i have this procedure:
[Code]....
the difficulties are the follows:
1)i cannot know how to execute stored procedure with LINQ
2)how can i set value to my properties after a selection?
3)how can i set optional parameters in a stored procedure by LINQ?
I've got a static class containing a static field which makes reference to a wrapper object of a DataContext.
The DataContext is basically generated by Visual Studio when we created a dbml file & contains methods for each of the stored procedures we have in the DB.
Our class basically has a bunch of static methods that fire off each of these stored proc methods & then returns an array based on a LINQ query.
Example:
public static TwoFieldBarData[] GetAgesReportData(string pct)
{
return DataContext
.BreakdownOfUsersByAge(Constants.USER_MEDICAL_PROFILE_KEY, pct)
.Select(x => new TwoFieldBarData(x.DisplayName, x.LeftValue, x.RightValue, x.TotalCount))
.ToArray();
}
Every now and then, we get the following error:
There is already an open DataReader associated with this Command which must be closed firs
This is happening intermittently and I'm curious as to what is going on. My guess is that when there's some lag between one method executing and the next one firing, it's locking up the DataContext and throwing the error.
Could this be a case for wrapping each of the DataContext LINQ calls in a lock(){} to obtain exclusivity to that type and ensure other requests are queued?
Any one can suggest a method to convert Datareader to dataset or any alternate method
View 7 RepliesThis is surareddy. i nead some small clarification in the "Stored Procedure"
how to convert the oracle Stored Procedure to sqlserver2005/2008 Stored Procedure.
right now i am enhancing the project that project already developed the oracle Stored Procedure. now our company is using sqlserver 2005/2008.
how to convert the Oracle Stored Procedure to sqlserver 2005 Stored Procedure
I'm having a method that exports content from the database to excel files. The method taks as paramaters a DataReader param and a int param - the number of rows. For the number of rows i'm using a dataset, wich i fill using the same query as for the datareader. So I'm executing it twice... Is there a way I can avoid that? get the number of rows from the datareader?
View 1 RepliesI have the code below could to rewrite from LINq to SQL to Linq to Entity.
[code].....
I am getting an error that an open DataReader associated with this Command, when I'm not using datareader(though probably executereader() is the same thing) how would I close this if I don't have a datareader present?
using (SqlConnection conn = new SqlConnection(ConnectionString))
{
SqlCommand cmd = new SqlCommand("spSelectAllTypes",conn);
cmd.CommandType = CommandType.StoredProcedure;
[code]...
I just want to be able to databind a bunch of dropdownlist in one open connection. (before I had multiple open and closes for each control)
I am trying to re-write an existing asp.net website using MVC with Linq to SQL. A page we have is used to insert new contracts and uses usp_contract_insert to insert a new contract into t_contract as well as t_project. On my dbml file i have dragged t_contract on and then I try to drag usp_contract_insert on top of that and I get the error :- Microsoft Visual Studio
One or more selected database objects return a schema that does not match the schema of the target data class. Nothing has been added to the designer. The stored procedure returns the id of the last project which was inserted. I don't quite follow this and unsure how to go about hooking my Controller up using Linq to SQL to call this stored procedure
I am using LINQ to SQL for inserting, updating my DB now i am using stored procedures to do the same,but i dint find any advantages or less code in using stored proc what is the main diff between using stored proc and not using stored proc?
View 1 RepliesI am inserting records using stored procedures in LINQ to SQL but i am getting an error at empid
[Code]....
i am getting error like Table 'emp' does not have the identity property. Cannot perform SET operation.how to solve this??
Today is my first day using ASP.NET MVC, and I'm finding it very intriguing. I only just started learning asp.net.
So basically I'm trying to call a procedure from an MSSQL database, and with it I need to send a paramater "PlaceID", which is an integer. This procedure basically just picks out a number of columns from different tables in the database. Here is the Linq to SQL code
The ultimate goal is to be able to retrieve all the information and return it as JSON with a function that will be available for a javascript.
I'm wondering what is the best way to proceed from here. I know I have to create a view, but I'm still unclear exactly on how I can call the procedure and make it store all the information. I could really use some help on this, some code examples would be excellent. I already wrote a C#.net function to convert a datatable to JSON using a stringbuilder, but I get the feeling there is a smarter way to do things.
I am trying to execute a stored procedure in LINQ. When run in SQL Server it returns several fields, mostly integer and float fields. But when I call the stored procedure in LINQ, all it returns is 0. Here is how I am calling the stored procedure :
[Code]....
And here is the stored procedure :
[Code]....
I am new to Linq server.I have a stored procedure in my databse that retuens count number.
select COUNT(*) from tbl_WorkerUsers
where WorkerCode=@Wcode
when I run it directly in my database it returns 1.
exec checkWorkerCodeAvailibility 100000312
but when I run it in c# code it always returns null.
WorkerDataContext Wkc = new WorkerDataContext();
int? result = Wkc.checkWorkerCodeAvailibility(Int32.Parse(Wcode)).Single().Column1;
i am using stored proc in linq to sql but i have done insert & delete operations but im unable to do the select operation i have tried but no use,whenever i enter the id into the textbox it should display the record?
View 5 Repliesvar query = from p in dc.Patients
select p.PAge;
Can i get PAge value in an any int like....
int PAge = query.Single();
I'm trying Convert.ToInt32(-----------------)
but this give me Error on run time
I have a MVC project that has a Linq to SQL dbml class. It is a table called Clients that houses client information. I can easily get the information to display in a View using the code I followed in Nerd Dinner but I have added a stored procedure to the dbml and it's result set is of IQueryable, not IQueryable. I need to convert IQueryable to IQueryable so I can display it in the same View. The reason for the sproc is so I can pass a search string tothe sproc and return the same information as a full list but filtered on the search. I know I can use Linq to filter the whole list but I don't want the whole list so I am using the sproc.
Here is the code in my ClientRepository with a comment where I need to convert. What code goes in the commented spot.
public IQueryable<Client> SelectClientsBySearch(String search)
{
IQueryable<SelectClientsBySearchResult> spClientList = (from p in db.SelectClientsBySearch(search) select p).AsQueryable();
//what is the code to convert IQueryable<SelectClientsBySearchResult> to IQueryable<Client>
return clientList;
}
I have function like
Public Dataset getdata() {
dataset = db.prcGetdata("name");
return dataset; }
db is linq. prcGetdata is a proc which accepts name param and returns 1 or more rows. So, my requirement is how to get data to dataset using linq.
I am working on LINQ. I am calling a SQL Stored Procedure with 2-3 parameters it's working fine. When i am going to call Stored Procedure with 8 to 9 parameters the auto generated column is not comming automatically. So i am unable to use LINQ with Stored Procedure with multiple parameters.
View 4 Repliesi have create the object of
1 dataclassContext obj=new dataclassContext();
2 now i call the updateProc
int row=ob.MyupdateProc(QuestionID,peronID);
if(row>0)
{
do some thing
}
but row always retrun 0 even procdure do update in database
I have created one stored Procedure as
[code]...
I am not getting the result with extra column c.I am not getting what is the Problem.In sql server,It's working fine.
Is it posible to run a stored procedure using linq? I dont mean one that returns a table i just mean one that runs a set of transactions exec sp_MyProc @Var or something?
View 1 Replieshow do you convert the WHERE clause of this statement to Linq ?
View 1 Replieshow convert this sql query in linq,
SELECT COUNT(AdvisorID) AS AdvisorRegisterLast2Days FROM ob_Advisor WHERE CONVERT(varchar,CreationDate,101) BETWEEN CONVERT(varchar,DATEADD(day,-4,DATEADD(day,2,GETDATE())),101) AND CONVERT(varchar,GETDATE(),101)
i do have a stored procedure which inserts data and the message should be displayed that data has been sucessfully updated or not
[code]....
I'm executing an update stored procedure from LINQ to SQL and I need to know the records affected after the update is called. I'm using dbml designer to generate the LINQ code.
View 4 Replies