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copied!<p>I've finally done this myself and putting it here if someone else need it.</p> <pre><code>DataTable dtReturn = new DataTable(); var connection = new SqlConnection((_connectionstring.IndexOf("MultipleActiveResultsets") == -1) ? _connectionstring + "MultipleActiveResultsets=True;" : _connectionstring); try { connection.Open(); Task<DataTable>[] tasks = new Task<DataTable>[source.Rows.Count]; for (int i = 0; i < source.Rows.Count; i++) { int s = Convert.ToInt32(source.Rows[i][0]); Task<DataTable> t = Task.Factory.StartNew(() => { var command = connection.CreateCommand(); command.CommandText = commandText; command.CommandType = CommandType.StoredProcedure; command.CommandTimeout = timeout; foreach (SqlParameter p in parms) { if (p.ParameterName == "@Sources") command.Parameters.Add(new SqlParameter() { SqlDbType = System.Data.SqlDbType.Structured, ParameterName = p.ParameterName, Value = s.ToString().ToIDList() }); else command.Parameters.Add(new SqlParameter() { ParameterName = p.ParameterName, Value = p.Value }); } var dr = command.ExecuteReader(); command.Parameters.Clear(); DataTable dt = new DataTable(); if (dr.HasRows) { dt.Load(dr); dr.Close(); } return dt; }); tasks[i] = t; } Task.WaitAll(tasks); if (tasks.Length > 0) { bool isSchemaCloned = false; foreach (var t in tasks) { if (!isSchemaCloned && t.Result.Columns.Count > 0 ) { dtReturn = t.Result.Clone(); isSchemaCloned = true; } foreach (DataRow r in t.Result.Rows) { dtReturn.Rows.Add(r.ItemArray); } } } } catch (Exception ex) { throw ex; } finally { if (connection.State != ConnectionState.Closed) connection.Close(); } return dtReturn; </code></pre>

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