FluentData微型ORM

奇犽 · 发表于 2018-4-27 11:03:18

1、下载

　　这里需要注意的是，FluentData需要.NET4.0的支持，同时支持dynamic，支持的数据库有：

MS SQL Server
MS SQL Server Compact 4.0
MS SQL Azure
MS Access
Oracle
MySQL
SQLite
PostgreSQL
IBM DB2
Sybase
　2、使用
　　说说简单的增、删、改、查，创建并且初始化一个IDbContext，函数中第一个参数为数据库链接字符串，
第二个参数为数据库类型

public static IDbContext Context()
{
var context = new DbContext().ConnectionString(ConnectionString, new SqlServerProvider());
return context;
}
新增使用：
var MembershipId = FluentDataHelper.Context().Sql("insert into Membership(Name,Address) values(@0,@1)").Parameters("张三", "长沙").ExecuteReturnLastId<int>();
Or
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var Insert = FluentDataHelper.Context().Insert("Membership")
.Column("Name", Name)
.Column("Address", Address);
if (ImageByte != null)
Insert.Column("Image", ImageByte);
int MembershipId = Insert.ExecuteReturnLastId<int>();

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删除使用：

int RowId = FluentDataHelper.Context().Sql("delete Membership where Id = @Id").Parameter("Id", Id).Execute();
Or
int RowId = FluentDataHelper.Context().Delete("Membership").Where("Id", Id).Execute();
修改使用：
int RowId = FluentDataHelper.Context().Sql("update Membership set Name = @Name where Id = @Id").Parameter("Name", Name).Parameter("Id", EditId).Execute();
Or
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var Update = FluentDataHelper.Context().Update("Membership")
.Column("Name", Name)
.Where("Id", EditId);
if (ImageByte != null)
Update.Column("Image", ImageByte);
int RowId = Update.Execute();

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查询使用：

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//返回单个值

int RowId = FluentDataHelper.Context().Select<int>("Count(1)")
.From("Membership")
.Where("Tel = @Tel").Parameter("Tel", Tel)
.AndWhere("Id != @Id").Parameter("Id", EditId)
.QuerySingle();
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//返回实体
MembershipEntity Entity = FluentDataHelper.Context().Select<MembershipEntity>("*")
.From("Membership")
.Where("Id = @Id").Parameter("Id", EditId)
.QuerySingle();
//返回多个对象
List<MembershipGroupEntity> ListGroup = FluentDataHelper.Context().Select<MembershipGroupEntity>("*")
.From("MembershipGroup")
.QueryMany();
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//多表关联及分页
var select = FluentDataHelper.Context()
.Select<VehicleEntity>("Vehicle.*,AdminUser.Name as AdminName,Membership.Name as MembershipName,Membership.Tel,Membership.CardId,Membership.Address,Membership.Source")
.From("Vehicle left join AdminUser on Vehicle.AdminId = AdminUser.Id left join Membership on Vehicle.MembershipId = Membership.Id")
.OrderBy("Vehicle.Time desc")
.Paging(pageInfo.PageIndex, pageInfo.PageSize);
if (!string.IsNullOrEmpty(Name))
{
select.AndWhere("Membership.Name like @Name").Parameter("Name", string.Format("%{0}%", Name));
}
if (!string.IsNullOrEmpty(Code))
{
select.AndWhere("Code = @Code").Parameter("Code", Code);
}
this.GridViewVehicle.DataSource = select.QueryMany();