Lidarr/Marr.Data/Parameters/ParameterChainMethods.cs

125 lines
4.0 KiB
C#

/* 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.Collections.Generic;
using System.Linq;
using System.Text;
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;
}
}
}