并非所有代码路径都返回值错误

问题描述

公用字符串categoryName(双类别)
    {
       字符串poolCategory0;
       字符串poolCategory1;
       字符串poolCategory2;

        poolCategory0 =小";
        poolCategory1 ="Medium";
        poolCategory2 =大";
       如果(类别< 500000)
        {
            lblCategory.Text = poolCategory0;
        }
       否则，如果(类别> = 500000和类别< 1500000)
        {

 public string categoryName(double category)
    {
        string poolCategory0;
        string poolCategory1;
        string poolCategory2;

        poolCategory0 = "Small";
        poolCategory1 = "Medium";
        poolCategory2 = "Large";
        if (category < 500000)
        {
            lblCategory.Text = poolCategory0;
        }
        else if (category >= 500000 & category < 1500000)
        {

            lblCategory.Text = poolCategory1;
        }
       其他
            {
                lblCategory.Text = poolCategory2;
            }

            lblCategory.Text = poolCategory1;
        }
        else 
            {
                lblCategory.Text= poolCategory2;
            }

对onclick进行编码，其中categoryName称为

code onclick where categoryName called

请帮助

推荐答案

问题可能出在您的方法categoryName声明它返回一个字符串值而没有.可以从更改签名公共字符串categoryName(double category)到 public void categoryName(double category)或在方法末尾返回一个字符串.

The problem probably is that your method categoryName declares that it returns a string value and it does not. Either change the signature frompublic string categoryName(double category) to public void categoryName(double category)or return a string at the end of the method.

Rgds MM

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