是否有一个 GetElementByTagName 来处理标签不存在的情况

发布于 2024-08-30 00:37:55 字数 343 浏览 0 评论 0原文

我下面有以下代码，但有时“serving_description”标签不存在。现在我只是在它周围尝试捕获，但我想知道是否有更干净的方法来处理这种情况。

XmlElement servingElement = (XmlElement)servingNode;
serving.Id = Convert.ToInt32(servingElement.GetElementsByTagName("serving_id")[0].InnerText);
serving.Name = servingElement.GetElementsByTagName("serving_description")[0].InnerText;

原文

i have the following code below but sometime the "serving_description" tag isn't there. Right now i just put a try catch around it but i wanted to find out if there was a cleaner way to handle this scenario.

XmlElement servingElement = (XmlElement)servingNode;
serving.Id = Convert.ToInt32(servingElement.GetElementsByTagName("serving_id")[0].InnerText);
serving.Name = servingElement.GetElementsByTagName("serving_description")[0].InnerText;

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时光瘦了 2024-09-06 00:37:55

我宁愿检查返回的 NodeList 是否不为 null，并在使用默认为 try 之前检查计数是否大于零抓住。

一些简单的东西，比如

serving.Name = "defaultName";
XmlNodeList elemList = servingElement.GetElementsByTagName("serving_description");
if (elemList != null && elemList.Count > 0)
    serving.Name = elemList[0].InnerText;

EDIT

如果我没记错的话，您甚至可能不需要检查 null 因为 GetElementsByTagName 方法可能只返回一个空列表（但我现在无法验证，抱歉）

I would rather check that the returning NodeList is not null and check that the count is greater than zero before using defaulting to a try catch.

Something simple like

serving.Name = "defaultName";
XmlNodeList elemList = servingElement.GetElementsByTagName("serving_description");
if (elemList != null && elemList.Count > 0)
    serving.Name = elemList[0].InnerText;

EDIT

If I am not mistaken, you might not even have to check for the null as the GetElementsByTagName method might just return an empty list(but I cannot verify that right now, sorry)

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