added marr.datamapper source code for easy debugging.

Marr.Data/QGen/UpdateQuery.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Data.Common;
+using Marr.Data.Mapping;
+using Marr.Data.QGen.Dialects;
+
+namespace Marr.Data.QGen
+{
+    public class UpdateQuery : IQuery
+    {
+        protected Dialect Dialect { get; set; }
+        protected string Target { get; set; }
+        protected ColumnMapCollection Columns { get; set; }
+        protected DbCommand Command { get; set; }
+        protected string WhereClause { get; set; }
+
+        public UpdateQuery(Dialect dialect, ColumnMapCollection columns, DbCommand command, string target, string whereClause)
+        {
+            Dialect = dialect;
+            Target = target;
+            Columns = columns;
+            Command = command;
+            WhereClause = whereClause;
+        }
+
+        public string Generate()
+        {
+            StringBuilder sql = new StringBuilder();
+
+            sql.AppendFormat("UPDATE {0} SET ", Dialect.CreateToken(Target));
+
+            int startIndex = sql.Length;
+
+            foreach (DbParameter p in Command.Parameters)
+            {
+                var c = Columns.GetByColumnName(p.ParameterName);
+
+                if (c == null)
+                    break; // All SET columns have been added
+
+                if (sql.Length > startIndex)
+                    sql.Append(",");
+
+                if (!c.ColumnInfo.IsAutoIncrement)
+                {
+                    sql.AppendFormat("{0}={1}{2}", Dialect.CreateToken(c.ColumnInfo.Name), Command.ParameterPrefix(), p.ParameterName);
+                }
+            }
+
+            sql.AppendFormat(" {0}", WhereClause);
+
+            return sql.ToString();
+        }
+
+
+    }
+}