一、使用sql及存储过程
1)使用List<Dictionary<string, MObject>>
1.使用sql ,体验原生态的感觉
- string sql="select * from Class where ClassName = @";
- string sql2="select * from Class where DateTimem = @";
- List<Dictionary<string, MObject>> mylist=db.ExecuteSqlToDictionaryList(sql,"boy'");
- List<Dictionary<string, MObject>> mylist2=db.ExecuteSqlToDictionaryList(sql2,DateTime.Parse("2013-10-10 14:40:08"));
- foreach(var oneClass in mylist){
- string className=oneClass["className"].To<string>();
- long id=oneClass["Classid"].To<long>();
- DateTime datetimem=oneClass["datetimem"].To<DateTime>();//不用区分大小写
- Console.WriteLine(className+" "+id+" "+datetimem);
- }
2.使用mql,智能感知带来的优雅体验
- var list=db.GetDictionaryList(ClassSet.SelectAll().Where(ClassSet.ClassID.BiggerThan(0)))
2)MQL 全面接触
2.1 MQL的标准查询
- var mm=ClassSet.Select(ClassSet.ClassID,ClassSet.ClassName).
- Where(ClassSet.ClassName.Contains("s").And(ClassSet.ClassID.BiggerThan(9)));
- SELECT [Class].[ClassID],[Class].[ClassName] FROM [Class] WHERE [Class].[ClassName] LIKE @p1 AND [Class].[ClassID]>@p2
- @p1=%s%
- @p2=9
2.2 MQL的嵌套查询(含有Top查询:支持mysql、oracle、postgreSQL、sqlserver、sqlite)
- var qiantao=ScoreSet.SelectAll().Where(
- ScoreSet.UserID.In(UserSet.Select(UserSet.UserID).Where(
- UserSet.ClassID.In(
- ClassSet.Select(ClassSet.ClassID).Where(
- ClassSet.ClassName.Equal(c.ClassName).And(ClassSet.ClassID.BiggerThan(0))
- )
- )
- )
- )
- ).Top(1);
- SELECT TOP 1 [Score].* FROM [Score] WHERE [Score].[UserID] IN (SELECT [User].[UserID] FROM [User] WHERE [User].[ClassID] IN (SELECT [Class].[ClassID] FROM [Class] WHERE [Class].[ClassName]=@p1 AND [Class].[ClassID]>@p2 ) )
- @p1=综合测试ClassName2
- @p2=0
2.3 MQL的分组查询
- var mql=ScoreSet.Select(ScoreSet.ScoreM.Sum().AS("sum"),ScoreSet.TypeName).
- Where(ScoreSet.ScoreM.BiggerThanOrEqual(100)).
- GroupBy(ScoreSet.TypeName).
- Having(ScoreSet.ScoreM.Sum().BiggerThan(300));
- SELECT SUM([Score].[ScoreM]) AS 'sum',[Score].[TypeName] FROM [Score] WHERE [Score].[ScoreM]>=@p1 GROUP BY [Score].[TypeName] HAVING SUM([Score].[ScoreM])>@p2
- @p1=100
- @p2=300
2.4 MQL的连接查询
- var m1=ClassSet.Select(ClassSet.ClassID,ClassSet.ClassName)
- .LeftJoin(
- UserSet.Select(UserSet.UserID))
- .ON(ClassSet.ClassID.Equal(UserSet.UserID))
- .Where(UserSet.UserID.BiggerThan(9));
- SELECT [Class].[ClassID],[Class].[ClassName],[User].[UserID] FROM [Class] LEFT JOIN [User] ON [Class].[ClassID]=[User].[UserID] WHERE [User].[UserID]>@p1
- @p1=9
2.5 MQL的Union查询
- var mql=ClassSet.SelectAll().Where(ClassSet.ClassID.BiggerThan(1))
- .Union(ClassSet.SelectAll().Where(ClassSet.ClassID.BiggerThan(2)));
- var mql=ClassSet.SelectAll().Where(ClassSet.ClassID.BiggerThan(1))
- .UnionAll(ClassSet.SelectAll().Where(ClassSet.ClassID.BiggerThan(2)));
- SELECT [Class].* FROM [Class] WHERE [Class].[ClassID]>@p1 UNION SELECT [Class].* FROM [Class] WHERE [Class].[ClassID]>@p2
- @p1=1
- @p2=2
- SELECT [Class].* FROM [Class] WHERE [Class].[ClassID]>@p1 UNION ALL SELECT [Class].* FROM [Class] WHERE [Class].[ClassID]>@p2
- @p1=1
- @p2=2
2.6 MQL的使用预览
- public static void Main(string[] args)
- {
- using (var db=Db.CreateDefaultDb()) {
- db.TransactionEnabled=true;
- db.DebugEnabled=true;
- Console.WriteLine("---------------嵌套查询---------------------");
- var qiantao=ScoreSet.SelectAll().Where(
- ScoreSet.UserID.In(UserSet.Select(UserSet.UserID).Where(
- UserSet.ClassID.In(
- ClassSet.Select(ClassSet.ClassID).Where(
- ClassSet.ClassName.Equal(c.ClassName).And(ClassSet.ClassID.BiggerThan(0))
- )
- )
- )
- )
- ).Top(1);
- Console.WriteLine("---------------分组查询---------------------");
- var mql=ScoreSet.Select(ScoreSet.ScoreM.Sum().AS("sum"),ScoreSet.TypeName).Where(ScoreSet.ScoreM.BiggerThanOrEqual(100)).GroupBy(ScoreSet.TypeName).Having(ScoreSet.ScoreM.Sum().BiggerThan(300));
- Console.WriteLine("---------------连接查询---------------------");
- var m1=ClassSet.Select(ClassSet.ClassID,ClassSet.ClassName)
- .LeftJoin(
- UserSet.Select(UserSet.UserID))
- .ON(ClassSet.ClassID.Equal(UserSet.UserID))
- .Where(UserSet.UserID.BiggerThan(9));
- }
- Console.WriteLine("---------------Union测试---------------------");
- using (var db=Db.CreateDefaultDb()) {
- db.TransactionEnabled=true;
- db.DebugEnabled=true;
- var mql=ClassSet.SelectAll().Where(ClassSet.ClassID.BiggerThan(1))
- .Union(ClassSet.SelectAll().Where(ClassSet.ClassID.BiggerThan(2)));
- }
- }
3)使用DataSet
1.使用存储过程
- DataSet dataset=db.ExecuteProToDataSet("存储过程名",参数一,参数二);
2.使用sql
- DataSet dataset=db.ExecuteSqlToDataSet(sql,"boy");
3.使用mql
- DataSet dataset=db.GetDataSet(ClassSet.SelectAll().Where(ClassSet.ClassID.BiggerThan(0)));
4)使用xml配置sql查询
1.配置config节点
- <appSettings>
- <add key="SQL_XML_FILE_NAME" value="C:\Moon\Moon.Orm\sql.xml"></add>//如果不是全路径,则默认在dll生成目录
- </appSettings>
2.配置xml(sql.xml)
- <?xml version="1.0"?>
- <sqls>
- <sqlxml id="getname">
- <sql>select name from user where id>@</Sql>
- <description>查询用户名(描述信息)</Description>
- </sqlxml>
- </sqls>
3.使用id进行查询
- var list=db.GetDictionaryList(XmlHelper.GetSqlXmlByID("getname"),"boy");
5)sql之王者归来
使用GetDynamicList ,让你体验另一种自由
- object,但在.net 4.0下面,您可以用dynamic直接取值.
- string sql22="select * from Score";
- dynamic list22=db.GetDynamicList(sql22,"Score");
- foreach(var a in list22){
- Console.WriteLine(a.ID+"--"+a.ScoreM+"--"+a.UserID+"--"+a.TypeName);//都是强类型
- }
以下是体验强类型:)