DataSource Controls :: Cannot Get The Linq To SQl Query Return Type Working(C#)?

Apr 14, 2010

I am trying to fill a gridview with the data from Product table selecting few columns . I am using 3 - tier architecture and in DAL getproduct(userid) I am writing the query but cannot figure out exactly how to get that working .. here is piece of method I wrote

public List<Project> GetProjectList(int ownerId)

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DataSource Controls :: How To Cast Concrete Type Created In LINQ Query To The Corresponding Interface Type

May 3, 2010

I have an Interface that has its concrete class defined via a factory. Because of this I found no way to use the Interface tpye directly in my LINQ quesry so I had to use the concrete class types to creat a generic list. The LINQ query works but after calling.ToList() on the LINQ query result I get a List(of MyConcreteClass), but I need a List(of IMyConcreteClass). I have tried everything I can find: .Cast, Ctype, implicit casting, etc. but I always get back one of the (2) messages (depending on if I attempt to cast)message:

"Unable to cast object of type 'System.Collections.Generic.List`1[MyConcreteClass]' to type 'System.Collections.Generic.IEnumerable`1[IMyConcreteClass]'."
...or
"Unable to cast object of type '<CastIterator>d__aa`1[IMyConcreteClass]' to type 'System.Collections.Generic.List`1[MyConcreteClass]'."

Here is the sample code:

[Code]....

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DataSource Controls :: Return First Value From A Linq Query?

Mar 12, 2010

Is there a way opf getting the first value from a linq query so for example

[Code]....

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Return Anonymous Type From LINQ Query In VB.NET

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I am consuming an RSS feed to display on my website using a repeater control. I was wondering if it's possible in VB to return an anonymous type from my linq query rather than a collection of strongly typed RSSItems. I know this is possible in C#, however haven't been able to work out a VB equivalent.

[Code]....

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DataSource Controls :: Check Query Return Value Or Not In LINQ

Jun 2, 2010

i have a Linq query that check something in database

after that i want to check if record find in database or not

dim re = From r in db.mytable _
where r.ID = _ID
Select r

how can i check the re return somthing or empty

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DataSource Controls :: Update Query Via LINQ Not Working As Expected?

Jan 6, 2010

I have a form that gets populated by LINQ and I want to be able to update the database using that same form. The form is populated by grabbing a querystring (for example, "edit=10") and searching the primary key for that record. So far so good. I have a button attached to the function below which is supposed to use LINQ to update the database with data from the form. I get no errors, but for some reason, it is only updating one field (Last_Updated) instead of all of them.

[Code]....

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Possible To Assign A Data Type To An Anonymous Type's Members In A Linq Query?

May 5, 2010

If I have a linq query that creates the anonymous type below:

select new
{
lf.id,
lf.name
lf.desc,
plf.childId
};

Is it possible to assign a specific type to one of the members? Specifically I would like to make lf.id a null-able int rather than an int...

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DataSource Controls :: How To Convert Sql Query Into Linq Query

Mar 10, 2010

select Groupid,GroupName,onorusername from palgroup where groupid in (select distinct Groupid

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How To Return Anonymous Type While Using Linq

Jun 30, 2010

Do any one know how to return an anonymous type. I am using Linq where i need to return the following code

private <What's the return type to be provided here> SampleLinq(Int32 Num)
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return (query)
}

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DataSource Controls :: Return New ID From LINQ InsertOnSubmit?

Jan 21, 2010

I have an autoincrement ID on some table.I need to know what is the ID of the new row when I add the object using InsertOnSubmit, but this method returns void.What is the common way of doing this.

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ADO.NET :: Return Type Of Linq To SQL Stored Procedures?

Sep 20, 2010

I am using .net framework 3.5 and sql server 2008.

In my project coding, I want to call stored procedures in sql server 2008.

return value is the object list which references the entity.

But I have the questions.

If in the entity named as "order", is it matching the properties or created through entity constructor??

In my case, I have two properties and one constructor which match one property.

public class orders

{
orders ( string orderid)
{
this.orderid=orderid;
}
public string orderid {get;set;}
public string orderno{get;set;}
}

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DataSource Controls :: Update Query Not Working When Using Query Builder To Configure Table Adapter

Jan 15, 2010

[code]...

This query works perfectly on the query analyser.

But when configuring the Table adapter ,I try executing the query and i get 0 rows affected.

What could I be getting wrong in this case.

NB:Existing GalleryID has been supplied.

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ADO.NET :: Linq To Sql Stored Procedures - Set Correct Return Type?

Dec 15, 2010

I've recently inherited an ASP.NET 2.0 project from other developers and they have a LinqToSql datacontext with stored procedures. I've been asked to modify one of the SPs which is essentially just adding a couple columns to the database table and then those to parameters to the SP. So I delete the existing SP from the L2S context and drag in the new one with the additional fields, and all hell breaks loose. Suddenly I get over 20 errors! What seems to have occured is L2S has modified many other stored procedures that I haven't even touched and changed the return type from ISingleDefault<some object> to int. I've never used stored procedures before with L2S so I don't know if this is standard behavior or not. Does anyone know why this has happened and how to fix it to set the correct return type?

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DataSource Controls :: Return Unique Rows : T-SQL Query

Jun 11, 2010

I have an SQL database table like the following:

ID // Code // Shape

The ID is the integer identifier.

On one line the Code may be OX01 and shape Hexagon for example

Then the next line the code is still OX01 but the shape is Triangle.

What I want to do is be able to pull back data for every line that is equal to a unique Code column. in the above example OX01 Hexagon would be returned but not OX01 Triangle.

I've tried using SELECT DISTINCT but it brings back all records and doesn't filter them correctly.

I've considered having another column which could have Child/Parent data so that only the parent is returned but i'm sure there must be a better way of doing this.

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DataSource Controls :: Return Default Value From LINK Query?

Sep 2, 2010

I am using the query listed below which includes multiple joins, in the result of the query I need to do some value replacement valuesExample: db.ASSETS.BUILDING_ID=300 that ID does not exist in db.BUILDINGS, in that case I need to return BUILDING_ID=0, db.BUILDINGS.NAME="Unassigned"

[Code]....

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DataSource Controls :: Linq To SQL Return All Results / Wild Sign?

Feb 2, 2010

I've been reading around, and it sounds like this is somewhat common, though I'm missing something.

I have my filtering rerouted to my codebehind via DataGridSource_Selecting event handler per

http://weblogs.asp.net/scottgu/archive/2007/09/07/linq-to-sql-part-9-using-a-custom-linq-expression-with-the-lt-asp-linqdatasource-gt-control.aspx

I have a set of controls on my page, Start Date, End Date, User, Status

Start and End Date are expected to always contain a value

User and Status I want to also have an 'All' option, where in it would return all results/not filter.

One method I can think of using for this, is the put the queries in a If scenario, where

if(user == All), use linq query B
if(user != All), user linq query A

where linq query A contains the filtering on Users, and linq query B does not.

What I have so far is

[Code]....

What I need

[Code]....

where User == ??,

can the control that populates that contain a wild card option as well? ie *, so that if user == Name, it filters on Name, or if user == *, it returns all?

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DataSource Controls :: What's Faster Working With DataSet OR Working With Collections (LINQ To Entities)

May 21, 2010

I mean, what is the faster way to get as fast as I can more than one table with stored procedure? Is there any study what is faster and why? There is a big problem getting more than one table at once with Entities, so the only way is DataSet. But I was told DataSet work very slow. Is that true?

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ADO.NET :: Creating Linq Query In Return Statement

Jan 18, 2011

[Code]....

[Code]....

creating Linq query in return statement

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C# - Return Linq Query Into Single Object?

Mar 16, 2011

I have this code in my controller:

public ActionResult Details(int id)
{
using (var db = new MatchGamingEntities())

[code]...

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DataSource Controls :: SQL Query Return Incorrect Number Of Rows?

Mar 29, 2010

I am working on a small project. I ran the query below to get the maximum userid and increase it by 1 to create a new userid. However, when I run the query, it does not display the values that I enter into the database using insert statement. For example, if I open the table called login, I can see there are three records. If Irun the select statement, it only return one record which is the one that I enter manually when I first created the table. If I run the same select statement and give it a user id that I created, it returns the correct result.

[Code]....

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DataSource Controls :: How To Get Query To Return Values From Xml Column In Table

Jun 24, 2010

I am trying to do a lookup in a table with a value stored in an xml column.

I tried this several ways but I can't get it to work.

Here is some code:

[Code]....

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DataSource Controls :: LINQ To SQL - Multiple Queries Doesn't Return Any Results

May 25, 2010

I am working on asp.net 3.5 and in MVC using Linq to SQL classes. In my MVC project i am calling stored procedure using linq to sql that conatin query joining two tables.Below is my code in Partial class

[
Function(Name="dbo.GetUserWiseThreadDetail_SP")]
[ResultType(typeof(Thread))]
[ResultType(typeof(Reply))]
public
IMultipleResults GetUserWiseThreadDetail_SP([Parameter(DbType="VarChar(30)")]
string userID)
{
ExecuteResult result = this.ExecuteMethodCall(this,
(MethodInfo)(MethodInfo.GetCurrentMethod())), userID);
return ((IMultipleResults)(result.ReturnValue));
}

In one of the controller i have made one more class

public class
MypostIndexData
{
public
IEnumerable<Thread> Thrds {
get;
set; }
public
IEnumerable<Reply> Repls {
get;
set; }
public MypostIndexData(IEnumerable<Thread>
thrds,IEnumerable<Reply> repls)
{
this.Thrds=thrds;this.Repls=repls;
}
}

finally coding of controller action method

ForumDataContext pmforum = new
PMForumDataContext();
public
ActionResult MyPosts(string userId)
{
IEnumerable<Thread>thrds;
IEnumerable<Reply>repls;
IMultipleResults result = pmforum.GetUserWiseThreadDetail_SP(userId); (this satement doesnot give any result,if i execute stored proc in
sql it give the results)
thrds = result.GetResult<Thread>();
List<Thread> thrdlist =
new
List<Thread>(thrds);
repls = result.GetResult<Reply>();
List<Reply> replylist;
if (repls !=
null)
{
replylist = new
List<Reply>(repls);
}
return View(new
MypostIndexData(thrds,repls));

I am unable to understand why i am not getting any results?

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VS 2010 - Can't Get Linq Query To Return Expected Results

Feb 13, 2014

I have a array list and am using like a database trying to search for ChildID and ParentID based on certain criteria.

My example below has the following keywords to search for:

Yellow, Mustard, Honey, Orange, Flame, Talisman

I also have a category volume value which I grab the first 2 characters to determine another filter.

My code isn't returning all matches with using 'Contains'. Right now it finds the 'Orange, Flame, Talisman'/AV record and returns 50, 28. My keywords also has 'Yellow, Mustard, Honey'/AV which should return 55 and 28 as well.

HTML Code:
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="temp2.aspx.vb" Inherits="temp2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">

[Code] ....

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DataSource Controls :: Query Using Linq To Sql?

Jun 25, 2010

Im using Linq to Sql in my asp.net application, but the problem is:I have a query like this:

[Code]....

My query is not returning anything, how do I do to get this?my problem is with this interval I need to have.

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C# - Cannot Return Proper Model Into View When Doing A Join Linq Query

Mar 18, 2011

I have this code in my controller:

public ActionResult Index()
{
MembershipUser currentUser = Membership.GetUser();
Guid UserId = (Guid)currentUser.ProviderUserKey;
using (var db = new MatchGamingEntities())
{
var MyAccount = from m in db.Accounts..........

I want to be able to do a join query between my two tables Accounts and BankTransactions. This is a one to many relationship, there can be multiple BankTransactions per Account. I want to query this and display the account information including all the bank statements that are associated with it. I did a join in order to get it, but I am having trouble handling the model. I keep getting this error:

LINQ to Entities does not recognize the method 'System.Collections.Generic.List1[MatchGaming.Models.BankTransaction] ToList[BankTransaction](System.Collections.Generic.IEnumerable1[MatchGaming.Models.BankTransaction])' method, and this method cannot be translated into a store expression.

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