我有一个c#win表单应用程序,其中包含flowLayoutPanel
。
我需要每秒更新此面板中的所有孩子。
这是我当前的代码,每1秒在系统计时器中调用一次:
public void RefreshReceiversPage()
{
if (checkBox_enableReceivers.Checked)
{
var receivers = OutgoingReceiverManager.GetCopyOfActiveRecieverHolders();
for (int i = 0; i < flowLayoutPanel_receivers.Controls.Count; i++)
{
var tmp = flowLayoutPanel_receivers.Controls[i];
flowLayoutPanel_receivers.Controls[i].Dispose();
tmp.Dispose();
}
flowLayoutPanel_receivers.Controls.Clear();
foreach (var item in receivers.ToList())
{
var tmpUc = new ucReceiverItem(item);
if (flowLayoutPanel_receivers != null)
{
try
{
flowLayoutPanel_receivers.Controls.Add(tmpUc);
}
catch
{
}
}
}
receivers = null;
}
}
现在这段代码完美地工作了大约2分钟,然后我突然开始得到error creating window handle
因此,我尝试捕获上面代码的原因。
但是在发生这种情况之后,窗格视图变得很有趣,我无法在不重新启动程序的情况下恢复它。
我搜索了高低,我似乎无法找到抛出异常的任何内容?
我能想到的一切是,我可能没有正确处理对象,而且内存耗尽了吗?
有人有任何建议或解决方案吗?
编辑:
这里是UCRecieverItem:
public partial class ucReceiverItem : UserControl
{
public ucReceiverItem(ReceiverHolder item)
{
InitializeComponent();
ConstructItem(item);
item = null;
}
private void ConstructItem(ReceiverHolder item)
{
label_name.Text = item.ReceiverDb.Name;
label_numberOfConnections.Text = item.ReceiverOutgoingConnectionManager.GetNumberOfConnections().ToString();
label_mrFilters.Text = item.ReceiverDb.MrFilters;
label_multipleConnections.Text = item.ReceiverDb.MultipleConnections.ToString();
//
int count = item.GetActiveBufferCount();
int size = item.GetActiveBufferSize();
//
label_bufferCount.Text = count + @" / " + size;
progressBar_buffer.Maximum = size;
progressBar_buffer.Minimum = 0;
progressBar_buffer.Value = count;
}
}
答案 0 :(得分:3)
此代码存在问题:
for (int i = 0; i < flowLayoutPanel_receivers.Controls.Count; i++)
{
var tmp = flowLayoutPanel_receivers.Controls[i];
flowLayoutPanel_receivers.Controls[i].Dispose();
tmp.Dispose();
}
flowLayoutPanel_receivers.Controls.Clear();
它只在容器中处理控件的一半。另一半被Controls.Clear();
调用删除,但这些控件不会被处理 - 所以它们仍然存在并且正在耗尽内存。
这样做每一秒都会解决问题:这可能是很多控制因素。
直接解决方法是妥善处理控件:
while (flowLayoutPanel_receivers.Controls.Count > 0) {
flowLayoutPanel_receivers.Controls[0].Dispose();
}
在此之后,我会质疑每秒都需要这样做 - 对于用户来说,这似乎是一个恶劣的环境。