我正在尝试使用EF 6.0执行全文索引搜索。我正在使用IDbCommandInterceptor（http://www.entityframework.info/Home/FullTextSearch）执行全文搜索，但它给我这个例外：
不能在列＆＃39; FirstName＆＃39;上使用CONTAINS或FREETEXT谓词 因为它不是全文索引。
Linq查询：
ListOfEmployees = _context.EmployeeCvs.Include(x => x.Employee)
.Include(x => x.Tags)
.Include(x => x.ProjectExperiences)
.Where(x => x.Employee.FirstName.Contains(SearchQuery.Keyword) || x.Employee.LastName.Contains(SearchQuery.Keyword) || x.ProjectExperiences.Any(y => y.ProjectTitle.Contains(SearchQuery.Keyword) || y.Description.Contains(SearchQuery.Keyword)) || x.Tags.Any(t => t.Title.Contains(SearchQuery.Keyword)))
.ToList();
以下是EF执行的查询：
exec sp_executesql N'SELECT
[UnionAll1].[Id] AS [C1],
[UnionAll1].[Id1] AS [C2],
[UnionAll1].[Id2] AS [C3],
[UnionAll1].[Id3] AS [C4],
[UnionAll1].[Id4] AS [C5],
[UnionAll1].[Id5] AS [C6],
[UnionAll1].[Id6] AS [C7],
[UnionAll1].[Id7] AS [C8],
[UnionAll1].[Id8] AS [C9],
[UnionAll1].[FirstName] AS [C10],
[UnionAll1].[LastName] AS [C11],
[UnionAll1].[EnterpriseId] AS [C12],
[UnionAll1].[Level] AS [C13],
[UnionAll1].[C1] AS [C14],
[UnionAll1].[Id9] AS [C15],
[UnionAll1].[Id10] AS [C16],
[UnionAll1].[Title] AS [C17],
[UnionAll1].[CreatedDate] AS [C18],
[UnionAll1].[CreatedBy] AS [C19],
[UnionAll1].[UpdatedDate] AS [C20],
[UnionAll1].[UpdatedBy] AS [C21],
[UnionAll1].[IsDeleted] AS [C22],
[UnionAll1].[TagType_Id] AS [C23],
[UnionAll1].[ProjectExperience_Id] AS [C24],
[UnionAll1].[C2] AS [C25],
[UnionAll1].[C3] AS [C26],
[UnionAll1].[C4] AS [C27],
[UnionAll1].[C5] AS [C28],
[UnionAll1].[C6] AS [C29],
[UnionAll1].[C7] AS [C30],
[UnionAll1].[C8] AS [C31],
[UnionAll1].[C9] AS [C32],
[UnionAll1].[C10] AS [C33],
[UnionAll1].[C11] AS [C34],
[UnionAll1].[C12] AS [C35],
[UnionAll1].[C13] AS [C36],
[UnionAll1].[C14] AS [C37],
[UnionAll1].[C15] AS [C38],
[UnionAll1].[C16] AS [C39],
[UnionAll1].[C17] AS [C40]
FROM (SELECT
CASE WHEN ([Join7].[FKEmployeeCvId] IS NULL) THEN CAST(NULL AS int) ELSE 1 END AS [C1],
[Extent1].[Id] AS [Id],
[Extent2].[Id] AS [Id1],
[Extent3].[Id] AS [Id2],
[Extent4].[Id] AS [Id3],
[Extent5].[Id] AS [Id4],
[Extent6].[Id] AS [Id5],
[Extent7].[Id] AS [Id6],
[Extent1].[Id] AS [Id7],
[Extent1].[Id] AS [Id8],
[Extent4].[FirstName] AS [FirstName],
[Extent5].[LastName] AS [LastName],
[Extent6].[EnterpriseId] AS [EnterpriseId],
[Extent7].[Level] AS [Level],
[Join7].[Id] AS [Id9],
[Join7].[Id] AS [Id10],
[Join7].[Title] AS [Title],
[Join7].[CreatedDate] AS [CreatedDate],
[Join7].[CreatedBy] AS [CreatedBy],
[Join7].[UpdatedDate] AS [UpdatedDate],
[Join7].[UpdatedBy] AS [UpdatedBy],
[Join7].[IsDeleted] AS [IsDeleted],
[Join7].[TagType_Id] AS [TagType_Id],
[Join7].[ProjectExperience_Id] AS [ProjectExperience_Id],
CAST(NULL AS int) AS [C2],
CAST(NULL AS varchar(1)) AS [C3],
CAST(NULL AS int) AS [C4],
CAST(NULL AS varchar(1)) AS [C5],
CAST(NULL AS varchar(1)) AS [C6],
CAST(NULL AS datetime2) AS [C7],
CAST(NULL AS varchar(1)) AS [C8],
CAST(NULL AS datetime2) AS [C9],
CAST(NULL AS varchar(1)) AS [C10],
CAST(NULL AS bit) AS [C11],
CAST(NULL AS int) AS [C12],
CAST(NULL AS int) AS [C13],
CAST(NULL AS int) AS [C14],
CAST(NULL AS int) AS [C15],
CAST(NULL AS int) AS [C16],
CAST(NULL AS int) AS [C17]
FROM (SELECT [Var_41].[Id] AS [Id], [Var_41].[Employee_Id] AS [Employee_Id]
FROM [dbo].[EmployeeCv] AS [Var_41]
WHERE ([Var_41].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent1]
LEFT OUTER JOIN (SELECT [Var_42].[Id] AS [Id], [Var_42].[FirstName] AS [FirstName], [Var_42].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_42]
WHERE ([Var_42].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent2] ON ([Extent2].[Discriminator] = N''Employee'') AND ([Extent1].[Employee_Id] = [Extent2].[Id])
LEFT OUTER JOIN (SELECT [Var_43].[Id] AS [Id], [Var_43].[LastName] AS [LastName], [Var_43].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_43]
WHERE ([Var_43].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent3] ON ([Extent3].[Discriminator] = N''Employee'') AND ([Extent1].[Employee_Id] = [Extent3].[Id])
LEFT OUTER JOIN (SELECT [Var_44].[Id] AS [Id], [Var_44].[FirstName] AS [FirstName], [Var_44].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_44]
WHERE ([Var_44].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent4] ON ([Extent4].[Discriminator] = N''Employee'') AND ([Extent1].[Employee_Id] = [Extent4].[Id])
LEFT OUTER JOIN (SELECT [Var_45].[Id] AS [Id], [Var_45].[LastName] AS [LastName], [Var_45].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_45]
WHERE ([Var_45].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent5] ON ([Extent5].[Discriminator] = N''Employee'') AND ([Extent1].[Employee_Id] = [Extent5].[Id])
LEFT OUTER JOIN (SELECT [Var_46].[Id] AS [Id], [Var_46].[EnterpriseId] AS [EnterpriseId], [Var_46].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_46]
WHERE ([Var_46].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent6] ON ([Extent6].[Discriminator] = N''Employee'') AND ([Extent1].[Employee_Id] = [Extent6].[Id])
LEFT OUTER JOIN (SELECT [Var_47].[Id] AS [Id], [Var_47].[Level] AS [Level], [Var_47].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_47]
WHERE ([Var_47].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent7] ON ([Extent7].[Discriminator] = N''Employee'') AND ([Extent1].[Employee_Id] = [Extent7].[Id])
LEFT OUTER JOIN (SELECT [Extent8].[FKEmployeeCvId] AS [FKEmployeeCvId], [Extent9].[Id] AS [Id], [Extent9].[Title] AS [Title], [Extent9].[CreatedDate] AS [CreatedDate], [Extent9].[CreatedBy] AS [CreatedBy], [Extent9].[UpdatedDate] AS [UpdatedDate], [Extent9].[UpdatedBy] AS [UpdatedBy], [Extent9].[IsDeleted] AS [IsDeleted], [Extent9].[TagType_Id] AS [TagType_Id], [Extent9].[ProjectExperience_Id] AS [ProjectExperience_Id]
FROM [dbo].[EmployeeTags] AS [Extent8]
INNER JOIN (SELECT [Var_48].[Id] AS [Id], [Var_48].[Title] AS [Title], [Var_48].[CreatedDate] AS [CreatedDate], [Var_48].[CreatedBy] AS [CreatedBy], [Var_48].[UpdatedDate] AS [UpdatedDate], [Var_48].[UpdatedBy] AS [UpdatedBy], [Var_48].[IsDeleted] AS [IsDeleted], [Var_48].[TagType_Id] AS [TagType_Id], [Var_48].[ProjectExperience_Id] AS [ProjectExperience_Id]
FROM [dbo].[Tag] AS [Var_48]
WHERE ([Var_48].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent9] ON [Extent9].[Id] = [Extent8].[FKTagId] ) AS [Join7] ON [Extent1].[Id] = [Join7].[FKEmployeeCvId]
WHERE (contains([Extent2].[FirstName], @p__linq__0)) OR (contains([Extent3].[LastName], @p__linq__1)) OR ( EXISTS (SELECT
1 AS [C1]
FROM [dbo].[ProjectExperience] AS [Extent10]
WHERE (([Extent10].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL)) AND ([Extent10].[Type] = N''Draft'') AND ([Extent1].[Id] = [Extent10].[EmployeeCv_Id]) AND ((contains([Extent10].[ProjectTitle], @p__linq__2)) OR (contains([Extent10].[Description], @p__linq__3)))
)) OR ( EXISTS (SELECT
1 AS [C1]
FROM [dbo].[EmployeeTags] AS [Extent11]
INNER JOIN (SELECT [Var_49].[Id] AS [Id], [Var_49].[Title] AS [Title]
FROM [dbo].[Tag] AS [Var_49]
WHERE ([Var_49].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent12] ON [Extent12].[Id] = [Extent11].[FKTagId]
WHERE ([Extent1].[Id] = [Extent11].[FKEmployeeCvId]) AND (contains([Extent12].[Title], @p__linq__4))
))
UNION ALL
SELECT
2 AS [C1],
[Extent13].[Id] AS [Id],
[Extent14].[Id] AS [Id1],
[Extent15].[Id] AS [Id2],
[Extent16].[Id] AS [Id3],
[Extent17].[Id] AS [Id4],
[Extent18].[Id] AS [Id5],
[Extent19].[Id] AS [Id6],
[Extent13].[Id] AS [Id7],
[Extent13].[Id] AS [Id8],
[Extent16].[FirstName] AS [FirstName],
[Extent17].[LastName] AS [LastName],
[Extent18].[EnterpriseId] AS [EnterpriseId],
[Extent19].[Level] AS [Level],
CAST(NULL AS int) AS [C2],
CAST(NULL AS int) AS [C3],
CAST(NULL AS varchar(1)) AS [C4],
CAST(NULL AS datetime2) AS [C5],
CAST(NULL AS varchar(1)) AS [C6],
CAST(NULL AS datetime2) AS [C7],
CAST(NULL AS varchar(1)) AS [C8],
CAST(NULL AS bit) AS [C9],
CAST(NULL AS int) AS [C10],
CAST(NULL AS int) AS [C11],
[Extent20].[Id] AS [Id9],
''4X0X'' AS [C12],
[Extent20].[Id] AS [Id10],
[Extent20].[ProjectTitle] AS [ProjectTitle],
[Extent20].[Description] AS [Description],
[Extent20].[CreatedDate] AS [CreatedDate],
[Extent20].[CreatedBy] AS [CreatedBy],
[Extent20].[UpdatedDate] AS [UpdatedDate],
[Extent20].[UpdatedBy] AS [UpdatedBy],
[Extent20].[IsDeleted] AS [IsDeleted],
[Extent20].[SequenceOrder] AS [SequenceOrder],
[Extent20].[EmployeeCv_Id] AS [EmployeeCv_Id],
[Extent20].[CvProfile_Id] AS [CvProfile_Id],
[Extent20].[AssociatedSchedulingProject_Id] AS [AssociatedSchedulingProject_Id],
[Extent20].[Customer_Id] AS [Customer_Id],
[Extent20].[Employee_Id] AS [Employee_Id]
FROM (SELECT [Var_50].[Id] AS [Id], [Var_50].[Employee_Id] AS [Employee_Id]
FROM [dbo].[EmployeeCv] AS [Var_50]
WHERE ([Var_50].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent13]
LEFT OUTER JOIN (SELECT [Var_51].[Id] AS [Id], [Var_51].[FirstName] AS [FirstName], [Var_51].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_51]
WHERE ([Var_51].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent14] ON ([Extent14].[Discriminator] = N''Employee'') AND ([Extent13].[Employee_Id] = [Extent14].[Id])
LEFT OUTER JOIN (SELECT [Var_52].[Id] AS [Id], [Var_52].[LastName] AS [LastName], [Var_52].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_52]
WHERE ([Var_52].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent15] ON ([Extent15].[Discriminator] = N''Employee'') AND ([Extent13].[Employee_Id] = [Extent15].[Id])
LEFT OUTER JOIN (SELECT [Var_53].[Id] AS [Id], [Var_53].[FirstName] AS [FirstName], [Var_53].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_53]
WHERE ([Var_53].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent16] ON ([Extent16].[Discriminator] = N''Employee'') AND ([Extent13].[Employee_Id] = [Extent16].[Id])
LEFT OUTER JOIN (SELECT [Var_54].[Id] AS [Id], [Var_54].[LastName] AS [LastName], [Var_54].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_54]
WHERE ([Var_54].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent17] ON ([Extent17].[Discriminator] = N''Employee'') AND ([Extent13].[Employee_Id] = [Extent17].[Id])
LEFT OUTER JOIN (SELECT [Var_55].[Id] AS [Id], [Var_55].[EnterpriseId] AS [EnterpriseId], [Var_55].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_55]
WHERE ([Var_55].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent18] ON ([Extent18].[Discriminator] = N''Employee'') AND ([Extent13].[Employee_Id] = [Extent18].[Id])
LEFT OUTER JOIN (SELECT [Var_56].[Id] AS [Id], [Var_56].[Level] AS [Level], [Var_56].[Discriminator] AS [Discriminator]
FROM [dbo].[Employee] AS [Var_56]
WHERE ([Var_56].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent19] ON ([Extent19].[Discriminator] = N''Employee'') AND ([Extent13].[Employee_Id] = [Extent19].[Id])
INNER JOIN (SELECT [Var_57].[Id] AS [Id], [Var_57].[ProjectTitle] AS [ProjectTitle], [Var_57].[Description] AS [Description], [Var_57].[CreatedDate] AS [CreatedDate], [Var_57].[CreatedBy] AS [CreatedBy], [Var_57].[UpdatedDate] AS [UpdatedDate], [Var_57].[UpdatedBy] AS [UpdatedBy], [Var_57].[IsDeleted] AS [IsDeleted], [Var_57].[SequenceOrder] AS [SequenceOrder], [Var_57].[EmployeeCv_Id] AS [EmployeeCv_Id], [Var_57].[CvProfile_Id] AS [CvProfile_Id], [Var_57].[AssociatedSchedulingProject_Id] AS [AssociatedSchedulingProject_Id], [Var_57].[Customer_Id] AS [Customer_Id], [Var_57].[Employee_Id] AS [Employee_Id], [Var_57].[Type] AS [Type]
FROM [dbo].[ProjectExperience] AS [Var_57]
WHERE ([Var_57].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent20] ON ([Extent20].[Type] = N''Draft'') AND ([Extent13].[Id] = [Extent20].[EmployeeCv_Id])
WHERE (contains([Extent14].[FirstName], @p__linq__0)) OR (contains([Extent15].[LastName], @p__linq__1)) OR ( EXISTS (SELECT
1 AS [C1]
FROM [dbo].[ProjectExperience] AS [Extent21]
WHERE (([Extent21].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL)) AND ([Extent21].[Type] = N''Draft'') AND ([Extent13].[Id] = [Extent21].[EmployeeCv_Id]) AND ((contains([Extent21].[ProjectTitle], @p__linq__2)) OR (contains([Extent21].[Description], @p__linq__3)))
)) OR ( EXISTS (SELECT
1 AS [C1]
FROM [dbo].[EmployeeTags] AS [Extent22]
INNER JOIN (SELECT [Var_58].[Id] AS [Id], [Var_58].[Title] AS [Title]
FROM [dbo].[Tag] AS [Var_58]
WHERE ([Var_58].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent23] ON [Extent23].[Id] = [Extent22].[FKTagId]
WHERE ([Extent13].[Id] = [Extent22].[FKEmployeeCvId]) AND (contains([Extent23].[Title], @p__linq__4))
))) AS [UnionAll1]
ORDER BY [UnionAll1].[Id] ASC, [UnionAll1].[Id1] ASC, [UnionAll1].[Id2] ASC, [UnionAll1].[Id3] ASC, [UnionAll1].[Id4] ASC, [UnionAll1].[Id5] ASC, [UnionAll1].[Id6] ASC, [UnionAll1].[C1] ASC',N'@DynamicFilterParam_IsDeleted_IsDeleted bit,@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled bit,@p__linq__0 char(4096),@p__linq__1 char(4096),@p__linq__2 char(4096),@p__linq__3 char(4096),@p__linq__4 char(4096)',@DynamicFilterParam_IsDeleted_IsDeleted=0,@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled=NULL,@p__linq__0='(sitecore)',@p__linq__1='(sitecore)',
@p__linq__2='(sitecore)',
@p__linq__3='(sitecore) ',@p__linq__4='(sitecore) '
当我在SQL MS中执行此查询时，它给出了同样的错误。 即使我可以直接在表上成功执行包含查询，如下所示：
select * from Employee where contains(FirstName,'"John*"')
这个Linq的作品：
var employeeCV = _context.Employees.Where(x => x.FirstName.Contains(SearchQuery.Keyword)).ToList();
答案 0 :(得分：1)
Your problem is that you are trying to run fulltext not on from Employees table, but on a Extent2, i.e. SELECT something FROM Employees WHERE ... and it is not full-text indexed. You will have to rewrite your linq query or do it in T-SQL instead of linq.
(SELECT [Var_42].[Id] AS [Id], [Var_42].[FirstName] AS [FirstName], [Var_42].[Discriminator] AS [Discriminator] FROM [dbo].[Employee] AS [Var_42] WHERE ([Var_42].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted) OR (@DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled IS NOT NULL) ) AS [Extent2]
I suggest that you try to rewrite your linq query like this:
ListOfEmployees = from cvs in _context.EmployeeCvs.Include(x => x.Employee)
where _Context.Employees.Any(
e=>e.FirstName.Contains(SearchQuery.Keyword)
&& e.EmployeeID == cvs.EmployeeID
))
... etc
This should generate a simple EXISTS statement which should work OK.
It is better to use query syntax, because you can name your subqueries.
The reason why EF is doing this "mess" for you is because you use Dynamic filters.
[Var_58].[IsDeleted] = @DynamicFilterParam_IsDeleted_IsDeleted
If you try to disable the Dynamic filters:
_context.DisableAllFilters();
it will not help you now, since it just sets the variable @DynamicFilterParam_IsDeleted_DynamicFilterIsDisabled in the generated query, but the query still will contain [Var_xx] subqueries, because EntityFramework.DynamicFilters overrides some methods of Entity Framework. See this link.
Why do dynamic filters cause problems?
The reason is mentioned here:
When I specify additional filters on entity queries (using linq's .Where() clause, for example), those additional filters cause EF to create sub-tables in the query.
So Dynamic filters create subqueries and there you get your exception, it is also well described here. There is a similar workaround recommended:
The workaround I'm currently using (which seems to work) is to always force the Full Text Index predicate into a separate sub query so the predicate is always executed against the base table rather than an intermediate result set.
So you should try to convert all the conditions that are using full-text indexes to separate EXISTS statements.
答案 1 :(得分：0)
如果您要使用MS SQL Server，首先必须在数据库中创建全文索引 - 如果您想通过sql语句执行此操作，请参阅此链接https://msdn.microsoft.com/en-us/library/ms187317.aspx，否则请参阅此link - https://technet.microsoft.com/en-us/library/aa197912(v=sql.80).aspx - 如果您想通过UI
执行此操作您能否确认您为参与包含功能的所有列启用了全文索引
select * from Employee where contains((FirstName,LastName),'"John*"')
select * from Tag where contains(Title,'"John*"')
答案 2 :(得分：0)
我最终重写了这样的LINQ以解决问题：
var listOfEmployeeCV = from cvs in _context.EmployeeCvs.Include(x => x.Employee).Include(x=>x.Tags)
.Include(x=>x.ProjectExperiences)
where _context.Employees.Any(
e => e.FirstName.Contains(SearchQuery.Keyword)
&& e.Id == cvs.Employee.Id
) || (_context.Tags.Any(t=>t.Title.Contains(SearchQuery.Keyword) && cvs.Tags.Contains(t)))
|| (_context.ProjectExperiences.Any(pe=>(pe.ProjectTitle.Contains(SearchQuery.Keyword)
|| pe.Description.Contains(SearchQuery.Keyword)) &&
cvs.ProjectExperiences.Contains(pe)))
select new
EmployeeCvDTO
{
Employee = new EmployeeDTO
{
FirstName = cvs.Employee.FirstName,
LastName = cvs.Employee.LastName,
EnterpriseId = cvs.Employee.EnterpriseId,
Level = cvs.Employee.Level
//ProfileImageData = x.Employee.ProfileImageData
},
Tags = cvs.Tags,
ProjectExperiences = cvs.ProjectExperiences,
};
答案 3 :(得分：-2)
通过Entity Framework使用原始sql即可。
rtEntities rv =新的rtEntities（）;
string query = string.Format("SELECT FT_TBL.ID, FT_TBL.Description, KEY_TBL.RANK FROM tbl_user AS FT_TBL INNER JOIN FREETEXTTABLE(tbl_user, Description, '(free text)', 5 ) AS KEY_TBL ON FT_TBL.ID = KEY_TBL.[KEY]");
var data = rv.Database.SqlQuery<userDetails>(query).ToList();
GridView1.DataSource = data;
GridView1.DataBind();