有什么方法可以创建可能具有不同的调用和返回参数对象的方法? [英] Is there any way that I can create a method that might have a different call and return parameter object?

问题描述

我正在使用这种类型的代码:

I am using this type of code:

lock (l)
{
   try
   {
      var data = db2.Query<CardSetWithWordCount>(qry);
      return data;
   }
   catch (Exception ex)
   {
      db2.Rollback();
      Debug.WriteLine(ex);
      Console.WriteLine(qry);
      throw;
   }
}

或其他类似示例:

lock (l)
{
   try
   {
      var data = db2.Query<CardSetDetails>(qry);
      return data;
   }
   catch (Exception ex)
   {
      db2.Rollback();
      Debug.WriteLine(ex);
      Console.WriteLine(qry);
      throw;
   }
}

除了db2.Query的返回类型不同的对象外，代码完全相同.

The code is exactly the same except for the different objects that are the return type of db2.Query.

由于要花费很多行，我想用一个我调用并传入返回对象和try字符串的方法替换这两个块.但是我不确定从哪里开始，因为在这种情况下返回的对象是

As it takes many lines I would like to replace these two blocks with a single method that I call and pass in the return object and a try string. But I am not sure where to start because the object returned which is in this case:

  <CardSetWithWordCount>

对于我要替换的每种方法，

可以不同(例如).

could be different (such as )for each method I would like to replace.

这是我可以在方法中执行此操作的方式，如果可以，我将如何声明参数?

Is the way that I could do this in a method and if so how would I declare the parameters?

推荐答案

您可以使用以下泛型:

T RunQuery<T>(YourDB db, string qry)
{

   lock (l)
   {
       try
       {
           T data = db.Query<T>(qry);
           return data;
       }
       catch (Exception ex)
       {
          db.Rollback();
          Debug.WriteLine(ex);
          Console.WriteLine(qry);
          throw;
       }
    }
 }

这样称呼:

YourType res=RunQuery<YourType>(db2,qry);

请寻求更多信息: https://docs.microsoft.com/zh-CN/dotnet/csharp/programming-guide/generics/

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