我收到以下代码错误 [英] I got Error Below code

问题描述

尊敬的所有专家，

Dear All Experts,

foreach (object x_loopVariable in dt.Rows)
            {
                x = x_loopVariable;
                if (x("Selected") + 1 == x("correct"))
                {
                    marks += 1;

                }
            }

r.Items.Add(dt.Rows [ctr] ["Choice1"]);

r.Items.Add(dt.Rows[ctr]["Choice1"]);

I got error near the

x = x_loopVariable;<br />

附近出现错误 感谢您提供宝贵的raplay

Thanku for valuable raplay

推荐答案

当然.

让我们看看:x_loopVariable是对象.假设x = x_loopVariable可以编译，x也是对象，否则分配兼容性将不允许编译此行.

在下一行中，存在两个问题:()"是方法调用的语法，但是我们已经知道x是对象，不能是方法.您可以改用"[]"，如果x的类型具有索引属性("this")，该方法将起作用.但是由于x是对象，因此不会编译，因为它不具有此属性.您可能需要某种类型的大小写，以匹配实际对象的某些运行时类型.我在这里撇开了可维护性的问题.

现在，考虑一下:这种微妙的"猜测！它们是完全多余的，因为您只需要提供足够的信息即可.您为什么认为我们需要阅读您的想法?这次我设法做到了(很好，几乎是:-))，但是下次可能不起作用.

—SA

Of course.

Let''s see: x_loopVariable is object. Assuming x = x_loopVariable compiles, x is also object, otherwise assignment compatibility would not allow compilation of this line.

In next line, there are two problems: "()" is a syntax for method call, but we already know x is object, cannot be a method. You could use "[]" instead, which would work if the type of x had an indexed property ("this"). But as x is object, it would not compile because it does not have this property. You might need a type case to some relevant run-time type of the actual object. I leave aside the problem of maintainability here.

And now, think about it: such "delicate" speculations! They are completely redundant, because you simply had to provide sufficient information. Why do you think we need to read your mind? This time I managed to do that (well, almost :-)) but next time it might not work.

—SA

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