Matisse Linq可转换异常Matisse C#

Question

嘿，伙计们在从matisse对象数据库检索记录时遇到了问题，现在我很头疼。。。基本上尝试了所有内容，甚至使用计数消息框显示linq查询正在检索1个对象，但我在它应该工作的时候得到了一个IConvertable错误，基本上我正在尝试编辑现有记录，但它告诉我它需要IConverable，但这在使用SQL时可以工作，它也适用于其他使用Matisse的对象。

db.Open();
        Zoo.Data.Zoo editanimals = new Zoo.Data.Zoo(db);
        var animalidvar = animalid.Text;
        {
          Reptiles_Amphibians f = (from  Reptiles_Amphibians a in editanimals.Reptiles_Amphibianss where a.Animal_ID == animalidvar select a).FirstOrDefault<Reptiles_Amphibians>();

            f.Animal_ID = animalid.Text;
            f.Species = species.Text;
            f.Classification = classif.Text;
            f.Given_Name = givenname.Text;
            f.Photograph = photograph.Text;
            f.Date_Of_Birth = Convert.ToDateTime(dob.Text);
            f.Age = Convert.ToInt32(age.Text);
            f.Location_Code = location.Text;
            f.Born_Captivity_Wild = borncw.Text;
            f.Special_Notes = specnote.Text;
            f.Date_Joined = Convert.ToDateTime(datejoined.Text);
            f.Animal_Dimensions_Upon_Join = duj.Text;
            f.Average_Animal_Dimension = ad.Text;
            f.Average_Life_Span = averagelife.Text;
            f.Dietary_Requirements = diet.Text;
            f.Natural_Habitat_Description = nathab.Text;
            f.Average_Number_Of_Offspring = Convert.ToInt32(averageOffspringTxt.Text);
            f.Reproduction_Type = reproductionTxt.Text;
            f.Average_Clutch_Size = clutchSizeTxt.Text;
            f.Status = statusCombo.Text;
            db.Commit();
        }
        db.Close();
    }

Answer 1

Persisten类（如Reptiles_Amphibians）必须包含在程序集中。

MtDatabase _db = new MtDatabase("localhost", "AnimalDB", new MtPackageObjectFactory("AssemblyName.AnimalsNamespace,AssemblyName", "DataBaseNamespace"));

并且在linq查询之前

_db.SqlCurrentNamespace = "DataBaseNamespace";s