MVC :: ModelBinding With Foreign Keys?
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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Feb 28, 2011
I am using Access 2003 Database and I need to retrieve list of a table's foreign keys and tables they are related to in C#. I used GetSchema() function of OleDbConnection as well as OdbcConnection classes. But It just returns the name of key among few other details.
OdbcConnection con = new OdbcConnection(conStr);
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Mar 22, 2011
I am developing asp.net MVC3 application and I have following entity
This entity has composite key (CreditRegistryId and Accoubnt No are primary keys). CreditRegistryId is a foreign key as well. How can I make composite key and foreign key. I am using DbContext API from EF 4.1. I am not using edmx ( ORM designer)
[code]...
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Nov 10, 2010
I have an EF model with a table with several foreign keys. These foreign keys are managed by associations. In code, I can get a strongly typed list of objects when I access that property on the object.
When I generate a strongly typed view, all I see are the int fields. Is there a way to get ASP.NET MVC to bind to the objects that are related as well as the main object?
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Nov 7, 2010
I just came across some code that seems to encrypt database keys prior to sending them to the client (WebBrowser, Silverlight, etc).
To illustrate, suppose you have a list of students to extra-curricular activities, and a relationship defined between them. Every time the data is written out to the ASPX page, the studentID and activityID is encrypted. Every time a write, or modify is made, this value is sent back to the server, decrypted, and saved to the database.
What could be the reasons to expose data this way? Is this a normal practice?
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Mar 21, 2011
I am having trouble with foreign keys Dynamic Data and entity framework 4.0. It feels like there is a problem with the entity association but I am not sure. I have multiple fields representing the foreign key on the insert page.
When I try and insert data I get an error A dependent property in a ReferentialConstraint is mapped to a store-generated column.
Column: 'CommentId'
My data is a very basic one to many relationship, the foreign key in question is BookId in the Comment Table.
[code]...
When I let the scaffolding do its thing, I get multiple fields representing the foreign key.
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Jan 3, 2011
how to handle foreign keys with Entity Framework, when editing or adding a new record. For example, I have a person table, which has a timezone_id linking to my timezone table.
But the model seems to not include timezone_id. I see it's a new way of doing things, but ... how do I store my record?
My method:
[code]...
I can't do u.timezone_id = timezoneid;
I only have u.timezone (which seems to be the actual entity), and u.timezoneReference, which I am not sure what to do with.
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May 23, 2010
What is the difference, if any, between letting the framework do the modelbinding to a parameter:
[Code]....
vs. invoking the modelbindng manually/explicitly in the action method:
[Code]....
Is there any difference(s)? E.g., does the framework use the parameter name (m) during the modelbinding in the former method in some way that it might not do in the latter way?
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Nov 4, 2010
I have the following tables in my database which are as given under:
[code]...
My requirement is instead of getting the PromotionID values displayed for columns CustomerPromotionDiscountID & EmployeePromotionDiscountID, it should display the respective DiscountAmount. Which is not happenning for some reason.
I somehow found a workaround where if i define the datatype for columns CustomerPromotionDiscountID and EmployeePromotionDiscountID as nchar or nvarchar, it displays the DiscountAmount.
Wanted to know if there is any better way of doing this without changing the datatype for my columns?
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Dec 15, 2010
i'll make a simple website. in my website i have two kind of products to sell
1. Projects
2. Documents
These Tables are available in my database :
[code]...
now i will make an order table. should i make differentt order table?
or i could save order information of both tables in one table?
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Apr 20, 2010
If i create all of the foreign keys in my sql database and I create a linq to sql item in my project the linqs show on the diagram.
Does this mean that i dont need to create joins in my linq query in my c# code? so i mean my quesry would look something like this
[Code]....
instead of
[Code]....
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Feb 11, 2010
I have the code below:
SqlConnection sqlConnection = new SqlConnection(selectedConnStr);
sqlConnection.Open();
SqlCommand sqlCommand = new SqlCommand("SELECT * FROM " + tableName, sqlConnection);
schema = sqlCommand.ExecuteReader(CommandBehavior.CloseConnection).GetSchemaTable();
Just want to know how can I get the foreign keys from schema?
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Feb 26, 2011
I use Mysql database, in this i create two table A, B. table A column x and is FK of second table B's column m,n,o provide does it possible that x referncing to foreign key of table B columns m, n , and o all.
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Apr 6, 2010
Adding data into kartlar table (RehberID,KampanyaID,BrimID) is ok. But which Kart'ID created? I need to learn which Id created after adding data (RehberID,KampanyaID,BrimID) into Kartlar?
[code]...
How can I do that? I want to get data from Kartlar which data I added?
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Jul 9, 2010
Am trying to get a working enity model with foreign keys working but have run into a problem. I have imported 3 tables with content and some data.Lets call these tables geo_countries, geo_counties, geo_municipalities and the FK are:1. geo_county have a column country_id wich corresponds to country_id in geo_country 2. geo_municipality have a column county_id wich correspond to the county_id in geo_county.The problem i have is when i try to get correspondig child items with the following code i run into trouble:
[Code]....
The problem above is that 'test' generates results but not 'test2', wich never return anything. Am i not supposed to be able to do it like i do in 'test2'? I earlier tried to add a child object by replacing ToList() with Add() and that worked. But i cant seem to get anything out of it.
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Feb 8, 2010
I have a DataGrid that I need to be able to use to delete records form a file
[Code]....
[Code]....
I use
((TextBox)GridMenuOptions.Rows[e.RowIndex].Cells[1].Controls[0]).Text;
To access the data in the Grid for updating, but it doesn't work for deleting
I can use
string id = GridMenuOptions.DataKeys[e.RowIndex].Value.ToString();
but that only returns the first key.
How do I access the rest of the keys?
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Dec 7, 2010
My current project has many peripheral systems and many different environments (testing, integration, development etc). As expected, we're using .config files to dynamically manage everything.
Instead of updating each relavant key when deploying to an environment, I was hoping there was a way to change 1 key only. Such as:
<add key="Environment" value="Development"/>
<add key="WebServiceLocation" value="http://<<Environment>>/text.asmx"/>
I've done some searching and haven't come up with an elegant solution. I'm aware that .config files can make use of system variables, but this seems like a bit of a high wire act.
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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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Feb 3, 2010
I got a ActionResult method that returns a View that it populates with a class object.
On that view I got a submit button and I call another actionresult method that takes the class object as an parameter.
I understand that you have to implement a modelbinder for that class if you need to retain the values.
But i dont understand how it saves the values from previous methods.
For now i put the object in a session object, but i have a book(Pro ASP:NET MVC Framework" from Apress, and in there they say that you dont have to put anything in a session object. But they dont show how else to do it.
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Sep 7, 2010
Does Modelbinding increase performance that much? I have a large table which I have split into 4 details/edit screens, and want to load only information that is needed on the particular screen.
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Jun 16, 2010
I am having a table in which i`m dynamically creating and deleting rows. How can I change the code such that the rows be added and deleted and the model info property filled accordingly.
Bearing in mind that the rows can be dynamically created and deleted, I may have Info[0], Inf0[3], info[4]... My objective is to be able to bind the array even if it`s not in sequence.
Model
[Code]....
Controller
[Code]....
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Jun 15, 2010
I have the following codes and the test value is always null in the controller after the post. What is wrong and how can I correct it?
The values of Color, Size, Clothes are posted with the expected values. Though Data.test contains the values, I`m having Object {test=}, in firebug and test is null in the controller. why is that so?
[Code]....
[Code]....
[Code]....
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Apr 24, 2010
Perhaps should have posted this with my previous question, but now that I figured the problem, it might be better to create a new one.
My viewmodel is a custom type (say Person) and one of it's members another custom type (say "EmploymentStatus").
I got a list of "EmploymentStatuses" which I convert from IEnumerable<EmploymentStatus> to a SelectList
[Code]....
and I use this list in my View (Strongly typed using PersonModel)
[Code]....
All fine. The problem is that my controller expect a person object and when it does validation, it tell me that the employment status selection are not valid. Obviously because a EmploymentStatus object are expected whereas the View return a SelectListItem.
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Aug 11, 2010
Let's say I have a property and a textbox on a view
[Code]....
I don't understand why each time I use the modelbinding validation like this
[Code]....
I still get the error displayed, But this time only by Html.ValidateSummary(). the textbox is not highlighted anymore and Html.ValidateMessageFor() doesn't display any message at all.
Is there something I should do the solve this problem? It's important because I have many form that user need to fill out. It's important to highlight the textbox to make it obvious to them.
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Mar 29, 2011
Can function keys be used in a Web application? If so, how
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