方法检查是否为空

本文介绍了方法检查是否为空的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个wcf服务，该服务正在返回方法的输出.我正在检查天气是否为空

Hi, I have a wcf service which was returning the output of a method. i am checking weather it is empty or not

if(objRec.System[]="" ) { }

它向我抛出了一个错误语法错误；期望值" .... in]" 问候， Basha

It was throwing me a error "syntax error; value expected"....in "]" Regards, Basha

推荐答案

objRec.System[]不是有效的对象引用；添加索引值以告诉编译器您要引用的元素. objRec.System[] is not a valid object reference; add an index value to tell the compiler which element you are referring to.

if(objRec.System[]="" ) { }

如果要在数组中查找带有的值，则应具有数组索引，否则，如果要检查数组是否为空，请执行以下操作.

if you are looking for a value with in the array you should have an array index, or else if you would like to check if the array is empty or not do the following.

if(objRec.System.Count == 0 ) { }

希望对您有帮助！

Hope it helps!!