SQL Database Query to XML Document

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Hi
I have been following a post by nikhulion and answered by bijeesh. I am a novice at C# and would like to know how to actually compile and run the class resolution by bijeesh.

Code included here with error on assembly; Urgent assistance required please :-)

C#

private void WriteXmlMethod()
{
    string constring = ConfigurationManager.ConnectionStrings ["YourConnectionString"].ToString();
    SqlConnection con = new SqlConnection(constring);
    con.Open();
    string query = "select * from tbl_newsBee";
    SqlCommand cmd = new SqlCommand(query, con);
    SqlDataReader dr = cmd.ExecuteReader();
    XDocument doc = new XDocument();
    XDeclaration declaration = new XDeclaration("1.0", "utf-8", "yes");
    doc.Add(declaration);
    XElement element1 = new XElement("Newses");
    XElement element2 = null;
    while (dr.Read())
    {
        element2 = new XElement("News", new XAttribute("link", dr[2].ToString()), new XAttribute("des", dr[1].ToString()));
        element2.Add(dr[3].ToString());
        element1.Add(element2);
    }
    con.Close();
    string filename = Server.MapPath("E:/myXmlDoc.xml");
    doc.Save(filename);
}

Error that occurred:
The type 'System.ComponentModel.Component' is defined in an assembly that is not referenced.
You must add a reference to assembly:
'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' in:
C:\Users\Administrator\Documents\Visual Studio 2010\Projects\WtiteXml.cs
Line: 13
Column: 9
Other Info: TestXML

Edit by EdMan196: Added pre tags/formatting in general and made error message a bit more readable.

Posted 22-Feb-12 10:43am

becket_c

Updated 22-Feb-12 10:52am

Ed Nutting

v2

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Ed Nutting · Answer 1 · 2012-02-22T10:58:00

Well the error says you have a reference missing so whatever you are using to compile the code (Visual Studio Solution/Project?). Whatever you are using you will need to add a reference to the library - what this means is you are telling the compiler where the system code library that your class needs to be compiled with, is. In Visual Studio it's very easy:

1. Right click on your project
2. Click "add Reference"
3. Go to the .Net tab
4. Find the item named (specifically) "System.ComponentModel.Component" or if that doesn't exist just add the "System.ComponentModel" one (which should exist). You may have to add the latter reference because System.ComponentModel.Component may be contained within the System.ComponentModel compiled code library (dll for file name).

Hope this helps,
Ed