联接返回意外的值

我有这个疑问联接返回意外的值

var q = from internalMaterialIssueVocherDetail in _ctx.InternalMaterialIssueVoucherDetails 
     where internalMaterialIssueVocherDetail.InternalMaterialIssueVoucherId == Id 
     join line in _ctx.Lines on internalMaterialIssueVocherDetail.LineId equals line.Id 
     join material in _ctx.Materials on line.Id equals material.LineId

我在InternalMaterialIssueVoucherDetails 1个纪录，这个表有使用Linesmaterial的关系。在我的material表中，我有20条记录，并且输出重复20次，具有相同的值。

为什么？我该如何解决这个问题？

这里是主查询

var q = from internalMaterialIssueVocherDetail in _ctx.InternalMaterialIssueVoucherDetails 
     where internalMaterialIssueVocherDetail.InternalMaterialIssueVoucherId == Id 
     join line in _ctx.Lines on internalMaterialIssueVocherDetail.LineId equals line.Id 
     join joint in _ctx.Joints on internalMaterialIssueVocherDetail.JointId equals joint.Id 
     join sheet in _ctx.Sheets on joint.SheetId equals sheet.Id 
     join material in _ctx.Materials on line.Id equals material.LineId 
     //join materialDescription in _ctx.MaterialDescriptions on material.MaterialDescriptionId equals materialDescription.Id 
     join testPackageJoint in _ctx.TestPackageJoints on joint.Id equals testPackageJoint.JointId 
     join testPackage in _ctx.TestPackages on testPackageJoint.TestPackageId equals testPackage.Id 
     select new ViewIMIV() 
        { 
         // ItemCode = materialDescription.ItemCode, 
         // MaterialDescription = materialDescription.Description, 
         SheetNumber = sheet.SheetNumber, 
         LineNumber = line.LineNumber, 
         TestPackageNumber = testPackage.PackageNumber, 
         QuantityDeliverToMember = internalMaterialIssueVocherDetail.QuantityDeliverToMember.ToString(), 
         //Size = materialDescription.Size1 
        };

来源

2016-08-14 Mehrdad Ghaffari

哪里是你的选择条款？请发布完整的查询。 – user3185569

@ user3185569它嘈杂，你需要吗？ –

@ user3185569我更新了文章 –

您可以使用Distinct删除重复：

(from ........ 
select new 
{ 
    ItemCode = materialDescription.ItemCode, 
    MaterialDescription = materialDescription.Description, 
    SheetNumber = sheet.SheetNumber, 
    LineNumber = line.LineNumber, 
    TestPackageNumber = testPackage.PackageNumber, 
    QuantityDeliverToMember = internalMaterialIssueVocherDetail.QuantityDeliverToMember.ToString(), 
    Size = materialDescription.Size1 
}).Distinct().Select(x => new ViewIMIV() 
{ 
    ItemCode = x.ItemCode, 
    MaterialDescription = x.MaterialDescription, 
    SheetNumber = x.SheetNumber, 
    LineNumber = x.LineNumber, 
    TestPackageNumber = x.TestPackageNumber, 
    QuantityDeliverToMember = x.QuantityDeliverToMember, 
    Size = x.Size 
}).ToList();

来源

2016-08-14 11:40:25 user3185569

我的功能的结果是iqueryable –

@MehrdadGhaffari为什么IQueryable？任何特定的有效原因？ – user3185569

没有具体的理由让我改变它列表 –

联接返回意外的值

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