nhibernate 3在保存字节[]时是否有任何问题 [英] does nhibernate 3 have any problem with saving byte []

问题描述

在我的mvc项目中，我使用nhibernate 3作为orm，但是我在保存和加载类型为字节[]的图像时遇到问题

in my mvc project im using nhibernate 3 as orm, but i have a problem with saving and loading images which their type is byte []

public class PersonImage  : PersistentObject
{
    private string _contentType;
    private byte[] _image;

    private Person _person;


    virtual public string ContentType
    {
        get { return _contentType; }
        set
        {
            if ( value != null && value.Length > 20)
                throw new ArgumentOutOfRangeException("Invalid value for ContentType", value, value.ToString());
            _contentType = value;
        }
    }

    virtual public byte[] Image
    {
        get { return _image; }
        set { _image = value; }
    }

     }



 public class PersonImageMap : ClassMap<PersonImage>
{
    public PersonImageMap()
    {
        Schema("personnel");

        Id(p => p.Id);

        Map(p => p.Image)
            .CustomSqlType("varbinary(MAX)")
            .Not.Nullable();

        Map(p => p.ContentType)
            .Not.Nullable();

        }

}

问题是我认为该图像无法正确保存，因为当我加载它时，我只能看到图像的一部分而不是整个图像！

the problem is that i think this image cant be saved correctly because when i load it i just can see a part of image not the whole image!!

推荐答案

我找到了它 在这种情况下，应该定义length属性

i found it the length attribute should be defined in this case

 Map(p => p.Image)
            .Length(2147483647)
            .CustomSqlType("varbinary(MAX)")
            .Not.Nullable();

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