Linq To XML - Getting Correct Query Result, But It's Buried Deep In The Result Var?
Mar 1, 2011
I'm having a problem with my Linq to XML query. I'm getting the result data I want, but it's nested so deep that there must be a better way.Here is my XML:
[Code]....
I'm trying to get a list (simple string[]) of all Item IDs where Category Names contains "Other".Here is my Linq:
[Code]....
[Code]....
Here is a snapshot of my result from Visual Studio:The results I want are there ("item100", "item400", "item500"), but buried so deeply in the results var.
I have this ListView that has a Drop Down List.Everything works fine (I think/hope) except that the drop down list are not showing its result correctly.This is the code.
Front-End [Code]....
The code behind consist of the page_load and the ItemDataBound [Code]....
New to Linq and Var type have a method where linq query is executed, want to return the result and assign it to GridView. but method don't take the return type as var.
So was wondering how do i return this query result?
Should i assign this result to DataTable first and make the method return type as DataTable?
Here is the code, This is what i want to do but not sure what is the right way
var result = from category in myEntities.Categories where category.UserId == userId orderby category.CategoryName select category;
What is the type of "result"? I casted it to an IQueryable variable and it worked except it did not have some of the methods normally available, e.g. Count(). In my program I have to cast it to some explicit types and then use the Count() method.
I am running a LINQ query which populates a list used by a DropDownList, I need to insert an "Unassigned" value to the list. The function below queries the values correctly from the db but does not insert the "Unaasinged" value to the list.
i have a new question: i read all the tutorials that i found but i cannot understand how to pass a result of a linq to entities result to the view so that i can display the results. My query is actually in the controller function ot the view, i would now loop the results and display them in the page. How?
I am new to this, and I am trying to implement a linq query similar to db.Genres.Include("Albums") command from
mvc music store using my current DB setup. I realize that the tutorial mentions Checlking the "Include foreign key columns in the method" when creating the tables in ADO.NET, but if I am using LINQ to SQL classes, then how can I obtain the same effect. And how do I use db.Genres.Include("Albums") to simplify my life?
For context: First of all, I am new to LINQ, as I have been using SubSonic for quite some time now.
I have two tables, Users, and Affiliates. They both have a very typical schema. The FK that joins them is the UserId field, which is in the Affiliates table. I want to create a LINQ query that pulls the Username from the Users table using the AffiliateId value. The AffiliateId is a primary key of the Affiliates table.
I have tried to accomplish this using many variations of the following code:
[Code]....
In the above query, I expect to get a single row result set. However, I instead receive the entire table of results.
How can I make this work? I have yet to see an example or article out there to do what I am trying to do.
I am having this C# string if i run this I won't get any result but i interchange the value like Between "19", " 22" then it shows correct result, to interchange this between value(In Code behind(cs file) not in Sql Server) string strQuery=Select # from [Demo].[Customer] WHERE [Demo].[Customer].[Age] Between "22", " 19" Result should be string strQueryModified=Select # from [Demo].[Customer] WHERE [Demo].[Customer].[Age] Between "19", " 22"
I am trying to display this query result in an aspx page.
It is very slow in loading. Here is the query. The inner query inside the outer quesry is the problem.(Please see the underlined part in the query) - (If I remove that part it is very fast.)
select
top 500
--This column is the issue ,Governing_Class=( case when exists (select top 1 tqc.class_code from t_quote_class tqc inner join t_quote_class_premium tqcm on tqc.class_code =tqcm. class_code where tqc.appid=pi.appid and tqc.class_code not in('8742' ,'8810','7380') order by tqcm.premium_amt desc ) then ( select top 1 tqc.class_code from t_quote_class tqc inner join t_quote_class_premium tqcm on tqc.class_code =tqcm. class_code where tqc.appid=pi. appid order by tqcm.premium_amt desc ) ......... From tables
I use the follwoing code to get a value from the SQL query. But now i would like to use some sql function like Sum() count() ... and i would like to get the result of that. vb Code: Dim constg As New SqlConnection constg.ConnectionString = "Data Source=m......." constg.Open() Dim payrollquery As String '= ("SELECT * FROM xxxxx.nnnnn WHERE ID IN(" & ID & " ) AND sent = 'U' ") Dim cmd3 As New SqlCommand(sqlstr, constg) Dim reader As SqlDataReader = cmd3.ExecuteReader
i need to make 2 funtions on an ASP.NET c# page working with an SQL server (using Visual Web Developer 2010 Express) the 1st one is a simple serach and i've done the 2nd thing is an update , the sp is like:(it works in SQL)
UPDATE [lens] SET [qty] = @b+@c WHERE [id] = @a
@a is the id which user input in the textbox1
@b is an number user input in the textbox2
now @c should be the result of an query "select [qty] from [lens] where [id] = @a"
so ,the new value of [qty] will be the "old valus"+"valus in textbox2"
my query is like this " select product_id, product_price, purchase_amout from purcases"
and on my formview i tried to add a "total purchase"
i tried using <asp:Label ID="total_purchase" runat="server" Text='<%# string.format(cint(eval("product_price")*eval("purchase_amout")),"{ Rp 0:###,###,###,###,###}")%>'>
the total amount show the correct calculation result, but the string format dont work.... so it display 20000 instead of Rp 20,000
btw. "Rp" is the currency symbol in my country... i dont use {0:c} coz the server user US currency
I would like to get the list of users (from db) who meets my SQL select statement, and send email for each of them.my current looks like this
Code:
Dim constguser As New SqlConnection constguser.ConnectionString = ConfigurationManager.ConnectionStrings("xxxxxxxx").ToString Dim email1D, email2D, userNickName, userName, rc As String constguser.Open()
[code]....
If i run this code its only going to get the name and email of the first result found. I was wondering if there is a faster way to get all user result from the sql query, myb using a for loop?
How can I pass the result of the linq to a textbox?
Code: string search = txtSearchPO.Text; IPSBLL.TransactionInfo dbInfo = new IPSBLL.TransactionInfo(); var q = from info in dbInfo.GetTransactionInfo() where info.PONumber == search select info; txtPONumber.Text = q;
I need to access the column data something like this:
Code:
DataTable.Rows[index].columnName How can I do that in LINQ?
