/// <summary>
/// 创建操作命令集合对象。
/// </summary>
/// <param name="context">操作上下文。</param>
public OperateCommandCollection(DbOperateContext context)
{
_ExecutionMode = context.Context.Database.Provider.ExecutionMode;
operationContext = context;
commands = new List <OperateCommandBase>();
CheckParameterCount();
}
private static DbObjectsOperateBase GetInsertOperate <T>(object item, DbOperateContext executor) where T : class
{
var list = executor.Find(typeof(T));
if (list != null)
{
return(list.Where(a => a.Type == EOperateType.InsertObjects || a.Type == EOperateType.InsertPropertys)
.OfType <DbObjectsOperateBase>().FirstOrDefault(a => a.Contains(item)));
}
return(null);
}
/// <summary>
/// 创建命令对象。
/// </summary>
/// <param name="context">操作执行上下文。</param>
/// <param name="mode">执行模式。</param>
public SingleOperateCommand(DbOperateContext context, EExecutionMode mode)
: base(context)
{
if (mode == EExecutionMode.SingleOperation)
{
ExecuteMode = ECommandExecuteMode.Simple;
}
else
{
ExecuteMode = ECommandExecuteMode.Split;
}
}
/// <summary>
/// 创建数据库操作命令对象。
/// </summary>
/// <param name="context">操作上下文。</param>
public DbOperateCommand(DbOperateContext context)
{
Executor = context;
var database = context.Context.Database;
var provider = database.Provider;
factory = provider.Factory;
var feature = database.Feature;
if (feature.MaxParameterCount.HasValue)
{
maxParameterCount = feature.MaxParameterCount.Value;
}
else
{
maxParameterCount = short.MaxValue;
}
}
/// <summary>
/// 初始化<see cref="DbContext"/>实例对象。
/// </summary>
private DbContext()
{
Executor = new DbOperateContext(this);
Configuration = new DbContextConfiguration(this);
var propertys = _PropertyInfoCache.GetOrAdd(GetType(), type =>
{
return(type.GetProperties()
.Where(a => a.PropertyType.IsGenericType && a.CanWrite &&
a.PropertyType.GetGenericTypeDefinition() == typeof(DbSet <>))
.Select(a => new PropertyConstructor()
{
Property = a,
Constructor = a.PropertyType.GetConstructors().First()
})
.ToArray());
});
var para = new object[] { this, null };
foreach (var pro in propertys)
{
pro.Property.SetValue(this, pro.Constructor.Invoke(para));
}
}
/// <summary>
/// 创建操作命令集合对象。
/// </summary>
/// <param name="context">操作上下文。</param>
public DbOperateCommandCollection(DbOperateContext context)
{
operationContext = context;
commands = new List <DbOperateCommand>();
CheckParameterCount();
}
/// <summary>
/// 创建命令对象。
/// </summary>
/// <param name="context">操作执行上下文</param>
public MultiOperateCommand(DbOperateContext context)
: base(context)
{
}