如何实例化sqlmap 把Sqlmap.config放到Web应用程序的根目录下与Web.config同级

首先把sqlmap.config以及其相关的文件放到与Web.config同级得web应用程序的根目下。 参考查看Ibatis 的源代码，mapper.cs实例化sqlmap即可，贴下代码：

using IBatisNet.Common.Utilities;
using IBatisNet.DataMapper;
using IBatisNet.DataMapper.Configuration;

namespace IBatisNet.DataMapper
{
    /// <summary>
    /// A singleton class to access the default SqlMapper defined by the SqlMap.Config
    /// </summary>
    public sealed class Mapper
    {
        #region Fields
        private static volatile ISqlMapper _mapper = null;
        #endregion

        /// <summary>
        /// 
        /// </summary>
        /// <param name="obj"></param>
        public static void Configure (object obj)
        {
            _mapper = null;
        }

        /// <summary>
        /// Init the 'default' SqlMapper defined by the SqlMap.Config file.
        /// </summary>
        public static void InitMapper()
        {
            ConfigureHandler handler = new ConfigureHandler (Configure);
            DomSqlMapBuilder builder = new DomSqlMapBuilder();
            _mapper = builder.ConfigureAndWatch (handler);        }

        /// <summary>
        /// Get the instance of the SqlMapper defined by the SqlMap.Config file.
        /// </summary>
        /// <returns>A SqlMapper initalized via the SqlMap.Config file.</returns>
        public static ISqlMapper Instance()
        {
            if (_mapper == null)
            {
                lock (typeof (SqlMapper))
                {
                    if (_mapper == null) // double-check
                    {    
                        InitMapper();
                    }
                }
            }
            return _mapper;
        }
        
        /// <summary>
        /// Get the instance of the SqlMapper defined by the SqlMap.Config file. (Convenience form of Instance method.)
        /// </summary>
        /// <returns>A SqlMapper initalized via the SqlMap.Config file.</returns>
        public static ISqlMapper Get()
        {
            return Instance();
        }
    }
}

解释说明：

关键代码：

        /// <summary>
        /// Init the 'default' SqlMapper defined by the SqlMap.Config file.
        /// </summary>
        public static void InitMapper()
        {
            ConfigureHandler handler = new ConfigureHandler (Configure);
            DomSqlMapBuilder builder = new DomSqlMapBuilder();
            _mapper = builder.ConfigureAndWatch (handler);        
        }

然后我再看下ConfigureAndWatch这个方法：

public ISqlMapper ConfigureAndWatch(ConfigureHandler configureDelegate)
        {
            return ConfigureAndWatch( DEFAULT_FILE_CONFIG_NAME, configureDelegate ) ;

public ISqlMapper ConfigureAndWatch( string resource, ConfigureHandler configureDelegate )
        {
            XmlDocument document = null;
            if (resource.StartsWith("file://"))
            {
                document = Resources.GetUrlAsXmlDocument( resource.Remove(0, 7) );    
            }
            else
            {
                document = Resources.GetResourceAsXmlDocument( resource );    
            }

            ConfigWatcherHandler.ClearFilesMonitored();
            ConfigWatcherHandler.AddFileToWatch( Resources.GetFileInfo( resource ) );

            TimerCallback callBakDelegate = new TimerCallback( OnConfigFileChange );

            StateConfig state = new StateConfig();
            state.FileName = resource;
            state.ConfigureHandler = configureDelegate;
            
            ISqlMapper sqlMapper = Build( document, true );
            
            new ConfigWatcherHandler( callBakDelegate, state );

            return sqlMapper;
        }

其中：    public const string DEFAULT_FILE_CONFIG_NAME = "SqlMap.config";

最后通过

if (resource.StartsWith("file://"))
            {
                document = Resources.GetUrlAsXmlDocument( resource.Remove(0, 7) );    
            }
            else
            {
                document = Resources.GetResourceAsXmlDocument( resource );    
            }

            ConfigWatcherHandler.ClearFilesMonitored();
            ConfigWatcherHandler.AddFileToWatch( Resources.GetFileInfo( resource ) );

   private static string _applicationBase = AppDomain.CurrentDomain.SetupInformation.ApplicationBase;

        /// <summary>
        /// Get XmlDocument from relative (from root directory of the application) path resource
        /// </summary>
        /// <param name="resource"></param>
        /// <returns></returns>
        public static XmlDocument GetResourceAsXmlDocument(string resource)
        {
            XmlDocument config = new XmlDocument();

            try 
            {
                config.Load( Path.Combine(_applicationBase, resource) );
            }
            catch(Exception e)
            {
                throw new ConfigurationException(
                    string.Format("Unable to load file via resource \"{0}\" as resource. Cause : {1}", 
                    resource, 
                    e.Message ) ,e); 
            }

            return config;
        }

就能取到WEB应用程序根目录下的sqlmap.config。

从而实例化SqlMapper.