C# -如何不使WPF用户界面冻结，同时详细说明
C# -如何不使WPF用户界面冻结，同时详细说明
提问于 2021-06-24 09:57:13
我有一个按钮，点击它后，会在一个带有循环的远程数据库中发送大量数据，但是在这个操作期间，整个wpf UI都被冻结了。我的目标是使加载程序在处理数据库中的所有内容时工作。我的按钮代码：
private void btn_Start_Click(object sender, RoutedEventArgs e)
{
pb_loader.IsIndeterminate = true; //<- it has to start to make animation
IEmailService emailService = new EmailService();
IUserQueryService emailQueryService = new UserQueryService();
var idIniziale = int.Parse(txtIdIniziale.Text);
var idFinale = int.Parse(txtIdFinale.Text);
var n = idFinale - idIniziale;
string mail = "";
for(int i=0; i<=n; i++)
{
mail = txtMail.Text + idIniziale + "@mail.local";
var exist = emailQueryService.CheckUserExist(mail); //<- db operation method
if (exist == false)
{
var lastUniqueId = emailQueryService.GetLastUniqueId();//<- db operation method
lastUniqueId = lastUniqueId + 1;
var idUtente = emailService.SalvaUtente(mail, lastUniqueId); //<- db operation method
emailService.AssegnaReferente(idUtente, txtMail.Text);//<- db operation method
emailService.AssegnaRuoli(idUtente); //<- db operation method
}
idIniziale++;
}
pb_loader.IsIndeterminate = false; //<- it has to end animation of loading
}回答 1
Stack Overflow用户
回答已采纳
发布于 2021-06-24 10:09:17
在事件处理程序中运行后台操作的一种直接方法是声明事件处理程序async并运行并await为任务：
private async void btn_Start_Click(object sender, RoutedEventArgs e)
{
// prevent click while operation in progress
btn_Start.IsEnabled = false;
pb_loader.IsIndeterminate = true;
// access UI elements before running the Task
var mail = txtMail.Text + idIniziale + "@mail.local";
...
await Task.Run(() =>
{
// perform background operation
// use local variables "mail" etc. here
});
pb_loader.IsIndeterminate = false;
btn_Start.IsEnabled = true;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/68113546
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