存在明确的转换。你错过了演员吗？

Question

我收到以下错误：

An explicit conversion exists. Are you missing a cast? 

这是为什么？

private async void getEmotion_Click(object sender, Windows.UI.Xaml.RoutedEventArgs e) 
     { 
      try 
      { 
       emotionResult = await emotionServiceClient.RecognizeAsync(imageStream.AsStream()); 
       if(emotionResult != null) 
       { 
        Scores score = emotionResult[0].Scores; 
       } 
      } 
      catch 
      { 
       Output.Text = "Error returning the Emotion"; 
      } 
     } 

Answer 1

请参阅类似的问题，在这里回答：Cannot implicitly convert type 'Microsoft.ProjectOxford.Common.Contract.EmotionScores[]' to 'Microsoft.ProjectOxford.Emotion.Contract.Scores[]'

得分和EmotionScores是同一个对象的名称明智的，但不是不能自动转换。你可以说

EmotionScores scores = emotionResult[0].Scores; 

或者干脆

var scores = emotionResult[0].Scores;