设定的等待消息，并等待光标

Question

WPF VS 2010 C＃

有一个窗口，在后面的代码的开头是收集数据对于需要45秒以上的观点......你会怎么做一个请稍候消息持续到 收集视图。 也有，有什么办法有一个等待光标？

Answer 1

加载数据到BackgroundWorker。使用BackroundWorkers ProgressChanged -event显示进度消息。

// Show here your wait message make a ProgressBar visible  
Mouse.OverrideCursor = Cursors.Wait; // Maybe you only want to set the cursor of the window. Then change this line code (and the reset) 
BackgroundWorker bgWorker = new BackgroundWorker() { WorkerReportsProgress=true}; 
bgWorker.DoWork += (s, e) => { 
    // Load here your file/s 
    // Use bgWorker.ReportProgress(); to report the current progress 
}; 
bgWorker.ProgressChanged+=(s,e)=>{ 
    // Here you will be informed about progress and here it is save to change/show progress. You can access from here savely a ProgressBars or another control. 
}; 
bgWorker.RunWorkerCompleted += (s, e) => { 
    // Here you will be informed if the job is done. Close here your wait message or hide your progressbar 
    Mouse.OverrideCursor = null; 
}; 
bgWorker.RunWorkerAsync(); 

由于装载作业现在运行的异步，你必须确保你的用户界面不会让用户做的事情，是在当前的应用程序状态（加载）无效。最简单的方法是，将IsEnabled-property设置为false的窗口禁用。