怎么了?以及如何解决?我正在尝试学习 c#-task 中的新主题。当我运行时,我收到错误消息:
错误 CS0407“Task MainWindow.btn1_ClickAsync(object, RoutedEventArgs)”返回类型错误
public async Task btn1_ClickAsync(object sender, RoutedEventArgs e)
{
txtState.Text = "btn1_Click started";
await LongRunningFunc1();
txtState.Text = "btn1_Click finished";
}
private async Task LongRunningFunc1()
{
txt1.Text = "Processing 1 .....";
btn1.Content = "Wait";
await Task.Delay(5000);
txt1.Text = "Hello From Func1";
btn1.Content = "Click";
}
wpf 设计器:
<Grid>
<TextBlock Name="txtState" Margin="265,10,274,356"/>
<TextBlock Name="txt1" Height="50" RenderTransformOrigin="0.966,-0.95" Margin="281,68,320,301"/>
<TextBlock Name="txt2" Height="50" Margin="253,238,274,131" />
<Button Name="btn1" Background="Red" Margin="281,127,300,208" Click="btn1_ClickAsync"></Button>
<Button Name="btn2" Background="Aqua" Margin="298,309,311,27"></Button>
</Grid>
最佳答案
按钮单击事件是可接受 async void 的少数方法签名之一。改变你的阅读方式
public async void btn1_ClickAsync(object sender, RoutedEventArgs e)
你应该没问题。
关于c# - 任务的返回类型错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52024766/