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[英]Linq Groupby multiple columns with the same name (An anonymous type cannot have multiple properties with the same name)
[英]Linq: An anonymous type cannot have multiple properties with the same name
我如何在 linq 表達式中使用同名的 GroupBy?,我有以下代碼從多個實體獲取數據。 我有 RP 和 SubParty 表都有一個名稱字段,我想同時顯示這兩個表,但 linq 給我以下錯誤
一個匿名類型不能有多個同名的屬性
var rp = await context.RP.AsNoTracking()
.Include(rp => rp.SubPartyNav)
.Include(rp => rp.partyNav)
.Where(rp => rp.ProductID == request.ID)
.GroupBy(rpSp => new
{
rpSp.partyNav.PartyName,
rpSp.SubPartyNav.PartyNav.PartyName })
.Select(r => new RspDTO
{
PartyName = r.Key.PartyName,
SubPartyName = r.Key.PartyName, })
.ToListAsync();
只需明確給出屬性名稱:
.GroupBy(rpSp => new
{
PartyName = rpSp.partyNav.PartyName,
SubPartyName = rpSp.SubPartyNav.PartyNav.PartyName })
.Select(r => new RspDTO
{
PartyName = r.Key.PartyName,
SubPartyName = r.Key.SubPartyName, })
此外,它看起來更像是你想要.Distinct()
而不是.GroupBy()
,因為你只使用組鍵:
.Select(rpSp => new
{
PartyName = rpSp.partyNav.PartyName,
SubPartyName = rpSp.SubPartyNav.PartyNav.PartyName })
.Distinct()
.Select(r => new RspDTO
{
PartyName = r.PartyName,
SubPartyName = r.SubPartyName, })
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