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How to block the ASP.NET page while ajax UpdateProgress is being displayed.

Step 1: Copy the following styles to your aspx page. <style type="text/css"> .hide { display: none; } .show { display: inherit; } .progressBackgroundFilter { position: absolute; top: 0px; bottom: 0px; left: 0px; right: 0px; overflow: hidden; padding: 0; margin: 0; background-color: #000; filter: alpha(opacity=50); opacity: 0.5; z-index: 1000; } .processMessage { position: absolute; font-family:Verdana; font-size:12px; font-weight:normal; color:#000066; top: 30%; left: 43%; padding: 10px; width: 18%; z-index: 1001; background-color: #fff; } </style> Step 2: Put the divs as shown below in UpdateProgress control. <asp:UpdateProgress ID="updPrgsBaselineTab" runat="server"> <ProgressTemplate> <div id="progressBackgroundFilter" class="progressBackgroundFilter"> </div> <div id="processMessage" class="processMessage"> <table width="100%"> <tr style="width: 100%"> <td style="width: 100%"> Please Wait.......... </td> </tr> <tr style="width: 100%"> <td style="width: 100%" align="center"> <img src="../Images/Update_Progress.gif" /> </td> </tr> </table> </div> </ProgressTemplate> </asp:UpdateProgress> span.fullpost {display:none;}

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How to check if the tab page is dirty and prompt the user to save before navigating away using ajaxtoolkit tab control in ASP.NET

Step 1: Put a hidden variable in Update panel <asp:HiddenField ID="hfIsDirty" runat="server" Value="0" /> Step 2: Put the following code in ajaxcontrol tool kit tabcontainer OnClientActiveTabChanged="ActiveTabChanged" Copy the following script in the aspx page. <script type="text/javascript"> //Trigger Server side post back for the Tab container function ActiveTabChanged(sender, e) { __doPostBack('<%= tcBaseline.ClientID %>', ''); } //Sets the dirty flag if the page is dirty function setDirty() { var hf = document.getElementById("<%=hfIsDirty.ClientID%>"); if (hf != null) hf.value = 1; } //Resets the dirty flag after save function clearDirty() { var hf = document.getElementById("<%=hfIsDirty.ClientID%>"); hf.value = 0; } function showMessage() { return "page is dirty" } function setControlChange() { if (typeof (event.srcElement) != 'undefined') { event.srcElement.onchange = setDirty; } } function checkDirty() { var tc = document.getElementById("<%=tcBaseline.ClientID%>"); var hf = document.getElementById("<%=hfIsDirty.ClientID%>"); if (hf.value == "1") { var conf = confirm("Do you want o loose unsaved changes? Please Cancel to stay on page or OK to continue "); if (conf) { clearDirty(); return true; } else { var e = window.event; e.cancelBubble = true; if (e.stopPropagation) e.stopPropagation(); return false; } } else return true; } document.body.onclick = setControlChange; document.body.onkeyup = setControlChange; var onBeforeUnloadFired = false; // Function to reset the above flag. function resetOnBeforeUnloadFired() { onBeforeUnloadFired = false; } function doBeforeUnload() { var hf = document.getElementById("<%=hfIsDirty.ClientID%>"); // If this function has not been run before... if (!onBeforeUnloadFired) { // Prevent this function from being run twice in succession. onBeforeUnloadFired = true; // If the form is dirty... if (hf.value == "1") { event.returnValue = "If you continue you will lose any changes that you have made to this record."; } } window.setTimeout("resetOnBeforeUnloadFired()", 1000); } if (window.body) { window.body.onbeforeunload = doBeforeUnload; } else window.onbeforeunload = doBeforeUnload; </script> Step 3: Here is how the tabcontrol should look like <asp:UpdatePanel ID="upTab" runat="server" UpdateMode="conditional"> <ContentTemplate> <ajaxtoolkit:TabContainer ID="tcBaseline" runat="server" Height="400px" OnClientActiveTabChanged="ActiveTabChanged"> <ajaxtoolkit:TabPanel ID="tpPersonalInformation" runat="server"> <HeaderTemplate> <asp:Label ID="lblPITab" runat="server" Text="<%$ Resources:Resources, Baseline_Tab_PersonalInformation %>" onclick="checkDirty();"></asp:Label> </HeaderTemplate> <ContentTemplate> <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder> </ContentTemplate> </ajaxtoolkit:TabPanel> span.fullpost {display:none;}

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The Basics of Project Management / Software Development

- by Sam

It suddenly struck me today that I have never developed any large application or worked with a team of programmers, and so am missing out a lot - both in terms of technical knowledge and the social-fun part of it. And I would like to rectify that - an idea is to start an open source group by training college students (for no charge) and developing some open source application with them. Please give me some basic advice on the whole process of how to (1) plan and (2) manage projects in a team. What new skill sets would you recommend? (I have read joel on software and 37 Signals, and got many insightful tips from them. But I'd like a little more technical knowledge ...) Background (freelancer, past 4+ years) - Computer engineer graphic / web designer online marketing moved on to programming in PHP, Perl, Python did Oracle DBA OCP training to understand DB's current self-assigned title - web application developer.

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Oracle Data Provider and casting

- by mrjoltcola

I use Oracle's specific data provider, not the Microsoft provider that is being discontinued. The thing I've found about ODP.NET is how picky it is with data types. Where JDBC and other ADO providers just convert and make things work, ODP.NET will throw an invalid cast exception unless you get it exactly right. Consider this code: String strSQL = "SELECT DOCUMENT_SEQ.NEXTVAL FROM DUAL"; OracleCommand cmd = new OracleCommand(strSQL, conn); reader = cmd.ExecuteReader(); if (reader != null && reader.Read()) { Int64 id = reader.GetInt64(0); return id; } Due to ODP.NET's pickiness on conversion, this doesn't work. My usual options are: 1) Retrieve into a Decimal and return it with a cast to an Int64 (I don't like this because Decimal is just overkill, and at least once I remember reading it was deprecated...) Decimal id = reader.GetDecimal(0); return (Int64)id; 2) Or cast in the SQL statement to make sure it fits into Int64, like NUMBER(18) String strSQL = "SELECT CAST(DOCUMENT_SEQ.NEXTVAL AS NUMBER(18)) FROM DUAL"; I do (2), because I feel its just not clean pulling a number into a .NET Decimal when my domain types are Int32 or Int64. Other providers I've used are nice (smart) enough to do the conversion on the fly. Any suggestions from the ODP.NET gurus?

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C#/.net features to cut off assuming no backward compatibility needed?

- by Gulshan

Any product or framework evolves. Mainly it's done to catch up the needs of it's users, leverage new computing powers and simply make it better. Sometimes the primary design goal also changes with the product. C# or .net framework is no exception. As we see, the present day 4th version is very much different comparing with the first one. But thing comes as a barricade to this evolution- backward compatibility. In most of frameworks/products there are features would have been cut off if there was no need to support backward compatibility. According to you, what are these features in C#/.net? Please mention one feature per answer.

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How to publicize new Android's HTTP requests library

- by Yaniv

I don't know if this really belongs here, but I developed an open-source HTTP requests library for Android called Unite. This library was built mainly to significantly facilitate the work and coding time, and makes it easy to create and work with HTTP requests. I think a big advantage of this library is that it is open-source, so everyone can contribute to make it even better. I started this project for personal use, and I really like the result. What is the right and proper way to publicize the project, I do think it will be handy to Android developers. So how can I make developers know this library exist?

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Community Programming

- by James Hill

Background I just began working for a religious non-profit organization. As with most non-profits, the organization is resource-poor and has no IT department to speak of. In my two months here I've received 20 requests for websites, apps, and internal automation. Many of these 20 requests have merit and would benefit the organization. I'm a .net web developer and as such the open source community is relatively foreign to me... Question For the sake of this question, lets say I'm talking about building a single, large, website. Does software (web based, hopefully) exist that would allow me to post requirements and assets (graphics and CSS) for a site, and then invite programmers to participate in the sites development? As a simple example, I could post the requirements and data for the about us page and an individual would indicate that they could/would fulfill the requirement. Upon completion, they could upload the new source code to the shared repository (github).

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Will there be any problem if i inherit aspx page from System.Web.Mvc.ViewPage

- by Vinni

I am developing a website which will be having both asp.net pages and MVC pages in it, So I have BaseWebPage class which will be used for both asp.net pages and MVC Views. but My BaseWebPage class is inherited from System.Web.Mvc.ViewPage, So Will there be any code/ functionality break for normal asp.net pages, because System.Web.Mvc.ViewPage is overriding some of the Pagelife cycle methods.

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Does Microsoft really offer "support"?

- by SpashHit

One of the arguments against using Open Source is that there is no "support". However, do big vendors (e.g. Microsoft) really offer "support" of any kind? I'm sure there is some sort of 4-figure-per-hour "paid support" option out there, but is that really an "option" for any problem short of one that is going to bankrupt your business? To put it more concretely... I buy a Microsoft product... it has a bug... now what? And how is that better than what I get from Open Source?

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GPL'ing code of a third party?

- by Mark

I am facing the following dilemma at the moment. I am using code from a scientific paper in a commercial project. So basically I copied and pasted the code from the paper's pdf into my code editor and use it in my own code. The code in the paper does not have any copy restrictions or license(like the GPL) so I thought I would be ok using it in a commercial project. However, I have seen several gpl licensed open source projects that use the exact same code from the paper to the point of having the same variable names like in the paper. So what happened here is that a gpl license was put on a third parties non gpl'ed code. Are these open source projects in violation of the gpl or would I be in violation of the gpl because I use code which has been gpl'ed? My common sense tells me it is not allowed to gpl somebody elses non-gpl'ed (like in this case from the paper) code but I though I would ask anyway.

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Is it too early to start designing for Task Parallel Library?

- by Joe Erickson

I have been following the development of the .NET Task Parallel Library (TPL) with great interest since Microsoft first announced it. There is no doubt in my mind that we will eventually take advantage of TPL. What I am questioning is whether it makes sense to start taking advantage of TPL when Visual Studio 2010 and .NET 4.0 are released, or whether it makes sense to wait a while longer. Why Start Now? The .NET 4.0 Task Parallel Library appears to be well designed and some relatively simple tests demonstrate that it works well on today's multi-core CPUs. I have been very interested in the potential advantages of using multiple lightweight threads to speed up our software since buying my first quad processor Dell Poweredge 6400 about seven years ago. Experiments at that time indicated that it was not worth the effort, which I attributed largely to the overhead of moving data between each CPU's cache (there was no shared cache back then) and RAM. Competitive advantage - some of our customers can never get enough performance and there is no doubt that we can build a faster product using TPL today. It sounds fun. Yes, I realize that some developers would rather poke themselves in the eye with a sharp stick, but we really enjoy maximizing performance. Why Wait? Are today's Intel Nehalem CPUs representative of where we are going as multi-core support matures? You can purchase a Nehalem CPU with 4 cores which share a single level 3 cache today, and most likely a 6 core CPU sharing a single level 3 cache by the time Visual Studio 2010 / .NET 4.0 are released. Obviously, the number of cores will go up over time, but what about the architecture? As the number of cores goes up, will they still share a cache? One issue with Nehalem is the fact that, even though there is a very fast interconnect between the cores, they have non-uniform memory access (NUMA) which can lead to lower performance and less predictable results. Will future multi-core architectures be able to do away with NUMA? Similarly, will the .NET Task Parallel Library change as it matures, requiring modifications to code to fully take advantage of it? Limitations Our core engine is 100% C# and has to run without full trust, so we are limited to using .NET APIs.

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What are the standard practices for database access in .net?

- by Gulshan

I have seen weird database access practices in .net. I have seen stored procedures for every database tasks. I have seen every database property name is preceded by it's table name. I have seen fully separate layer/.dll for very few or no business logic. I have seen along with ORMs, there are separate data access layer playing the same role. And with them, I have always heard- "These are the standards you have to maintain". So, what are the real standards for data access in .net? What are the rules you follow?

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C# or .Net features to cut off assuming no backward compatibility needed?

- by Gulshan

Any product or framework evolves. Mainly it's done to catch up the needs of it's users, leverage new computing powers and simply make it better. Sometimes the primary design goal also changes with the product. C# or .net framework is no exception. As we see, the present day 4th version is very much different comparing with the first one. But thing comes as a barricade to this evolution- backward compatibility. In most of frameworks/products there are features would have been cut off if there was no need to support backward compatibility. According to you, what are these features in C#/.net? Please mention one feature per answer.

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"./configure: command not found" error when trying to install the JRE

- by user74670

I was trying to install JRE on my 64-bit ubuntu 10.04 installation. Just to be sure that that is what I really want, I need to run a .jar file. I downloaded java from this link. Then I chose linux x64 and downloaded the tar file, I extracted it and tried to compile the source code but had the error. I don't know whether I downloaded the wrong file or I ran the wrong commands in the terminal After I changed directory using the cd command to the extracted directory, I tried ./configure but I got this error: ./configure: command not found I know that there is an easier way to install java but I just want to understand how to install an application from source in linux as it seems that I will face this problem in the future. Thanks in advance

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Is "watermarking" code with random trailing whitespace a good way to detect plagiarism?

- by paperjam

Consider this: int f(int x) { return 2 * x * x; } and this int squareAndDouble(int y) { return 2*y*y; } If you found these in independent bodies of code, you might give the two programmers the benefit of the doubt and assume they came up with more-or-less the same function independently. But look at the whitespace at the end of each line of code. Same pattern in both. Surely evidence of copying. On a larger piece of code, correlation of random whitespace at line ends would be irrefutable evidence of a shared origin. Now aside from the obvious weaknesses: e.g. visible or obvious in some editors, easily removed, I was wondering if it was worth deploying something like this in my open source project. My industry has a history of companies ripping off open source projects.

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Auto-generate WebControls

- by Adrian K

I want to generate .net code from a template so that it more rapid, so lazy developers (and I mean that in the nicest possible way!) don't have to write them in the IDE, compile them, etc... I know I can roll my own tool which generates the code using reflection (by reading in some text file, etc), but I just wondered if there was an easier than starting from scratch since this is what ASP.NET basically does already; so is there anyway to leverage this? E.g. to quote Peter A. Bromberg: Even an ASPX page with no code on it gets turned into an instance of the System.Web.UI.Page class. The page is parsed by the ASP.NET engine when it is first requested, and then its JIT compiled version is cached in the Temporary ASP.NET Files folder as long as the application is running and the .aspx page hasn't been changed. Ideally I want to auto-generate WebControls, but examples of anything closely related will do. C# Examples preferred also, but anything considered :)

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Getting started with Team Foundation Server

- by joe

At work, we recently started using Team Foundation Server to manage our source code, i have no idea how to use this system. I do not know even know how to check source code in and out. Does anyone know of a step-by-step tutorial on how to work with TFS? Just for basic operations e.g. get latest version, upload your changes, etc. I am accessing it from Visual Studio 2010. I also have access to the TFS web interface.

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How to merge VB.NET WEB Project with C#.NET MVC project

- by Thushara Perera

Hi All, I've got an existing asp.net project written in vb.net need to merge into C# ASP.NET MVC 1.0 application. I couldn't find a good article on this. I have successfully created a sample project and merge it. It works successfully. But when merge it into my real project it does not work. I've used C#.csproj project file and deleted VB project file. for the merging i could find a good article this link successful on sample project not with the real project. good one: http://www.packtpub.com/article/mixing-asp.net-webforms-and-asp.net-mvc how it is possible to merge VB Default.aspx, C# Default.aspx and VB Global.asax, C# Global.asax. Can I used VB.vbproj file insted of csproj Thanks Thushara Perera

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MPL with Commercial Use Restrictions (And Other Questions)

- by PythEch

So basicly I want to use MPL 2.0 for my open source software but I also want to forbid commercial use. I'm not a legal expert, that's why I'm asking. Should I use dual-license (MPL + Modified BSD License)? Or what does sublicensing mean? If I wanted to license my project, I would include a notice to the header. What should I do if want to dual-license or sublicense? Also, is it OK to use nicknames as copyright owners? I am not able to distribute additional files (e.g LICENSE.txt, README.md etc) with the software simply because it is just a JS script. By open-source I mean not obfuscated JS code. So in this case, am I forced to use GPL to make redistribution of obfuscated work illegal? Thanks for reading, any help is appreciated, answering all of the questions is not essential.

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Is there Java counterpart for Aspnet 4's <%: %> XSS prevention?

- by Tomas Tintera

I'm developer moving from C# to Java. Heard about new ASP net feature. <%: %. It renders object with html encoding. Only these impolementing IHtmlString interface are not encoded (to prevent double encoding). See more in http://weblogs.asp.net/scottgu/archive/2010/04/06/new-lt-gt-syntax-for-html-encoding-output-in-asp-net-4-and-asp-net-mvc-2.aspx Is such cute tool in Java side? I mean a way to output a string to webpage and (not)encode it based on it's type.

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Questions about software licensing

- by iwayneo

I've been having a discussion about licensing and open source software. Basically - the other guy is saying that licensing is easy, if you're going to build a product you can use an (any) open source project and make money by selling that code. My issue is that say I create a website or app with a project that uses a GPL license the restrictions aren't so straight forward - correct me if i'm wrong on each of these scenarios: 1 - i create an iPhone app using GPL code and put that app into the appstore - the code must be freely available to people buying that app. 2 - i create a website that my client hosts - they must have access to the code. 3 - i create a website as SaaS that my client "leases" but does not own - though it is hosted on their infrastructure - they must have access to that code Am i right on each of those assumptions? Are there any other issues i should be aware of under any other licensing terms for other licenses?

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FogBugz On Demand + online source control at low/no cost?

- by quux

I have a project in the free hosted FogBugz On Demand (FOD) product right now. This is great for feature/issue tracking. But I've been working from a codebase that is solely on my development machine. I'd like to collaborate with another guy who is thousands of miles from me. So we need a source control solution (SCM)! I use Visual Studio (2005, but can upgrade to later versions as needed). I am aware that FogBugz can integrate with a number of source control systems. So now the question is: which online SCM products can integrate well with FOD and VS? And which ones do so well at low or no cost, for a small code repository. And where might I find a proven recipe for putting this together. I'm open to other solutions which provide the same functionality. Please don't suggest Trac - I regard it highly, but I want the features of FOB (especially the evidence based scheduling) in my issue tracking solution. So really, I need to combine FOB + VS + some online SCM product into a low or no cost solution for two coders to collaborate on.

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Wanting to learn .NET, can I benefit from the MS discounts?

- by Chris

I quit high-school a couple of years ago and now I'm studying to get my diploma at a special course the EU created for people in my situation. This course is basically identical to normal high-school the only difference being fewer hours due to the fact that a lot of us have jobs(not me). I would like to learn windows development and .NET and I've seen around that they offer students some great discounts and even some free tools such as Visual Studio and Windows 7. I'm learning Java on Ubuntu at the moment but I'd like to move to .NET but can't afford Windows or other MS-related tools since I don't have a job and no real income. Can someone in my situation benefit from their offers?

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How to block the ASP.NET page while ajax UpdateProgress is being displayed.

Step 1: Copy the following styles to your aspx page. <style type="text/css"> .hide { display: none; } .show { display: inherit; } .progressBackgroundFilter { position: absolute; top: 0px; bottom: 0px; left: 0px; right: 0px; overflow: hidden; padding: 0; margin: 0; background-color: #000; filter: alpha(opacity=50); opacity: 0.5; z-index: 1000; } .processMessage { position: absolute; font-family:Verdana; font-size:12px; font-weight:normal; color:#000066; top: 30%; left: 43%; padding: 10px; width: 18%; z-index: 1001; background-color: #fff; } </style> Step 2: Put the divs as shown below in UpdateProgress control. <asp:UpdateProgress ID="updPrgsBaselineTab" runat="server"> <ProgressTemplate> <div id="progressBackgroundFilter" class="progressBackgroundFilter"> </div> <div id="processMessage" class="processMessage"> <table width="100%"> <tr style="width: 100%"> <td style="width: 100%"> Please Wait.......... </td> </tr> <tr style="width: 100%"> <td style="width: 100%" align="center"> <img src="../Images/Update_Progress.gif" /> </td> </tr> </table> </div> </ProgressTemplate> </asp:UpdateProgress> span.fullpost {display:none;}

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Modules already committed, client doesn't pay, what should I do?

- by John

So the story is simple, early stage EU portal hired me to do some extra modules. I got all the source code for local testing, did my job, committed new code. Now I am out of this project but client still haven't paid me yet and he is not even thinking about that. It has been couple of months and no contract was signed so I can't take any legal actions. What should I do with all the source code? Sell it? Run exact copy of that portal? Make all portal publicly available?

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