I have a list of 'client_object', and I want to copy this list into another, I've tried to do a CopyTo, but when I change any value in any list, the chages are done in both..I would like to create a duplicate of the objects, not a reference..
View 3 RepliesImagine I have a class MyTestClass. And I need an instance of this Type throughout my whole web application.Now there are several possibilities to accomplish this.1. Make MyTestClass static, make it contain static methods only
Probably the most performant solution. I'm not feeling lucky about using static fields though. Thread safety? What if my static class contained a static System.Collections.Queue?
I used bind all GridViews, DetailViews etc. on my page using an ObjectDataSource (unless it wasn't possible to do so). Recently, I've started binding all my contols programatically. I find this a lot cleaner and easier, though some may disagree. Binding with a ObjectDataSource obviously has it advantages and disadvantages, as does doing it programatically.Say I bind a GridView programatically (e.g. GridView1.DataSource = SomeList), when I change page on the GridView, I have to also code this. Each time the page changes I have to call GridView1.DataSource = SomeList again. Obviously with a ObjectDataSource I don't need to do this. I normally stick my SomeList object into the ViewState so when I change page I don't need to hit the database each and every time.
My question is: Is this how the ObjectDataSource works? Does it store it's data in the ViewState and not hit the database again unless you call the .Select method? I like to try and get the best performance out of my applications and hit the database as few times as possible but I don't really like the idea of storing a huge list in the ViewState. Is there a better way of doing this? Is caching per user a good idea (or possible)? Shall I just hit the database everytime instead of storing my huge list in the ViewState? Is it sometimes better to hit the database than to use ViewState?
I want to create duplicate table, in oracle I am using "create table dup3 as (select distinct * from dup2) " this sql query but when I run this query in SqlServer then error is coming.
View 5 RepliesI am using the built in database with the tables (i.e. membership, users, etc...). I created my own table (relationships), but when I try to create a row that uses the same email address it says "cannot create duplicate entries". I am not allowing duplicate email addresses in the membership table. That did not work because I couldn't convert System.Guid to long. So, I decided to do it by email address. I changed idRequester to requesteremail and the same for receiver. However, when I try another record with the same email address in either field, it does not accept it.
View 1 RepliesI need to create an Asp.net Calendar Control with Daily-weekly-Monthly & Yearly view This Control should Have Some Events , Properties and some Methods as its clear.
This Control should be capable to add tasks ( jobs) and some photos in each day Also Should have Remainder and should be Full Ajaxable.
So As I'm not familiar with Custom Control, What Do you recommand to read and whats your advise to have a fast and Stable Control.
Do You know Any Open Source ASP.net Control like this ?
I used Object Test Bench to test my classes in VS 2008 professional edition . Right click on Class name and then selected create instance ,then its Constructor, there comes a dialog box, that just gives a message and a TextBox field is present there, i filled that field with any name and clicked OK.Then error message comes that "Create Instance Failed" and its error code is "0x80004005" . What's this ? How to instantiate object of my classes ?
View 4 RepliesI have a gridview with delete buttons for each record (I've used AccessDataSource). I have loaded the data in and have many duplicate records.
I just want to use the delete button delete each duplicate record while remains many duplicate records. For example:
I used the following query to load in duplicate records:
SELECT * FROM TableA WHERE ([ControlA] IN (SELECT [ControlA] FROM TableA GROUP BY [ControlA] HAVING (COUNT [ControlA]) > 1)))
ID ControlA PIN# FaceValue Date
delete 76637 128232 1234 5 6/4/2006
delete 72722 128232 1234 5 6/4/2006
delete 76638 234567 2345 10 7/3/2006
delete 72723 234567 2345 10 7/3/2006
What is the query to delete single duplicate record instead of deleting all duplicate records?
I have developed a website in asp.net framework 2 . This website is being hosted in two different servers without any change in code. My issue is about the performance of these 2 sites. One website is taking much time for inserting datas to the DB (SQL server 2005). 2 websites are having different DB server.
I think the issue is for the DB server. How can we rectify the DB performance while insertion and Is there any other cause for this permance issue?
I am not sure if this is the right forum. I can not find a forum for LINQ.
I am working on an application using LINQ. Application performance is not up to par and my tests show that it is LINQ queries that are slow. I was wondering if anybody can recommend where I can find an article about optimizing LINQ performance maybe by compilation or other methods.
I am creating a service oriented application where trying to have everything using services....however there is something I am not sure of , I am having a page that calls the database at the page load...so what would be better and faster?? to call database in pageload , or to call wcf service from javascript during javascript load ??btw , I am using a repeater in the page , but I have created somekind of an engine to create the suitable html so...I'll be creating the repeaters html using the wcf and resend it back to the page If I am using a wcf service at the start.
View 1 RepliesI developed a site for a client a couple of years ago. It uses the the standard ASP.NET Membership, authentication, etc. I just added the profile section with (2) fields: CustID AgntID. Now whenever I load the page with any Profile code in it I receive this error: Violation of UNIQUE KEY constraint 'IX_aspnet_Users'. Cannot insert duplicate key in object 'dbo.aspnet_Users'. The INSERT statement conflicted with the FOREIGN KEY constraint "FK__aspnet_Pr__UserI__3CA9F2BB". The conflict occurred in database "broo001", table "dbo.aspnet_Users", column 'UserId'. The statement has been terminated. The statement has been terminated. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: Violation of UNIQUE KEY constraint 'IX_aspnet_Users'. Cannot insert duplicate key in object 'dbo.aspnet_Users'. The INSERT statement conflicted with the FOREIGN KEY constraint "FK__aspnet_Pr__UserI__3CA9F2BB". The conflict occurred in database "broo001", table "dbo.aspnet_Users", column 'UserId'. The statement has been terminated. The statement has been terminated. Source Error:
[Code]....
Stack Trace:
[Code]....
Here is the code from my web.config:
[Code]....
Here is some of my page code:
[Code]....
i when i m set some value in data object. and create new object in form then new object contain previus value in it.
View 2 RepliesRegarding Linq to SQL with .SQLEXPRESS and VS2010 on Windows 7, I am trying to add a list of entries to an empty table that I have confirmed programmatically does not have duplicate keys. Some info about the situation:Note: The key strings have Unicode characters (English and Chinese mixed).
View 6 RepliesAs some may be aware, I recently posted about high memory usage on my website and I have an idea that my thumbnailer may have something to do with this as I am not actively disposing of the instance when it has been used due to my misunderstanding how it works.
I am now looking at my code for the thumbnailer and would like some advice on when something would actually need disposing of, is it ONLY when you create a new instance of an object?
Like:
Target := System.Drawing.Bitmap.Create(Trunc(Width), Trunc(Height));
MyImage := Target.FromFile(PhotoPath);
So, my question would be, do I need to dispose of both Target and MyImage to make sure the GC does what it needs to do properly?
I'm creating a system where data is coming from a database. This data represents certain object that has to be created dynamically.
Now to let the object work into a build framework that I use. I need to set the object at the top of my class like this.
[code]....
To set the properties of the object dynamically isn't a problem. The problem that I experience is that I don't know how I can dynamically create the
public ColorPickerWidget com1 {get; protected set;}
I have a object named post and I declare a new variable named newPost as type post object and then
var newPost = post
but when I Modify any properties of post object, that Modified Influences properties of newPost object.
Create object for list in or out of while loop?
Code:
[code]....
My question is, is there any benefit to instantiating a new userDetails object in every loop, or can this be created outside the loop and title, forename and surname just written over with every pass of the loop?
I am using a view to create some new categories in the DB but the object the [httpost] create method receives is empty, now this does not always happens. I did double check with other catalogscontrollers and so far the implementation is the same... It only happensds when i try to create a new category the CategoryController
[Code]....
the ViewModel
[Code]....
my create view is strongly typed to ViewModel and has this relevant code create.aspx
[Code]....
and my ascx file is strongly typed to the entity model directly. when the "create" button is pressed and Exception is catched and returns the same view... I have implemented this for other catalogs and works fine except for this one...any clues... by the way i´m using entity model ...
I have an API DLL which is a COM object. I've used this DLL in a Winforms application successfully. When I use it in ASP.NET application I get the E_OUTOFMEMORY error: "Creating an instance of the COM component with CLSID {} from the IClassFactory failed due to the following error: 8007000e" when I create an instance of the COM object.
Although I don't think it is a security issue, I've tried using windows authentication and also to give privileges to the ASPNET user with no use.
I don't have the source code of the COM object.
I'm using .NET Framework 3.5.
Automation server can't create object
View 1 RepliesI want to pass an XML object from code behind file of an aspx to an class library.for that how can i create a XML Object.
View 3 Replies1) I want to know what is the recommended way to create & return a DTO for an object which has 10 attributes and I only want to return 2 with my DTO object.
2) Should DTO's have their own namespace ? If yes, how do we organize them ? Each DTO inside a single class file or all DTO's inside a single class ?
We all know that, we cannot create the object of Abstract class.
But why it is so?
I mean, can anyone explain it with real time example?
how to create object of HttpResponse class
HttpResponse response=new
HttpResponse (TextWriter
tx);
how to inplement this wrong code to right one & how to implement TextWriter.