My problem is coming from the fact that I can have multiple fields within my criteria, and for each of these fields, there could be 1 or more values, with different potential operators. For example, from t in Contacts where t.Email == "email@domain.com" || t.Email.Contains ("mydom...
1 LINQ to SQL - Left Outer Join with multiple INNER JOINS 0 How to do multiple left outer joins in a Linq Query? 1 LINQ: Left Outer Join with multiple conditions 0 Inner join with multiple left outer joins 3 LINQ; How to perform left outer join with multiple conditions? 2 LINQ r...
将查询合并为一个。而不是分别查询地区和研究年份，他们必须在同一时间为每个条目检查。
http://www.thereforesystems.com/linq-to-sql-join-on-multiple-conditions/Friday, May 20, 2011 9:45 AMI don't think you understand what I'm trying to do. I only need to join if a condition is met,复制 if (userInterestId > 0) { query = query.Join(objectContext.UserHealthInterest...
http://stackoverflow.com/questions/3020442/linq-joining-in-c-sharp-with-multiple-conditions 如果要达到这个sql的效果: SELECT*FROMtable1 aLEFTJOINtable2 bONa.col1=b.key1ANDa.col2=b.key2ANDb.from_date<=now()ANDb.deleted=0; 可以这样: ...
(file).LengthwherefileLen >0selectfileLen;// Cache the results to avoid multiple trips to the file system.long[] fileLengths = fileQuery.ToArray();// Return the size of the largest filelonglargestFile = fileLengths.Max();// Return the total number of bytes in all the files under the ...
A query is stored in a query variable and initialized with a query expression. You use C# query syntax to write queries. The query in the previous example returns all the even numbers from the integer array. The query expression contains three clauses: from, where, and select. (If you'...
I am trying to split a string to come up with multiple where statements that are OR’d together. [...] I get results with the where clauses and'd not or'd (sp?)I found this…https://social.msdn.microsoft.com/forums/en-US/linqprojectgeneral/thread/925b245d-5529...
Each where clause can only contain conditions against a single entity type. A composite condition involving multiple entities is not valid. Instead, each entity should be filtered in separate where clauses. C# Copy from a in context.AccountSet where (a.Name.StartsWith("Contoso") && a....
说明:在翻译成SQL 语句时,在最外层嵌套了Where条件。 10.多列(Multiple Columns) var categories = from p in group p by new { , } into g select new { , g }; 语句描述:使用Group By按CategoryID和 SupplierID将产品分组。 说明:既按产品的分类,又按供应商分类。在 by后面,new出来一个匿名类。这...