Question

我有一个存储过程，它返回单列数据类型image.stored过程被添加到linq到sql class.how我可以使用linq到sql从存储过程创建字节数组。

存储过程是

create procedure selecttempimage
@user_id bigint
as
begin
select user_image from Temp_Image where users_id=@user_id
end

linq to sql generated method is

[global::System.Data.Linq.Mapping.FunctionAttribute(Name="dbo.selecttempimage")]
    public ISingleResult<selecttempimageResult> selecttempimage([global::System.Data.Linq.Mapping.ParameterAttribute(DbType="BigInt")] System.Nullable<long> user_id)
{
IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())), user_id);
return ((ISingleResult<selecttempimageResult>)(result.ReturnValue));
}

提前感谢。

Answer 1

string givenId = "...";

var images = from Temp_Image in db.Users where users_id == givenId select user_image;

List<byte[]> image_byte_arr = new List<byte[]>();

foreach(image in images)
   image_byte_arr.Add((byte[])image.user_image);

Answer 2

如果您的Linq2Sql上下文被称为MyDbDataContext：

，这应该这样做

using(var context = new MyDbDataContext())
{
    var byte_array = context.selecttempimage(user_id).SingleOrDefault();
    //...do something with byte_array
}

使用linq从存储过程返回字节数组到sql

2 个答案: