I have been experimenting with WebMatrix, specifically the ability to connect to and use SQL CE data.
My question is:
When I am creating a new SQL Compact database with several tables, how do I define relationships between the tables?
The "Relationships" button in WebMatrix is always greyed out. Is that because it is still in Beta? Or am I missing something?
Does anyone no of any good resources regarding many-to-many relationships? More specifically on displaying data from many-to-many tables in ASP. Struggling to find anything but I may just be over complicating things!
View 18 RepliesSo I am working on an MVC project to put to work the studying I have been doing. I am wrestling with the concept of Database Table relationships and foreign keys. I am working on a simple ecommerce site (displays products, shopping cart, user accounts..etc).
I have the following tables to start out with:
1) Products
2) Categories
I setup the Products and Categories tables to have a ProductId and CategoryId respectively. In my MySQL db, I created a FK on the Products Table to relate to the CategoryId field on the Categories table (I am not sure this was correct to begin).
My expectations for the way the database would handle the table relationship: I didn't want the DB to do anything with the products table if I deleted a category out of the Categories table, or vise versa. The only thing would be that the category field in a Product would be blank (or default) if their category was removed.
Finally, do I have to do anything in my entity classes such as in the Products class, add the ProductId to the Category.ProductId?
Eventually, when I Orders and Users to the project, I can see a relationship where each user -> many orders -> each order has many products -> and each product is in one category.
But I am having a hard time understanding how or if I should be setting up a Foreign key relationship in the two current tables of Products and Categories and if so how to setup my entity class in relation to that FK.
I'm a newbie to this so bear with me. From what I've read online LINQ to Entity should see the relationships without having to specify the joins between multiple tables. I have a relationship that goes across 4 tables Employee, EmployeeDepartmentLink, EmployeeProjectLink, and Project. The idea is an employee can be in multiple departments and work on multiple projects with it being specified which department the employee is in for that project.
This is a C# MVC3 program connecting to a SQL database using VS 2010 Express.
I have no problem with running this query to find employees on a project:
[Code]....
Tring to do the reverse, finding projects that an employee worked on results in an error:
[Code]....
Error message: The specified type member 'EmployeeDepartmentLinks' is not supported in LINQ to Entities. Only initializers, entity members, and entity navigation properties are supported. So I have 2 questions,
1) Why would it work in one direction and not the other? I've played around with it for a couple days with the same results.
2) Does it matter that my primary key and foreign keys are not named the same since all the relationships are connected in SQL? Ex: in Employee (EmployeePK)--(EmployeeFK) in EmployeeDepartmentLink Trying different stuff in LINQPad I was able to get the 2nd query to work if I specified all the joins which I thought was not neccesary with LINQ to Entity. I converted an SQL query that I made on the server into a LINQ query below which works.
I have a table that contains item data. If the item is a particular type further information exists to describe the item. The additional information isn't that heavy however the number of records in relation to the main file will be quite small (less than
5%).
So I have 2 scenarios:1) Put the additional data in the main table and take tha hit on storage
2) Create an additional table and link the 2 together
If we were talking huge amounts of data I can understand that 2) would be the obvious choice but given the simplicity should 1) be a consideration?
If 2) is the answer - is it possible to create a dependency between the 2 tables when the item is 'that' particular type. In other words wnsure the addition data is populated for the required items and not others.
I've found a Webmatrix help article that says MS Webmatrix "publishes the (SQL Server or MySQL) database by creating scripts that run in a database that has been created for you by your hosting provider." That is wonderful, except I can't get it to work when I'm trying to publish a MySQL database (backing wordpress) through FTP (my hosting provider does not support 'web deploy'). Again, no problem, since it is already documented that " FTP protocols cannot be used to publish MySQL database. " But this does not excuse Webmatrix from generating MySQL database install scripts for me. During the publishing step, no database install script is generated - at least that I can tell - and there is no manual option to create a database export / backup / install script.
In short, as Webmatrix goes, I'm dead in the water trying to get my database uploaded to my hosting provider. Does anyone know the trick to force Webmatrix to create the MySQL database install scripts on my local box? Once created, I can take-over the upload and install process.
I'm wondering if it is possible to include Microsoft.Data.Entity.CTP.dll reference to WebMatrix site and if the Compact edition of the database would support it? I'd kinda love use something like
code-first development in my WebMatrix project. I think is even easier than writing SQL-s into the code...
I started the Bakery site demo...everything runs fine on my local machine.When I publish the site to production server in w2k8r2+iis7.5 and with .net 4.0 (integrate) pool, my bakery apps not able to connect to the .sdf file.
Error I got is :
Connection string "bakery" was not found. Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidOperationException: Connection string "bakery" was not found.
Source Error:
Line 2: Layout = "_SiteLayout.cshtml";
Line 3:
Line 4: FacebookSocialPlugins.Initialize("[xxx]", "[xxx]","bakery");
Line 5:
Line 6: }
Stack Trace:
[InvalidOperationException: Connection string "bakery" was not found.]
WebMatrix.Data.Database.OpenNamedConnection(String name, IConfigurationManager configurationManager) +132
WebMatrix.Data.Database.Open(String name) +42
System.Web.WebPages.DatabaseConnectionInfo.Connect() +43
System.Web.WebPages.SimpleMembershipProvider.CreateTablesIfNeeded() +42
System.Web.WebPages.WebSecurity.InitializeMembershipProvider(SimpleMembershipProvider sMembership, DatabaseConnectionInfo connect, String userTableName, String userIdColumn, String userNameColumn, Boolean createTables) +70
System.Web.WebPages.WebSecurity.InitializeProviders(DatabaseConnectionInfo connect, String userTableName, String userIdColumn, String userNameColumn, Boolean autoCreateTables) +51
System.Web.WebPages.WebSecurity.InitializeDatabaseConnection(String connectionStringName, String userTableName, String userIdColumn, String userNameColumn, Boolean autoCreateTables) +52
FacebookSocialPlugins.InitializeMembershipProviderIfNeeded() +54
FacebookSocialPlugins.Initialize(String appId, String appSecret, String membershipDbName) +171
ASP._PageStart_cshtml.Execute() in d:xxxakery\_PageStart.cshtml:4
System.Web.WebPages.StartPage.ExecutePageHierarchy() +15
System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +33
System.Web.WebPages.WebPageHttpHandler.ProcessRequestInternal(HttpContext context) +207
I know we can use the HTML helpers, but how about the strongly typed one's?
Html.LabelFor()
I struggle with publishing 2 databases from WebMatrix using WebDeploy. On Publish settings screen I specify 2 different connection strings, but on Publish Compatibility screen Database names in both destination connection strings are equal. When I return to settings screen, original value is replaced there as well.
How destination server connection strings are evaluated? Here are connection strings from the root web.config file, which are set by hidden parameters in my parameters.xml:
<connectionStrings>
<add connectionString="Server=(local);Database=xxx;Uid=xxx;Pwd=xxx" name="xxx" providerName="System.Data.SqlClient" />
<add connectionString="Server=(local);Database=xxx2;Uid=xxx;Pwd=xxx" name="xxx" providerName="System.Data.SqlClient" />
</connectionStrings>
If I create two websites using the starter site template logging into one shows me logged into the other.
Here are the steps:
Create starter website called website1 Create starter website called website2 Run both websites in the same browser, firefox Register an account in website1 Log out of website1 Log back into website1 Refresh website2 and it shows my login name from website1 Has anyone else encountered this?
I downloaded WebMatrix thinking I could create a local Intranet page and simply host it from my server. Can I do this with WebMatrix? If so how?
View 1 RepliesI'm often experiencing that keyboard shortcuts stops working in WebMatrix. This is very annoying as CTRL-S, CTRL-C, CTRL-V, etc. stops working, all of which are heavily used when programming. It's obviously hard to explain how to reproduce this, but I waswondering if someone knows a quick-fix?
View 12 RepliesThere I was, happily coding webpages, when suddenly it wouldn't run them anymore. Now when I click run I get an error message that looks like this: Server Error in '/' Application.This type of page is not served. Description:The type of page you have requested is not served because it has been explicitly forbidden. The extension '.cshtml' may be incorrect. Please review the URL below and make sure that it is spelled correctly.
Requested URL: /quiz/intro.cshtml
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1
My hosting company states they support .net and razor. However after uploading my website made with webmatrix and razor *.cshtml pages. When i visit my website all i get is 404.17 error messages. As an testcase i decided to add an standard .aspx page. Visiting that page gives the same 404.17 error message :-(
.
According to my webhoster my web.config is wrong. However that one is generated by webmatrix. Besides my *.cshtml *.aspx a lot of files and directories are added to the bin folder. What can i check and what should my hosting provider check. When using the check compatibility the asp.net version is shown as unknown? My hosting provider claims my site is running asp.net 4.0 in integrated mode and that should be enough.
It's unfortunate that Microsoft WebMatrix (beta) doesn't recognize that files has been modified. I suggest you implement a feature similar to Visual Studio, allowing the user to decide what to do if the file has been modified outside WebMatrix. Especially when you have a button to launch the project in Visual Studio, it should have better support for "dual-development", cause at it is now, code can be overwritten by mistake easily.
View 3 RepliesI got the first beta of WebMatrix, downloaded Drupal, and got a site more or less going. I then tried to move it to two different hosts - first the IIS server running on my own domain controller, then to my hosting service. I dumped the DB with mysqldump, and imported it to the databases running on each server. Then I ftp'd the code and configuration files to both servers, and made appropriate configuration changes (primarily the mysql connect string).On both servers I have the same problem: The site comes up in its home page and looks great, but as soon as I log in as the site admin, I get a 404 (not found) error. Since it looks like virtually everything in Drupal is driven from the database, I really haven't the faintest idea where to start debugging this.
View 3 RepliesThat subject may not do this questions justice.
I am trying to limit what I write on all my .cshtml pages. For example, on everypage I am @using myDLL and "connecting" to sql server.
I write that out like
@using System.myDLL;
@{
myDLL dll = new myDLL();
dll.ConnectionString = "blablabla";
}
How can I remove the need to do that to every single page? I think I can create a web.config and do some funky stuff... can someone show examples?
I am having all sorts of trouble with webmatrix hanging on me and was wondering if someone could test the following to see if it is isolated to me?
If I create a new empty site and add a single php page to it and then try to type the following line webmatrix will hand as soon as I get to the ? after src="
[Code]....
right now I playing around with WebMatrix and I followed the tutorial from http://www.asp.net/WebMatrix. Chapter 6 (displaying data in a grid) described how to use a WebGrid helper very clear, but the data in the example is always retrieved from an SQL DB.I want to use the same XML file from chapter 7 (Displaying data in a chart).Using the code:
...
var DataSet = new DataSet();
dataSet.ReadXmlSchema(Server.MapPath("/App_Data/QCFiler.xsd"));
[code]...
I am trying to publish a sugarcrm site I created in webmatrix to my site hosted on godaddy, however when i go into the publish settings and enter the server info, passwords etc., I can only get the connection to validate for the FTP protocol setting. When i click the button to test and validate the connection for webdeploy instead of ftp, it tries then says connection timed out. How do I get this to work so that I can publish my site on godaddy?
View 3 RepliesWhat is the best approach to one to many relationships?
This is my scenario:
I have a simple one to many relation:
Customer
CustomerID
Name
tel
CustomerNotes
Id
Note
customerID
I want to have a DETAIL view of customers and CREATE view for CustomerNotes all in the same page.
I create CustomerController and the different views and its respective actions for edit, create, delete, etc.
I also create a CustomerNotesController and the views and actions like before, but I made the views PARTIALS
I put a RENDERPARTIAL for the CustomerNotes create view in the Details view from Customer.
When I run the app, the page is render as expected: It shows the detail info of the customer and bellow the create form for the notes. However, when I click SAVE, nothing happens. I put a breakpoint in the notes controller and never get hit.
I also try with RenderAction and don't work at all.
I'm having a hard time wrapping my head around how to use the Memberships in MVC. I know there is the built in ASPNETDB database which has all the basic tables for users and such. But what if I wanted to add a relationship between one of my custom tables and this built in user table?
If I had a database table that contained blog comments, we'll call it Comment. And each Comment had a userID associated with it could I do something like?
User.Comments.Add(someCommentObj)
how to create C# classes to represent one to many relationships in C#. I have a Customer and an Address table in my database. I also have a Customer class in my C# solution but how do I introduce the multiple address element? Do I have a separate Address class? Do I create a subclass in the Customer class or create a method in Customer called GetAddresses of type List which contains all of the relevant logic? In my code I need to be able to return a customer with all associated addresses and I just cannot picture the best way to achieve this using OOP.
View 9 RepliesEF is so frustrating. I can't seem to be able to get my head around what I need to do so I can delete an object. I seem to be able to remove the object but not the related child objects. Can anyone tell me what is the rule of thumb when you want to delete all related child objects of a given object? I've tried loading all related objects like this:
Entry entry = ModelContext.GetObjectByKey(new EntityKey("ModelContainer.EntrySet", "Id", id)) as Entry;
entry.ChildEnteries.Load();
if (entry != null)
{
ModelContext.DeleteObject(entry);
ModelContext.SaveChanges();
}
I get errors related to the relationships: A relationship is being added or deleted from an AssociationSet 'EntryEntry'. With cardinality constraints, a corresponding 'Entry1' must also be added or deleted. Why can't I just load the object using modelcontext.GetObjectByKey and remove it along with its child objects? My other question is can I delete an object using Entity command like so? DELETE e from objectset as e where e.id = 1 I've tried few variations and all of them throw exceptions.
