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  • .NET: Allow NULLS in DB fields?

    - by mark smith
    Hi there, I have the task of re-factoring an SQLServer DB.... A lot of the tables and columns "ALLOW NULLS", Is this good practice... I seem to remember the authour of CSLA.NET saying it was really bad practice to allow nulls in a DB... If this is the case, what are my alternatives? Remove all "ALLOW NULLS" from all columns.... and in numeric columns use a value of -1 for example?? I would really appreciate any input anyone has. I am currently using a Model (from entity framework) from my DB and the db columns that "ALLOW NULLS" are null ... and some of the stored procedures require that i have a default value... i.e. BOOLEAN require FALSE as default ... but it is null.. Well i don't want to stray from my original question, ALLOW NULLS are a bad thing from what i can gather .... so how do i fix this ? Any help really appreciated

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  • How do chains work in Rainbow tables?

    - by James Moore
    Hello, I was wondering if should one could explain in detail how chains work in rainbow tables as though you would a complete novice but with relevance to programming. I understand that a chain is 16 bytes long. 8 bytes mark the starting point and 8 mark the end. I also understand that in the filename we have the chain length i.e. 2400. Which means that between our starting point and end point in just 16 bytes we have 2400 possible clear texts? What? How does that work? in those 16 bytes how do i get my 2400 hashes and clear texts or am i miss understanding this? Your help is greatly appreciated. Thanks P.s. I have read the related papers and googled this topic a fair bit. I think im just missing something important to make these gears turn.

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  • jQuery, checking to see if video has height/width

    - by Mark
    I have a <video> element that is generated by js, and I need to get the height and width of it. var v = $('video'); v.height() returns null, because when it's run, the video hasn't yet been loaded, so no dimensions in the DOM. How do I check to see if the video has received a dimension, and if it hasn't, wait till it has to get the height and width. Thanks.

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  • Can Internet Explorer bind events to absolute positioned elements ?

    - by mark
    Can Internet Explorer bind events to absolute positioned elements ? I can't bind a "click" to an element that is overlapping another. Have tried loads of different ways, here a few tests that don't work in IE: //version 1: $(".classHolder").click(function(){ alert( $(this).html() ); }); //version 2: $(".classHolder").each(function(){ $(this).click(function(){ alert( $(this).html() ); }); }); //version 3: $("#id3").click(function(){ alert( $(this).html() ); }); //version 4: $("#id3").click(function(){ alert( $(this).html() ); }); $("#id3").trigger("click"); // in all trials I tested with and without: // $("img").unbind(); // $("div").unbind(); // just to make sure no "ghost" events were bind into the elements but no success. // replace all [ for < , and all ] for [html] [head] [script src="http://code.jquery.com/jquery-latest.js"][/script] [script type="application/javascript"] $(document).ready(function(){ $("#id3").click(function(){ alert( $(this).html() ); }); $("#id3").trigger("click"); }); [/script] [/head] [body] [div id="id1" style="position:relative;"] [img id="id2" src="http://www.google.co.uk/intl/en_com/images/srpr/logo1w.png" style=";z-index:-1;"/] [div id="id3" class="classHolder" style="position:absolute;border:2px solid red;left:0px;top:0px;width:70px;height:70px;z-index:1002;"]G[/div] [div id="id4" class="classHolder" style="position:absolute;border:2px solid red;left:210px;top:0px;width:25px;height:70px;z-index:1001;"]L[/div] asd asdf asdfg [/div] [/body] [/html]

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  • Python: undefined reference to `_imp __Py_InitModule4'

    - by Mark
    I'm trying to do a debug build of the Rabbyt library using mingw's gcc to run with my MSVC built python26_d.. I got a lot of undefined references which caused me to create libpython26_d.a, however one of the undefined references remains. Googling gives me: http://www.techlists.org/archives/programming/pythonlist/2003-03/msg01035.shtml But -rdynamic doesn't help. e:\MinGW/bin\gcc.exe -mno-cygwin -mdll -O -Wall -g -IE:\code\python\python\py26\ include -IE:\code\python\python\py26\PC -c rabbyt/rabbyt._rabbyt.c -o build\temp .win32-2.6-pydebug\Debug\rabbyt\rabbyt._rabbyt.o -O3 -fno-strict-aliasing rabbyt/rabbyt._rabbyt.c:1351: warning: '__Pyx_SetItemInt' defined but not used writing build\temp.win32-2.6-pydebug\Debug\rabbyt\_rabbyt_d.def e:\MinGW/bin\gcc.exe -mno-cygwin -shared -g build\temp.win32-2.6-pydebug\Debug\r abbyt\rabbyt._rabbyt.o build\temp.win32-2.6-pydebug\Debug\rabbyt\_rabbyt_d.def - LE:\code\python\python\py26\libs -LE:\code\python\python\py26\PCbuild -lopengl32 -lglu32 -lpython26_d -lmsvcr90 -o build\lib.win32-2.6-pydebug\rabbyt\_rabbyt_d. pyd build\temp.win32-2.6-pydebug\Debug\rabbyt\rabbyt._rabbyt.o: In function `init_ra bbyt': E:/code/python/rabbyt/rabbyt/rabbyt._rabbyt.c:1121: undefined reference to `_imp __Py_InitModule4'

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  • How can you calculate the X/Y coordinate to zoom to

    - by Mark
    Im writing a WPF application that has a zoom and pan ability, but what I want to also implement is the ability to zoom and pan "automatically" (via a button click). I have the methods all defined to zoom and pan, but Im having trouble telling the app the desired X/Y coordinates for the panning. Basically, I know that I want the control to be centered at a desired zoom level (say zoomed in 6X times), but the panning destination point is NOT the center point of the control because after the zooming, its been scaled. Does anyone know a way of calculating the desired X/Y position to pan to, taking into account the zooming as well? Do I just scale the desired destination Point? It doesnt seem to work for me... Thanks a lot

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  • Visual Studio 2010 Database Projects: Are there any videos/tutorials or comments about the new Datab

    - by Mark Redman
    I have recently upgraded to Visual Studio 2010. I have kept database projects separate to application projects. The database project was converted from and old DPR project and added a whole lot of additional folder. I deleted those, but now I suspect I need to recreate the project as these new projects work very differently. Now that I have need to update scripts, it seems I can even paste new SQL files into the project so am a bit stuck. Are there any tutorials / walkthrough that show the basics on starting and creating a database project? Or even better a video? Also if there are any tips and tricks or comments on this, I will be happy to hear them?

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  • Reading and writing XML over an SslStream

    - by Mark
    I want to read and write XML data over an SslStream. The data (written and read) consists of objects serialized by an XmlSerializer. I have tried the following; (left some details out for clarity!) TcpClient tcpClient = new TcpClient(server, port); SslStream sslStream = new SslStream(tcpClient.GetStream(), true, new RemoteCertificateValidationCallback(ValidateServerCertificate), null); sslStream.AuthenticateAsClient(server); XmlReader xmlReader = XmlReader.Create(sslStream,readerSettings); XmlWriter xmlWriter = XmlWriter.Create(sslStream,writerSettings); myClass c = new myClass (); XmlSerializer serializer = new XmlSerializer(typeof(myClass)); serializer.Serialize(xmlWriter, c); myClass c2 = (myClass )serializer.Deserialize(xmlReader); First of all, it appears that writing to the stream succeeds. But the XmlSerializer throws an error because of invalid XML. It appears that the first character read from the stream is '00' or a null-character. (I have googled this problem, and see a million people with the same 'problem', but no viable solution.) I can work around this 'issue' by using a StreamReader, read everything into a string and then use that string as input for another stream that the serializer can use. (Very dirty, but it works.) Second problem is, that when I try to use the same SslStream to write a second request, I do not get a response from the Reader. (The server DOES send a valid XML response though!) So the serializer.Serialize(xmlWriter, c3) works, but reading from the stream yields no results. I have tried several different classes that implement Stream. (StreamReader, XmlTextReader, etc.) Anyone has an idea how reading and writing XML data to and from an SslStream is supposed to work? Thanks in advance!

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  • Why is my ipad's wireless so flakey?

    - by Mark
    I'm the proud owner of a new IPad here in the UK. All is good, except for the wifi, which is a bit flakey. It connects fine to my Draytek router which is set for WPA/WPA2 and 56g only, displaying full signal strength. Then, after a few minutes, it goes down to minimum strength... And sometimes it goes back up again. A few times, it seems to loose connection completely, and needs to be turned off and on again. I've looked at the Apple support site, and have tried their recommendations (which are not really very relevant), but still nothing. I've tried setting the router to wpa2 only, and setting long-preamble. Right now, I guess I want to know if it's a hardware problem with my device and should be returned, or if it's a problem with all ipads which will be resolved. Guess I could take it back to the Mac genius bar, but I find those guys so incredibly pretentious and, frankly, rather useless, that i'd rather wait until I've exercised other options!

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  • MFMailComposerViewController doesn't always display attachments

    - by davbryn
    I'm attaching a few files to an email to export from the application I've written, namely a .pdf and a .png. I create these by rendering some view to a context and creating an image and a pdf. I can validate that the files are created properly (I can confirm this by looking in my apps sandbox from Finder, and also by sending the email. I receive the files correctly.) The problem I'm getting is that larger files don't have a preview generated for them within the MFMailComposerViewController view (I simply get a blue icon with a question mark). Is there a limitation on file sizes that can be attached in order for preview to function correctly? With small files it works as expected, but if I try and attach a pdf with the following properties: Pages: 1 Dimensions: 2414 x 1452 Size: 307 KB the file is generated correctly, but displays the question mark icon. If there is no way around that, can I remove the attachment preview altogether? Many thanks, Bryn

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  • Intellij-Idea: Marking all files of unknown type be type: text (so that they are searchable)

    - by sixtyfootersdude
    Many of my scripts etc in intellij are marked with a question mark. Then when I click on them them it prompts me: The file "bla" cannot be associated with a registered file type. Please choose one: <insert table of file choices> This would not matter except the files are not searchable (with ctrl-shift-n) until they are marked as text. This is a major problem for me. I have an enormous code base and I don't want to mark all of the unknown files as text. Is there anyway that I can do that? *(Note: I have cross posted this to the intellij form

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  • reading excell file in vb.net

    - by Mark
    can anyone help me on how to know EOF of excel using vb.net? i have this code but it crash when i try delete the proceeding rows from row 6 to downward. my problem is, my code was still reading a null values of rows that i deleted in excel.. this is my code: Dim xlsConn As New OleDbConnection Dim xlsAdapter As New OleDbDataAdapter Dim xlsDataSet As New DataSet xlsConn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & pathName & " ; Extended Properties=Excel 8.0") strSQL = "SELECT * FROM [Sheet1$]" xlsAdapter.SelectCommand = New OleDbCommand(strSQL, xlsConn) xlsDataSet.Clear() xlsAdapter.Fill(xlsDataSet) ListView1.Items.Clear() Dim listItem As ListViewItem For ctr As Integer = 0 To xlsDataSet.Tables(0).Rows.Count - 1 listItem = ListView1.Items.Add(xlsDataSet.Tables(0).Rows(ctr).Item("EmpNo").ToString) listItem.SubItems.Add(xlsDataSet.Tables(0).Rows(ctr).Item("EmpName").ToString) Next Can anyone help me to fix this bugs!

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  • Roles / Permissions framework for c#?

    - by mark smith
    Hi there, Does anyone know of a good framework to allow me design permission and roles against users. Basically allowing me to automatically check a user can do a certain thing, and then disabling or enabling menu items etc I am not really looking for asp.net security ... as i need to use it in my own service layer and clients both WEB and WPF will use it. I was hoping for something that allows me to create new roles and groups against users and then check what type of permissions a user has or a group has Any help really appreciated.. I am sure some kind of open source framework is available, well i was hoping not having to create my own Thanks

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  • Comparison of web template engines

    - by Mark
    Post a snippet of code from your favorite templating engine, with the name of the engine and a link to its homepage; show off its basic syntax and maybe some neat features about it that makes it unique. Hopefully this will give people an idea of what's out there and make it easier for them to decide on an engine.

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  • DWR and Jquery into spring MVC 2.5

    - by Mark Estrada
    Hi, From my shallow reading, Spring MVC does not support jquery directly. It does enable integration with DWR framework. From my understanding of DWR, it is an ajax framework that allows you to call javas methods from javascript. Can I use both in my application? With Jquery handling most of the javascript code and client side interaction and DWR making the ajax calls? I am leaning towards learning jquery but there is no out of the box support for it in spring 2.5.

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  • HTML Slideshow plugin

    - by Mark Szymanski
    I am making a website with some screenshots of an iPhone app I made and was wondering if there was some kind of slideshow thing for HTML. I want it to have the iPhone frame and the slideshow with the screenshots in the middle of it. I would prefer it to be written in something other than flash. Thanks in advance!

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  • .NET /asp.net 4: Changes with automatic NAMES of controls?

    - by mark smith
    Hi there, I just updated an app from .net 2.0 to .net 4.0 and i have noticed the following... For example i have the following control.. <input type="hidden" name="ctl00$cphMain$hfdFueraHorarioOficinaConfirmado" id="cphMain_hfdFueraHorarioOficinaConfirmado" value="False" /> and then in javascript i did this before.. var hfdFueraHorarioOficinaConfirmado=document.getElementById('ctl00_cphMain_hfdFueraHorarioOficinaConfirmado'); but after checking the Id within the html source once it renders and also doing some debugging with firebug etc.... it has changed from ctl00_cphMain_hfdFueraHorarioOficinaConfirmado to cphMain_hfdFueraHorarioOficinaConfirmado can anyone explain why? .... so should i basically do a search and replace and remove the ctl00?????? A little confused Obviosuly the javascript line with the the ctl00_ infront return NULL because it doesn't exist, but removing this returns the object.. Any help or ideas really appreciated Thanks

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