To set up a simple example of TQ three classes need to be defined. The first is a Database class which contains the connection details of the database being used. This class must inherit from 'Sql.ADatabase', implement the 'GetConnection()' method and 'ConnectionString' property. Also a Table class inheriting from 'Sql.ATable' and a Row class inheriting from 'Sql.ARow' need to be created (This can be done using the UI tool).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | using System;using System.Data.SqlClient;namespace Example { public class CustomDb : Sql.ADatabase { public readonly static Sql.ADatabase INSTANCE = new CustomDb(); private CustomDb() : base(Sql.DatabaseType.Mssql) { } protected override string ConnectionString { get { return "user id=user_name;password=password;server=localhost\\SQLEXPRESS;" + "Trusted_Connection=no;database=Application;connection timeout=30"; } } public override System.Data.Common.DbConnection GetConnection(bool pCanBeReadonly) { SqlConnection connection = new SqlConnection(ConnectionString); connection.Open(); return connection; } }} |
1 2 3 4 5 6 | CREATE TABLE Person ( Id INTEGER IDENTITY NOT NULL PRIMARY KEY, FirstName NVARCHAR(255) NOT NULL, LastName NVARCHAR(255) NOT NULL); |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | using System;using System.Collections.Generic;namespace Example { public sealed class Table : Sql.ATable { public static readonly Table INSTANCE = new Table(); public readonly Sql.Column.IntegerColumn Id; public readonly Sql.Column.StringColumn FirstName; public readonly Sql.Column.StringColumn LastName; public Table() : base(CustomDb.INSTANCE, "Person", typeof(Row)) { Id = new Sql.Column.IntegerColumn(this, "Id", true, true); FirstName = new Sql.Column.StringColumn(this, "FirstName", false); LastName = new Sql.Column.StringColumn(this, "LastName", false); AddColumns(Id,FirstName,LastName); } public Row this[int pIndex, Sql.IResult pQueryResult] { get { return (Row)pQueryResult.GetRow(this, pIndex); } } } public sealed class Row : Sql.ARow { private new Table Tbl { get { return (Table)base.Tbl; } } public Row() : base(Table.INSTANCE) { } public int Id { get { return Tbl.Id.ValueOf(this); } } public string FirstName { get { return Tbl.FirstName.ValueOf(this); } set { Tbl.FirstName.SetValue(this, value); } } public string LastName { get { return Tbl.LastName.ValueOf(this); } set { Tbl.LastName.SetValue(this, value); } } }} |
Full code with query examples
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 | using System;using System.Data.SqlClient;using System.Collections.Generic;namespace Example { public static class RunExample { public static void Main(string[] args) { InsertRowPlainQuery(); InsertQueryUsingRow(); SelectPerson(); ComplexSelectQuery(); SelectSelfJoinQuery(); UpdateRowPlainQuery(); UpdateQueryUsingRow(); DeleteRowPlainQuery(); DeleteQueryUsingRow(); } private static void InsertRowPlainQuery() { Table personTable = Table.INSTANCE; using (Sql.Transaction transaction = new Sql.Transaction(CustomDb.INSTANCE)) { Sql.Query.InsertInto(personTable) .Set(personTable.FirstName, "Jo") .Set(personTable.LastName, "Smith") .Execute(transaction); transaction.Commit(); } } private static void InsertQueryUsingRow() { using (Sql.Transaction transaction = new Sql.Transaction(CustomDb.INSTANCE)) { Row personRow = new Row(); personRow.FirstName = "Jo"; personRow.LastName = "Smith"; personRow.Update(transaction); transaction.Commit(); } } private static void SelectPerson() { Table personTable = Table.INSTANCE; Sql.IResult result = Sql.Query .Select(personTable.Id, personTable.FirstName, personTable.LastName) .From(personTable) .Where(personTable.FirstName == "jo") .Execute(); for (int index = 0; index < result.Count; index++) { Row personRow = personTable[index, result]; int id = personRow.Id; string firstName = personRow.FirstName; string lastName = personRow.LastName; } } private static void ComplexSelectQuery() { Table personTable = Table.INSTANCE; Sql.Function.CountAll count = new Sql.Function.CountAll(); Sql.IResult result = Sql.Query. Select(personTable.LastName, count) .Top(100) .From(personTable) .Where(personTable.LastName.Like("%smith%") & (personTable.LastName != personTable.FirstName | personTable.FirstName == "abc") ) .GroupBy(personTable.LastName) .Having(count > 0) .OrderBy(personTable.LastName) .Execute(); } private static void SelectSelfJoinQuery() { Table personTable = Table.INSTANCE; Table secondPersonTable = new Table(); Sql.IResult result = Sql.Query .Select(personTable.Id, secondPersonTable.Id) .From(personTable) .Join(secondPersonTable, personTable.FirstName == secondPersonTable.FirstName) .Where(personTable.Id != secondPersonTable.Id) .Execute(); for (int index = 0; index < result.Count; index++) { Row personRow = personTable[index, result]; int id = personRow.Id; Row secondRow = secondPersonTable[index, result]; int secId = secondRow.Id; } } private static void UpdateRowPlainQuery() { Table personTable = Table.INSTANCE; using (Sql.Transaction transaction = new Sql.Transaction(CustomDb.INSTANCE)) { Sql.Query.Update(personTable) .Set(personTable.FirstName, "Joe") .Where(personTable.FirstName == "jo") .Execute(transaction); transaction.Commit(); } } private static void UpdateQueryUsingRow() { Table personTable = Table.INSTANCE; Sql.IResult result = Sql.Query.Select(personTable).From(personTable).Execute(); Row personRow = personTable[0, result]; personRow.FirstName = "Joe"; using (Sql.Transaction transaction = new Sql.Transaction(CustomDb.INSTANCE)) { personRow.Update(transaction); transaction.Commit(); } } private static void DeleteRowPlainQuery() { Table personTable = Table.INSTANCE; using (Sql.Transaction transaction = new Sql.Transaction(CustomDb.INSTANCE)) { Sql.Query.DeleteFrom(personTable) .Where(personTable.FirstName == "jo") .Execute(transaction); transaction.Commit(); } } private static void DeleteQueryUsingRow() { Table personTable = Table.INSTANCE; Sql.IResult result = Sql.Query.Select(personTable).From(personTable).Execute(); Row personRow = personTable[0, result]; personRow.Delete(); using (Sql.Transaction transaction = new Sql.Transaction(CustomDb.INSTANCE)) { personRow.Update(transaction); transaction.Commit(); } } } public class CustomDb : Sql.ADatabase { public readonly static Sql.ADatabase INSTANCE = new CustomDb(); private CustomDb() : base(Sql.DatabaseType.Mssql) { } protected override string ConnectionString { get { return "user id=user_name;password=password;server=localhost\\SQLEXPRESS;" + "Trusted_Connection=no;database=Application;connection timeout=30"; } } public override System.Data.Common.DbConnection GetConnection() { SqlConnection connection = new SqlConnection(ConnectionString); connection.Open(); return connection; } } public sealed class Table : Sql.ATable { public static readonly Table INSTANCE = new Table(); public readonly Sql.Column.IntegerColumn Id; public readonly Sql.Column.StringColumn FirstName; public readonly Sql.Column.StringColumn LastName; public Table() : base(CustomDb.INSTANCE, "Person", typeof(Row)) { Id = new Sql.Column.IntegerColumn(this, "Id", true, true); FirstName = new Sql.Column.StringColumn(this, "FirstName", false); LastName = new Sql.Column.StringColumn(this, "LastName", false); AddColumns(Id, FirstName, LastName); } public Row this[int pIndex, Sql.IResult pQueryResult] { get { return (Row)pQueryResult.GetRow(this, pIndex); } } } public sealed class Row : Sql.ARow { private new Table Tbl { get { return (Table)base.Tbl; } } public Row() : base(Table.INSTANCE) { } public int Id { get { return Tbl.Id.ValueOf(this); } } public string FirstName { get { return Tbl.FirstName.ValueOf(this); } set { Tbl.FirstName.SetValue(this, value); } } public string LastName { get { return Tbl.LastName.ValueOf(this); } set { Tbl.LastName.SetValue(this, value); } } }} |
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