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• Re: ASP.Net Web Application

  What DMBS is this? It should be quite simple to determine if it is indeed being hung up at the DB or if it's something else, such as pegging the IIS process(es).

  Posted to Architecture (Forum) by TAsunder on 6/25/2008

• Re: Performance with 3500 concurrent users

  Of course, if you use querystring to replace state, make sure you are protecting it adequately so that session hijacking and other badness can't occur.

  Posted to Architecture (Forum) by TAsunder on 6/24/2008

• Re: Performance with 3500 concurrent users

  SQL Server Express doesn't have a throttling workload governor like the older MSDE. The issue with performance and high load relates to the memory limitation, processor limitation, and some features that aren't available. If you are doing minimal DB reads and the DB is relatively small, you can maybe get away with SQL Server Express. If you use the DB frequently or it is large, the 1gb limit and single processor limitation could be pretty extreme.

  Posted to Architecture (Forum) by TAsunder on 6/24/2008

• Re: Performance with 3500 concurrent users

  [quote user="anthonypj"] Thanks for the reply Kris, I dont have any direct control over the version SQL Server. Would thi shave a impact on performance. [/quote] Probably. That version of SQL server is optimized for <10 concurrent connections, I believe. It's intended to be an embedded SQL Server instance and not a centralized DB. IMO, the most important thing to consider when developing an application with that many users is scalability. Make sure the app can scale at the hardware

  Posted to Architecture (Forum) by TAsunder on 6/24/2008

• Re: Dilemma with similar goals in one database causing design issues

  So on the auction site, the user has to provide every single attribute that you have for new parts (size, mfr, model, colour, year, etc.)?

  Posted to Architecture (Forum) by TAsunder on 6/20/2008

• Re: Dilemma with similar goals in one database causing design issues

  I don't understand the desire to unify the tables completely. What the user sells need not be related to products sold on other portions of the site. The user might not even know the data elements that are known for for-sale products. It would make sense to have a generic table to track transactions (either auction or sale), but this shouldn't really have a lot of specifics in it, IMO.

  Posted to Architecture (Forum) by TAsunder on 6/19/2008

• Re: Is there real solution to protect from xss,sqlinj and other vulnb.

  There really isn't any one solution. It depends largely on your needs. For most scenarios, keeping RequestValidation on and using white-list validation for all data elements that come from the browser (form fields, hidden inputs, querystring, etc.) is probably best. The white list you use depends entirely on the element you are validating. If it's a numeric, your white list could be just numbers. If it's a name, it gets more complicated. XSS and SQL Injection are the vulnerabilities being

  Posted to Security (Forum) by TAsunder on 6/18/2008

• Re: Custom Entities and data from multiple tables?

  We would normally do this with two queries... one query gets a list of customers with orders (a query on the customers). Another gets a list of orders. The customer list gets put into a dictionary by customer id. Bind the gridview the orders. Then in the item template for the customer name columns, reference the customer dictionary by customer id and then you have the customer object for the given order object. This approach is possible if you have strong query objects on the business objects or

  Posted to Architecture (Forum) by TAsunder on 6/6/2008

• Re: Architecture for data readers?

  [quote user="clarky"]I guess the only reason I can think is because it's still a weakly typed approach. You're making an assumption about what is going to be in the DataReader in the class that uses it within the DAL. Potentially the structure of the DataReader could change within the class which creates it and unless you remember to change the consuming class it will all compile ok but give run time errors. So on that basis I guess strongly typed datasets might be a better way

  Posted to Architecture (Forum) by TAsunder on 6/6/2008

• Re: Exception Handling

  It does so automatically if you don't catch it. An error that occurs in the call stack keeps bubbling up to the top if nothing catches it. If you are in your Data layer and an exception occurs and is not caught, it will exit the function and go up to the calling function, and repeat this until it gets all the way to the UI. If the UI doesn't catch it it goes to the global.asax.vb where if uncaught it just shows whatever default error page you have.

  Posted to Architecture (Forum) by TAsunder on 6/6/2008