MVC :: How To Update A Changed Foreign Key In 3.5
Jul 24, 2010
I am trying to build the MVC Music Store from ASP.Net, my only problem is that the tutorial is made for asp.net 4.0 C# and mvc2 an i am creating it with asp.net 3.5 VB mvc 1. For now i found out a lot of thing wich will work much better in the new frameworks, but my webhost still doesnt support it, because they have some problemms with PLESK.
Now i have a problem i cant figure out, i cant update data from a dropdown list, in the database using the updatemodel, that are foreign keys. Just all other data wich are not foreign keys and primary keys are updateable. These are automaticly created in the sql entity model.
Here is my code.
[code]....
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Similar Messages:
Dec 24, 2010
I have two tables one named article and the other article_type, where the articles table have a foreign key column that references the article_type primary table named "article_status". so i change the name of the article_status foreign key to be article_status_id, but now each time i tried to delete an article type column it raised an error said the the article_status column cannot be found , although i did not mentioned that column in my code here is the full error :-
System.Data.SqlClient.SqlException was unhandled by user code
Message=Invalid column name 'Article_status'.
Source=.Net SqlClient Data Provider
ErrorCode=-2146232060
LineNumber=1
Number=207
Procedure=""
Server=\.pipeE97065CB-CF67-4B sqlquery
State=1
StackTrace:
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Common.DbCommand.ExecuteReader()
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.CompiledQuery.Execute(IProvider provider, Object[] arguments)
at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.ExecuteKeyQuery(Object[] keyValues)
at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.Execute(Object instance)
at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.DeferredSource.GetEnumerator()
at System.Data.Linq.EntitySet`1.Load()
at System.Data.Linq.EntitySet`1.get_Count()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at System.Data.Linq.Table`1.DeleteAllOnSubmit[TSubEntity](IEnumerable`1 entities)
at ProfessionalNetworkWebApplication.Models.ProfessionalNetworkRepository.Delete(Article_Type article) in C:UsersUserdocumentsvisual studio 2010ProjectsProfessionalNetworkWebApplicationProfessionalNetworkWebApplicationModelsProfessionalNetworkRepository.cs:line
35
at ProfessionalNetworkWebApplication.Controllers.ArticleTypeController.Delete(Int32 id, String confirmButton) in C:UsersUserdocumentsvisual studio 2010ProjectsProfessionalNetworkWebApplicationProfessionalNetworkWebApplicationControllersArticleTypeController.cs:line
73
at lambda_method(Closure , ControllerBase , Object[] )
at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassd.<InvokeActionMethodWithFilters>b__a()
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)
InnerException:
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Jul 17, 2010
I have tables two tables, the "book" and the "author", a book can have many authors and vice versa, so there is an intermediate table called "book_author" with two columns as foreign key for those two primary keys
book_author
book_id
author_id
I'm trying to edit the book details and also its author using the entity date model, The controller class method
[Code]....
The HTML edit form
[Code]....
I can only update the book table, but not author that the book has or the book_author, I'm new to asp.net, I can't easily find a tutorial on this issue, I think the logic is to delete the author of the book first and then add the author for that book, but I don't know exactly about that linq and C# code. Can show me? I can only update the book table, but not author that the book has or the book_author, I'm new to asp.net, I can't easily find a tutorial on this issue, I think the logic is to delete the author of the book first and then add the author for that book, but I don't know exactly about that linq and C# code.
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Jan 8, 2011
The UPDATE statement conflicted with the FOREIGN KEY constraint "FK__Software__Packag__5165187F". The conflict occurred in database "StudentDB", table "dbo.Package", column 'PackageID'. The statement has been terminated.
what i try to do is run this;
[code]....
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Sep 13, 2010
1 - Is it necessary to have foreign key to obtain a Relation in Entity Framework between each entity.?
2 - I have a Language Table and many many table with a foreign key related to the language table. Is it right to add this foreign key or I should do something else ?
Ex:
Language
LangID
LangName
TableTextA
TblAID
TextInfo
LangID
TableTextB
TblBID
TextInfo
LangID
TableTextC
TblCID
TextInfo
LangID
etc ...
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Oct 28, 2010
I've got a working update panel which works fine when updating a label control, but I can't get it to work with an updated image (initial image loads fine - the problem is with the update). I think the problem maybe that the image name and location don't change, only the physical file. In other words, I've loaded the page, then updated the image (same name and location), but the image does not update with the label? Here's my code:
[Code]....
And the code behind:
[Code]....
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May 24, 2010
I am using untyped database bind to gridview in an edit form. Now user makes some changes to that datatable (update, delete, insert). How do I detect which rows he changes and which rows he deleted (so I drop them from DB). I know it can be done easily via table adapters but I am supporting a previously built app using untyped datatables/datasets.
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Feb 1, 2010
I've got a GridView in which all rows are set to Edit by default.
I want to be able to save the rows only where changes have been made. At present, my code will only update the first row from my GridView to my database. I've had a look on the internet, and think that the Getchanges might be able to help me, but I'm struggling to work our how exactly to implement it in my scenario.
[Code]....
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Mar 4, 2010
Existing records can be updatedNew records can be insertedAll existing records can be deleted & new ones can be insertedExisting records have a primary key field
New ones are just blank inserts
All this detail is stored in a data table. On form update I only want to update existing (only modified rows) & insert new rows. I have gone about loading the changed records in a new data table
DataTable changedRecordsTable = dataTable_old.GetChanges();
How do I compare it with all the records in the old datatable and pass them to the save query ?
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Oct 6, 2010
I'm trying to do a similar thing -- I have a long form and in part of it, I have an updatepanel.
Inside the updatepanel I have:5 dropdowns (using the CascadingDropdown functionality)One AddProduct ButtonGrid or Repeater (haven't set it up yet)
I want the following to happen:I have the AddProduct Button disabled initially, but I want it to be enabled once the 5th dropdown is selected (so OnSelectedIndexChanged).If they click the AddProduct button, I want it to populate a Grid or Repeater.So far I am just trying to show what the selection was in a label... but nothing happens. I have an OnSelectedIndexChanged function for the last dropdown, so it enables the button, but that doesn't appear to get called. Previously, before disabling the button, I tried updating the label on button click -- and nothing there either.
It just seems like, because they are in the updatepanel, those callbacks never happen. I also do have UpdateMode = Conditional and I have both items in the triggers list.
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Jun 14, 2010
I have a gridview where I am opening a popup page when user selects a row. If I am not using update panel then Select button is able to open popup page.
If I am adding Update panel, the popup page is unable to open. What could be the cause?
[Code]....
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Jul 17, 2015
How do i change the name column text the current row when the selected index of drop down is changed? ex:first row is mudassar khan and belgium, when i change belgium i want mudassar to be replaced to a name which i fetch from database....
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Jan 13, 2010
After some code change I have published my AJAXised web application to the server and the application failes to work properly - something weird is going on, as all .aspx pages are displayed as an ASPX markup text (page declaration, html controls, etc.), rather than a page is being rendered as an html. I have not changed the webconfig, only changed my pages' content/code behind.
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Sep 14, 2010
For our ASP.NET project for school we had to build a sport event management web application.
We provide the application in three languages (English, Dutch & French) which you can switch all the time. This has worked all the time for all users, well that's what we think anyway.
Yesterday I found out that switching from one to another language isn't working for 2 of our users. So I started testing a bit and I always got this error.
I'll try to explain what happens behind the doors when changing the language:
First of all the current language is saved in a session so we don't have to check the user row every time a page loads. Besides that we save the language in the users row in the database.
Users Table:
Id int
Unchecked
Email varchar(150)
Unchecked
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Mar 22, 2011
I had table had data about product photos and this table had a relation to product table and product may be has more than Image. I did my code well to get all images for product by productID query string but only first image retrieved. Note that ProductID in handler page is a foreign key into the Photobank images table, also I note that productID had value of ID table didnot the productID:
stored proc:
ALTER proc [dbo].[SP_GetPhotoBank]
(
@ProductID Int
)
as
[Code].....
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Jan 8, 2011
Lets say there's a table Table1 with Primary key as "MainID" and this MainID is being used as a Foreign key in many tables.
Now when I try and delete a record from Table1 who's MainID as foreign key is being used in some child tables, then it throws this exception that "Foreign key conflict n stuff"..
Now I want to design my Delete Strored procedure in such a way that first of all checks ALL the child t ables that have that foreign key column "MainID" and if MainID from Table1 is being used in any of the child tables it should return 0 . Based on this 0 value I want an alert box to show that will say "Still in use or watever" and wont let the user delete that record unless ALL the records in child tables have been deleted that were using that mainID from table1.
I can't use ON DELETE CASCADE. I want the user to delete child table records manually one by one. Only after child table records using the MainID have been deleted that the user can delete record from Table1
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Jun 22, 2010
I've got 2 tables where each has a primary key which is also the identifier (Both fields called "id" in each table) In the "picture" table as one of the fields I've got the photoalbumid (The id of the "photoalbum" table). This field is just an int field. I'm getting the following error: "Cannot insert explicit value for identity column in table 'Picture' when IDENTITY_INSERT is set to OFF" Can anyone give me some advise? It's such a basic thing I would hope that there's just something small in the creation of the database that I've missed out. Let me know if you need more info.
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Oct 5, 2010
I've two table
a). Country
1.CountryId -PK
2. Country Name
b)City
1.CityId---PK
2.CityName
3.CountryId --FK to Country table
and my code is FWUDataContextDataContext CityContext = new FWUDataContextDataContext();
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Feb 17, 2011
I have the following code
Customer currentCustomer = new Customer();
when i do currentCustomer. In the drop down I can see all the columns listed except one column which is a foriegn key from order table , how do i insert into intorder_fk
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Sep 10, 2010
In my databse i have a databse tables
UserRole -UserID,UserName,RoleName.
Compaign - CompaignId,Region,CompaignName,LOB.
Employee -EmpNo,EmpName,CompignId
Timesheet -TimeId,EmpNo,Date.
I dont have primary key for Compaign Table CompaignId is Identity column. Now i want to use CompaignId in Employee Table because based on compaign user will retrieve employee data in Front end. Again Employee table doesn't have primary key. I am uploading excel file data to databse but in excel file there is no empNo so i cannot use primaryKey i have EmpName in excel file. How to solve this issue. How to use master table if possible create table structure for my requirements.
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Nov 16, 2010
So I am working with a database and am trying to get my model code working.I have a situation where I have a table called accounts that for simplicity has 3 columns
accountid, accounttype, parentid
basically its a parent child relationship. if parentid is null its a parent, its not its a child of the accountid.Im running into problems getting the .edmx file mapping. parentid is a foriegn key on the table.
how can access the parentid column? i can see it in account navigation account1 but Im not sure how to get access to it in my linq query
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Jun 17, 2010
As i start to work with MVC simple things are not so simple. I have a view that renders correctly a single table of my Database (using Entitry framework created automatically by visual from my SQL database).The table show everything including the foreign key and i i seeking for replacing the foreign key by a friendly name of my foreign table.In the controleur i have the following code :
public
ActionResult Index()"Equipement"]
= new
SelectList(_entities.T_E_EQUIPEMENTS_RESEAU_EQP.ToList(),
"EQP_ID",
"EQP_NOM");
return View(_entities.T_E_CONSOMMATEURS_CSO.ToList());
both table are joined by the foreign key CSO_EQP_ID and the primary key EQP_IDI have no clue of what to define in the view ?Any exemple of this simple need will be welcome.
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Feb 22, 2011
I have an MVC3 with EF4 project. I have a screen for order .Order has 2 id's inside it for Billilng and Shipping AddressID .When I go and create a new order these fields render as single textboxes as Ids'Question is how can I render full address textboxes (addressline1,city,state,zip etc) do I have drop in the html markup for them? In that case while capturing the data back I willl have to go with classic way of retrieving name/value pair and then do insert into address bring back that identity and update the order record...?
Create(int customerID,FormCollection fc){}
So the main question is how can I do ModelBinding with foreign keys?
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Mar 10, 2011
I have two tables, which is table 'A' and table 'B'. Table B contains a foreign key that is referenced to table 'A'. The question now is, could I used an option in my project in visual studio an 'Others specify'? I believed that it's not possible, isn't it?If I have a selection that is bound to a datasource then is it possible to make an option 'Others specify' without adding the specified value to the database, which in turn would not have a unique ID? Table B contains the table A ID PK field, and all values from table A to table B should contain a unique ID.
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Apr 21, 2010
I have a database with the structure
Client
--------------
ClientID -> PK
FistName
LastName
AddressID -> FK to Address.AddressID
and
Address
--------------
AdressID -> PK
City
CityCode
I created an initial set of address so
0 - London - 1000
1 - Paris - 2000
2 - Madrid - 3000
3 - Lisbon - 4000
I'm using Visual Studio 2008 with MVC.
Framwork to use ADO.NET to create the model
My view is:
[Code]....
My model is just: ... Private _dataModel As New just2testDBEntities
[Code]....
When post it retun erro
{"Can not insert the value NULL into column 'City', table 'dbo.Address'; column does not allow nulls. INSERT fails. ... statement terminated."}What I was intended to do is to insert a client and not a client and an address.
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