[英]Converting DateTime to String Entity Framework
我有以下代码,尝试将d.dateofbirth和d.dateofdeath作为字符串返回,但运气不佳。
我尝试使用tostring()或convert,但是在运行时都将它们都转换为sql,因此无法正常工作,
我需要能够在同一gridview单元中的两行上显示DOB和DOD,如下所示:
DOB DOD
到目前为止,这是我的代码:
fmsEntities context = new fmsEntities();
var query = from f in context.funerals
where f.IsPencil == 0
join d in context.deceaseddetails on f.DeceasedID equals d.ID
join i in context.funeralservices on f.ID equals i.FuneralID
where i.IsAlternative == 0
join h in context.htvalues on f.HtValuesID equals h.ID
join p in context.placeofdeaths on f.PlaceOfDeathID equals p.ID
join c in context.coroners on f.CoronerID equals c.ID
select new DataBindingProjection { DeceasedName = (d.LastName + Environment.NewLine + d.FirstName),
DOBDOD = Convert.ToString(d.DateOfBirth)};
var dataobjects = query.ToList();
dataGridView1.DataSource = dataobjects;
private class DataBindingProjection
{
public string DeceasedName {get; set;}
public string DOBDOD {get; set;}
}
更新,按照注释中的建议在构建dataProjection之前移至ToList,
fmsEntities context = new fmsEntities();
var query = (from f in context.funerals
where f.IsPencil == 0
join d in context.deceaseddetails on f.DeceasedID equals d.ID
join i in context.funeralservices on f.ID equals i.FuneralID
where i.IsAlternative == 0
join h in context.htvalues on f.HtValuesID equals h.ID
join p in context.placeofdeaths on f.PlaceOfDeathID equals p.ID
join c in context.coroners on f.CoronerID equals c.ID
select new { f , d , i , h , p , c }).ToList();
var dataobjects = query.Select(d => new DataBindingProjection {DeceasedName = (d.LastName + Environment.NewLine + d.FirstName),
DOBDOD = (d.DateOfBirth.ToString() + Environment.NewLine + d.DateOfDeath.ToString())});
dataGridView1.DataSource = dataobjects;
}
private class DataBindingProjection
{
public string DeceasedName {get; set;}
public string DOBDOD {get; set;}
}
James,请考虑在首次调用“ ToList()”之后进行投影,如下所示:
var dataobjects = query
.ToList()
.Select(d => new DataBindingProjection { DeceasedName = (d.LastName + Environment.NewLine + d.FirstName),
DOBDOD = Convert.ToString(d.DateOfBirth)})
.ToList();
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