retrieving description item from sql server table column - asp.net

Question

is it possible to retrieve by using connection.getschema() the description item from a sql server table column, just like it's possible to retrieve the column name, data type, is nullable, column default value, etc? if so, how?

Answer 1

Try this:
SELECT
[Table Name] = i_s.TABLE_NAME,
[Column Name] = i_s.COLUMN_NAME,
[Description] = s.value
FROM
INFORMATION_SCHEMA.COLUMNS i_s
LEFT OUTER JOIN
sys.extended_properties s
ON
s.major_id = OBJECT_ID(i_s.TABLE_SCHEMA+'.'+i_s.TABLE_NAME)
AND s.minor_id = i_s.ORDINAL_POSITION
AND s.name = 'MS_Description'
WHERE
OBJECTPROPERTY(OBJECT_ID(i_s.TABLE_SCHEMA+'.'+i_s.TABLE_NAME), 'IsMsShipped')=0
--AND i_s.TABLE_NAME = 'table_name'
ORDER BY
i_s.TABLE_NAME, i_s.ORDINAL_POSITION
edit: fixed the query :-)
HTH

Answer 2

On Sql Server 2005, you can use this system table value function:
fn_listextendedproperty (Transact-SQL)
or try a query, from from this article, like this:
SELECT
[Table Name] = OBJECT_NAME(c.object_id),
[Column Name] = c.name,
[Description] = ex.value
FROM
sys.columns c
LEFT OUTER JOIN
sys.extended_properties ex
ON
ex.major_id = c.object_id
AND ex.minor_id = c.column_id
AND ex.name = 'MS_Description'
WHERE
OBJECTPROPERTY(c.object_id, 'IsMsShipped')=0
-- AND OBJECT_NAME(c.object_id) = 'your_table'
ORDER
BY OBJECT_NAME(c.object_id), c.column_id

Answer 3

If you already have the DataTable, as you mention - look at its data columns!
foreach(DataColumn col in dataTable.Columns)
{
// check out all the properties on the DataColumn
}
Does that contain what you need to have??