单例消息框

发布于 2025-01-02 23:45:53 字数 383 浏览 1 评论 0原文

我正在编写一个应用程序，其中当连接发生问题时，我想弹出一个消息框并向用户显示错误...

为此目的，当程序抛出异常时，它将进入 catch 块，并且我想要向用户显示消息，这里是代码：

        catch (WebException ex)
        {
            if (!(ex.Message == "The operation has timed out."))
            {
                  MessageBox.Show(ex.Message);
            }

        }

因为看起来程序会永远捕获类似的东西，直到连接修复，所以我应该怎么做才能一次只更新一个消息框上的消息？

原文

I am writing an application in which when something happened to the connection I want to pop up a messagebox and show the user the error...

for this purpose when the program throw an exception it will come to the catch block and in that I want to show the user the message here is the code :

        catch (WebException ex)
        {
            if (!(ex.Message == "The operation has timed out."))
            {
                  MessageBox.Show(ex.Message);
            }

        }

As it seems the program will come to this catch something like forever till the connection is become fixed so what should I do to update my message on just one messagebox at a time?

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玉环 2025-01-09 23:45:53

MessageBox 显示时没有太多控制。我将使用另一个以模态模式显示的 Form 。在显示之前，您可以启动一个单独的线程并放置监视连接的逻辑。重新建立后，通知消息表单并将其关闭。

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安稳善良 2025-01-09 23:45:53

您可以使用类似的内容：

public static class FailureMessagebox
{
    private static bool _hasBeenSuccessful = true;

    public static void ShowIfFailure(Action someAction)
    {
        try
        {
            someAction();
            _hasBeenSuccessful = false;
        }
        catch (Exception err)
        {
            if (_hasBeenSuccessful)
                MessageBox.Show(ex.Message);

            _hasBeenSuccessful = false;
                    throw;
        }
    }
}

示例用法：

try
{
   WebResponse response;
   FailureMessagebox.ShowIfFailure(() => response = webRequest.GetResponse());
}
catch (WebException err)
{
   //handle the exception here.
}

You can use something like:

public static class FailureMessagebox
{
    private static bool _hasBeenSuccessful = true;

    public static void ShowIfFailure(Action someAction)
    {
        try
        {
            someAction();
            _hasBeenSuccessful = false;
        }
        catch (Exception err)
        {
            if (_hasBeenSuccessful)
                MessageBox.Show(ex.Message);

            _hasBeenSuccessful = false;
                    throw;
        }
    }
}

Sample usage:

try
{
   WebResponse response;
   FailureMessagebox.ShowIfFailure(() => response = webRequest.GetResponse());
}
catch (WebException err)
{
   //handle the exception here.
}

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