不包含的定义，也没有找到接受类型为第一个参数的扩展方法 [英] Does not contain a definition for and no extension method accepting a first argument of type could be found

问题描述

我已经研究了一些解决该问题的方法，但是它们似乎与我所遇到的解决方案并不相同.

I've looked around at some of the solutions to this problem but they don't seem to be the same as what I'm experiencing.

我要调用的方法:

namespace BetfairAPI
{
    public class CBetfairAPI
    {
        public ArrayList placeBets(ArrayList betList, double stakeSize)
        {
            // code to betList maniplulate

            return betList;
        }
    }
}

我从中调用的方法:

namespace Bot
{
    public partial class Form1 : Form
    {
            private void makeBets(MarketSummary mkt, double odds, double stakeAmt)
            {
                ArrayList betList = new ArrayList();

                // code to build "betList"

                ArrayList bets = MyBetfair.placeBets(betList, stakeAmt);

            }
        }
    }
}

我收到的错误:

错误1'BetfairAPI.CBetfairAPI'不包含
的定义 'placeBets'并且没有扩展方法'placeBets'接受第一个 可以找到类型为'BetfairAPI.CBetfairAPI'的参数(您是 缺少using指令或程序集引用?)

Error 1 'BetfairAPI.CBetfairAPI' does not contain a definition for
'placeBets' and no extension method 'placeBets' accepting a first argument of type 'BetfairAPI.CBetfairAPI' could be found (are you missing a using directive or an assembly reference?)

在CBetfairAPI类中使用任何其他方法都没有问题.如果我执行"CBetfairAPI"，则在Visual Studio的下拉菜单中不会显示placeBets(). (所有其他方法和字段都可以).

I have no problem using any other methods in the CBetfairAPI class. placeBets() doesn't show up in the drop down menu in Visual studio if I do 'CBetfairAPI.' (all the other methods and fields do).

感谢您的帮助.

推荐答案

placeBets(betList, stakeAmt)是 instance 方法，而不是 static 方法.您需要先创建CBetfairAPI的实例:

placeBets(betList, stakeAmt) is an instance method not a static method. You need to create an instance of CBetfairAPI first:

MyBetfair api = new MyBetfair();
ArrayList bets = api.placeBets(betList, stakeAmt);

这篇关于不包含的定义，也没有找到接受类型为第一个参数的扩展方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！