在C#Windows应用中显示等待消息 [英] Show wait message in c# windows app

问题描述

我正在做一个C#Windows应用程序.我必须做一些冗长的工作，就像许多表数据一个接一个地更新一样，所以我只想显示哪个数据库正在更新.在这里，我提供了一个示例程序来解决我的问题.

I am doing a c# windows application. I have to do some lengthy work just like many tables data update one by one so i just want to show which database updation is going on. Here i gave a sample program to solve my problem.

for (int i = 0; i < 10; i++)
            {
                richTextBox1.Text += "Now" + i + " is running \n";
                System.Threading.Thread.Sleep(1000);
            }

推荐答案

我认为您想要使用的是BackgroundWorker:

I think what you want is to use the BackgroundWorker:

var bw = new BackgroundWorker();
bw.DoWork += (sender1, eventArgs1) =>
                        {
                            var bw1 = (BackgroundWorker)sender1;
                            System.Threading.Thread.Sleep(1000);
                            bw1.ReportProgress(1);
                        };
bw.ProgressChanged += (sender2, eventArgs2) =>
            {
                            richTextBox1.Text += "Now" + i + " is running \n";
            };
bw.RunWorkerAsync() 

我会在WPF中将一个Task与Dispatcher一起使用，但以上将与WinForms一起使用.

忘记了背景工作者的开始

I would use a Task with the Dispatcher in WPF, but the above will work with WinForms.

Forgot the start of the Background worker

我不太确定您要问的是什么，但我想您可能想要这样的东西:

I''m not really sure what you are asking, but I think you might want something like this:

int currentIndex = 0;
String[] updates;      // the array containing all the updates you are doing
                       // as Strings since you didn't specify

doUpdates();           // call this when you want to get started

void doUpdates()
{
    // check that current index is in bounds first, then...

    using(BackgroundWorker bw = new BackgroundWorker)
    {
        richTextBox1.Text += "Now " + i + " is running\n";

        bw.DoWork += new DoWorkEventHandler(bw_DoWork);
        bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_Completed);
        bw.RunWorkerAsync();
    }
}

void bw_DoWork(object sender, DoWorkEventArgs e)
{
    // do your updates on updates[currentIndex]
}

void queryWorker_Completed(object sender, RunWorkerCompletedEventArgs e)
{
    ++currentIndex;
    doUpdates();
}

这将在BackgroundWorker线程上进行每次更新，然后更新到下一个索引并运行其余更新.

This will do each update on a BackgroundWorker thread, then update to the next index and run through the rest of the updates.

使用

Use a progress bar[^], it''s much better for the user experience.

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