C# XML How to check if a node exists?

S

Stels0072018-06-30 16:47:51

C++ / C#

Stels007, 2018-06-30 16:47:51

Hello! I can not find on the Internet how to check the existence of a node?

<head>
 <block1></block1>
 <block2></block2>
 <block3></block3>
</head>

For example, how to find out if the block3 element exists?

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1 answer(s)

A

Alexey Nemiro, 2018-06-30
@Stels007

using System.Xml;

var xml = @"<head>
 <block1></block1>
 <block2></block2>
 <block3></block3>
</head>";

var doc = new XmlDocument();  
doc.LoadXml(xml);

var node = doc.SelectSingleNode("/head/block3");

if (node != null)
{
  Console.WriteLine("Узел существует!");
}
else
{
  Console.WriteLine("Узел не найден...");
}