C# class objects

Question

I have a class that I am using below. And I am using this class for my windows application. However, when I call the method from my application ReadInConfig() it successfully reads and fills the datatable, and assigns the _sip_ip address.

In my windows application I have the following. However, it doesn't give me the sip_ip that it has been assigned.

ConfigSIP readIn = new ConfigSIP();
readIn.ReadInConfig();
string sip_ip = readIn.sip_ip(); // Get nothing here.

I am thinking as the _sip_ip that has been assigned by the data table is a different object than doing this readIn.sip_ip();

Is there any way I can solve this problem?

Many thanks,

public class ConfigSIP
{
    private string _sip_ip;

        // Fill the data table and assign the sip ip.
    public void ReadInConfig()
    {
        DataTable dt = new DataTable("Admin");
        dt.ReadXmlSchema(@"C:\Config.xml");
        dt.ReadXml(@"C:\Config.xml");

        _sip_ip = dt.Rows[0]["Sip_ip"].ToString();
    }

        // Return the sip ip address.
    public string sip_ip()
    {
        return _sip_ip;
    }
}

What is "nothing"? An empty string? If so, this is a perfectly valid value for the _sip_ip field. If it is not a valid value, then put an assertion right after assigning it, which states so. — Daniel Daranas
– Daniel Daranas, Commented Apr 20, 2009 at 15:12
NOTE the OP edited the missing line into the question as it was being answered. — ChrisF
– ChrisF, Commented Feb 6, 2012 at 11:41

Jakob Christensen · Accepted Answer · 2009-04-20 14:35:07Z

6

You forgot to call ReadInConfig:

ConfigSIP readIn = new ConfigSIP();
readIn.ReadInConfig();
string sip_ip = readIn.sip_ip();

answered Apr 20, 2009 at 14:35

Jakob Christensen

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2 Comments

ant2009 Over a year ago

Hello, sorry. I was calling ReadInConfig(). when I copied and pasted I must have left it out. I have now edited my code.

Jakob Christensen Over a year ago

In that case my guess is that dt.Rows[0]["Sip_ip"].ToString() is empty. Try setting a breakpoint at that line and see what your datatable contains.

JoshBerke · Accepted Answer · 2009-04-20 14:35:43Z

3

If your code is copied verbatim your client code isn't calling the ReadInConfig() method. So the string will never get populated.

answered Apr 20, 2009 at 14:35

JoshBerke

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