From d2ee19c45bddece7be32ce6083fc90fdaff82f8d Mon Sep 17 00:00:00 2001
From: Marc Gravell <marc.gravell@gmail.com>
Date: Wed, 2 Mar 2016 16:40:54 +0000
Subject: [PATCH] Set the DbType for XmlDocument / XDocument / XElement

---
 Dapper/XmlHandlers.cs | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/Dapper/XmlHandlers.cs b/Dapper/XmlHandlers.cs
index 7d5af582..d5051f16 100644
--- a/Dapper/XmlHandlers.cs
+++ b/Dapper/XmlHandlers.cs
@@ -1,9 +1,21 @@
-using System.Xml;
+using System.Data;
+using System.Xml;
 using System.Xml.Linq;
+#if COREFX
+using IDbDataParameter = System.Data.Common.DbParameter;
+#endif
 
 namespace Dapper
 {
-    internal sealed class XmlDocumentHandler : SqlMapper.StringTypeHandler<XmlDocument>
+    internal abstract class XmlTypeHandler<T> : SqlMapper.StringTypeHandler<T>
+    {
+        public override void SetValue(IDbDataParameter parameter, T value)
+        {
+            base.SetValue(parameter, value);
+            parameter.DbType = DbType.Xml;
+        }
+    }
+    internal sealed class XmlDocumentHandler : XmlTypeHandler<XmlDocument>
     {
         protected override XmlDocument Parse(string xml)
         {
@@ -13,12 +25,12 @@ namespace Dapper
         }
         protected override string Format(XmlDocument xml) => xml.OuterXml;
     }
-    internal sealed class XDocumentHandler : SqlMapper.StringTypeHandler<XDocument>
+    internal sealed class XDocumentHandler : XmlTypeHandler<XDocument>
     {
         protected override XDocument Parse(string xml) => XDocument.Parse(xml);
         protected override string Format(XDocument xml) => xml.ToString();
     }
-    internal sealed class XElementHandler : SqlMapper.StringTypeHandler<XElement>
+    internal sealed class XElementHandler : XmlTypeHandler<XElement>
     {
         protected override XElement Parse(string xml) => XElement.Parse(xml);
         protected override string Format(XElement xml) => xml.ToString();