如何检查是否设置了课程属性。

本文介绍了如何检查是否设置了课程属性。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

public class clsListingDetails { private string _SystemName; public string SystemName { get { return _SystemName; } set { _SystemName = value; } } private string _MaxCharacters; public string MaxCharacters { get { return _MaxCharacters; } set { _MaxCharacters = value; } } } public class User { public Dictionary<string, ArrayList> colListingDetails { get; set; } }

在上面的colListingScreenReportPrintDetails中，我们存储了clsListingDetails属性。但它是根据用户类型设置的。对于某些用户它没有设置，但我可以检查是否设置.. ??

In above colListingScreenReportPrintDetails we storing clsListingDetails properties. But it is set according to user type. For some user it is not set but I can I check whether or not is set..??

推荐答案

检查如下的空值 if（clsListingDetails.MaxCharacters == null） { } Check for the null value like below if ( clsListingDetails.MaxCharacters == null ) { }