tried the following:
public void UpdatePlayer(int id)
{
Player player = new Player() {ID = id};
player.Password = "12";
Entities.Players.Attach(player);
Entities.SaveChanges();
}
No change at the db.
If I disable javascript and cookies, [URL] detects that cookies are disabled without a redirect. If you click the cart link, there's only a get on the cart page.
I'm guessing [URL] is most likely not using ASP.NET, but how would you accomplish detecting disabled cookies using ASP.NET without the use of javascript and redirecting? Is it possible to detect if cookies are disabled in one round trip?
I'm looking at ways to reduce the quantity of Round Trips to my site for my clients. Right now I have several images that I think should be combined into a single image like this:
[URL]
and then spit out some CSS like this:
[URL]
... that way I can reduce the round trips and increase the speed in which my site is used (after the first load). Is there any simple tool that will do this for me? I figure it's 2010 and someone somewhere automated this. I have Visual Studio, and Expression Web and don't see it there
I am writing a program to measure the latency(response round trip time) for a web service. I need to have this at client side.
My initial plan is to store the time at which request is sent and then calculate the difference in time when we recieve a response from the web service. Is this the correct way to measure latency of web service. This has some overhead because of storing time and all. How can this be done?
Another option is to attach a timestamp with the SOAP request. But the server should return the timestamp. This will not be possible in case of third party web services.
I'm trying to calculate a customer tax.
[Code]....
I really nead any appropriate function to fix it.
I have an EDM, it includes the entities extension and history. My goal is to use history to keep track of all the changes made to extension entity. For example, if extension with ID 223 has its property 'Name_Display' changed - I want the history entity to record this.
I'm using ASP.NET with VB.NET. Where in my code do I put the hook to say, "update the history entity" and what should that hook look like?
I am mapping a stored procedure to an entity by right clicking on the entity (in the .edmx) and selecting "Stored Procedure Mapping." This brings you to a Mapping Details - "Name of Entity" Window that allows you to select the insert, update, and delete stored procedures associated with the Entity. It also maps the stored procedure parameter to the Entity "Property" (Column).
I'm gettin an error "error 2042: Parameter Mapping specified is not valid." The cause of the error is fairly obvious, in the Insert stored procedure that has been selected, a 'CHAR' parameter is being mapped to an Int32 Entity Property. I altered the stored procedure parameter to match the entity, I deleted the stored procedure, readded, and reslected it as the Insert function. I also cleaned, validated, updated model from database. No matter what I do, the parameter list in the mapping details doesn't reflect the change to the stored procedure. It's stuck on a char --> int32 mapping, even though it has been changed, like it's buried deep in meta data some where.
I'm writing a custom .NET MembershipProvider (not the built in one) and trying to update using Entity Framework. But of course i have no access to (Try)UpdateModel. How can i update it?
View 3 RepliesI am using EF4 with POCO entities and having problems to update an existing item. In a webbapp I have an ajax function fetching an entity object from the database through EF4. Then i make some changes to it and when I try to update the record in the database I call the Attach-method but it is not saved. I guess this has something do with that I am not in the same context anymore...so my question is how to make an update of a previously fetched record if the context which was used to fetch record is disposed?
View 3 RepliesI have following problem: in the Controller I call TryUpdateModel to send the changes made in the form back to the database. Then I save the entity, but no changes to database are made.
Here is the code from Controller:
[Code]....
Then the changes made to database. (ChangingSet have then also pending changes).
I have been updating my Entity Framework by simply right clicking and clicking on "update model from database". I usually go under the "Add" tab and then click the tables and click finish. I also use "refresh" sometimes as well. What are the differences between these? and also when I do refresh or add sometimes the entity comes out wrong or keeps some of the old information in cache, how can I just get the entity to match my database and clean out any of the old cached things.
View 3 RepliesIs it better to have the calculated field returned with the rest of the results or is it better to calculate it later when you need it?
Example: I have a GridView that displays search results that has many fields like:
Application ID
Name
Account Type
Account Number
etc.
The account number field is not always consistently the same thing though. For accounts of type A they are eight digits long and for accounts of type B they are twelve.
After the search if they select a record and choose to continue the application I need to check the eigit digit account number for any access restrictions. All accounts of type A and B have an associated eigit digit account number, it is just that type B are the only ones to have the twelve digit number.
So should I add a redundant hidden field like "Common Account Number" to the search results and just hide it, thus making the heavily used search take slightly longer and making the results grid take up more space in the view state?
Or
Should I call the database when they try to continue the application and translate the Application ID into the eigit digit number so that I can use it to do my access restriction check? This will require one extra call to the database but the translation should be fast as both fields are in the same table and the application ID is a primary key. The continue application button will be used less as there are many other command options.
I want to update database using entity framework by passing class object in one go with setting without setting object values again.
I have added data using following code
[code]....
here obj is class object which i have passed to the AddTotblTables() method
similary i want to update table in same manner by passing class object.
I have an entity generated from my database that contains one table. When i make changes in the DB i obviously would like these changes to reflected in my model.
My current approach is to delete the item from the designer and then right-click - update model from database. This works for me at the moment. Is there a different approach to refreshing these entity tables ?
How can I update an existing LINQ entity? This code gives me: "Cannot insert an entity that already exists."
Any better practises on updating/inserting with linq?
foreach (ListViewItem lvi in lvStudents.Items)
{
HiddenField hfStudentID = lvi.FindControl("hfID") as HiddenField;
CheckBox cbPresent = lvi.FindControl("mycb") as CheckBox;
int sInt = Int32.Parse(hfStudentID.Value);
dc = new DataClassesSODataContext();//I renewed the dc to make sure that wasn't the problem?
var currStudent = dc.students.Single(x => x.studentID == sInt);
grade g = dc.grades.Single(x => x.subjectID == subjID || x.studentID == sInt);
if (g == null)
{
g = new grade();
g.subject = dc.subjects.Single(x => x.subjectID == subjID);
g.student = currStudent;
g.present = cbPresent.Checked;
dc.grades.InsertOnSubmit(g);
} else
{
g.present = cbPresent.Checked;
dc.grades.Attach(g, true);//I tried both attaching and inserting
}
}
dc.SubmitChanges();
I have a few entities I'd like to update at the same time. However I'd like to write individual update methods in each classes partial class file, for each entity and call them all at the same time. For example:
public sub UpdateEntity1()
...
end sub
public sub UpdateEntity2()
...
end sub
public sub UpdateEntity3()
...
end sub
public sub UpdateAll()
UpdateEntity1()
UpdateEntity2()
UpdateEntity3()
end sub
My question is how do I manage the object context? do I create one object context in the class I'm calling UpdateAll(), then pass it as a parameter to each individual update method? Or do I create a new context for each Update? I'd like to use the same context because the object are related, and this would decrease the db calls to update all the records.
I want to calculate average time to cover a duration of a route.
A route can have multiple trip between different time slots.
trip have TripStartTime and TripEndTime.
For more clear of the Qns for Qns please go to this URL and for table structure please go to this Url.
Trip Time = TripEndTime - TripStartTime from columnin the table.
I have to calculate Actual trips time for different time slots group by Fleet Id which is related to route no in another table..
Quite a common use case, it seems, is when re-populating an object from a form is to go
myobj.Name = "textbox value";
myobj.Content = "textbox content";
But, name may not have changed, it may only be a change to the content textbox.
The problem is that entity framework treats Name as changed just because I've set it's value, regardless of whether I've set exactly the same value or not.
Ideally, I would like EF to only mark things as changed if they genuinely have changed.
I'm pulling all the objects from an entity in my database
Dim dbConfig as New housingEntities
Dim update_query = (From p in dbConfig.Configs _
Select p)
Then, I want to individually access the rows and perform updates to them...For example, if I just needed the first row I could go like this:
update_query.First.timeValue = txtFRRSD.Text
dbConfig.SubmitChanges()
Now, I don't know how to code this, but here is pseudo what I'd like to do:
update_query.Item("FRRSD").timeValue = txtFRRSD.Text
update_query.Item("FRRCD").timeValue = txtFRRCD.Text
update_query.Item("SORSD").timeValue = txtSORSD.Text
update_query.Item("SORCD").timeValue = txtSORCD.Text
dbConfig.SubmitChanges()
Does anyone know a way to do this or something like this?
I recently encountered an annoying problem, and was wondering how to get around it:
I had three tables in my .edmx designer. Two of the tables, A and B, had a 1:many relationship (A:B). The third table, C, had no relationship defined, because I forgot. I added a new many:many relationship from B:C at the database level. I then right clicked and updated my Entity model, and attempted to compile, encountering a 3034 exception:
Problem in Mapping Fragments starting at lines 177, 192:
How should I solve simulation update, when one user updates already updated entery by another user?
First user request 'Category' entityobject, second user does the same. Second user updates this object and first user updates. I have field timestamp field in database that wa set to Concurrency Mode - Fixed.
This is how I update:
[Code]....
Exception never jumps...How should I handle this?
How do I use a stored procedure to change one or more (but not all) fields of a entity in EF4? I have a stored procedure "ChangePassword" taking a username and and a password as parameters and a User entity containing properties for Username and Password as well as other properties. I want to be able to use this stored procedure from a function to update the password from a function in one of my repositories. How to do this?
View 4 RepliesI use ADO.net Entity Data model for work with database.
In my program, I want to update a record of user table, so I use the code below to do this.
In this function I send changed user info and then overwrite the information with the current user information.
After I run objUser = _user; and then call objContext.SaveChanges(); to save the changes.
But when I do this, the changes are not persisted to the database. I use this code for another programs but in this case the code does not work!
public void Update(tbLiUser _user)
{
LinkContext objContext = this.Context;
tbLiUser objUser = objContext.tbLiUsers.First(u => u.tluId == _user.tluId);
objContext.Attach(objUser);
objUser = _user;
objContext.SaveChanges();
}
I'm using Entity data model to reflect my database and I generate Domain service from my Entity data model.I understand that if I have changes in my database, I can just choose "Update Model from Database", but there is no "Update Domain service from Model" option available.How should maintain my domain service? I'm not going to delete away it and regenerate it whenever there are some changes, right?
View 1 RepliesI have read some articles about the new enitity framework and I think it looks very cool from a development perspective.
considering a production environment loaded with data. How does one apply changes to the model? You cannot regenerate the model and in most large organizations, database changes are executed by DBS's and not developers. In such situaitons, it is the role of the developer to develop delta-scripts that the dba can execute.
My experiense with Hibernate (Java) and the like is that you have to pay double when using such frameworks.