no commit message

Utilities/SqlServerDao.cs

@@ -16,6 +16,7 @@ using System.Data;
 using System.Data.Common;
 using System.Data.SqlClient;
 using System.Linq;
+using System.Reflection;
 
 namespace Infrastructure.Utilities
 {
@@ -110,8 +111,23 @@ namespace Infrastructure.Utilities
 				where = "and " + where;
 			}
 
-			string tableName = DbUtil.GetTableName<T>();
-			string sql = "select {2}* from {0} where 1=1 {1}".Fmt(tableName, where, top);
+			string sql = "";
+
+			FieldInfo sqlFieldInfo = ReflectHelper.GetField(typeof(T), "SQL");
+			if (sqlFieldInfo != null) //如果有手工定义SQL，那么优先采用；
+			{
+				sql = sqlFieldInfo.GetValue(null).ToString();
+				if (!top.IsNullOrEmpty())
+				{
+					sql = sql.Insert(6, top);
+				}
+			}
+			else //否则自动生成select。
+			{
+				string tableName = DbUtil.GetTableName<T>();
+				sql = "select {2}* from {0} where 1=1 {1}".Fmt(tableName, where, top);
+			}
+
 			DbUtil.Log(sql);
 
 			List<T> list = null;
@@ -129,29 +145,12 @@ namespace Infrastructure.Utilities
 
 		public T FirstOrDefault<T>(string where) where T : new()
 		{
-			Type type = typeof(T);
-
-			string tableName = DbUtil.GetTableName(type);
-			string sql = "select top 1 * from {0} where 1=1 {1}".Fmt(tableName, where);
-			DbUtil.Log(sql);
-
-			SqlConnection conn = GetConnection(true);
-			using (SqlDataAdapter da = new SqlDataAdapter(sql, conn))
+			List<T> list = SelectTop<T>(1, where);
+			if (list.Any())
 			{
-				using (DataTable table = new DataTable())
-				{
-					da.Fill(table);
-					if (table.Rows.Count == 0)
-					{
-						return default(T);
-					}
-					else
-					{
-						T obj = table.Rows[0].To<T>();
-						return obj;
-					}
-				}
+				return list[0];
 			}
+			return default(T);
 		}
 
 		public int Insert<T>(T entity)