/// <summary>
/// Select row from table in database.
/// </summary>
/// <param name="tableNames">Table names.</param>
/// <param name="columnNames">List of column names to be selected.</param>
/// <param name="limit">Number of rows to be selected.</param>
/// <param name="startRow">Starting row to be selected.</param>
/// <param name="clauses">List of where clauses as clause statement.</param>
/// <param name="joins">List of join clauses as join statement.</param>
/// <param name="groupColumn">Group selected rows by column(s) name(s).</param>
/// <param name="orderColumn">Sort selected rows by column(s) name(s).</param>
/// <param name="orderIsDesc">Sort selected rows descendingly.</param>
public List <Dictionary <string, Object> > Select(string tableNames, string[] columnNames, int limit = 0, int startRow = 0,
List <Clauses.Where> clauses = null, List <Clauses.Join> joins = null, string groupColumn = null,
string orderColumn = null, bool orderIsDesc = false)
{
var result = new List <Dictionary <string, Object> >();
if (columnNames.Length > 0 && !String.IsNullOrEmpty(tableNames))
{
using (var command = this.Connection.CreateCommand())
{
string queryString = @"SELECT " + (String.Join(", ", columnNames)).ToUpper();
queryString += @" FROM " + tableNames.ToUpper();
if (joins != null)
{
string joinedClauses = "";
for (int ll = 0; ll < joins.Count; ll++)
{
var joinClause = joins[ll];
joinedClauses += @" LEFT JOIN ";
joinedClauses += joinClause.FirstTableName;
joinedClauses += @" ON ";
joinedClauses += joinClause.FirstTableName + @"." + joinClause.FirstTableColumn;
joinedClauses += @"=";
joinedClauses += joinClause.SecondTableName + @"." + joinClause.SecondTableColumn;
if (ll < (joins.Count - 1))
{
joinedClauses += @" ";
}
joinedClauses += " ";
}
queryString += joinedClauses.ToLower();
}
if (clauses != null && clauses.Count > 0)
{
string whereClause = " WHERE ";
for (int ii = 0; ii < clauses.Count; ii++)
{
var clause = clauses[ii];
if (ii > 0)
{
whereClause += @" " + clause.Concenator;
}
if (clause.Comparator.ToLower().Contains("in"))
{
if (clause.Value.GetType() == typeof(string[]))
{
var rawValues = clause.Value as string[];
whereClause += @" " + clause.Column.ToUpper() + @" " + clause.Comparator.ToUpper() + " ('" + String.Join("','", rawValues) + @"')";
}
else
{
string value = Convert.ToString(clause.Value);
whereClause += @" " + clause.Column.ToUpper() + @" " + clause.Comparator +
@" " + value + @"";
}
}
else
{
string value = Convert.ToString(clause.Value);
if (clause.Value.GetType() == typeof(DateTime))
{
value = Orathine.ConvertToOracleDateFormat((DateTime)clause.Value);
}
if (clause.Comparator.ToLower().Contains("like") && value.ToLower().Contains("where") && value.ToLower().Contains("select"))
{
whereClause += @" " + clause.Column.ToUpper() + @" " + clause.Comparator +
@" " + value + @"";
}
else
{
whereClause += @" lower(" + clause.Column.ToUpper() + @") " + clause.Comparator +
@" lower('" + value + @"')";
}
}
}
queryString += whereClause;
}
if (limit > 0)
{
if (clauses == null)
{
queryString += @" WHERE ";
}
else
{
queryString += @" AND ";
}
queryString += @" ROWNUM <= " + (limit * (startRow + 1));
}
if (startRow > 0)
{
if (clauses == null && limit <= 0)
{
queryString += @" WHERE ";
}
else
{
queryString += @" AND ";
}
queryString += @" ROWNUM >= " + (limit * (startRow - 1));
}
if (!String.IsNullOrEmpty(groupColumn))
{
queryString += @" GROUP BY " + groupColumn;
}
if (!String.IsNullOrEmpty(orderColumn))
{
queryString += @" ORDER BY " + orderColumn;
}
if (orderIsDesc == true)
{
queryString += @" DESC";
}
command.CommandType = CommandType.Text;
command.CommandText = queryString;
try
{
//System.IO.File.AppendAllText(@"C:\inetpub\wwwroot\Debug\OrathineQuerySelect.txt", DateTime.Now.ToString() + " | " + queryString + "\r\n");
using (var reader = command.ExecuteReader())
{
while (reader.Read())
{
var rowData = new Dictionary <string, Object>(StringComparer.InvariantCultureIgnoreCase);
for (int ll = 0; ll < columnNames.Length; ll++)
{
string columnName = columnNames[ll].ToUpper().Replace("DISTINCT", "").Trim();
rowData.Add(columnName, reader.GetValue(ll));
}
result.Add(rowData);
}
}
}
catch (OracleException ex)
{
// You can use Console Write or System IO for debugging purpose
// Console.WriteLine(ex.Message);
//System.IO.File.WriteAllText(@"C:\inetpub\wwwroot\Debug\OrathineErrorSelect.txt", ex.Message);
}
}
}
return(result);
}
/// <summary>
/// Insert row to table in database.
/// </summary>
/// <param name="tableName">Table name.</param>
/// <param name="newValues">List of save clauses consists of column name and values.</param>
/// <param name="returningColumnName">Column name's value to be returned after save.</param>
public string Insert(string tableName, List <Clauses.Save> newValues, string returningColumnName)
{
string result = null;
if (newValues.Count > 0 && !String.IsNullOrEmpty(tableName))
{
using (var command = this.Connection.CreateCommand())
{
string queryString = @"INSERT INTO " + tableName.ToUpper();
string insertColumns = " ";
string insertValues = " ";
for (int jj = 0; jj < newValues.Count; jj++)
{
var newValue = newValues[jj];
if (jj == 0)
{
insertColumns += @"(";
insertValues += @"VALUES(";
}
else if (jj > 0)
{
insertColumns += @", ";
insertValues += @", ";
}
string value = Convert.ToString(newValue.Value);
if (string.IsNullOrEmpty(value))
{
insertValues += @"null";
}
else
{
if (newValue.Value.GetType() == typeof(DateTime))
{
value = Orathine.ConvertToOracleDateFormat((DateTime)newValue.Value);
}
insertValues += @"'" + value + @"'";
}
insertColumns += newValue.Column.ToUpper();
if (jj == (newValues.Count - 1))
{
insertColumns += @")";
insertValues += @")";
}
}
queryString += insertColumns + insertValues;
queryString += @" RETURNING " + returningColumnName + " INTO :resultID";
var resultID = new OracleParameter(":resultID", OracleType.VarChar);
resultID.Size = 50;
resultID.Direction = ParameterDirection.Output;
command.Parameters.Add(resultID);
command.CommandType = CommandType.Text;
command.CommandText = queryString;
using (var transaction = this.Connection.BeginTransaction(IsolationLevel.ReadCommitted))
{
try
{
command.Transaction = transaction;
//System.IO.File.AppendAllText(@"C:\inetpub\wwwroot\Debug\OrathineQueryInsert.txt", DateTime.Now.ToString() + " | " + queryString + "\r\n");
int rowAffected = command.ExecuteNonQuery();
transaction.Commit();
result = resultID.Value.ToString();
}
catch (OracleException ex)
{
transaction.Rollback();
// You can use Console Write or System IO for debugging purpose
// Console.WriteLine(ex.Message);
//System.IO.File.WriteAllText(@"C:\inetpub\wwwroot\Debug\OrathineErrorInsert.txt", ex.Message);
}
}
}
}
return(result);
}
/// <summary>
/// Delete row in table in database.
/// </summary>
/// <param name="tableName">Table name.</param>
/// <param name="clauses">List of where clauses as clause statement.</param>
public int Delete(string tableName, List <Clauses.Where> clauses = null)
{
int result = 0;
if (!String.IsNullOrEmpty(tableName))
{
using (var command = this.Connection.CreateCommand())
{
string queryString = @"DELETE FROM " + tableName.ToUpper();
if (clauses != null && clauses.Count > 0)
{
string whereClause = " WHERE ";
for (int ii = 0; ii < clauses.Count; ii++)
{
var clause = clauses[ii];
if (ii > 0)
{
whereClause += @" " + clause.Concenator;
}
if (clause.Comparator.ToLower().Contains("in"))
{
if (clause.Value.GetType() == typeof(string[]))
{
var rawValues = clause.Value as string[];
whereClause += @" " + clause.Column.ToUpper() + @" " + clause.Comparator.ToUpper() + " ('" + String.Join("','", rawValues) + @"')";
}
else
{
string value = Convert.ToString(clause.Value);
whereClause += @" " + clause.Column.ToUpper() + @" " + clause.Comparator +
@" " + value + @"";
}
}
else
{
string value = Convert.ToString(clause.Value);
if (clause.Value.GetType() == typeof(DateTime))
{
value = Orathine.ConvertToOracleDateFormat((DateTime)clause.Value);
}
whereClause += @" lower(" + clause.Column.ToUpper() + @") " + clause.Comparator +
@" lower('" + value + @"')";
}
}
queryString += whereClause;
}
command.CommandType = CommandType.Text;
command.CommandText = queryString;
using (var transaction = this.Connection.BeginTransaction(IsolationLevel.ReadCommitted))
{
try
{
command.Transaction = transaction;
//System.IO.File.AppendAllText(@"C:\inetpub\wwwroot\Debug\OrathineQueryDelete.txt", DateTime.Now.ToString() + " | " + queryString + "\r\n");
int rowAffected = command.ExecuteNonQuery();
transaction.Commit();
result = rowAffected;
}
catch (OracleException ex)
{
transaction.Rollback();
// You can use Console Write or System IO for debugging purpose
// Console.WriteLine(ex.Message);
//System.IO.File.WriteAllText(@"C:\inetpub\wwwroot\Debug\OrathineErrorDelete.txt", ex.Message);
}
}
}
}
return(result);
}
