本文介绍了跨线程操作在 Windows 窗体中无效的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
谁能帮助我我有一个问题我试图通过线程池让这段代码在后台工作，但我似乎无法让它工作我一直收到这个错误:
Could anyone help me i have a problem I'm trying to get this code to work in the background via threadpool but i cannot seem to get it to work i keep getting this error:
Cross-thread operation not valid: Control 'ListBox3' accessed
from a thread other than the thread it was created on.
这是我正在使用的代码:
Here is the code i am using:
private void DoWork(object o)
{
var list = ListBox3;
var request = createRequest(TxtServer.Text, WebRequestMethods.Ftp.ListDirectory);
using (var response = (FtpWebResponse)request.GetResponse())
{
using (var stream = response.GetResponseStream())
{
using (var reader = new StreamReader(stream, true))
{
while (!reader.EndOfStream)
{
list.Items.Add(reader.ReadLine());
ResultLabel.Text = "Connected";
}
}
}
}
}
推荐答案
您需要调用委托来更新列表.请参阅此 MSDN 示例.
You need to invoke a delegate to update the list. See this MSDN example.
这篇关于跨线程操作在 Windows 窗体中无效的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！
本站部分内容来源互联网,如果有图片或者内容侵犯您的权益请联系我们删除！