how to compare three columns in a StartsWith manner

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Hi Friends,

I need to validate an output XML. Output XMl generated based on a search value.

how the code works

1) if the user types a name in the textbox and invoke the service it will generate an output Xml.
2) Search behaves likes a "Start with manner"
3) It should search 3 columns lastname,sortname,corpname. If any of the columns contains the value it should return.

My requirement is to validate the output xml
1) check 3 child elements (lastname,sortname,corpname) and verify in at least on of the element contain the search value. if not its a fail case

here is my XML

XML

<?xml version="1.0" encoding="utf-8"?>
<Root>
  <info>
    <lastname>jinesh</lastname>
    <sortname>sam</sortname>
    <corpname>kp</corpname>
    <company>asdf</company>
    <address>qwert</address>
    <pincode>786678</pincode>
  </info>
  <info>
    <lastname>manoj</lastname>
    <sortname>jinu</sortname>
    <corpname>kalpana</corpname>
    <company>zxcv</company>
    <address>bnml</address>
    <pincode>12345</pincode>
  </info>
  <info>
    <lastname>karthik</lastname>
    <sortname>rahul</sortname>
    <corpname>jimmy</corpname>
    <company>lkjh</company>
    <address>poiu</address>
    <pincode>98765</pincode>
  </info>
  <info>
    
  </info>
  
</Root>

Here this xml is valid for three inputs 'ji','j','k'

Here is my code

C#

public static bool check(string namecheck)
        {
        XDocument xdoc = XDocument.Load("Samplexml.xml");
        return xdoc.Descendants("info")
                .Where(item =>
                    {
                        string fname = (string)item.Element("lastname") ?? "";
                        string sname = (string)item.Element("sortname") ?? "";
                        string cname = (string)item.Element("corpname") ?? "";
                        return fname.StartsWith(namecheck) && sname.StartsWith(namecheck) && cname.StartsWith(namecheck);
                    })
                    .ToList().Any();        
        }

C#

bool tf=check("ji");

Posted 26-Jul-15 1:35am

jinesh sam

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Comments

Abhipal Singh 26-Jul-15 14:16pm

And what is the issue you are facing with this code?

I think && should be replaced with || in the return statement below:
return fname.StartsWith(namecheck) &&|| sname.StartsWith(namecheck) &&|| cname.StartsWith(namecheck);

jinesh sam 26-Jul-15 14:21pm

return value received is false. if i pass "ji" it should be pass
let me try with ur suggestion

jinesh sam 26-Jul-15 14:27pm

now i am getting return value as true. but the problem is when i pass "jin" it should return false because 3rd info node does not contain name starting with "jin"

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Maciej Los · Accepted Answer · 2015-07-26T21:39:00

As Abhipal Singh[^] suggested, you have to replace && (boolean AND) with || (boolean OR) operant. Why? Test it to find out:

C#

var res1 = true && true && true; //returns true
var res2 = true && true && false; //returns false
var res3 = true && false && false; //returns false
var res4 = false && false && false; //returns false
var res5 = true || true || true; //returns true
var res6 = true || true || false; //returns true
var res7 = true || false || false; //returns true
var res8 = false || false || false; //returns false

Below query works as well:

C#

string sSearchedValue = @"jin";
var result = xdoc.Root.Descendants("info")
    .Where(x=>x.HasElements)
    .Select(x=>x.Element("lastname").Value.StartsWith(sSearchedValue) ||
        x.Element("sortname").Value.StartsWith(sSearchedValue) ||
        x.Element("corpname").Value.StartsWith(sSearchedValue));

Returns:

True
True
False

If you would like to get corresponding nodes, replace Select with Where statement.
Returned values:

XML

<info>
  <lastname>jinesh</lastname> <!-- matching value -->
  <sortname>sam</sortname>
  <corpname>kp</corpname>
  <company>asdf</company>
  <address>qwert</address>
  <pincode>786678</pincode>
</info>
<info>
  <lastname>manoj</lastname>
  <sortname>jinu</sortname> <!-- matching value -->
  <corpname>kalpana</corpname>
  <company>zxcv</company>
  <address>bnml</address>
  <pincode>12345</pincode>
</info>