public List <Constraint> GetConstraintForTable(DatabaseTable table)
{
List <Constraint> constraints = new List <Constraint>();
string sql = string.Format(@" SELECT
is_primary_key AS IsPrimaryKey
, is_unique_constraint AS IsUnique
, OBJECT_NAME(i.object_id) AS TableName
, c.name AS ColumnName
, TYPE_NAME(c.system_type_id) AS DataType
, c.is_identity AS IsIdentity
, i.name AS ConstraintName
, ic.index_id AS IndexId
FROM
sys.indexes I
INNER JOIN sys.index_columns ic
ON i.object_id = ic.object_id AND I.index_id = ic.index_id
INNER JOIN sys.columns c
ON i.object_id = c.object_id AND ic.column_id = c.column_id
WHERE
i.object_id = OBJECT_ID('{0}')
AND is_included_column = 0
and Is_Disabled = 0
ORDER BY
IndexId" , table.FullName);
using (SqlDataAdapter ad = CommandFactory.CreateAdapter(sql))
{
ad.SelectCommand.Connection.Open();
DataSet ds = new DataSet();
ad.Fill(ds);
DataTable tbl = ds.Tables[0];
int prevConstraint = -1;
for (int i = 0; i < tbl.Rows.Count; i++)
{
Constraint cons = new Constraint();
if (prevConstraint == -1 || prevConstraint != tbl.Rows[i].Field <int>("IndexId"))
{
cons.IsPrimaryKey = tbl.Rows[i].Field <bool>("IsPrimaryKey");
cons.IsUnique = tbl.Rows[i].Field <bool>("IsUnique");
cons.ConstraintName = tbl.Rows[i].Field <string>("ConstraintName");
cons.IndexId = tbl.Rows[i].Field <int>("IndexId");
constraints.Add(cons);
prevConstraint = tbl.Rows[i].Field <int>("IndexId");
}
// Add all columns in the index
// First the first column
cons.Columns.Add(new Column
{
ColumnName = tbl.Rows[i].Field <string>("ColumnName"),
DataType = tbl.Rows[i].Field <string>("DataType"),
IsIdentity = tbl.Rows[i].Field <bool>("IsIdentity")
});
if (i + 1 == tbl.Rows.Count)
{
break;
}
// Then the rest of the columns, if there are any
while (tbl.Rows[i + 1].Field <int>("IndexId") == prevConstraint)
{
i++;
cons.Columns.Add(new Column
{
ColumnName = tbl.Rows[i].Field <string>("ColumnName"),
DataType = tbl.Rows[i].Field <string>("DataType"),
IsIdentity = tbl.Rows[i].Field <bool>("IsIdentity")
});
if (i + 1 == tbl.Rows.Count)
{
break;
}
}
}
ad.SelectCommand.Connection.Close();
}
return(constraints);
}
