diff --git a/README.md b/README.md new file mode 100644 index 000000000..52d420a10 --- /dev/null +++ b/README.md @@ -0,0 +1,205 @@ +# SqlSugar 4.X + + +##Query Demo + +```c + public class Query + { + + public static void Init() + { + Easy(); + Page(); + Where(); + Join(); + Funs(); + Select(); + Ado(); + Group(); + Sqlable(); + } + + private static void Group() + { + var db = GetInstance(); + var list = db.Queryable() + .GroupBy(it => it.Name) + .GroupBy(it => it.Id).Having(it => NBORM.AggregateAvg(it.Id) > 0) + .Select(it => new { idAvg = NBORM.AggregateAvg(it.Id), name = it.Name }).ToList(); + + //SQL: + //SELECT AVG([Id]) AS[idAvg], [Name] AS[name] FROM[Student] GROUP BY[Name],[Id] HAVING(AVG([Id]) > 0 ) + + //NBORM.AggregateSum(object thisValue) + //NBORM.AggregateAvg(TResult thisValue) + //NBORM.AggregateMin(object thisValue) + //NBORM.AggregateMax(object thisValue) + //NBORM.AggregateCount(object thisValue) + } + + private static void Ado() + { + var db = GetInstance(); + var t1= db.Ado.SqlQuery("select 'a'"); + var t2 = db.Ado.GetInt("select 1"); + var t3 = db.Ado.GetDataTable("select 1 as id"); + //more + //db.Ado.GetXXX... + } + + public static void Easy() + { + var db = GetInstance(); + var getAll = db.Queryable().ToList(); + var getAllNoLock = db.Queryable().With(SqlWith.NoLock).ToList(); + var getByPrimaryKey = db.Queryable().InSingle(2); + var getByWhere = db.Queryable().Where(it => it.Id == 1 || it.Name == "a").ToList(); + var getByFuns = db.Queryable().Where(it => NBORM.IsNullOrEmpty(it.Name)).ToList(); + } + + public static void Page() + { + var db = GetInstance(); + var pageIndex = 1; + var pageSize = 2; + var totalCount = 0; + var page = db.Queryable().ToPageList(pageIndex, pageSize, ref totalCount); + + var pageJoin = db.Queryable((st, sc) => new object[] { + JoinType.Left,st.SchoolId==sc.Id + }).ToPageList(pageIndex, pageSize, ref totalCount); + + //top 5 + var top5 = db.Queryable().Take(5).ToList(); + + //skip5 + var skip5 = db.Queryable().Skip(5).ToList(); + } + public static void Where() + { + var db = GetInstance(); + //join + var list = db.Queryable((st, sc) => new object[] { + JoinType.Left,st.SchoolId==sc.Id + }) + .Where(sc => sc.Id == 1) + .Where(st => st.Id == 1) + .Where((st, sc) => st.Id == 1 && sc.Id == 2).ToList(); + + //SELECT [st].[Id],[st].[SchoolId],[st].[Name],[st].[CreateTime] FROM [Student] st + //Left JOIN School sc ON ( [st].[SchoolId] = [sc].[Id] ) + //WHERE ( [sc].[Id] = @Id0 ) AND ( [st].[Id] = @Id1 ) AND (( [st].[Id] = @Id2 ) AND ( [sc].[Id] = @Id3 )) + + + //Where If + string name = null; + string name2 = "sunkaixuan"; + var list2 = db.Queryable() + .WhereIF(!string.IsNullOrEmpty(name), it => it.Name == name) + .WhereIF(!string.IsNullOrEmpty(name2), it => it.Name == name2).ToList(); + } + public static void Join() + { + var db = GetInstance(); + //join 2 + var list = db.Queryable((st, sc) => new object[] { + JoinType.Left,st.SchoolId==sc.Id + }).ToList(); + + //join 3 + var list2 = db.Queryable((st, sc,st2) => new object[] { + JoinType.Left,st.SchoolId==sc.Id, + JoinType.Left,st.SchoolId==st2.Id + }).ToList(); + + //join return List + var list3 = db.Queryable((st, sc) => new object[] { + JoinType.Left,st.SchoolId==sc.Id + }).Select((st,sc)=>new ViewModelStudent { Name= st.Name,SchoolId=sc.Id }).ToList(); + + //join Order By (order by st.id desc,sc.id desc) + var list4 = db.Queryable((st, sc) => new object[] { + JoinType.Left,st.SchoolId==sc.Id + }) + .OrderBy(st=>st.Id,OrderByType.Desc) + .OrderBy(sc=>sc.Id,OrderByType.Desc) + .Select((st, sc) => new ViewModelStudent { Name = st.Name, SchoolId = sc.Id }).ToList(); + } + public static void Funs() + { + var db = GetInstance(); + var t1 = db.Queryable().Where(it => NBORM.ToLower(it.Name) == NBORM.ToLower("JACK")).ToList(); + //SELECT [Id],[SchoolId],[Name],[CreateTime] FROM [Student] WHERE ((LOWER([Name])) = (LOWER(@MethodConst0)) ) + + /***More Functions***/ + //NBORM.IsNullOrEmpty(object thisValue) + //NBORM.ToLower(object thisValue) + //NBORM.string ToUpper(object thisValue) + //NBORM.string Trim(object thisValue) + //NBORM.bool Contains(string thisValue, string parameterValue) + //NBORM.ContainsArray(object[] thisValue, string parameterValue) + //NBORM.StartsWith(object thisValue, string parameterValue) + //NBORM.EndsWith(object thisValue, string parameterValue) + //NBORM.Equals(object thisValue, object parameterValue) + //NBORM.DateIsSame(DateTime date1, DateTime date2) + //NBORM.DateIsSame(DateTime date1, DateTime date2, DateType dataType) + //NBORM.DateAdd(DateTime date, int addValue, DateType millisecond) + //NBORM.DateAdd(DateTime date, int addValue) + //NBORM.DateValue(DateTime date, DateType dataType) + //NBORM.Between(object value, object start, object end) + //NBORM.ToInt32(object value) + //NBORM.ToInt64(object value) + //NBORM.ToDate(object value) + //NBORM.ToString(object value) + //NBORM.ToDecimal(object value) + //NBORM.ToGuid(object value) + //NBORM.ToDouble(object value) + //NBORM.ToBool(object value) + //NBORM.Substring(object value, int index, int length) + //NBORM.Replace(object value, string oldChar, string newChar) + //NBORM.Length(object value) { throw new NotImplementedException(); } + //NBORM.AggregateSum(object thisValue) + //NBORM.AggregateAvg(TResult thisValue) + //NBORM.AggregateMin(object thisValue) + //NBORM.AggregateMax(object thisValue) + //NBORM.AggregateCount(object thisValue) + } + public static void Select() + { + var db = GetInstance(); + db.IgnoreColumns.Add("TestId", "Student"); + var s1 = db.Queryable().Select(it => new ViewModelStudent2 { Name = it.Name, Student = it }).ToList(); + var s2 = db.Queryable().Select(it => new { id = it.Id, w = new { x = it } }).ToList(); + var s3 = db.Queryable().Select(it => new { newid = it.Id }).ToList(); + var s4 = db.Queryable().Select(it => new { newid = it.Id, obj = it }).ToList(); + var s5 = db.Queryable().Select(it => new ViewModelStudent2 { Student = it, Name = it.Name }).ToList(); + } + + private static void Sqlable() + { + var db = GetInstance(); + var join3 = db.Queryable("Student", "st") + .AddJoinInfo("School", "sh", "sh.id=st.schoolid") + .Where("st.id>@id") + .AddParameters(new { id = 1 }) + .Select("st.*").ToList(); + //SELECT st.* FROM [Student] st Left JOIN School sh ON sh.id=st.schoolid WHERE st.id>@id + } + + + public static SqlSugarClient GetInstance() + { + SqlSugarClient db = new SqlSugarClient(new SystemTableConfig() { ConnectionString = Config.ConnectionString, DbType = DbType.SqlServer, IsAutoCloseConnection = true }); + db.Ado.IsEnableLogEvent = true; + db.Ado.LogEventStarting = (sql, pars) => + { + Console.WriteLine(sql + "\r\n" + db.RewritableMethods.SerializeObject(pars)); + Console.WriteLine(); + }; + return db; + } + } +``` + +