private DalManager()
{
_DataAccess = new AzureDataAccess();
}
//This method is used to work with all filters
//Filter options are stored in the generic filters list
//SqlCommand starts with standard beginning of SQL query
//In switch we append to it necessary values,
//value by default is "Any'
public DataTable Filter(List<string> filterList)
{
StringBuilder sqlCommand = new StringBuilder();
sqlCommand.Append("SELECT * FROM [Screener].[dbo].[ScreenerSmall] WHERE ");
for (int i = 0; i < filterList.Count; i++)
{
if (filterList[i] != ANY)
{
switch (i)
{
case (int)FiltersNames.Country:
string insert = "[Country] Like ('%" + filterList[i] + "%') And ";
sqlCommand.Append(insert);
break;
case (int)FiltersNames.Industry:
insert = "[Industry] Like ('%" + filterList[i] + "%') And ";
sqlCommand.Append(insert);
break;
case (int)FiltersNames.Sector:
insert = "[Sector] Like ('%" + filterList[i] + "%') And ";
sqlCommand.Append(insert);
break;
case (int)FiltersNames.Price:
if (filterList[i][0] == UNDER)
{
insert = "[Price] < " +
float.Parse(filterList[i].Remove(REMOVE_ZERO_INDEX,
PRICE_UNDER_AMOUNT_OF_SYMBOLS)) + " And ";
}
else if (filterList[i][0] == OVER)
{
insert = "[Price] > " +
float.Parse(filterList[i].Remove(REMOVE_ZERO_INDEX,
PRICE_OVER_AMOUNT_OF_SYMBOLS)) + " And ";
}
else
{
insert = sqlCommand.ToString();
}
sqlCommand.Append(insert);
break;
case (int)FiltersNames.Date:
insert = "[Date] = '" + filterList[i] + "'";
sqlCommand.Append(insert);
break;
}
}
}
if (sqlCommand[sqlCommand.Length - INDEX] == WHITE_SPACE)
{
sqlCommand.Remove(sqlCommand.Length - REMOVE_START_INDEX, REMOVE_LENGTH);
}
DataAccess data = new DataAccess();
DataSet dataSet = data.SortByFilters(sqlCommand.ToString());
DataTable tables = dataSet.Tables[0];
return tables;
}
//Reading main table from database
public DataTable ReadData()
{
DataAccess dataBase = new DataAccess();
DataTable table = dataBase.ReadData().Tables[0];
return table;
}
//Method for parsing data from csv file to SQL Server database
public void ParseData()
{
TextReader txtReader = new StreamReader(PATH);
DataTable dataTable = new DataTable();
dataTable = CsvParser.Parse(txtReader, true);
DataAccess dataAccess = new DataAccess();
dataAccess.WriteData(dataTable);
}
//This method fills a list of available filters to show their values in the dropdown lists
public string[,] LoadFiltersData()
{
DataAccess dataFilters = new DataAccess();
DataSet dataSetFilters = dataFilters.GetDataFilters();
DataTable dataTable = new DataTable();
//Main table
dataTable = dataSetFilters.Tables[0];
int countRow = 0;
int countColumn = 0;
string[,] listFilters = new string[dataTable.Rows.Count, dataTable.Columns.Count];
//Filling list
foreach (DataRow row in dataTable.Rows)
{
foreach (DataColumn column in dataTable.Columns)
{
if (row[column] != null)
{
listFilters[countRow, countColumn] = Convert.ToString(row[column]);
countColumn++;
}
}
countRow++;
countColumn = 0;
}
return listFilters;
}
public DataTable FindByTicker(string ticker)
{
StringBuilder sqlCommand = new StringBuilder();
sqlCommand.Append("SELECT * FROM [Screener].[dbo].[ScreenerSmall] WHERE ");
string insert = "[Ticker] = '" + ticker + "'";
sqlCommand.Append(insert);
DataAccess data = new DataAccess();
DataSet dataSet = data.SortByFilters(sqlCommand.ToString());
DataTable tables = dataSet.Tables[0];
return tables;
}