DataReader转DataTable,DataReader转DataSet

转载

/// <summary>
        /// DataReader转DataTable
        /// </summary>
        /// <param name="dataReader"></param>
        /// <returns></returns>
        public static DataTable ConvertDataReaderToDataTable(SqlDataReader dataReader)
        {
            ///定义DataTable
            DataTable datatable = new DataTable();

            try
            {    ///动态添加表的数据列
                for (int i = 0; i < dataReader.FieldCount; i++)
                {
                    DataColumn myDataColumn = new DataColumn();
                    myDataColumn.DataType = dataReader.GetFieldType(i);
                    myDataColumn.ColumnName = dataReader.GetName(i);
                    datatable.Columns.Add(myDataColumn);
                }

                ///添加表的数据
                while (dataReader.Read())
                {
                    DataRow myDataRow = datatable.NewRow();
                    for (int i = 0; i < dataReader.FieldCount; i++)
                    {
                        myDataRow[i] = dataReader[i].ToString();
                    }
                    datatable.Rows.Add(myDataRow);
                    myDataRow = null;
                }
                ///关闭数据读取器
                dataReader.Close();
                return datatable;
            }
            catch (Exception ex)
            {
                ///抛出类型转换错误
                //SystemError.CreateErrorLog(ex.Message);
                throw new Exception(ex.Message, ex);
            }

        }
        /// <summary>
        /// DataReader转DataSet
        /// </summary>
        /// <param name="reader"></param>
        /// <returns></returns>
        public static DataSet ConvertDataReaderToDataSet(SqlDataReader reader)
        {
            DataSet dataSet = new DataSet();
            do
            {
                // Create new data table
                DataTable schemaTable = reader.GetSchemaTable();
                DataTable dataTable = new DataTable();
                if (schemaTable != null)
                {
                    // A query returning records was executed 
                    for (int i = 0; i < schemaTable.Rows.Count; i++)
                    {
                        DataRow dataRow = schemaTable.Rows[i];
                        // Create a column name that is unique in the data table 
                        string columnName = (string)dataRow["ColumnName"]; //+ " // Add the column definition to the data table 
                        DataColumn column = new DataColumn(columnName, (Type)dataRow["DataType"]);
                        dataTable.Columns.Add(column);
                    }
                    dataSet.Tables.Add(dataTable);
                    // Fill the data table we just created
                    while (reader.Read())
                    {
                        DataRow dataRow = dataTable.NewRow();
                        for (int i = 0; i < reader.FieldCount; i++)
                        {
                            dataRow[i] = reader.GetValue(i);
                        }
                        dataTable.Rows.Add(dataRow);
                    }
                }
                else
                {
                    // No records were returned
                    DataColumn column = new DataColumn("RowsAffected");
                    dataTable.Columns.Add(column);
                    dataSet.Tables.Add(dataTable);
                    DataRow dataRow = dataTable.NewRow();
                    dataRow[0] = reader.RecordsAffected;
                    dataTable.Rows.Add(dataRow);
                }
            }
            while (reader.NextResult());
            return dataSet;
        }