The index outside of the range Exception

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I would be grateful if you could help me to solve the problem.
Im tring to fill my list on Visual Studio side with help of stored procedure.
I'm using the following stored procedure:

SQL

CREATE PROCEDURE [dbo].[GetColletcion]
AS
BEGIN   
    select  CollectionType.Name ,GlassesCollection.Name 
    from    GlassesCollection
    inner join CollectionType
    on GlassesCollection.CollectionType=CollectionType.CollTypeID
END

Here's the code-behind:

C#

protected void Button1_Click(object sender, EventArgs e)
        {
            List<GlassesCollection> list = new List<GlassesCollection>();
            using (SqlConnection conn = new SqlConnection("Server=(local);DataBase=ISeeOptic;Integrated Security=SSPI"))
            {
                GlassesCollection gln = new GlassesCollection();
                SqlCommand cmd = new SqlCommand();
                SqlDataReader reader;
                cmd.Connection = conn;
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.CommandText = "GetColletcion";
                conn.Open();
                reader = cmd.ExecuteReader();
                  while (reader.Read())
                    {
                    gln.Name = (string)reader["CollectionType.Name"];
                    gln.CollectionType = (string)reader["GlassesCollection.Name"];
                    list.Add(gln);
                    }

                reader.Close();
                conn.Close();
            }
        }

But when it comes to this row:

C#

gln.Name = (string)reader["CollectionType.Name"];

I get this Exception:

Exception Details: System.IndexOutOfRangeException: CollectionType.Name
The index outside of the range, although in database more than one record. How can i solve my problem.

Please help me.

Regards

Posted 4-Jan-12 3:31am

Mich_90

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darkDercane · Accepted Answer · 2012-01-04T03:36:00

first check if your SP (Stored procedure) is returning any results.
Secondly, try to change the line:

C#

gln.Name = (string)reader["CollectionType.Name"];

for

C#

gln.Name = (string)reader["Name"];

And if the previus solutions don't work, obviously the name of the returned data is givin you an error, so try to use a Alias for each column of your SP, for example:

SQL

CREATE PROCEDURE [dbo].[GetColletcion]
AS
BEGIN
select  CollectionType.Name ,GlassesCollection.Name
from    GlassesCollection
inner join CollectionType
on GlassesCollection.CollectionType=CollectionType.CollTypeID
END

change to

SQL

CREATE PROCEDURE [dbo].[GetColletcion]
AS
BEGIN
select  CollectionType.Name AS CollectionName ,GlassesCollection.Name AS GlassesName
from    GlassesCollection
inner join CollectionType
on GlassesCollection.CollectionType=CollectionType.CollTypeID
END

and modify your mapping like this:

C#

gln.Name = (string)reader["GlassesName"];

Cheers :D