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r3nderFlag for United States of America

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Convert Generic list to data

I am getting an error when I try to use a data class to retrieve data that I store in a list

it says Cannot implicitly convert type 'System.Collections.Generic.List<MessageBoard.Data.MessageData>' to 'MessageBoard.Data.MessageData

Data.Message m = new Data.Message();
                Data.MessageData md = m.GetEditThread(ID);
                //List<Data.MessageData> md = new List<Data.MessageData>();
                //List<Data.MessageData> md = m.GetEditThread(ID);
                lblPostID.Text = md.id;
                radtxtBody = md.Body;
                radtxtSubject = md.Subject;

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I have my sql statement and my reader to add each item to the stubs in Message and my stubs in message data

This is message data
    public class MessageData
    {
         public MessageData()
        {
 
        }
        public int id { get; set; }
        public string Subject { get; set; }
        public string Body { get; set;}
        public int File_Id {get; set;}
        public bool ForPublic {get;set;}
        public bool ForPrivate {get;set;}
        public bool ForKKOnly {get;set;}
        public int UserID {get;set;}
        public int PriorityID {get;set;}
    }

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This is Message
    class Message
    {
        public List<MessageData> GetEditThread(int ID)
        {
            List<MessageData> list = new List<MessageData>();

            
            string sql;
            sql = "Select id,Subject, Body,File_Id,ForPublic,ForKKOnly, ForPrivate,UserID,PriorityID FROM MsgPost Where id = '" + ID + "'";


            using (SqlConnection conn = new SqlConnection(DBConnectionString.Get(Database.Task)))
            {
                SqlCommand cmd = new SqlCommand(sql, conn);
                cmd.CommandType = System.Data.CommandType.Text;

                conn.Open();

                SqlDataReaderHelper reader = new SqlDataReaderHelper(cmd.ExecuteReader());
                if (reader.IsValid)
                {
                    while (reader.Read())
                    {
                        list.Add(new MessageData()
                        {
                            ID = reader.GetInt("ID", 0),
                            Subject = reader.GetString("Subject", ""),
                            Body = reader.GetString("Body", ""),
                            File_Id = reader.GetInt("File_Id", 0),
                            ForPublic = reader.GetBool("ForPublic", false),
                            ForPrivate = reader.GetBool("ForPrivate", false),
                            ForKKOnly = reader.GetBool("ForKKOnly", false),
                            UserID = reader.GetInt("UserID", 0),
                            PriorityID = reader.GetInt("PriorityID", 0),
                        });
                    }
                }
                conn.Close();
            }
            return list;
        }

    
    }

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Avatar of Haver Ramirez
Haver Ramirez

try

List<Data.MessageData> md = new List<Data.MessageData>();
md.AddRange = m.GetEditThread(ID);

List<Data.MessageData> md = new List<Data.MessageData>(m.GetEditThread(ID));

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A list contains none, one or many individual items.
It is like a shelf with numbers of books on it - you don't read the shelf, you take one book away and read that.

You take an item out of the list and process that item.
my mistake;

md.AddRange(m.GetEditThread(ID));
//or 
List<Data.MessageData> md = new List<Data.MessageData>(m.GetEditThread(ID));

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Avatar of r3nder

ASKER

does not contain a definition for subject
                Data.Message m = new Data.Message();
                List<Data.MessageData> md = new List<Data.MessageData>(m.GetEditThread(ID)); 
                lblPostID.Text = Convert.ToString(md.id);
                radtxtBody.Text = md.Body;
                radtxtSubject.Text = md.Subject;

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?
What has that got to do with your original error when you attempted to cast a list of items to an individual item
you are using a List, you must use items, not the LIST in self

Data.Message m = new Data.Message();
List<Data.MessageData> md = new List<Data.MessageData>(m.GetEditThread(ID)); 
if (md.Count > 0)
{
lblPostID.Text = Convert.ToString(md[0].id);
radtxtBody.Text = md[0].Body;
radtxtSubject.Text = md[0].Subject;
}

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Avatar of r3nder

ASKER

that means the suggested solution didnt work - I was doing that all day long - and to be honest Andy I dont need analogies or a life lesson in coding or someone with the mentality that they are a guru - II come here for actual help - Crashman was kiind enough to offer - you are not
IMHO
R
Before you criticise you should read my comment.
I told you EXACTLY why your original code failed AND what to do to correct it.
ASKER CERTIFIED SOLUTION
Avatar of Haver Ramirez
Haver Ramirez

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Avatar of r3nder

ASKER

@Andy
no you told me about a bookshelf
@Crashman
Worked perfect - now I realize its alot like a dataset - thank you
Avatar of r3nder

ASKER

Thank you Crashman - with a little practice I should be able to get this down :)
A list contains none, one or many individual items.
...
You take an item out of the list and process that item.


see the comment you selected as an answer as you did not understand that.