并非所有代码路径都返回一个值，任何一个请提供解决方案 [英] not all code paths return a value can any one please provide a solution

问题描述

public class ProductModel
{
   public string InsertProduct(Product product)
   {
      try
      {
         GarageEntities db = new GarageEntities();
         db.Products.Add(product);
         db.SaveChanges();

         return product.Name + "was succesfully inserted";
      }
      catch (Exception e)
      {
         return "Error:" + e;
      }
   }

推荐答案

编译器抱怨函数末尾缺少return语句（他是不够聪明，无法检测到从未到达终点）。您有三种选择：

• 忽略或取消警告（非专业）。
• 最后返回结果（将返回点从try块移到结尾处。）
• 最后返回一些内容。

The compiler complains about a missing return statement at the end of the function (he is not smart enough to detect that the end is never reached). You have three options:

• Ignore or suppress the warning (nonprofessional).
• Return the result at the end (move the return from the try block to the end).
• Return something at the end.

public string InsertProduct(Product product)
{
   try
   {
      GarageEntities db = new GarageEntities();
      db.Products.Add(product);
      db.SaveChanges();
      // May be moved to end of function
      return product.Name + "was succesfully inserted";
   }
   catch (Exception e)
   {
      return "Error:" + e;
   }
   // Make the compiler happy or return success here
   return "";
}

询问此类问题的提示：

始终包含编译器代码（此处为CS0161），因为这样可以清楚地说明发生了什么。但是，在网上搜索消息和/或代码也会回答这个问题。

A tip for asking about such problems:
Always include the compiler code (CS0161 here) because this makes it clear what happened. However, searching the web for the message and/or code would have answered this too.

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