CRM 2011中具有四个实体和多个where子句的左外连接LINQ查询

我在Microsoft Dynamics CRM 2011中遇到了一个问题 这里我有一套账户，其中有许可证，许可证ae与许可证国家有关，许可证国家与县有关

我希望得到这样的查询输出

但这是不恰当的

strSearch="Some text";

var lstItems = (from county in x.De_countySet
                join permitcounty in x.de_permitcountySet on county.De_countyId equals permitcounty.de_CountyId.Id
                join permit in x.de_permitSet on permitcounty.de_PermitId.Id equals permit.de_permitId
                join account in x.AccountSet on permit.de_AccountId.Id equals account.AccountId into outer

                where permit.de_Type.Equals("Type1") && permit.statuscode.Equals("Active")                // Permit Type as Type1 and Status as Active
                where account.De_LegalName.Contains(strSearch) || account.Name.Contains(strSearch)        // Search in Legal Name and Account full name
                where county.de_CountyName.Contains(strSearch)                                            // Search in County Name

                orderby county.de_CountyName
                from account in outer.DefaultIfEmpty()
                select new clsTemp
                {
                    Name = account.Name,
                    De_LegalName = account.De_LegalName,
                    Address1_Line1 = account.Address1_Line1,
                    Address1_City = account.Address1_City,
                    Address1_PostalCode = account.Address1_PostalCode,

                    de_CountyName = county.de_CountyName              
                 }).ToList();

感谢您的帮助

---

Vinu

这里有一种编写组连接的替代方法。请注意，包含

到
的行是唯一被替换的行：

strSearch="Some text";

var lstItems = (from county in x.De_countySet
                join permitcounty in x.de_permitcountySet on county.De_countyId equals permitcounty.de_CountyId.Id
                join permit in x.de_permitSet on permitcounty.de_PermitId.Id equals permit.de_permitId
                let outer = x.AccountSet.Where(account => permit.de_AccountId.Id == account.AccountId)

                where permit.de_Type.Equals("Type1") && permit.statuscode.Equals("Active")                // Permit Type as Type1 and Status as Active
                // "account" is not in scope and should cause a design-time error
                where account.De_LegalName.Contains(strSearch) || account.Name.Contains(strSearch)        // Search in Legal Name and Account full name
                where county.de_CountyName.Contains(strSearch)                                            // Search in County Name

                orderby county.de_CountyName
                from account in outer.DefaultIfEmpty()
                select new clsTemp
                {
                    Name = account.Name,
                    De_LegalName = account.De_LegalName,
                    Address1_Line1 = account.Address1_Line1,
                    Address1_City = account.Address1_City,
                    Address1_PostalCode = account.Address1_PostalCode,

                    de_CountyName = county.de_CountyName              
                 }).ToList();

以这种方式编写时，会发现一个明显的错误（
account
不在范围内）。也许还有其他问题。没有任何许可证的县将不会显示，而有多个许可证但没有任何帐户的县将有多行空白帐户。这是您想要的功能吗

编辑：第二次尝试：

strSearch="Some text";

var lstItems = (from county in x.De_countySet
                join permitcounty in x.de_permitcountySet on county.De_countyId equals permitcounty.de_CountyId.Id
                join permit in x.de_permitSet on permitcounty.de_PermitId.Id equals permit.de_permitId


                where permit.de_Type.Equals("Type1") && permit.statuscode.Equals("Active")                // Permit Type as Type1 and Status as Active

                where county.de_CountyName.Contains(strSearch)                                            // Search in County Name

                orderby county.de_CountyName
                from account in x.AccountSet.Where(account => 
                    permit.de_AccountId.Id == account.AccountId &&
                    (account.De_LegalName.Contains(strSearch) || 
                     account.Name.Contains(strSearch))).DefaultIfEmpty()   // Search in Legal Name and Account full name
                select new clsTemp
                {
                    Name = account.Name,
                    De_LegalName = account.De_LegalName,
                    Address1_Line1 = account.Address1_Line1,
                    Address1_City = account.Address1_City,
                    Address1_PostalCode = account.Address1_PostalCode,

                    de_CountyName = county.de_CountyName              
                 }).ToList();

你能帮我把它弄好吗？什么使它“不合适”？结果集是否不正确？是否存在异常？“GroupJoin”方法无法遵循方法“Join”或不受支持。请尝试使用支持的方法编写查询，或在调用不支持的方法之前调用“ASEUMENUMER”或“ToList”方法，“这是我试图用x.DecountySet等“ToList”更新查询的错误消息，但是没有用，
x.De_countySet
，
x.De_permitcountset
，
x.De_permitSet
，
x.AccountSet
的确切类型是什么？听起来至少有一家不支持LINQ。所有这些都是CRM 2011实体setsHi Risky Martin，非常感谢您的建议。当我尝试实现更改以及尝试访问网页时，我得到了如下错误：“System.NotSupportedException:方法'Where'不能跟随方法'Select'或不受支持。请尝试使用受支持的方法编写查询，或在调用不受支持的方法之前调用'AsEnumerable'或'ToList'方法。”.  我已通过“Name=account[“Name”]==null？null:account[“Name”]。ToString（），”修改了选择以处理空值结果是同样的错误我期望和你一样的结果explained@Vinu看起来我们必须不断尝试不同的方法，直到找到一种它喜欢的方法。@RiskyMartin-你似乎对这方面相当了解。你能看看我的问题，看看你是否能解释一下：