private int[] dbRetrieveMove(string boardState)
{
// String to select the entry in the data base with the boardstate if it exists.
string selectSQL = "SELECT TOP 1 * FROM ChessTable WHERE BoardState='" + boardState + "' AND Depth ='" + BoardDepth + "'";
// Get the DataTable resulting from the select query.
DataTable tbl = ChessDB.GetDataTable(selectSQL);
// Initialize bestMove.
int[] bestMove = new int[2]; bestMove[0] = 0; bestMove[1] = 0;
// Condtion to test if the query had a result.
if (tbl.Rows.Count != 0)
{
// Get the Moves string.
string dbMoves = tbl.Rows[0]["Moves"].ToString();
string[] MoveSplit = dbMoves.Split("Black".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
string moveS;
// Condition to test which players turn it is.
if (ChessBoard.BoardState.WhitesMove)
{
// Declare and initialize moveS to be a possible white move.
moveS = MoveSplit[0].Trim("White ".ToCharArray());
}
else
{
// Declare and initialize moveS to be a possible black move.
moveS = MoveSplit[1].Trim();
}
// Conditon to test if moveS has a move.
if (moveS.Length > 0)
{
// Set bestMove to the move found in the database.
int[] Moves = moveS.Split(' ').Select(m => int.Parse(m)).ToArray();
string moveStr = "Player: " + ChessBoard.BoardState.WhitesMove + " bestMoves ";
foreach (int i in Moves)
{
moveStr += i + " ";
}
Console.WriteLine(moveStr);
// Delare Random to find a random best move.
Random rng = new Random();
// Get a random index of a best move.
int index = rng.Next(Moves.Length / 2);
// Set the best move.
bestMove[0] = Moves[(index * 2)]; bestMove[1] = Moves[(index * 2) + 1];
// Return bestMove.
return(bestMove);
}
}
return(bestMove);// Return bestMove.
}
// Method to update the Chess Database.
private string dbUpdateAddRecord(string boardState, int Depth, string Moves)
{
// String to select the entry in the data base with the boardstate if it exists.
string selectSQL = "SELECT TOP 1 * FROM ChessTable WHERE BoardState='" + boardState + "' AND Depth ='" + Depth + "'";
// Get the DataTable resulting from the select query.
DataTable tbl = ChessDB.GetDataTable(selectSQL);
// Declare insertSQL string to hold the insert query.
string insertSQL = "";
// Condition to test if the data table has entries. The boardState has been entered before.
if (tbl.Rows.Count == 0)
{
// Condition to test whos move is being entered.
if (ChessBoard.BoardState.WhitesMove)
{
insertSQL = "INSERT INTO ChessTable(BoardState, Depth, Moves) VALUES('" + boardState + "', '" + Depth + ("', 'White " + Moves + "Black") + "')"; // Insert White move.
}
else
{
insertSQL = "INSERT INTO ChessTable(BoardState, Depth, Moves) VALUES('" + boardState + "', '" + Depth + ("', 'White " + "Black " + Moves) + "')"; // Insert Black move.
}
// Execute the INSERT.
ChessDB.ExecuteSQL(insertSQL);
tbl = ChessDB.GetDataTable(selectSQL);
return(tbl.Rows[0]["Moves"].ToString());
}
else
{
// Get the Moves string to be updated.
string dbMoves = tbl.Rows[0]["Moves"].ToString();
// Declare MoveSplit string array to hold the split of the two players moves.
string[] MoveSplit = dbMoves.Split("Black".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
// Declare string to hold the SQL UPDATE query
string updateSQL = "";
// Condtion to test whos move will be updated.
if (ChessBoard.BoardState.WhitesMove)
{
updateSQL = "UPDATE ChessTable SET Moves = '" + ("White " + Moves + " Black" + MoveSplit[1]) + "' WHERE BoardState = '" + boardState + "'"; // UPDATE White move.
Console.WriteLine($"White Move UPDATE: {("White " + Moves + " Black" + MoveSplit[1])}");
}
else
{
updateSQL = "UPDATE ChessTable SET Moves = '" + (MoveSplit[1] + "Black " + Moves) + "' WHERE BoardState = '" + boardState + "'"; // UPDATE Black move.
Console.WriteLine($"Black Move UPDATE: {(MoveSplit[1] + "Black " + Moves)}");
}
}
return(tbl.Rows[0]["Moves"].ToString());
}