Dapper/Dapper/UdtTypeHandler.cs

using System;
using System.Data;

namespace Dapper
{
    public static partial class SqlMapper
    {
        /// <summary>
        /// A type handler for data-types that are supported by the underlying provider, but which need
        /// a well-known UdtTypeName to be specified
        /// </summary>
        public class UdtTypeHandler : ITypeHandler
        {
            private readonly string udtTypeName;
            /// <summary>
            /// Creates a new instance of UdtTypeHandler with the specified <see cref="UdtTypeHandler"/>.
            /// </summary>
            /// <param name="udtTypeName">The user defined type name.</param>
            public UdtTypeHandler(string udtTypeName)
            {
                if (string.IsNullOrEmpty(udtTypeName)) throw new ArgumentException("Cannot be null or empty", udtTypeName);
                this.udtTypeName = udtTypeName;
            }

            object ITypeHandler.Parse(Type destinationType, object value)
            {
                return value is DBNull ? null : value;
            }

            void ITypeHandler.SetValue(IDbDataParameter parameter, object value)
            {
#pragma warning disable 0618
                parameter.Value = SanitizeParameterValue(value);
#pragma warning restore 0618
                if(!(value is DBNull)) StructuredHelper.ConfigureUDT(parameter, udtTypeName);
            }
        }
    }
}