problem in extract values from xml

Question

3.00/5 (2 votes)

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Dear friends
iam facing a problem to read a xml file my code is

C#

var xmlStr = File.ReadAllText("ConfigurationManager.config");
var messagesElement = XElement.Parse(xmlStr);
var messagesList = (from message in messagesElement.Elements("add")
select new
{
   Connectionstring = message.Attribute("connectionString").Value,
   Provider = message.Attribute("providerName").Value,
   Name = message.Attribute("name").Value
}).ToList();

public class XmlData 
{
   public string Connectionstring { get; set; }
   public string Provider { get; set; }
   public string Name { get; set; }
}

and my xml file is

XML

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
    </configSections>
    <connectionStrings>
        <add name="DAL.Properties.Settings.OnlineExamConnectionString"
            connectionString="Data Source=S90\SQLEXPRESS;Initial Catalog=OnlineExam;Persist Security Info=True;User ID=sa;Password=123456"
            providerName="System.Data.SqlClient" />
    </connectionStrings>
</configuration>

but i cannot extract values from my XML file

Posted 13-Oct-14 20:21pm

srilekhamenon

Updated 13-Oct-14 23:27pm

Nelek

v3

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Comments

jing567 14-Oct-14 2:29am

Can you tell me that at what location exactly u r facing problem? What is ur exact problemm... So that we can provide an alternative code

Sergey Alexandrovich Kryukov 14-Oct-14 2:36am

What problem?
—SA

srilekhamenon 14-Oct-14 2:41am

the code is returning 0 elements, no runtime error, Might be iam missing some syntax

Dominic Burford 14-Oct-14 3:52am

Is there a particular reason why you are using LINQ to determine your connection strings? Why not use the built-in class ConfigurationManager instead? Also, your function reads in the entire contents of the config file to only discard most of it with your LINQ statement. This is inefficient, and for larger files could be costly.

srilekhamenon 14-Oct-14 4:11am

my requirement is that i want my user to configure his servername, username and password,

2 solutions

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Sinisa Hajnal · Accepted Answer · 2014-10-13T22:28:00

Solution 1

Get connection string from config file[^]

There is an option for retrieving the connection string by name. You shouldn't parse config, there are classes for all of it.

Posted 13-Oct-14 22:28pm

Sinisa Hajnal

Comments

srilekhamenon 14-Oct-14 5:10am

Thanks, i was googling from some time but could not found solution

jaket-cp · Accepted Answer · 2014-10-13T22:46:00

I am no expert with LINQ to XML.
But I did some googling and it seems as though you need to use Descendants instead of Elements.
How to: Retrieve a Single Attribute (LINQ to XML):
http://msdn.microsoft.com/en-gb/library/bb387086.aspx[^]

C#

var messagesList = (from message in messagesElement.Descendants("add")
       select new
       {
           Connectionstring = message.Attribute("connectionString").Value,
           Provider = message.Attribute("providerName").Value,
           Name = message.Attribute("name").Value
       }).ToList();

Hope that helps out.