Nhibernate 将两个Int映射到DateTime
你好 我试图创建一个用户类型,将存储在数据库中的两个“int”映射到Datetime。 我的“int”在数据库中调用了time和date,这样我就想得到想要的效果。但我收到了错误:指定的强制转换无效 我的代码:Nhibernate 将两个Int映射到DateTime,nhibernate,fluent-nhibernate,mapping,fluent-nhibernate-mapping,Nhibernate,Fluent Nhibernate,Mapping,Fluent Nhibernate Mapping,你好 我试图创建一个用户类型,将存储在数据库中的两个“int”映射到Datetime。 我的“int”在数据库中调用了time和date,这样我就想得到想要的效果。但我收到了错误:指定的强制转换无效 我的代码: public class DateTimeUserType : ImmutableUserType { public override object NullSafeGet(IDataReader rs, string[] names, object owner)
public class DateTimeUserType : ImmutableUserType
{
public override object NullSafeGet(IDataReader rs, string[] names, object owner)
{
var date = (int)NHibernateUtil.Int32.NullSafeGet(rs, names[0]);
var time = (int)NHibernateUtil.Int32.NullSafeGet(rs, names[1]);
return Converts.ConvertDateTimeFromInt(date, time);
}
public override void NullSafeSet(IDbCommand cmd, object value, int index)
{
var res = Converts.ConvertDateTimeToInt((DateTime)value);
NHibernateUtil.Int32.NullSafeSet(cmd, res.Date.GetValueOrDefault(), index);
NHibernateUtil.Int32.NullSafeSet(cmd, res.Time.GetValueOrDefault(), index + 1);
}
public override Type ReturnedType
{
get { return typeof(DateTime); }
}
public override SqlType[] SqlTypes
{
get { return new[] { SqlTypeFactory.Int32, SqlTypeFactory.Int32 }; }
}
}
public abstract class ImmutableUserType : IUserType
{
public new virtual bool Equals(object x, object y)
{
return object.Equals(x, y);
}
public virtual int GetHashCode(object x)
{
return (x == null) ? 0 : x.GetHashCode();
}
public bool IsMutable
{
get { return false; }
}
public object DeepCopy(object value)
{
return value;
}
public object Replace(object original, object target, object owner)
{
return original;
}
public object Assemble(object cached, object owner)
{
return cached;
}
public object Disassemble(object value)
{
return value;
}
public abstract object NullSafeGet(System.Data.IDataReader rs, string[] names, object owner);
public abstract void NullSafeSet(System.Data.IDbCommand cmd, object value, int index);
public abstract Type ReturnedType { get; }
public abstract SqlType[] SqlTypes { get; }
}
问题似乎已解决,例如重新调试后工作正常。问题可能已解决。方法“NullSafeGet”必须将名称[1]更改为名称[0],并且已解析探测。