问题描述
我正在从以下网站学习Websocket:https://radu-matei.com/blog/aspnet-core-websockets-middleware/如何从下面的任务中返回?
public override Task ReceiveAsync(WebSocket socket,WebSocketReceiveResult result,byte[] buffer)
{
string message = "Replied by: " + cn.GetId(socket);
Task.Run(async () =>
{
await socket.SendAsync(buffer: new ArraySegment<byte>(array: Encoding.ASCII.GetBytes(message),offset: 0,count: message.Length),messageType: WebSocketMessageType.Text,endOfMessage: true,cancellationToken: CancellationToken.None);
});
}
我得到了:严重性代码说明项目文件行抑制状态 错误CS0161'NotificationsMessageHandler.ReceiveAsync(WebSocket,WebSocketReceiveResult,byte [])':并非所有代码路径都返回值
我不知道如何返回任务。
解决方法
您不需要Task。显式运行,而不是
Task.Run(async () =>
{
await socket.SendAsync(buffer: new ArraySegment<byte>(array: Encoding.ASCII.GetBytes(message),offset: 0,count: message.Length),messageType: WebSocketMessageType.Text,endOfMessage: true,cancellationToken: CancellationToken.None);
});
您可以使用
await socket.SendAsync(buffer: new ArraySegment<byte>(array: Encoding.ASCII.GetBytes(message),cancellationToken: CancellationToken.None);
在这里,await将返回socket.SendAsync的结果,我假设它是异步的