C# Vs VB And Generally Code Strategy?
Apr 5, 2010
web design has been hobby of mine for many years now but I am new to ASP.NET. My program language of choice is C# even though Im not very skilled in it.Even though I wish to use C# it seems to me that maybe VB would be of better choice because most of the videos from asp.net use VB primarily even though C# code is availible. So really, would it be better to start with VB even though deep down (I dont know why) I wish to learn C#? Also, I'm struggling with how best to learn it. I get confused when watching the videos (even in the fundamentals section) when it comes to code behind writting.
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Mar 4, 2011
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However, the more I delve into ASP.NET (specifically with MVC), the more public properties I see inside of classes (specifically models) such as the ones shown at Scottgu's blog discussing the Entity Framework.
Does it have something to do with the way that LINQ populates a class?
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Jun 22, 2010
I'm trying to secure my web application so XML files it contains can't be downloaded. I thought it would be as simple as adding these to the "httpHandlers" section of web.config:
<remove verb="*" path="*.xml"/>
<add verb="*" path="*.xml" type="System.Web.HttpForbiddenHandler"/>
This failed - the XML files could still be downloaded easily. I tried different browsers in case they were caching, but everything could download the XML files without any trouble. I thought this might be due to some special handling of XML, so I tried mocking up an alternative based on ".txt123" files. I added this file with some dummy content:
[code]....
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Apr 5, 2010
I find my self in a situation where I have to choose between either creating a new sp in database and create the middle layer code. so loose some precious development time. also the procedure is likely to contain some joins.Or use two already existing sp(s), the problem of this approach is that I am doing two round trips to database. which can be poor performance especially if I have database in another server.
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Mar 10, 2010
We have an ASP.Net MVC solution built in VS2008 and TFS2008. We use TFS Build and use Continuous Integration.We have a deployment pipeline that enables us to progress a build, eventually, to our live site...
Internal Dev (immediate deployment following a build)
External Dev (used by internal testers to make sure it works on the production server)
External Test (used by our client to test themselves)
Live (self explanatory).
I have 2 questions relating to thisWhich ones of these should be built in Debug and which in Release?How should I write my TFSBuild.proj files to cope with this strategy?
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Sep 20, 2010
I work in a small developing team with 3 developers and none of us are really 'uber elite programmers' but we get by pretty well for our company. One thing that has been constantly recurring is we keep using the same resources in multiple projects. One example being the fckeditor control, however it stinks to constantly add this folder to every project (I've got the control set-up in my toolbox, but it won't be able to find the code unless you have the folder in there). This also applies with constantly recurring master pages and controls. Now we have made some steps for improving this, including making a 'back end' project where we put our shared functions, and made a CDN for images and scripts. But I still run into issues. For instance all developers must make sure they have the latest version of the back end project checked out, and built. Also when you add a reference to that .dll, the paths have to be the same between developers, otherwise it breaks the reference.
Now I just found out you can add a project reference, which will make the back end project build anytime I build the front-end project, but again you still have to make sure you have the latest version checked out. But I wonder what else I could do? Things I find annoying are making sure the relative locations of the back end project to the front end project has to be the same, and making sure they have the latest version of the back end checked out. Are there better ways to do this?Also the back-end project is a class library, but how can I share resources like a user control? I tried putting a user control in a normal project, and then adding that project as a reference, but it doesn't give you access to the control in the file list like I am used to for dragging into a page.
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Apr 4, 2011
I have a typical scenario that I'm struggling with from a performance standpoint. The user selects a value from a dropdown and clicks a button. A stored procedure takes that value as an input parameter, executes, and returns the results to a grid. For just one of the values ('All'), the query runs for roughly 2.5 minutes. For the rest of the values the query runs less than 1ms.
Obviously, having the user wait for 2.5 minutes just isn't going to fly. So, what are some typical strategies to handle this? Some of my own thoughts:New table that stores the information for the 'All' value and is generated nightlyCache the data on the caching server
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Dec 23, 2010
I am developing a clickonce application that talks to the server via WCF. So far it works fine with a WCF service that uses wsHttpBinding to talk to the server.Here's what works so far: -
1. I have a WCF web site named "TotemWCF" that runs on an SBS 2003 server (=IIS V6).
2. The service.svc for this is
<%@ ServiceHost Language="VB" Debug="true" Service="Service" CodeBehind="~/App_Code/Service.vb" %>
3. There is a contract: IService.vb, containing several contracts like
<OperationContract()> _
Function NTVSearch() As totem.NTViewDataTable[code]......
In initial testing I used this for ALL communication, but it seems to me that it's a bad idea to use streaming for simple "Get a value from the database" communication and it seems to be introducing errors into my program. So my question is: - "What is the best way of managing this, so that Function1 goes via one binding, and Function 2 goes via another binding. Do I create separate services at the level of the web site, the contract, the service, or the function?
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Jan 5, 2011
my current question is tightly related to this one, but is far more specific. We have to plan a design strategy for the objective described in that question. We want to do this by rewriting HTML on ASP.NET web forms. My question is: which strategy is the best according to parameters of feasibility, performance impact and implementation effort on legacy applications.
what I have to do is to basically get the HTML output of a Web Form, parse it, and replace certain URLs according to user-defined rules. In that example, I would rewrite all static content to CDN URLs, but it can be easily extended to URL rewriting techniques. I found lots (and I really mean lots) of articles about URL rewriting from the perspective of having URLs like [URL]interpreted as [URL] but I found none showing me how to smartly format old-style URLs to shorter format right from inside HTML (so the page will render the short-form URL directly) [edit] without deep code intervention.
Strategy 1
Like suggested in an answer of the above question, write an HTTP Module that intercepts the HTML and rewrites it. Actually, I looked around and saw I can set a Response.Filter stream object that performs the HTML filtering.
Pros:
I can inject the HTTP Module on a legacy application, configure rewriting rules via XML and have the oldest CRM/ecommerce application load static content from a CDN without touching its code at all.
Cons:
I suspected that (and a comment here confirms my suspects) having to reimplement a Stream's Write method, which operates on a partial buffer in the general case, can result in bad replacements. Suppose the Write method is first called with a chunk like [URL] (where I assume <img src="h was already written before) and later ge.png" /> (so guess the final URL :-P) with a rewrite rule that regexes [URL][^"]* into [URL] the substitution is not done. To workaround that, I could use a MemoryStream or something like that to buffer the complete set of data and then perform the substitutions, but it could cause troubles on highly loaded servers
Strategy 2
Overriding Page's Render method in a way such as described here
Pros:
doesn't suffer the chunking problem
Cons:
requires defining a base class for all pages. Feasible on new applications, not sure for maintaining legacy applications. Seems has a problem as you cannot instantiate HttpTextWriter directly Obviously, for the new webapps we'll have to develop, I would adopt strategy 2, but I really like using dynamic components a lot, as they can be plugged with ease when application requires them (so if our new app will be installed without a CDN the feature is turned off).
Briefly, my questions are How would you fix both strategies' cons (particularly 1st)? And, of course, do you have other strategies to suggest to achieve this objective?
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Feb 16, 2011
I am about to a client develop a mobile version of their EPiServer site. The mobile version should have different functionality than the regular but some content might be shared so that it won't have be maintained twice.
I'm thinking about using jQuery Mobile as the user interface system to reach as many users as possible with the same solution and possibly 51degrees.mobi for best detection of mobile devices.
Does anyone have any experience in how to do this with EPiServer? How to structure? I'm thinking of using a sub-node (/mobile) that gets hidden on the regular site but I'm not sure it's the best solution.
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Apr 30, 2010
I want to make a User login Form, in which account get lock if number of attempts gets exceed by three.
How can i implement the locking and unlocking strategy in login page?
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Feb 24, 2010
I've been developing a database system that stores test results from two different machines. (It's a foundry, each machine tests for the amounts of a collection of elements in a piece of metal. One machine does the tests on iron, the second on aluminium. Both produce the same list, but each machine will have much more of some elements than others.)
I used folder security to limit who has access to what folders, so there is a general page for anyone to view results from any machine in the root, one folder has a page to allow people in a particular group to edit/correct the iron results, and a second folder has a page to allow another group of people to edit/correct the aluminium results. Now, we've picked up a third machine which tests aluminium samples too, and it belongs to a third group of people. What is the best or recommended method to allow this third group to edit samples from the third machine only?
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2) The other option I see is to keep one aluminium editing page, but to limit the results that are shown to the ones that the current user should be allowed to see. (One page which shows one group of people one half of the results, and shows a second group of people the other half of the results). Is there a way to achieve this that is almost as easy as using folder-based permissions?
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Nov 1, 2010
I have been tasked with implementing a strategy to catch all errors in an ASP.net application which cause a user request or interaction to crash and then e-mailk this exception to a support team in advance of a user calling about the error.Some errors however are not causing the page to crash or be redirected to the custom error page but these are being emailed to the support team instead of simply being loggedMy requirement is to seperate what exception types will cause a page fail and which will not.Example I am currently receiving a System.Web.HttpUnHandledException which is not causing any page to fall over and therefore is not of relevance to the support team. this can be logged but does not require emailing.
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Sep 18, 2010
what is the recommended data access strategy for the following environment: single stored procedure, many parameters, asp.net 4.0, sql server 2008, and the stored proc returns 11 different recordsets, all of which get displayed in various different elements too complex and specific to be handled by server controls.
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Apr 12, 2010
Following is the code to insert userName from session and PageName into table to keep record that how many times a user does hit a particular page.
To avoid repitition of code I want to put the code in one class and want to inherit same code in each page.
How to get this task? Please do share with me? Here is the OK code:
[Code]....
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Jul 30, 2010
I've the Javascript code to do a confirmation before deletion of some records
function confirmDelete()
{
if(confirm('Delete all?'))
{
return true;
}
else
{
return false;
}
}
I've the button code here
<asp:Button ID="btnDelete" runat="server" onClientClick="return confirmDelete();" onClick="btnDelete_click" />
If i've the button outside an update panel (basically i'm using RadAjaxPanel by Telerik) it is working fine. But when the button is inside an ajax panel, even if i click OK for deleting the records the server side code is not called.
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May 1, 2010
I'm missing a the code browser when I create pages that have the code not placed in a seperate file. For pages with .asp.vb files I get the browser correctly.
I think it's called a code browser but just in case it's not I mean the dropdown that shows Page Events, Buttons and other controls that can be selected along with their events.
How do I turn on those dropdowns for pages with code behind that uses <script> tags in the actual .aspx page?
Included (Showing page events just under the tab):
Missing
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Mar 3, 2010
I want to call a function present in code behind from front page (html : source code)
i want to use like this:
Source code
<a href='<%# linkAlpha("B").ToString()) %>' title="B" id="B_List" runat = "server">B</a>
Code Behind
protected string linkAlpha(string value)
{
// /market-research/<%#Eval("customname")%>/
string str = "";
if (Request.Url.DnsSafeHost == "localhost")
{ // /market-reports/<%# Eval("customname")%>/
str = "Alpha_Category.aspx?q=" + value.ToString().Trim();
// Response.Redirect("Alpha_Category.aspx?q=" + value.ToString().Trim());
}
else
{
// str = "/market-reports/" + value.ToString().Trim() + "/";
str = "/Alpha_Category.aspx?q=" + value.ToString().Trim();
}
return str;
}
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May 18, 2010
how do you call code behind button click event or a code behind method
from javascript.
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Apr 16, 2010
Can the select command of a SqlDataSource be given by code in the code behind file. Also by calling the SqlDataSource.Select can the select statement be executed?
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May 25, 2010
I have an asp.net button, that when clicked calls a code behind function. The function does some evaluation, and then I want to call javascript from within this asp.net function.
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Dec 3, 2010
I want to bind an ObjectDataSource to a property in my asp page and I want to do it in the page's aspx code, not in code-behind. I've already done it in code-behind, as follows:
[Code]....
I'd prefer to get rid of the ugly code-behind and just do this in mark-up. Something like
[Code]....
This gives me a run-time error: Cannot create an object of type 'System.Object' from its string representation 'SelectedBook' for the 'DataSource' property.Is there a way of doing this declaratively and not in code-behind? Further, what if what I want is to actually use a child property of the property in question? For example, if my Book object has a ReaderComments collection, can I databind to it decaratively in the aspx mark-up?
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Nov 12, 2010
anyone use/ know of any library or website with code snippets or samples with many of the mundane boilerplate code and/ or functions like data access, data scrubbing, recursive routines...
preferably c# since most of .net in the real world is c#. VB is ok too.
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Jul 1, 2010
I have a number of radio buttons on my page. When one is selected, I wish for certain controls to be made visible/invisible.
Can anyone tell me the property to code in VB behind code?
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Dec 30, 2010
how to generate HTML code from the code behind?
I would like to build a form that generate an html code inside a for loop.
I will let the user enter the photo name and No. of photos
Then I will generate an HTML code like this:
<a href="http://www.mzinj.org/images/gallery/Photo%20(1).jpg" target="_blank"> <img src="http://www.mzinj.org/images/gallery/Photo%20(1).jpg" alt="" width="345" height="247" /> </a> <br /> <a href="http://www.mzinj.org/images/gallery/Photo%20(2).jpg" target="_blank">
<img src="http://www.mzinj.org/images/gallery/Photo%20(2).jpg" alt="" width="345" height="247" /> </a> <br /> <a href="http://www.mzinj.org/images/gallery/Photo%20(3).jpg" target="_blank"> <img src="http://www.mzinj.org/images/gallery/Photo%20(3).jpg" alt=""
width="345" height="247" /> </a> <br />
depending on the No. of the photos the code will be duplicated in the loop
Then I will display the result of the loop in label or in a textarea to let the user copy it any where
The problem is that while compiling my code it considers the HTML code as a part of the behind file and gives errors on the single quote, the double quote and on the parentheses
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