How to check whether attribute is present or not in XPath in xml file. Samples and examples

How to check whether attribute is present or not in XPath in xml file.

Posted Date: 06-Aug-2012	Category: C# Syntax
Author: Sarang Singnapurkar	Member Level: Gold	Points: 20

There is a sample code to check whether the attribute is present in XPath in xml file or not. User can set xpath , attribute and xml file dynamically to check this. Code has been developed in C# whereas application is windows based.

How to check whether attribute is present or not in XPath in xml file.
Description -
Create a class library which will check whether the attribute is present in XPath in xml file. For e.g There is one xml file say test.xml in which xpath will be //studentsList/student then suppose user needs to find "firstname" as an attribute which is present in //studentsList/student of test.xml then
user has to give parameters such as firstname i.e. name of the parameter , test.xml i.e. xml file name , //studentsList/student i.e. xpath in xml
Use following code for the same -


  public bool Attribute_Present_Or_not(string user_defined_attribute, string user_defined_xml_file, string user_defined_xpath)
        {
            bool chk_result = false;          
          
            try
            {
                XmlDocument user_xml_document = new XmlDocument();
                user_xml_document.Load(user_defined_xml_file);

                XmlNodeList user_nodeList = user_xml_document.SelectNodes(user_defined_xpath);                         
                XmlElement root = user_xml_document.DocumentElement;  
            
                foreach (XmlNode user_node in user_nodeList)
                {
                    try{
                      if (user_node.Attributes.GetNamedItem(user_defined_attribute)!=null)                       
                    
                       {
                            chk_result = true;    

                            return chk_result;
                        }
                }
            catch (Exception )
            {
                            chk_result = false;                         
                           
                            return chk_result;
                         
             }

                }

            }
            catch (NullReferenceException)
            {
                chk_result = false;
               
                return chk_result;
            }
            catch (XPathException)
            {
                chk_result = false;
               
                return chk_result;
            }
          
           return chk_result;
        }

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How to check whether attribute is present or not in XPath in xml file.

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