how to call a function in c# which return type is array

public CD[] GetCDCatalog()
{
    XDocument docXML =
    XDocument.Load(Server.MapPath("mydata.xml"));

    var CDs =
      from cd in docXML.Descendants("Table")
      select new CD
      {
          title = cd.Element("title").Value,
          star = cd.Element("star").Value,
          endTime = cd.Element("endTime").Value,

      };
    return CDs.ToArray<CD>();
}

I am calling this function on page load ie. string[] arr = GetCDCatalog(); but this is giving Error Cannot implicitly convert 开发者_高级运维type 'Calender.CD[]' to 'string[]' Please suggetst how can i call function on page load which return type is array.

Your method is declared to return a CD[], and as the compiler has told you, you can't convert from a CD[] to a string[]. Call it like this instead:

CD[] cds = GetCDCatalog();

If you need to convert to a string array then you could use something like this:

string[] cds = GetCDCatalog().Select(x => x.title).ToArray();

Or if you don't really need it in an array, you could just use:

IEnumerable<string> cds = GetCDCatalog().Select(x => x.title);

Change the call in Page.Load to Calender.CD[] arr = GetCDCatalog()

Or use a List:

public List<CD> GetCDCatalog() { XDocument docXML = XDocument.Load(Server.MapPath("mydata.xml"));

    var CDs =
      from cd in docXML.Descendants("Table")
      select new CD
      {
          title = cd.Element("title").Value,
          star = cd.Element("star").Value,
          endTime = cd.Element("endTime").Value,

      };
    return CDs.ToList();
}

The problem is that you are calling it as:

string[] arr = GetCDCatalog();

when GetCDCatalog is returning an array of CD (CD[]).

You need to do:

CD[] arr = GetCDCatalog();