Business Logic Toolkit for .NET
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ExecuteScalar.cs

using System;

using NUnit.Framework;

using BLToolkit.DataAccess;

namespace HowTo.DataAccess { [TestFixture] public class ExecuteScalar { public abstract class PersonAccessor : DataAccessor<Person> { [SqlQuery("SELECT Count(*) FROM Person")] public abstract int GetCount();

// The Person_Insert sproc returns an id of the created record. // [SprocName("Person_Insert")] public abstract int Insert(Person person); }

[Test] public void Test() { PersonAccessor pa = DataAccessor.CreateInstance<PersonAccessor>();

// ExecuteScalar. // Assert.IsTrue(pa.GetCount() > 0);

// Insert and get id. // Person person = new Person();

person.FirstName = "Crazy"; person.LastName = "Frog"; person.Gender = Gender.Unknown;

int id = pa.Insert(person);

Assert.IsFalse(id == 0);

new SprocQuery<Person>().DeleteByKey(id); } } }

Person.cs

using System;

using BLToolkit.DataAccess; using BLToolkit.Mapping;

namespace HowTo.DataAccess { public class Person { [MapField("PersonID"), PrimaryKey, NonUpdatable] public int ID;

public string LastName; public string FirstName; public string MiddleName; public Gender Gender; } }

Gender.cs

using System;

using BLToolkit.Mapping;

namespace HowTo.DataAccess { public enum Gender { [MapValue("F")] Female, [MapValue("M")] Male, [MapValue("U")] Unknown, [MapValue("O")] Other } }

App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <connectionStrings>
        <add
            name             = "DemoConnection"
            connectionString = "Server=.;Database=BLToolkitData;Integrated Security=SSPI"
            providerName     = "System.Data.SqlClient" />
    </connectionStrings>
</configuration>

CreateSql
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