/* Copyright (C) 2008 - 2011 Jordan Marr This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library. If not, see <http://www.gnu.org/licenses/>. */ using System; using System.Data; using System.Data.Common; using Marr.Data.Converters; namespace Marr.Data.Parameters { /// <summary> /// This class allows chaining methods to be called for convenience when adding a parameter. /// </summary> public class ParameterChainMethods { /// <summary> /// Creates a new parameter and adds it to the command's Parameters collection. /// </summary> /// <param name="command">The command that the parameter will be added to.</param> /// <param name="parameterName">The parameter name.</param> public ParameterChainMethods(DbCommand command, string parameterName, object value) { Parameter = command.CreateParameter(); Parameter.ParameterName = parameterName; // Convert null to DBNull.Value if (value == null) value = DBNull.Value; Type valueType = value.GetType(); // Check for a registered IConverter IConverter converter = MapRepository.Instance.GetConverter(valueType); if (converter != null) { Parameter.Value = converter.ToDB(value); } else { Parameter.Value = value; } //// Determine the correct DbType based on the passed in value type //IDbTypeBuilder typeBuilder = MapRepository.Instance.DbTypeBuilder; //Enum dbType = typeBuilder.GetDbType(valueType); //// Set the appropriate DbType property depending on the parameter type //typeBuilder.SetDbType(Parameter, dbType); command.Parameters.Add(Parameter); } /// <summary> /// Gets a reference to the parameter. /// </summary> public IDbDataParameter Parameter { get; private set; } /// <summary> /// Sets the direction of a parameter. /// </summary> /// <param name="direction">Determines the direction of a parameter.</param> /// <returns>Return a ParameterChainMethods object.</returns> public ParameterChainMethods Direction(ParameterDirection direction) { Parameter.Direction = direction; return this; } /// <summary> /// Sets the direction of a parameter to 'Output'. /// </summary> /// <returns></returns> public ParameterChainMethods Output() { Parameter.Direction = ParameterDirection.Output; return this; } public ParameterChainMethods DBType(DbType dbType) { Parameter.DbType = dbType; return this; } public ParameterChainMethods Size(int size) { Parameter.Size = size; return this; } public ParameterChainMethods Precision(byte precision) { Parameter.Precision = precision; return this; } public ParameterChainMethods Scale(byte scale) { Parameter.Scale = scale; return this; } public ParameterChainMethods Name(string name) { Parameter.ParameterName = name; return this; } } }