using System;
using System.Data;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.Text;
// ReSharper disable once CheckNamespace
namespace DSWeb.SoftMng.DBUtility
{
    public class DbHelperMdfSQL
    {
        //本地MDB数据库连接
        public static DataSet Query(string version,string path)
        {
            try
            {
                //创建一个 OleDbConnection对象 
                string strCon = "Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = "+ path + "\\update.mdb";
                OleDbConnection myConn = new OleDbConnection(strCon);

                //创建一个 DataSet对象 
                var myDataSet = new DataSet();
                myConn.Open();
                //获取sql语句
                string strCom = " SELECT * FROM t_sql where [版本号]>" + version + "";
                OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, myConn);
                myCommand.Fill(myDataSet, "t_sql");
                //获取视图语句
                string strCom1 = " SELECT * FROM t_view_update where [顺序]>" + version + "";
                myCommand = new OleDbDataAdapter(strCom1, myConn);
                myCommand.Fill(myDataSet, "t_view_update");

                myConn.Close();
                return myDataSet;
            }
            catch (Exception ex)
            {
                return new DataSet();
            }
        }
        /// <summary>
        /// DataReader To DataSet 
        /// </summary>
        /// <param name="reader"></param>
        /// <returns></returns>
        public 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;
        }
    }
}