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