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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Similar Messages:

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 :: 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 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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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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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"

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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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ADO.NET :: Creating Linq Query In Return Statement

Jan 18, 2011

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[Code]....

creating Linq query in return statement

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Return Anonymous Type From LINQ Query In VB.NET

Mar 25, 2011

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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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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DataSource Controls :: One Linq Query With Two Db Connection?

May 31, 2010

I want to use from two db connection in one linq query

My sample is:

int a=1;
if(a==1)
DataClasses1DataContext1 db = new DataClasses1DataContext1();
else
DataClasses1DataContext2 db = new DataClasses1DataContext2();
var q =
from c
in db.F_Groups
select c;

In this code a=1 so db connection is DataClasses1DataContext1

I want if a=2 then db connection = DataClasses1DataContext2

but this code is error.

db connections is completely same but in two deferent class a db connection is sql and another is oracle

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DataSource Controls :: How To Convert Sql Query To LINQ

Feb 13, 2010

How can I convert this sql query to LINQ ?

[code]...

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DataSource Controls :: Linq To Sql Query / Zip Codes?

Feb 18, 2010

Im doing thing profile, zip code thing on my site. One table has a list of zipcodes and in the other is a profile and there they keep what zip code they entered. I already have the radius code but idk how to get a list of all the profiles in a radius.I'm going to store the zip codes that come back from the zip code table in a arraylist and put it in a session state so i don't have to keep getting the same thing over and over again. The problem is i don't know how to write the linq to sql query to take the arraylist of zip codes and look up all the users that have that as there set zip code in there profile.

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DataSource Controls :: Add A New Item To A LINQ Query?

May 13, 2010

So I'm trying to add a single item to a query I wrote. The query is then pass to the e.Result of a LinqDataSource_Selecting event. This datasource is being used by a dropdown list and label in a listview.

I am trying to add a "New" field to the end of the list.

Currently I have this working, but it seems like a really messy solution. First I make a class with the fields I need:

[Code]....

Then I build the query:

[Code]....

Then a second list and query with the new value:

[Code]....

Finally, I union the two and set the e.Result:

[Code]....

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DataSource Controls :: Retrieve Value From LINQ Query?

Mar 20, 2010

I need to know how to extract the result of the attempted LINQ query below and set it equal to the strFile variable.Everything Intellisensed OK here but ine 5 shows a syntax error at the parenthesis.

[Code]....

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DataSource Controls :: Linq Query With OrElse?

Apr 7, 2010

I'm having a problem with a Linq query where is executing the second half of an OrElse even though the first half evaluates to true.

[Code]....

When Manufacturer is null, I get a NullReferenceException. The "Manufacturer.Trim()" should never be executed, because the first half of the OrElse evaluates to true. Just to test it out, I also tried this:

[Code]....

This actually works fine... Manufacturer.Trim() is never executed, and I get no error. Why is the Trim() statement being executed in the first case? If Manufacturer is null, then it shouldn't be.

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DataSource Controls :: Random Results From A LINQ To SQL Query?

Jan 23, 2010

I have this LINQ query:

var agnts = (from a in db.agents select new { a.userid, a.name }).Take(10);

How can I get randomly get 10 records from my agents table?

I have tried:

agnts = agnts.OrderBy(n => Guid.NewGuid());

but this doesn't seem to do anything.

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DataSource Controls :: SQL Query Re-Write In Linq To Entity?

Jan 26, 2010

Need to figure out the correct way to do a simple SUM function in Linq, but also manipulate one of the feilds coming back by doing a Substring on it, here is the original SQL query:

[Code]....

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