.net - Will Linq To Sql Work In An .net 2.0 Web Application
Apr 9, 2010Will linq to sql work in an asp.net 2.0 web applicationJust realized the server doesnt' support asp.net 3.5 (no control over it
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Aug 10, 2010When i type and run the following query in ASP.net, then get a error ("Comparison of the data types ntext, text, XML and image data types can not be processed by SQL Server.") (translated from Dutch...)
var gebruikerrow = from u in db.Users
where u.login=="dsf"
select u.login;
foreach (var Result in gebruikerrow)
{
Label50.Text += Result.ToString() + " ";
}
What am i doing wrong?
the Datatype for login (in the table Users) is Text.
AJAX :: Auto Complete With LINQ Can't Get To Work?
Jan 27, 2011I have been tasked with a duty to get auto complete to work on a simple employee search web form that I have created. And after looking at the tutorial I have an idea of how to get auto complete working and in the instance of my page I have it working with the sample data from the tutorial. So my question is this. How do I get it to work/quary from the SQL database that I have? I have tried several combinations and I can't seem to get it to pull from the DB. Below is the full code to my C# page with LINQ
[Code]....
C# - How To Build A Silverlight Application And Have It Work Under Application
Aug 7, 2010If I need to build a silverlight application and have it work under my asp.net application!
Does that mean I have to create two different vs projects?
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ADO.NET :: Entity Frame Work Make Use Of Linq To Entities?
Mar 6, 2011can we say like "Entity frame work make use of linq to entities"?
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DataSource Controls :: Cannot Work With System.Data.Linq.Table
Mar 31, 2010Is there a way to do the following in VB:dim sTableClass as string = <my underlying table class in linq>dim dbTab as system.data.linq.table(<typed class of sTableClass>)I've tried cycling through the table objects of the linq data context and retrieved the following: Dim ddData = pkDB.GetTable(tt.RowType.Type.UnderlyingSystemType)(where tt reflects the row of the table I want to retrieve) But the expression returns and itable and I need the table equivalent but can't get this to work with a stri
View 1 RepliesDataSource Controls :: A Simple LINQ Query Doesn't Seem To Work?
Feb 26, 2010I have records with and without a email entered in the field called 'email'.
This one works:
Return From p In db.myTable _
Where p.Email.Length > 0 _
Select New With {.p.Name, p.Email}
but this doesn't
Return From p In db.myTable _
Where p.Email.Length = 0 _ ( nor does Where NOT p.Email.Length > 0 )
Select New With {.p.Name, p.Email}
Am I missing something?
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Jul 21, 2010I need a Listview that will show info from several database tables. My delete button, will not delete the record from the database. I cannot get DeleteOnSubmit() to work at all. I am in the very beginner stage. This is my first project. I thought this would be a good project for learning purposes.
Here is my code:
[Code]....
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Jan 25, 2011i followed this tut http://www.ajaxprojects.com/ajax/tutorialdetails.php?itemid=554 for cascading drop downs, but i changed the sql connections for my linq datasource. VS2010 is showing no errors in my code and the page loads fine too, but the two drop down lists are emptycan anyone scan there eyes over it and see if theres any reason why it shouldnt be working?my code is the same as the tuts apart from it uses LINQ instead of SQL
[Code]....
.net - LINQ To SQL Web Application Best Practices
May 7, 2010In my experience building web applications, I've always used a n-tier approach. A DAL that gets data from the db and populates the objects, and BLL that gets objects from the DAL and performs any business logic required on them, and the website that gets it's display data from the BLL.I've recently started learning LINQ, and most of the examples show the queries occurring right from the Web Application code-behinds(it's possible that I've only seen overly simplified examples). In the n-tier architectures, this was always seen as a big no-no.I'm a bit unsure of how to architect a new Web Application.
View 2 Replies.net - Linq To Sql Datacontext For A Web Application
Mar 20, 2010I'm trying to use linq to sql for my project (very short deadline), and I'm kind of in a bind. I don't know the best way to have a data context handy per request thread. I want something like a singleton class from which all my repository classes can access the current data context. However, singleton class is static and is not thread-safe and therefore not suitable for web apps. I want something that would create a data context at the beginning of the request and dispose of it along with the request
View 1 RepliesC# - Very Slow Web Application Which Use LINQ To SQL?
Jul 17, 2010I am developing sample web application which use C#, and LINQ to SQL. The application is very very slow and it takes about 2 secs to navigate between pages. I have already used SQL Profiler and monitor the calls to the SQL server. All SQLs looks normal to me and their execution time is always about 1 or 2 millisecs.I tried the same application in another PC and it is the same. So, it is not because of my computer performance.
View 3 RepliesADO.NET :: LINQ And Web Application Connection Strings
Dec 25, 2010i want define connectionSreing in the web.config and then use it for DataContext ConnectionString. i do that : 1. i creat a class in App_Code :(MisaghDB is my database)
partial class MisaghDataContext
{
partial void OnCreated()
{
this.Connection.ConnectionString =
ConfigurationManager.ConnectionStrings["MisaghDBConnectionString"].ConnectionString;
}
// or
public partial class MisaghDataContext
{
public MisaghDataContext() : base (ConfigurationManager.ConnectionStrings["MisaghDBConnectionString"].ConnectionString)
{
OnCreated();
}
}
}
2. Add the connection string to my web.config file:
<configuration>
<connectionStrings>
<add name="MisaghDBConnectionString" connectionString="Data Source=NAZLIN-HP;Initial Catalog=MisaghDB;Integrated Security=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
3. Right click on the DBML file design surface and chose properties. Select "none" for the Connection property.now should i change DBML file designer.cs (Misagh.designer.cs) ? The code should I delete in this file(DBMLfile designer.cs)? this is a part of my DBMLfile designer.cs :
[global::System.Data.Linq.Mapping.DatabaseAttribute(Name="MisaghDB")]
public partial class MisaghDataContext : System.Data.Linq.DataContext
{
private static System.Data.Linq.Mapping.MappingSource mappingSource = new AttributeMappingSource();
public NorthwindDataContext() :
base(global::WindowsFormsApplication2.Properties.Settings.Default.NorthwindConnectionString, mappingSource)
{
OnCreated();
}
public NorthwindDataContext(string connection) :
base(connection, mappingSource)
{
OnCreated();
}
public NorthwindDataContext(System.Data.IDbConnection connection) :
base(connection, mappingSource)
{
OnCreated();
}
public NorthwindDataContext(string connection, System.Data.Linq.Mapping.MappingSource mappingSource) :
base(connection, mappingSource)
{
OnCreated();
}
public NorthwindDataContext(System.Data.IDbConnection connection, System.Data.Linq.Mapping.MappingSource mappingSource) :
base(connection, mappingSource)
{
OnCreated();
}
............}
ADO.NET :: Linq To SQL - Handle Concurrency In Application
Aug 10, 2010I am trying to handle concurrency in my application. Basically if user A has a support ticket open which currently has a status of 'Active' and user 'B' opens the same ticket and closes it (changing its status to closed), I would expect a confict execepton to be thown when user 'A' tries to close the support ticket. For some reason this is not happening. I have checked that Update check is set to 'Always' in the dbml file. Here is an exerpt of my code. // Update 'Active' lead to 'Close'
[Code]....
ADO.NET :: Create Large Application Linq To Sql?
Dec 26, 2010i am curious to know which is generic way to create DAL which can be used to large application and small applications using ?
1) What can i use to create large application Linq to Sql OR Entity Framework Or Any others ?
Application Variables Work The Same In Both ASP And ASP.NET
May 16, 2010This question actually refers to a classic ASP page I'm working on, but I'm assuming that app variables work the same in both ASP and ASP.NET Let's say we have a bunch of websites, owned by different people. The sites are all different, but the common theme is they are car enthusiast websites. Each of these websites has their own unique index page (of course), but also "common" pages, which are pages shared by all the websites.
One of the common pages, checks for the value of an application variable, which may or may not exist. For example, lets call this page luxurycars.asp, which is a simple page that shows the top 10 luxury cars of this year. This common luxury car page will pull and use the app variable like so:
[CODE]
Dim SiteOwner
SiteOwner = Application("OwnerName")
Response.Write("This site is managed by " & SiteOwner)
[/CODE]
This app variable is set uniquely in each clients index.asp page like so:
[CODE]
Application("OwnerName") = "John Doe"
[/CODE]
Will this work? I just started learning classic ASP (for my job), and I'm reading that application variables are universal and only one copy of the variable will exist. So does this mean if John Doe sets Application("OwnerName") to "John Doe" in HIS index.asp page, will everyone that visits the common luxury car page see John Doe's name? Regardless of whether they got to that page via John Doe's page or someone elses? And if so would using a Session variable instead solve this problem? Sorry if this sounds confusing, let me know if I need to re-word it or give more detail...
How To Work With A Web Application And Sub-Apps
Jun 18, 2010I'm starting to think about and develop an architecture for a big web application, and I wanted to get suggestions and/or recommendations on which technologies and/or frameworks to use.The application will be an Intranet-based web site using Windows authentication, running on IIS and using ASP.NET. It'll need to be structured as a main web application with sub-web applications. Essentially, the entire scope is a composite browser-based, Intranet application that is composed of discrete, functionally complete modules or sub-applications.
View 2 RepliesHow Html5 Work In Application
Apr 1, 2011Please give an example how I can integrate HTML code of offline caching in my ASP.Net application?
View 2 RepliesApplication Work Independently?
Apr 27, 2010using visual studio 2008 and asp.net 3.5 and DB2. my project will give some of the records to the DataAccess layer to add the data into datbase. Untill the process end i have to wait(it's a big operation) for a long period, what i expect is, i'll hand over the data to DAL and my application will continue further works, how to do that?
View 14 RepliesSql - Web Application Security Don't Work On IIS 7?
Jan 20, 2011i use visual studio 2010, SQL express 2008 on win server 2008
after running the wizard of security (created single user, set permissions like deny anonymous and allow the created user) and pressing F5 --> the site works just fine.
when i move the folder to IIS 7 and "convert to application" the login page appears but it wont accept the password i provided.
i was told that only Stackoverflow geniuses will answer this question.
i am using .Net 4, manged pipleine mode --> inegrated
IIS settings:
Anonymous Auth. --> Enabled
Forms Auth. --> Enabled
ASP.Net Impersonation, Basic Auth, Digest Auth, Windows Auth--> Disabled
web.config
<configuration>
<connectionStrings>
<add name="ApplicationServices" connectionString="data source=.SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient"/>
[Code]....
the username exists in aspnet_Users table and the username "encrypted" in aspnet_Membership table
UpdatePanel Does Not Work In A Web Application?
Mar 27, 2011I have the following simple code:
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:LinkButton runat="server" Text="Refresh"></asp:LinkButton>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="LinkButton1" runat="server" Text="<%# DateTime.Now.ToString() %>"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
And in the master page there is a ToolkitScriptManager. but the update panel does not work never similar to they do not exist.
Note: I use .Net 4.0.
Edit: I removed the ToolKitScriptManager and added ScriptManager and the problem still exists. Seems the Ajax functionality is disabled in my application but I do not know how.
4.0 Child Application Does Not Work On IIS 7.5?
Jun 21, 2010I have a Website on IIS 7.5 configured as shown below.
ParentWebSite
---ChildWebApp
ParentWebSite is an Asp.Net 4.0 Website project.
ChildWebApp is an Asp.Net 4.0 Web Application.
When I access the following url it works fine.
http://ParentWebSite/
When I access the childWebApplication using the following Url.
http://ParentWebSite/ChildWebApp
It gives a compilation error showing one namespace (ParentWebSite.BLL) not found. But that namespace is used only in ParentWebSite and not at all referred in the ChildWebApp.
My question why is my ChildWebApp dependent on the ParentWebSite dll?
Is not the ChildWebApp when deployed as above independent of the ParentWebSite when both are using there own App Pool?
MVC :: NullReferenceException Was Unhandled By Usercode In Application Using Linq To Sql
Feb 16, 2010I am getting an exception like"NullReferenceException was unhandled by usercode-Object reference not set to an instance of an object." in (IEnumerable)Viewdata.Model.
<% foreach (EmployeeMaster m in (IEnumerable)ViewData.Model)
DataSource Controls :: LINQ To SQL For Web Or Desktop Application (WCF)
Apr 1, 2010is it good for desktop application (WCF) or web application.I am little confuse about LINQ functionalities i have read some articles which are discourage LINQ (due to poor performance) for web applica
View 3 RepliesVisual Studio :: How Many Layers In LINQ Application
Apr 1, 2010I have question about N-tier architecture. everyone about 3-Layer architecture these are:
1). UI Layer,
2). Business Layer,
3). Data Access Layer.
i already have worked on this.
Then i heard about LINQ to sql. how many layer an web application should contain.
As my knowledge. if i use LINQ to slq then i have to worked only 2-Layer:
- Data Acess/Business Layer: which contains only *.dbml files which is my database and
- UI Layer: which contains *.aspx files.