C＃下载延迟-Java 学习之路

我有一个严重的问题 . 我正在做一个修补程序 .
程序中有一个"Patch"按钮，如果用户单击它，则开始下载 .
目前该程序需要下载5个文件 . 下载是正确的，这部分程序正在运行但是当我点击Patch按钮时，程序开始滞后，我可以't close, or change the position of it. Here' s代码：

private void button1_Click（object sender，EventArgs e）{Thread thread = new Thread（new ThreadStart（this.download））; thread.Start（）; }

public void download()
    {
        int downloaded = 0;
        int all = 5;
        WebClient myWebClient = new WebClient();

        if (button1.InvokeRequired)
        {
            MethodInvoker MethodControll = new MethodInvoker(download);
            this.button1.Invoke(MethodControll);
        }
        else
        {

            double state;
            jelenlegidownload.Text = "alut.dll";
            myWebClient.DownloadFile(Files.alutDLL, "alut.dll");
            downloaded++;
            state = downloaded / all * 100;
            progressBar.Value = Convert.ToInt32(state);
            progressBar.Refresh();
            this.Refresh();  

            jelenlegidownload.Text = "BlackBox.dll";
            myWebClient.DownloadFile(Files.BlackBoxDLL, "BlackBox.dll");
            downloaded++;
            state = downloaded / all * 100;
            progressBar.Value = Convert.ToInt32(state);
            progressBar.Refresh();
            this.Refresh();

            jelenlegidownload.Text = "DevIL.dll";
            myWebClient.DownloadFile(Files.DevILDLL, "DevIL.dll");
            downloaded++;
            state = downloaded / all * 100;
            progressBar.Value = Convert.ToInt32(state);
            progressBar.Refresh();
            this.Refresh();

            jelenlegidownload.Text = "fltkdll.dll";
            myWebClient.DownloadFile(Files.fltkdllDLL, "fltkdll.dll");
            downloaded++;
            state = downloaded / all * 100;
            progressBar.Value = Convert.ToInt32(state);
            progressBar.Refresh();
            this.Refresh();

            jelenlegidownload.Text = "glut32.dll";
            myWebClient.DownloadFile(Files.glut32DLL, "glut32.dll");
            downloaded++;
            state = downloaded / all * 100;
            progressBar.Value = Convert.ToInt32(state);
            progressBar.Refresh();
            this.Refresh();

Files.cs：

public class Files
{
    public static string alutDLL = "https://dl.dropbox.com/s/62tt9w194xefk7t/alut.dll?token_hash=AAHQmybYdR44TRrS9bWQWV7jlZBzZQ-mmmjNy1Kv_qR4cg&amp;dl=1";
    public static string BlackBoxDLL = "https://dl.dropbox.com/s/vtdrl8qdpky8p08/BlackBox.dll?token_hash=AAHCtQPBJ5s-3aL5B4FqrmOUIGP6BVvW8ZQeWd-xBzysTw&dl=1";
    public static string DevILDLL = "https://dl.dropbox.com/s/spni307vmk4zng9/DevIL.dll?token_hash=AAEmZdQj3dv2NIEh6tcWwkgyJHCytSsX65QXZyNGY2Vl1w&dl=1";
    public static string fltkdllDLL = "https://dl.dropbox.com/s/fsa29pelfwgk5ha/fltkdll.dll?token_hash=AAF55SuU_8bfli5gIiPpA-VLWUmZKLbOK-Ys8iokuJ8_XA&dl=1";
    public static string glut32DLL = "https://dl.dropbox.com/s/cptiwxv17nhtywp/glut32.dll?token_hash=AAGCNXQPpwrByjp-uG_avBbkNyNjTfOJFxbY3ieNAfLzVw&dl=1";
}

我怎样才能解决滞后问题？（正如我之前所说，如果我点击“补丁”按钮，文件正在下载，但程序“停止”）

2 回答

1

要阻止应用程序的下载部分阻止应用程序的UI部分，为什么不在其他线程上执行下载作业 . 这样，即使下载尚未完成，您的UI仍将保持响应 .

编辑：我认为这是一篇适用于您案例的精彩文章：

http://www.developerfusion.com/article/4134/net-threading-part-i/

回复于 2024-05-13T13:25:02+08:00
0
我想你误解了 InvokeRequired .

来自MSDN：

获取一个值，该值指示调用者在对控件进行方法调用时是否必须调用invoke方法，因为调用者与创建控件的线程不在同一个线程上 .

基本上，您在另一个线程上开始下载 . 但由于这会导致 InvokeRequired 为真，因此您可以回想一下GUI线程上的方法，即锁定应用程序 .

如果删除此部分，它会更好吗？
```
if (button1.InvokeRequired)
    {
        MethodInvoker MethodControll = new MethodInvoker(download);
        this.button1.Invoke(MethodControll);
    }
```
Update 要排除您的进度条出错，请尝试将下载方法简化为：
```
public void download()
{
    WebClient myWebClient = new WebClient();

    myWebClient.DownloadFile(Files.alutDLL, "alut.dll");
    myWebClient.DownloadFile(Files.BlackBoxDLL, "BlackBox.dll");
    myWebClient.DownloadFile(Files.DevILDLL, "DevIL.dll");
    myWebClient.DownloadFile(Files.fltkdllDLL, "fltkdll.dll");
    myWebClient.DownloadFile(Files.glut32DLL, "glut32.dll");
}
```
这应该使文件下载没有延迟，但您希望在进度条中看到任何更新（显然） .
回复于 2024-05-13T13:25:02+08:00

C＃下载延迟

2 回答

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