Get the Required Field Element in orchetsration

Question

My input instance is as follows:
<ns0:Students xmlns:ns0="http://CallTemplate_Increment.StudentSchema">
  <StudentTransactions>
    <ID>100</ID>
<RowIndicator>H</RowIndicator>
    <FName>Prakash</FName>
    <LName>Sajwan</LName>
    <ID_Detail/>
    <Cost/>
    <GL_String/>
  </StudentTransactions>
   <StudentTransactions>
    <ID/>
<RowIndicator>D</RowIndicator>
    <FName></FName>
    <LName></LName>
    <ID_Detail>100</ID_Detail>
    <Cost>200</Cost>
    <GL_String>300.890.830.777</GL_String>
  </StudentTransactions>
  <StudentTransactions>
    <ID/>
<RowIndicator>D</RowIndicator>
    <FName>D</FName>
    <LName></LName>
    <ID_Detail>100</ID_Detail>
    <Cost>200</Cost>
    <GL_String></GL_String>
  </StudentTransactions>
  <StudentTransactions>
    <ID/>
<RowIndicator>D</RowIndicator>
    <FName>D</FName>
    <LName></LName>
    <ID_Detail>100</ID_Detail>
    <Cost>100</Cost>
    <GL_String>300.890.830.777</GL_String>
  </StudentTransactions>
    <StudentTransactions>
    <ID>200</ID>
<RowIndicator>H</RowIndicator>
    <FName>Ramesh</FName>
    <LName>Rawat</LName>
    <ID_Detail/>
    <Cost/>
    <GL_String/>
  </StudentTransactions>
   <StudentTransactions>
    <ID/>
<RowIndicator>D</RowIndicator>
    <FName>D</FName>
    <LName/>
    <ID_Detail>200</ID_Detail>
    <Cost>700</Cost>
    <GL_String>500.890.830.777</GL_String>
  </StudentTransactions>
  <StudentTransactions>
    <ID/>
<RowIndicator>D</RowIndicator>
    <FName>D</FName>
    <LName/>
    <ID_Detail>200</ID_Detail>
    <Cost>900</Cost>
    <GL_String>500.890.830.777</GL_String>
  </StudentTransactions>
</ns0:Students>
If RowIndicator is H then required field is RowIndicator,FName,ID.
IF RowIndicator is D then required field is RowIndicator, ID_Detail,Cost,GL_String.
Now if any required field  is empty then store the name of these Elements in a file  and send this file in the attachment in mail.And how can I uniquely identify that these information is for particular student.
H stands for header and D stands for details.
One Record (which RowIndicator is  H) belongs to other record (which RowIndicator is D) only when ID of 
record (which RowIndicator is  H) equals to ID_Details of record(which RowIndicator is D).
Any Help would be appreciated.I want to do it orchestration after getting the message by calling a c# function. I have written the attachment function for sending mail.I just want to put those information in a file.
Prakash

Answer 1

In Orchestration, you can call a helper method as the following, where you can apply the validation log and either constructs a XML-Message with error details or a simple error string message with error details appended which you can pass to your email program
and send email.
public static string ContractValidationMsg(XmlDocument xmlInput)
string sErrorMessage = String.Empty;
//Get the HeaderID
XmlNodeList headerNodes = xmlInput.SelectNodes("/*[local-name()='Students' and namespace-uri()='http://CallTemplate_Increment.StudentSchema']/*[local-name()='StudentTransactions' and namespace-uri()=''][RowIndicator='H']");
//Loop thur all the filtered header node
foreach (XmlNode headerNode in headerNodes)
string sHeaderID = headerNode.SelectSingleNode("/*[local-name()='Students' and namespace-uri()='http://CallTemplate_Increment.StudentSchema']/*[local-name()='StudentTransactions' and namespace-uri()='']/*[local-name()='ID' and namespace-uri()='']").InnerText;
//Get the DetailID for the filtered ErrorID
XmlNodeList detailNodes = xmlInput.SelectNodes("/*[local-name()='Students' and namespace-uri()='http://CallTemplate_Increment.StudentSchema']/*[local-name()='StudentTransactions' and namespace-uri()=''][RowIndicator='D'][ID_Detail='" + sHeaderID + "']");
//Loop thru the DetailID
foreach (XmlNode detailNode in detailNodes)
string sCost = detailNode.SelectSingleNode("Cost").InnerText;
//Check Cost in detail is empty, if so then construct the error message
if (sCost == String.Empty)
sErrorMessage +=sErrorMessage + " For HeaderID:" + sHeaderID + " , In its Detail node, value for Cost element is missing /n" ;
string sGL_String = detailNode.SelectSingleNode("GL_String").InnerText;
//Check GL_String in detail is empty, if so then append the error message
if (sGL_String == String.Empty)
sErrorMessage += sErrorMessage + " For HeaderID:" + sHeaderID + " , In its Detail node, value for GL_String element is missing /n";
return sErrorMessage;
This is just to give you an idea and you and fine-tune it to fit your requirement. The above code is a working code.
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