/// <summary>初始化</summary>
public override void Init()
{
var fi = Field;
// 自动找时间字段
if (fi == null && FieldName.IsNullOrEmpty())
{
fi = Field = Factory.MasterTime;
}
base.Init();
fi = Field;
if (fi == null)
{
throw new ArgumentNullException(nameof(FieldName), "未指定用于顺序抽取数据的时间字段！");
}
FieldName = fi.Name;
// 先按时间升序，再按主键升序，避免同一秒存在多行数据时，数据顺序不统一
var sort = fi.Asc();
var uq = Factory.Unique;
if (uq != null && uq.Name != fi.Name)
{
sort &= uq.Asc();
}
OrderBy = sort;
}
/// <summary>初始化</summary>
public virtual void Init()
{
// 自动找时间字段
if (FieldName.IsNullOrEmpty())
{
var fi = Factory.Fields.FirstOrDefault(e => e.Type == typeof(DateTime) && e.Name.StartsWithIgnoreCase("UpdateTime", "Modify", "Modified"));
if (fi != null)
{
FieldName = fi.Name;
}
}
}
/// <summary>初始化</summary>
public virtual void Init()
{
var fi = Field;
// 自动找字段
if (fi == null && !FieldName.IsNullOrEmpty())
{
fi = Field = Factory?.Table.FindByName(FieldName);
}
if (fi == null)
{
throw new ArgumentNullException(nameof(FieldName), "未指定用于顺序抽取数据的排序字段！");
}
}
/// <summary>初始化</summary>
public virtual void Init()
{
// 自动找时间字段
if (FieldName.IsNullOrEmpty())
{
var fi = Factory.MasterTime;
if (fi != null)
{
FieldName = fi.Name;
}
}
if (Field == null)
{
throw new ArgumentNullException(nameof(FieldName), "未指定用于顺序抽取数据的时间字段！");
}
}
/// <summary>初始化</summary>
public override void Init()
{
var fi = Field;
// 自动找自增字段
if (fi == null && FieldName.IsNullOrEmpty())
{
fi = Field = Factory.Table.Identity;
}
base.Init();
fi = Field;
if (fi == null)
{
throw new ArgumentNullException(nameof(FieldName), "未指定用于顺序抽取数据的自增字段！");
}
OrderBy = fi.Asc();
}