ADO.NET :: Use Of PATINDEX Function In Select Clause With Linq?

Sep 6, 2010

i have an problem to use of PATINDEX function in select clause with Linq.

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Similar Messages:

ADO.NET :: Using Where Clause Before Select In LINQ?

Aug 26, 2010

why use where condition before select statement in LINQ

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ADO.NET :: Convert The Where Clause To Linq?

Oct 22, 2010

how do you convert the WHERE clause of this statement to Linq ?

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Function And Variable Declaration Without An 'As' Clause?

Aug 25, 2010

I get a message - "Function without an 'As' clause" for HMAC_MD5 and "Variable declaration without an 'As' clause" for Key and Value. But the code works. But the messages still exists. Is there a way to fix this to avoid the messages?

[Code]....

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ADO.NET :: Linq And Dynamic Where Clause With Wildcard?

Mar 25, 2011

Linq add wildcard in the where clause dynamically I have a query, i.e.

var query = from r in context.company .....

then have some business logic and based on the validation I want to add dynamically a where clause

if(a == "1")

query = query.Where(r=> r.Name = Fullname); //works!!

else if(a == "2)

query = query.Where SqlMethods.Like(r=> r.Name,"%"+Fullname+"%"); //fails to compile , the r.Name is not found..

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Linq To Entities Multiple - Clause &&

Feb 22, 2010

In the code bdehind && syntax does not work, any ideas?

Entities ctx3 = new Entities();
var uniqueQuote = from quot in ctx3.Quotes.Include("aspnet_Users").Include("Enquiries")
where quot.Enquiries.EnquiryId == selectedEnquiryId && [code]...

Error 2 Delegate 'System.Func' does not take '1' arguments C:LocalGarageFinderLocalGarageFinderEnquiryDetail.aspx.cs 56 33 LocalGarageFinder

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SQL Server :: Select Statement With Where Clause?

Feb 14, 2011

I have a select statement:

cmd = new SqlCommand("select lab_key from tblorderwhere", connection);

I would like to add a where statement that pass variable to the select statement. How I can do this?

Where lab_key =ChargeFine( that is my variable)

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SQL Server :: Aggregate Function In Group By Clause?

Apr 1, 2011

can i use aggregate function in group by clause like below mentioned query (which marked in red color)

[code]....

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SQL Server :: Can Use Aggregate Function In Group By Clause

Feb 9, 2011

can i use aggregate function in group by clause like below mentioned query (which marked in red color)

[code]....

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DataSource Controls :: Linq - Update Statement Where Clause?

May 25, 2010

I am using Linq to SQL. Tables have timestamp columns and I am using regular Linq methodology in ASP.NET MVC.I do use detached entities and always try to do updates without first querying the database for the original entity. To update an entity I use context.Attach(entity, true) followed by context.SubmitChanges() and all is fine. The sql statement that gets executed looks like:

[Code]...

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DataSource Controls :: Use Stored Procedures From LINQ With A Using Clause ?

May 25, 2010

Ive created a new LINQ To SQL class and dragged several tables across from my server, in my code I access them like this

[Code]....this is all ok, however, I have several stored procedures that I want to use as well, but when I drag the stored procedures across I get a compilatiopn error

Error 60 'DB_BL.DB_BLDataContext': type used in a using statement must be implicitly convertible to 'System.IDisposable'

how do I use stored procedures from LINQ with a using clause ?

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C# - Clause Is Used Inside Linq Statement Produces Different Results Than When Used Outside?

Aug 8, 2010

I have the following statement:

List<string> tracks = new List<string> { "ABC", "DEF" };
var items = (from i in Agenda.AgendaSessions
select i).Where(p => p.Tracks.Any(s => tracks.Contains(s.Code)));

this returns all sessions which track contains either ABC or DEF, now when I rewrite the statement like the following, it returns All sessions regardless, as if the clause always yeilds into true,

var items = from i in Agenda.AgendaSessions
where i.Tracks.Any(s=> tracks.Contains(s.Code))
select i;

Update

if there are other clauses within the where, does that affect the results?

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DataSource Controls :: Select Distinct With Where Clause Don't Work?

May 2, 2010

I'm using asp.net login on a SQL Database.

I have 12 users in my User tabel - one of the user I don't want to have in my select (the user is an admin).

I tried this:

[Code]....

I also tried:

WHERE (dbo.aspnet_Roles.RoleName <> 'Administrators')

Both time it took the user into the table....

If I instead try this

WHERE (dbo.aspnet_Roles.RoleName = 'Administrators')

I get only one row (as expected).

What is wrong with the above sql statement - why can't I get 11 users and not them all (12 users)?

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DataSource Controls :: LINQ To Entities Sub - Query - Doesn't Support The "IN" Clause

Apr 7, 2010

I'm having trouble writing what should be a simple sub-query using LINQ to Entities. I have two tables: Customers and Orders that have a relation on the CustID field. Not all Customers have a record in the Orders table, while some have mutiple records. In traditional SQL, you could write the query like this: SELECT * FROM Orders where CustID IN (SELECT CustID FROM Customers) I know this could be done as a JOIN in both SQL and L2E, but my actual query is more complex (about 8-9 joins), so I am hoping to find a L2E sub-query equivalent. Something like this:

[Code]....

I know LINQ to Entities does not support the " IN " clause, so I am looking for something that will work in its place.

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Databases :: Run Query In SQL Error / Error In SELECT Clause: Expression Near ')'?

Dec 7, 2010

I am not able to understand what is the problem with My sql ..as same query is run sucessfully while i use SQL Server 2005 whit out any Exception or error.........

Select Count( Date ) From Attendancemaster
Error in SELECT clause: expression near ')'.
Unable to parse query text.

this is very simple query run sucessfully in SQL Server 2005 but not in

MY SQL and giving Error..and the query on which any datetime avar comes in WHERE clause allso generate error always....?

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ADO.NET :: Difference Between Select And Select New In Linq Query

Aug 17, 2010

What is difference between select { } and select new {} In Linq Query

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C# - Linq To SQL Where In Clause Causes Object Not Set To Instance Of Object

Jul 1, 2010

I have two tables, subscriptions and topics. Each subscription is related to a specific TopicID (PK for topics table). The first query works fine and retrieves the topicID's of all videos that were uploaded today. The problem occurs when I try and then use the results of query1 as a where-in clause for query 2. I keep receiving object reference not set to instance of an object.

Query 1 IQueryable<int> topics = (from t in dataLayer.Videos
where SqlMethods.DateDiffDay(t.DateCreated, DateTime.Today) == 0
select t.TopicID).Distinct(); [code]....

I have looked at some samples around the net and they all seem to be identical to mine.

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C# - Use Linq To Sql To Select One Column From Row?

Dec 18, 2010

I am using this C# with linq to sql:

string currentLabel = from s2f in stream2FieldTypesTable
where s2f.s2fID == item.s2fID
&& (s2f.s2fLabel != item.s2fLabel || s2f.s2fIsRequired != item.s2fIsRequired)
select s2f.s2fLabel;

I am getting a compiler error saying i can't assign type System.Linq.IQueryable<string> to string.

I tried this code:

string currentLabel = from s2f in stream2FieldTypesTable
where s2f.s2fID == item.s2fID
&& (s2f.s2fLabel != item.s2fLabel || s2f.s2fIsRequired != item.s2fIsRequired)
select s2f.s2fLabel.ToString();

And that returns the same error. I'm sure this is a simple thing. what am I missing? I just want the first s2fLabel that matches the where clause.

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C# - LINQ To SQL Dynamic Select?

Jun 7, 2010

how to indicate which columns I would like returned at run-time from a LINQ To SQL statement?I am allowing the user to select items in a checkboxlist representing the columns they would like displayed in a gridview that is bound to the results of a L2S query.I am able to dynamically generate the WHERE clause but am unable to do the same with the SELECT piece. Here is a sample:

var query = from log in context.Logs select log;
query = query.Where(Log => Log.Timestamp > CustomReport.ReportDateStart);
query = query.Where(Log => Log.Timestamp < CustomReport.ReportDateEnd);

[code]...

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ADO.NET :: Linq Select Null Value?

Oct 7, 2010

[Code]....

[Code]....

I have to get the maximum of these two select values. The select values are nullable. How do I go about checking if the value is null before calling the Max() method on it? I tried the ?? coalesing operator (example: e.HomeSales.Max() ?? 0M,) but I get the following error:"Operator '??' cannot be applied to operands of type 'decimal' and 'decimal'"

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ADO.NET :: Using LINQ, How To Execute The TSQL LOG() Function

Mar 25, 2011

I have a SQL view that uses the LOG() function. How can I do the same in a LINQ query?

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ADO.NET :: Apply Add Hour Function In Linq?

Jan 22, 2011

var LateChangesTodate = (from lt in entities.Histories
where lt.RequestDate < dt && (lt.EmailDateA != null ? lt.CompleteDate.Value.AddHours(-48) > lt.EmailDateA : lt.CompleteDate.Value.AddHours(-48) > lt.RequestDate)

[code]...

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Is There A Way To Select Certain Rows And For Each Row, Perform A Function

Nov 26, 2010

Is there a way to select certain rows and for each row, perform a function? Specifically, I want to select specific rows and then send them an email.

Here's a breakdown:

1. Select * from STUDENTS where status = active
2. For each row that is returned, take the $email column and email the student message
3. Repeat until all qualifying rows have been completed.

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ADO.NET :: Set Entitydatasource Select Method To A Function?

Oct 3, 2010

how to set entitydatasource select method to a function?

could i use objectdatasource with entity model?

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SQL Server :: Use Function In Select Statement?

Sep 4, 2010

I used an function in select statement. the select return 3 rows but the function return same value in this 3 rows.

[Code]....

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