并非所有代码路径返回值

本文介绍了并非所有代码路径返回值的处理方法，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

亲爱的朋友们， 我写了这样的代码来检查访问级别。 但我得到的错误是并非所有代码路径返回值 请建议相同的原因和解决方案

Dear Friends, I have written a code like this to check the access level. But I am getting the error as "Not All Code Path Return A Value" Kindly suggest the reason and solution for the same

protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { if (isAccessLevel() == "YES") { Show_My_Data() } else { Hide_My_Data() } } } public string isAccessLevel() { if (ACC_YN == "YES") { if (STA_YN == "RELEASE") { return "YES"; } else { return "NO"; } } }

推荐答案

isAccessLevel未从所有分支返回值。把它改成这样， isAccessLevel is not returning the value in from all branches. Change it to like this, public string isAccessLevel() { if (ACC_YN == "YES") { if (STA_YN == "RELEASE") { return "YES"; } else { return "NO"; } } else { return "NO"; } }

你应该在if else循环之外有返回变量。想想会发生什么，如果ACC_YN = false。它会返回什么？ You should have return variable outside of if else loop. think what will happen,if ACC_YN=false. what it will return? public string isAccessLevel() { string returnvalue="No"; if (ACC_YN == "YES") { if (STA_YN == "RELEASE") { returnvalue="Yes"; } else { returnvalue="No"; } } return returnvalue; }

上面的推理是合理的，我建议使用以下代码片段。 The reasoning is sound above, I would suggest the following code snippets. public string isAccessLevel() { accessLevel = "NO"; if (ACC_YN == "YES" && STA_YN == "RELEASE") accessLevel = "YES"; return accessLevel; }