Size(320, 320);
    last.BackColor = Color.Bisque;
    last.Controls.Add(name);
    name.Size = new Size(320, 22);
    name.Margin = new Padding(0);
    last.Controls.Add(data);
    data.Size = new Size(320, 22);
    data.Margin = new Padding(0);
    last.Controls.Add(pic);
    pic.Size = new Size(320, 276);
    pic.Margin = new Padding(0);
    }



}

return null;

Answer 2

您有三个名为first，two和last的变量。据推测，这些是您尝试添加的控件。问题是您是一遍又一遍地添加三个变量的相同实例。如果您希望每次添加新的实例，则每次都应创建first，two和last的新实例。请注意，您已使用name，data和pic执行此操作。

另外，正如其他人所说，你也不需要while (sort == 1)它应该是if (sort == 1)。

最后，请注意，如果您通过调试器运行代码并逐步执行，您会看到循环运行的次数是您想要的，并且您可能已经弄清楚真正的问题是什么。

Loop不工作只创建3个对象

2 个答案: