SqlBulkCopy Not Working

Question

I have a DataSet populated from Excel Sheet. I wanted to use SQLBulk Copy to Insert Records in Lead_Hdr table where LeadId is PK.

Answer 1

I would go with the staging idea, however here is my approach to handling the case sensitive nature. Happy to be critiqued on my linq

using (SqlConnection connection = new SqlConnection(conn_str))
{
        connection.Open();
        using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
        {
            bulkCopy.DestinationTableName = string.Format("[{0}].[{1}].[{2}]", targetDatabase, targetSchema, targetTable);
            var targetColumsAvailable = GetSchema(conn_str, targetTable).ToArray();
            foreach (var column in dt.Columns)
            {
                if (targetColumsAvailable.Select(x => x.ToUpper()).Contains(column.ToString().ToUpper()))
                {
                    var tc = targetColumsAvailable.Single(x => String.Equals(x, column.ToString(), StringComparison.CurrentCultureIgnoreCase));
                    bulkCopy.ColumnMappings.Add(column.ToString(), tc);
                }
            }

            // Write from the source to the destination.
            bulkCopy.WriteToServer(dt);
            bulkCopy.Close();
        }
}

and the helper method

private static IEnumerable GetSchema(string connectionString, string tableName)
        {



   using (SqlConnection connection = new SqlConnection(connectionString))
        using (SqlCommand command = connection.CreateCommand())
        {
            command.CommandText = "sp_Columns";
            command.CommandType = CommandType.StoredProcedure;

            command.Parameters.Add("@table_name", SqlDbType.NVarChar, 384).Value = tableName;

            connection.Open();
            using (var reader = command.ExecuteReader())
            {
                while (reader.Read())
                {
                    yield return (string)reader["column_name"];
                }
            }
        }
    }