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  • Explicit casting doesn't work in default model binding

    - by Felix
    I am using ASP.NET MVC2 and Entity Framework. I am going to simplify the situation a little; hopefully it will make it clearer, not more confusing! I have a controller action to create address, and the country is a lookup table (in other words, there is a one-to-many relationship between Country and Address classes). Let's say for clarity that the field in the Address class is called Address.Land. And, for the purposes of the dropdown list, I am getting Country.CountryID and Country.Name. I am aware of Model vs. Input validation. So, if I call the dropdown field formLand - I can make it work. But if I call the field Land (that is, matching the variable in Address class) - I am getting the following error: "The parameter conversion from type 'System.String' to type 'App.Country' failed because no type converter can convert between these types." OK, this makes sense. A string (CountryID) comes from the form and the binder doesn't know how to convert it to Country type. So, I wrote the converter: namespace App { public partial class Country { public static explicit operator Country(string countryID) { AppEntities context = new AppEntities(); Country country = (Country) context.GetObjectByKey( new EntityKey("AppEntities.Countries", "CountryID", countryID)); return country; } } } FWIW, I tried both explicit and implicit. I tested it from the controller - Country c = (Country)"fr" - and it works fine. However, it never got invoked when the View is posted. I am getting the same "no type converter" error in the model. Any ideas how to hint to the model binder that there is a type converter? Thanks

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  • Searching Week-wise/Month-wise record counts(number) and the StartDate+EndDate(datetime) of the Week

    - by Muzaffar Ali Rana
    I have a question in connection to this question earlier posted by me:- http://stackoverflow.com/questions/2452984/daily-weekly-monthly-record-count-search-via-storedprocedure I want to have the Count of Calls on Weekly-basis and Monthly-basis, Daily-basis issue is resolved. ISSUE NUMBER @1:Weekly-basis Count of Calls and Start-Date and End-Date of Week I have searched the Start-Date and End-Date of Week including their individual Count of Calls as well in the below-mentioned query. But the problem is that I could not get the result in one single table, although I have used the Temporary Tables(#TempTable+#TempTable2). Kindly help me in this regards. NOTE:Table Creation commented as for executing more than once. ----- *** TABLE CREATION OF #TempTable & #TempTable2 *** ---------- --CREATE TABLE #TempTable( StartDate datetime,EndDate datetime,CallCount numeric(18,5)) --CREATE TABLE #TempTable2( StartDate datetime,EndDate datetime,CallCount numeric(18,5)) DECLARE @StartDate datetime,@EndDate datetime,@StartDateTemp1 datetime,@StartDateTemp2 datetime,@EndDateTemp datetime,@Period varchar(50); SET @StartDate='1/1/2010'; SET @EndDate='2/28/2010'; SET @StartDateTemp1=@StartDate; SET @StartDateTemp2=DATEADD(dd, 7, @StartDate ); SET @Period='Weekly'; IF (@Period = 'Weekly') BEGIN WHILE ((@StartDate <= @StartDateTemp1) AND (@StartDateTemp2 <= @EndDate)) BEGIN IF((@StartDateTemp1 < @StartDateTemp2 ) AND (@StartDateTemp1 != @StartDateTemp2) ) BEGIN SELECT convert(varchar, @StartDateTemp1, 106) AS 'Start Date', convert(varchar, @StartDateTemp2, 106) AS 'End Date', COUNT(*) AS 'Call Count' FROM TRN_Call WHERE (CallTime = @StartDateTemp1 AND CallTime <= @StartDateTemp2 ); END SET @StartDateTemp1 = DATEADD(dd, 7, @StartDateTemp1); SET @StartDateTemp2 = DATEADD(dd, 7, @StartDateTemp2); END END ISSUE NUMBER @2:Monthly-basis Count of Calls and Start-Date and End-Date of Week In this case, I have the same search, but will have to search the Call Counts plus the Start-Date and End-Date of the Month. Kindly help me in this regards as well.

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  • C# Web Reference and PHP

    - by Louis
    I am attempting to call a Web Service (created in PHP) from my C# application. I have successfully added the Web Reference in Visual Studios, however I cannot figure out exactly how to invoke the call to the web service. I have been following this tutorial: http://sanity-free.org/article25.html however when I try and compile I get a "The type or namespace name 'SimpleService' could not be found". My C# code is as follows: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO; namespace inVision_OCR { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void translateButton_Click(object sender, EventArgs e) { // We need to snap the image here somehow . . . // Open up the image and read its contents into a string FileStream file = new FileStream("\\Hard Disk\\ocr_images\\test.jpg", FileMode.Open); StreamReader sr = new StreamReader(file); string s = sr.ReadToEnd(); sr.Close(); // Using SOAP, pass this message to our development server SimpleService svc = new SimpleService(); string s1 = svc.getOCR("test"); MessageBox.Show(s); } } } Any help would be appreciated.

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  • Html Select List: why would onchange be called twice?

    - by Mark Redman
    I have a page with a select list (ASP.NET MVC Page) The select list and onchange event specified like this: <%=Html.DropDownList("CompanyID", Model.CompanySelectList, "(select company)", new { @class = "data-entry-field", @onchange = "companySelectListChanged()" })%> The companySelectListChanged function is getting called twice? I am using the nifty code in this question to get the caller. both times the caller is the onchange event, however if i look at the callers caller using: arguments.callee.caller.caller the first call returns some system code as the caller (i presume) and the second call returns undefined. I am checking for undefined to only react once to onchange, but this doesnt seem ideal, whcy would onchange be called twice? UPDATE: ok, found the culprit! ...apart from me :-) but the issue of calling the companySelectListChanged function twice still stands. The onchange event is set directly on the select as mentioned. This calls the companySelectListChanged function. ..notice the 'data-entry-field' class, now in a separate linked javascript file a change event on all fields with this class is bound to a function that changes the colour of the save button. This means there is two events on the onchange, but the companySelectListChanged is called twice? The additional binding is set as follows: $('.data-entry-field').bind('keypress keyup change', function (e) { highLightSaveButtons(); }); Assuming its possible to have 2 change events on the select list, its would assume that setting keypress & keyup events may be breaking something? Any ideas?

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  • Suggestions for doing async I/O with Task Parallel Library

    - by anelson
    I have some high performance file transfer code which I wrote in C# using the Async Programming Model (APM) idiom (eg, BeginRead/EndRead). This code reads a file from a local disk and writes it to a socket. For best performance on modern hardware, it's important to keep more than one outstanding I/O operation in flight whenever possible. Thus, I post several BeginRead operations on the file, then when one completes, I call a BeginSend on the socket, and when that completes I do another BeginRead on the file. The details are a bit more complicated than that but at the high level that's the idea. I've got the APM-based code working, but it's very hard to follow and probably has subtle concurrency bugs. I'd love to use TPL for this instead. I figured Task.Factory.FromAsync would just about do it, but there's a catch. All of the I/O samples I've seen (most particularly the StreamExtensions class in the Parallel Extensions Extras) assume one read followed by one write. This won't perform the way I need. I can't use something simple like Parallel.ForEach or the Extras extension Task.Factory.Iterate because the async I/O tasks don't spend much time on a worker thread, so Parallel just starts up another task, resulting in potentially dozens or hundreds of pending I/O operations; way too much! You can work around that by Waiting on your tasks, but that causes creation of an event handle (a kernel object), and a blocking wait on a task wait handle, which ties up a worker thread. My APM-based implementation avoids both of those things. I've been playing around with different ways to keep multiple read/write operations in flight, and I've managed to do so using continuations that call a method that creates another task, but it feels awkward, and definitely doesn't feel like idiomatic TPL. Has anyone else grappled with an issue like this with the TPL? Any suggestions?

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  • Slimbox 2 Plugin, jQuery Flickr, and IE8

    - by Nick H.
    Hello, I am currently developing a site that I make use of two jQuery plugins: Flickr jquery plugin (http://code.google.com/p/jquery-flickr/) Slimbox (http://code.google.com/p/slimbox/) The first plugin is used to pull in flickr photos from a specific account. These photos are displayed as thumbnails on the page. I am then using the second plugin to display larger views of these images. Because the flickr photos are fetched when the page loads, I am calling the Slimbox 2 function like this: $(document).ready(function() { $("#Flickr").flickr(); //Call Flickr plugin $(window).bind('load', function() { $("#Flickr a").slimbox();//Call Slimbox2 }); }); On first testing this seemed to have worked perfectly. I tested multiple versions of FireFox, IE7, IE6, and Safari. Everything is great. However, the Slimbox lightbox effest does not work in IE8. However, if I put IE8 into compatibility mode, everything works as expected. I would like to avoid forcing compatibility mode. There are no javascript errors and I am at a loss for testing. Here is a link to a sample: http://www.njhall.com/JRMcCourt-Builders/index.html#ourwork Any advice would be greatly appreciated. Thanks Nick

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  • How can I use external expressions in Linq with EF4 (and LINQKit)?

    - by neo
    I want to separate out often used expressions in linq queries. I'm using Entity Framework 4 and also LINQKit but I still don't know how I should do it the right way. Let me give you an example: Article article = dataContainer.Articles.FirstOrDefault(a => a.Id == id); IEnumerable<Comment> comments = (from c in container.Comments where CommentExpressions.IsApproved.Invoke(c) select c); public static class CommentExpressions { public static Expression<Func<Module, bool>> IsApproved { get { return m => m.IsApproved; } } } Of course the IsApproved expression would be something much more complicated. The problem is that the Invoke() won't work because I didn't call .asExpandable() from LINQKit on container.Comments but I can't call it because it's just an ICollection instead of an ObjectSet. So my question is: Do I always have to go through the data context when I want to include external expressions or can I somehow use it on the object I fetched (Article)? Any ideas or best practices? Thanks very much! neo

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  • Keyboard navigation for jQuery Tabs

    - by Binyamin
    How to make Keyboard navigation left/up/right/down (like for photo gallery) feature for jQury Tabs with History? Demo without Keyboard feature in http://dl.dropbox.com/u/6594481/tabs/index.html Needed functions: 1. on keyboardtop/down make select and CSS showactivenested ajax tabs from 1-st to last level 2. on keyboardleft/right changeback/forwardcontent ofactivenested ajax tabs tab 3. an extra option, makeactivenested ajax tab on 'cursor-on' on concrete nested ajax tabs level Read more detailed question with example pictures in http://stackoverflow.com/questions/2975003/jquery-tools-to-make-keyboard-and-cookies-feature-for-ajaxed-tabs-with-history /** * @license * jQuery Tools @VERSION Tabs- The basics of UI design. * * NO COPYRIGHTS OR LICENSES. DO WHAT YOU LIKE. * * http://flowplayer.org/tools/tabs/ * * Since: November 2008 * Date: @DATE */ (function($) { // static constructs $.tools = $.tools || {version: '@VERSION'}; $.tools.tabs = { conf: { tabs: 'a', current: 'current', onBeforeClick: null, onClick: null, effect: 'default', initialIndex: 0, event: 'click', rotate: false, // 1.2 history: false }, addEffect: function(name, fn) { effects[name] = fn; } }; var effects = { // simple "toggle" effect 'default': function(i, done) { this.getPanes().hide().eq(i).show(); done.call(); }, /* configuration: - fadeOutSpeed (positive value does "crossfading") - fadeInSpeed */ fade: function(i, done) { var conf = this.getConf(), speed = conf.fadeOutSpeed, panes = this.getPanes(); if (speed) { panes.fadeOut(speed); } else { panes.hide(); } panes.eq(i).fadeIn(conf.fadeInSpeed, done); }, // for basic accordions slide: function(i, done) { this.getPanes().slideUp(200); this.getPanes().eq(i).slideDown(400, done); }, /** * AJAX effect */ ajax: function(i, done) { this.getPanes().eq(0).load(this.getTabs().eq(i).attr("href"), done); } }; var w; /** * Horizontal accordion * * @deprecated will be replaced with a more robust implementation */ $.tools.tabs.addEffect("horizontal", function(i, done) { // store original width of a pane into memory if (!w) { w = this.getPanes().eq(0).width(); } // set current pane's width to zero this.getCurrentPane().animate({width: 0}, function() { $(this).hide(); }); // grow opened pane to it's original width this.getPanes().eq(i).animate({width: w}, function() { $(this).show(); done.call(); }); }); function Tabs(root, paneSelector, conf) { var self = this, trigger = root.add(this), tabs = root.find(conf.tabs), panes = paneSelector.jquery ? paneSelector : root.children(paneSelector), current; // make sure tabs and panes are found if (!tabs.length) { tabs = root.children(); } if (!panes.length) { panes = root.parent().find(paneSelector); } if (!panes.length) { panes = $(paneSelector); } // public methods $.extend(this, { click: function(i, e) { var tab = tabs.eq(i); if (typeof i == 'string' && i.replace("#", "")) { tab = tabs.filter("[href*=" + i.replace("#", "") + "]"); i = Math.max(tabs.index(tab), 0); } if (conf.rotate) { var last = tabs.length -1; if (i < 0) { return self.click(last, e); } if (i > last) { return self.click(0, e); } } if (!tab.length) { if (current >= 0) { return self; } i = conf.initialIndex; tab = tabs.eq(i); } // current tab is being clicked if (i === current) { return self; } // possibility to cancel click action e = e || $.Event(); e.type = "onBeforeClick"; trigger.trigger(e, [i]); if (e.isDefaultPrevented()) { return; } // call the effect effects[conf.effect].call(self, i, function() { // onClick callback e.type = "onClick"; trigger.trigger(e, [i]); }); // default behaviour current = i; tabs.removeClass(conf.current); tab.addClass(conf.current); return self; }, getConf: function() { return conf; }, getTabs: function() { return tabs; }, getPanes: function() { return panes; }, getCurrentPane: function() { return panes.eq(current); }, getCurrentTab: function() { return tabs.eq(current); }, getIndex: function() { return current; }, next: function() { return self.click(current + 1); }, prev: function() { return self.click(current - 1); } }); // callbacks $.each("onBeforeClick,onClick".split(","), function(i, name) { // configuration if ($.isFunction(conf[name])) { $(self).bind(name, conf[name]); } // API self[name] = function(fn) { $(self).bind(name, fn); return self; }; }); if (conf.history && $.fn.history) { $.tools.history.init(tabs); conf.event = 'history'; } // setup click actions for each tab tabs.each(function(i) { $(this).bind(conf.event, function(e) { self.click(i, e); return e.preventDefault(); }); }); // cross tab anchor link panes.find("a[href^=#]").click(function(e) { self.click($(this).attr("href"), e); }); // open initial tab if (location.hash) { self.click(location.hash); } else { if (conf.initialIndex === 0 || conf.initialIndex > 0) { self.click(conf.initialIndex); } } } // jQuery plugin implementation $.fn.tabs = function(paneSelector, conf) { // return existing instance var el = this.data("tabs"); if (el) { return el; } if ($.isFunction(conf)) { conf = {onBeforeClick: conf}; } // setup conf conf = $.extend({}, $.tools.tabs.conf, conf); this.each(function() { el = new Tabs($(this), paneSelector, conf); $(this).data("tabs", el); }); return conf.api ? el: this; }; }) (jQuery); /** * @license * jQuery Tools @VERSION History "Back button for AJAX apps" * * NO COPYRIGHTS OR LICENSES. DO WHAT YOU LIKE. * * http://flowplayer.org/tools/toolbox/history.html * * Since: Mar 2010 * Date: @DATE */ (function($) { var hash, iframe, links, inited; $.tools = $.tools || {version: '@VERSION'}; $.tools.history = { init: function(els) { if (inited) { return; } // IE if ($.browser.msie && $.browser.version < '8') { // create iframe that is constantly checked for hash changes if (!iframe) { iframe = $("<iframe/>").attr("src", "javascript:false;").hide().get(0); $("body").append(iframe); setInterval(function() { var idoc = iframe.contentWindow.document, h = idoc.location.hash; if (hash !== h) { $.event.trigger("hash", h); } }, 100); setIframeLocation(location.hash || '#'); } // other browsers scans for location.hash changes directly without iframe hack } else { setInterval(function() { var h = location.hash; if (h !== hash) { $.event.trigger("hash", h); } }, 100); } links = !links ? els : links.add(els); els.click(function(e) { var href = $(this).attr("href"); if (iframe) { setIframeLocation(href); } // handle non-anchor links if (href.slice(0, 1) != "#") { location.href = "#" + href; return e.preventDefault(); } }); inited = true; } }; function setIframeLocation(h) { if (h) { var doc = iframe.contentWindow.document; doc.open().close(); doc.location.hash = h; } } // global histroy change listener $(window).bind("hash", function(e, h) { if (h) { links.filter(function() { var href = $(this).attr("href"); return href == h || href == h.replace("#", ""); }).trigger("history", [h]); } else { links.eq(0).trigger("history", [h]); } hash = h; window.location.hash = hash; }); // jQuery plugin implementation $.fn.history = function(fn) { $.tools.history.init(this); // return jQuery return this.bind("history", fn); }; })(jQuery); $(function() { $("#list").tabs("#content > div", {effect: 'ajax', history: true}); });

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  • ASP Classic page quit working

    - by justSteve
    I've had a set of legacy pages running on my IIS7 server for at least a year. Sometime last week something changed and now this line: Response.Write CStr(myRS(0).name) & "=" & Cstr(myRS(0).value) which used to return nothing more exciting than the string: 'Updated=true' (the sproc processing input params, stores them to a table, checks for errors and when that's all done returns a success code by executing this statement: select 'true' as [Updated] Now my pageside error handler is being involved and offers: myError=Error from /logQuizScore.asp Error source: Microsoft VBScript runtime error Error number: 13 Error description: Type mismatch Important to note that all lots of pages use the same framework - same db, same coding format, connecitonstrings and (so far as I can tell) all others are working. Troubleshot to this point: The call to the stored procedure is working correctly (stuff is stored to the given table). The output from the stored procedure is working correctly (i can execute a direct call with the given parameters and stuff works. I can see profiler calling and passing. I can replace all code with 'select 'true' as updated' and the error is the same. everything up to the response.write statement above is correct. So something changed how ADO renders that particular recordset. So i try: Response.Write myRS.Item.count and get: Error number: 424 Error description: Object required The recordset object seems not to be instantiating but the command object _did execute. Repeat - lots of other pages just the same basic logic to hit other sprocs without a problem. full code snippet set cmd1 = Server.CreateObject("ADODB.Command") cmd1.ActiveConnection = MM_cnCompliance4_STRING cmd1.CommandText = "dbo._usp_UserAnswers_INSERT" ... cmd1.CommandType = 4 cmd1.CommandTimeout = 0 cmd1.Prepared = true set myRS = cmd1.Execute Response.Write CStr(myRS(0).name) & "=" & Cstr(myRS(0).value)

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  • Javascript/Greasemonkey: search for something then set result as a value

    - by thewinchester
    Ok, I'm a bit of a n00b when it comes to JS (I'm not the greatest programmer) so please be gentle - specially if my questions been asked already somewhere and I'm too stupid to find the right answer. Self deprecation out of the way, let's get to the question. Problem There is a site me and a large group of friends frequently use which doesn't display all the information we may like to know - in this case an airline bookings site and the class of travel. While the information is buried in the code of the page, it isn't displayed anywhere to the user. Using a Greasemonkey script, I'd like to liberate this piece of information and display it in a suitable format. Here's the psuedocode of what I'm looking to do. Search dom for specified element define variables Find a string of text If found Set result to a variable Write contents to page at a specific location (before a specified div) If not found Do nothing I think I've achieved most of it so far, except for the key bits of: Searching for the string: The page needs to search for the following piece of text in the page HEAD: mileageRequest += "&CLASSES=S,S-S,S-S"; The Content I need to extract and store is between the second equals (=) sign and the last comma ("). The contents of this area can be any letter between A-Z. I'm not fussed about splitting it up into an array so I could use the elements individually at this stage. Writing the result to a location: Taking that found piece of text and writing it to another location. Code so far This is what I've come up so far, with bits missing highlighted. buttons = document.getElementById('buttons'); ''Search goes here var flightClasses = document.createElement("div"); flightClasses.innerHTML = '<div id="flightClasses"> ' + '<h2>Travel classes</h2>' + 'For the above segments, your flight classes are as follows:' + 'write result here' + '</div>'; main.parentNode.insertBefore(flightClasses, buttons); If anyone could help me, or point me in the right direction to finish this off I'd appreciate it.

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  • Creating a drop-down row in displaytag

    - by bphilipnyc
    I am currently using displaytag for tabular data, but would like to create a "kayak.com-like" interface where when a user clicks a row, the user is shown more details about the particular row without a page refresh. I tried using a decorator to return javascript that would do this. The javascript is executed, but it is only reflected in the column where it was rendered. I am looking to create a new row with the data. e.g.: public class CustomDecorator extends TableDecorator { public String getDetailsRow() { MyObject object = (MyObject)this.getCurrentRowObject(); return "<a onClick=\"myjsfunction(object.getId()); return true\">Details</a>"; } } ...and in the JSP I would have a detailsRow property nested between the display:table tags: <display:column property="detailsRow" sortable="false" /> Any tips on how to create a new row? The solution may be in the way that the javascript is written - I'm not an expert with Javascript, so any tips would be appreciated. Is there a better way to do this with displaytag? I don't know of any explicit integration that displaytag has with javascript (like an "onclick" parameter) either. This is my first question on stackoverflow, btw - so please let me know whether you need more detail.

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  • How to ajax load a parent-child listbox in JQuery/Asp.net MVC popup?

    - by melaos
    hi guys, i'm new to the asp.net mvc. and i have a link which will popup show a 3 panes listbox which allows the user to select country, region and language. and when the user click on the language, this will redirect back to the controller and refresh the page and show the proper localized content. i was thinking of using a jquery dialog/modal to do this but so i try using fancybox for this which will load the hidden div of the three listbox up. unfortunately, on clicking on the first listbox, the page will call a jquery event which will show the populate the 2nd list box in which the lightbox will close. is there a better way to do this? or i'm not using the proper jquery plugin? i was thinking of putting the whole three panes inside a html file and do ajax call to get the content into that page and load the listbox like that and just use the html popup like a normal popup. Any suggestions? i'm stuck, help!!

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  • How do I resolve no swt-cocoa-3557 or swt-cocoa in swt.library.path, java.library.path or the jar fi

    - by ?????
    I can't get a swt application to work on Mac OSX Snow Leopard. Exception in thread "main" java.lang.UnsatisfiedLinkError: no swt-cocoa-3557 or swt-cocoa in swt.library.path, java.library.path or the jar file at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source) at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source) at org.eclipse.swt.internal.C.<clinit>(Unknown Source) at org.eclipse.swt.internal.cocoa.NSThread.isMainThread(Unknown Source) at org.eclipse.swt.graphics.Device.<init>(Unknown Source) at org.eclipse.swt.widgets.Display.<init>(Unknown Source) at org.eclipse.swt.widgets.Display.<init>(Unknown Source) at com.astrobetty.geotag.Hello.main(Hello.java:12) I have added -Dswt.library.path= and -Djava.library.path statements to the "VM arrguments" hand have also tried setting them as variables in the "environment" section of the Eclipse run configuration page. I've verified that my .jar file is at the path I specify. If I look inside the .jar, it seems to contain these libraries: 102 Feb 12 13:21 META-INF 183 Feb 12 13:21 external.xpt 37104 Nov 17 2009 libswt-awt-cocoa-3557.jnilib 287228 Nov 17 2009 libswt-cocoa-3557.jnilib 548252 Nov 17 2009 libswt-pi-cocoa-3557.jnilib 313420 Nov 17 2009 libswt-xulrunner-cocoa-3557.jnilib 136 May 23 22:19 org 13 Feb 12 13:21 version.txt Any ideas on how to get this to work? Is it possible at all?

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  • How do you handle 'SelectedItemChanged' events in a MVVM ViewModel?

    - by Travis
    I have some logic that depends upon two properties being set, as it executes when both properties have a value. For example: private void DoCalc() { if (string.IsNullOrEmpty(Property1) || string.IsNullOrEmpty(Property2)) return; Property3 = Property1 + " " + Property2; } That code would need to be executed every time Property1 or Property2 changed, but I'm having trouble figuring out how to do it in a stylistically acceptable manner. Here are the choices as I see them: 1) Call method from ViewModel I don't have a problem with this conceptually, as the logic is still in the ViewModel - I'm not a 'No code-behind' nazi. However, the 'trigger' logic (when either property changes) is still in the UI layer, which I don't love. The codebehind would look like this: void ComboBox_Property1_SelectedItemChanged(object sender, RoutedEventArgs e) { viewModel.DoCalc(); } 2) Call method from Property Setter This approach seems the most 'pure', but it also seems ugly, as if the logic is hidden. It would look like this: public string Property1 { get {return property1;} set { if (property1 != value) { property1 = value; NotifyPropertyChanged("Property1"); DoCalc(); } } } 3) Hook into the PropertyChanged event I'm now thinking this might be the right approach, but it feels weird to hook into the property changed event in the implementing viewmodel. It would look something like this: public ViewModel() { this.PropertyChanged += new PropertyChangedEventHandler(ViewModel_PropertyChanged); } void ViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e) { if (e.PropertyName == "Property1" || e.PropertyName == "Property2") { DoCalc(); } } So, my question is, if you were browsing through some source code with that requirement, which approach would you prefer to see implemented (and why?). Thanks for any input.

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  • serializing type definitions?

    - by Dave
    I'm not positive I'm going about this the right way. I've got a suite of applications that have varying types of output (custom defined types). For example, I might have a type called Widget: Class Widget Public name as String End Class Throughout the course of operation, when a user experiences a certain condition, the application will take that output instance of widget that user received, serialize it, and log it to the database noting the name of the type. Now, I have other applications that do something similar, but instead of dealing with Widget, it could be some totally random other type with different attributes, but again I serialize the instance, log it to the db, and note the name of the type. I have maybe a half dozen different types and don't anticipate too many additional ones in the future. After all this is said and done, I have an admin interface that looks through these logs, and has the ability for the user to view the contents of this data thats been logged. The Admin app has a reference to all the types involved, and with some basic switch case logic hinged upon the name of the type, will cast it into their original types, and pass it on to some handlers that have basic display logic to spit the data back out in a readable format (one display handler for each type) NOW... all this is well and good... Until one day, my model changed. The Widget class now has deprecated the name attribute and added on a bunch of other attributes. I will of course get type mismatches in the admin side when I try to reconstitute this data. I was wondering if there was some way, at runtime, i could perhaps reflect through my code and get a snapshot of the type definition at that precise moment, serialize it, and store it along with the data so that I could somehow use this to reconstitute it in the future?

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  • WCF Service Exception

    - by Maciek
    Hiya, I'm currently working on an Silverlight 3 project, I'm using 2 machines to test it. "harbinger" is the web server running Win7 + IIS . I've deployed the webpage and the WCF webservice to that machine. I've entered the following url's in my browser : http://harbinger:43011/UserService.svc http://harbinger:43011/UserService.svc?wsdl and got pages load expected contents for both Next I've decided to check if I can call the webservice from my machine, I've added the ServiceReference, executed a call to one of the methods and .... BOOM : System.ServiceModel.CommunicationException was unhandled by user code Message="An error occurred while trying to make a request to URI 'http://harbinger:43011/UserService.svc'. This could be due to attempting to access a service in a cross-domain way without a proper cross-domain policy in place, or a policy that is unsuitable for SOAP services. You may need to contact the owner of the service to publish a cross-domain policy file and to ensure it allows SOAP-related HTTP headers to be sent. This error may also be caused by using internal types in the web service proxy without using the InternalsVisibleToAttribute attribute. Please see the inner exception for more details." StackTrace: at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result) at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result) at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result) at System.ServiceModel.ClientBase`1.ChannelBase`1.EndInvoke(String methodName, Object[] args, IAsyncResult result) at Energy.USR.UserServiceClient.UserServiceClientChannel.EndGetAllUsers(IAsyncResult result) at Energy.USR.UserServiceClient.Energy.USR.UserService.EndGetAllUsers(IAsyncResult result) at Energy.USR.UserServiceClient.OnEndGetAllUsers(IAsyncResult result) at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result) InnerException: System.Security.SecurityException Message="" StackTrace: at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state) at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult) at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result) InnerException: System.Security.SecurityException Message="Security error." StackTrace: at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult) at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState) at System.Net.Browser.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendState) InnerException: Can someone explain what just happened? What do I need to do to avoid this?

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  • C++/CLI managed thread cleanup

    - by Guillermo Prandi
    Hi. I'm writing a managed C++/CLI library wrapper for the MySQL embedded server. The mysql C library requires me to call mysql_thread_init() for every thread that will be using it, and mysql_thread_end() for each thread that exits after using it. Debugging any given VB.Net project I can see at least seven threads; I suppose my library will see only one thread if VB doesn't explicitly create worker threads itself (any confirmations on that?). However, I need clients to my library to be able to create worker threads if they need to, so my library must be thread-aware to some degree. The first option I could think of is to expose some "EnterThread()" and "LeaveThread()" methods in my class, so the client code will explicitly call them at the beginning and before exiting their DoWork() method. This should work if (1) .Net doesn't "magically" create threads the user isn't aware of and (2) the user is careful enough to have the methods called in a try/finally structure of some sort. However, I don't like it very much to have the user handle things manually like that, and I wonder if I could give her a hand on that matter. In a pure Win32 C/C++ DLL I do have the DllMain DLL_THREAD_ATTACH and DLL_THREAD_DETACH pseudo-events, and I could use them for calling mysql_thread_init() and mysql_thread_end() as needed, but there seem to be no such thing in C++/CLI managed code. At the expense of some performance (not much, I think) I can use TLS for detecting the "usage from a new thread" case, but I can imagine no mechanism for the thread exiting case. So, my questions are: (1) could .net create application threads without the user being aware of them? and (2) is there any mechanism I could use similar to DLL_THREAD_ATTACH / DLL_THREAD_DETACH from managed C++/CLI? Thanks in advance.

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  • Ajax actionlinks straight from a DropDownList

    - by Ingó Vals
    I've got a small linkbox on the side of my page that is rendered as a PartialView. In it I have a dropDownlist the should change the routing value of the links in the box but I'm having difficulty doing so. My current plan is to call on something similar to a Ajax.ActionLink to reload the partial view into the with a different parameter based on the value of the dropdown selection. However I'm having multiple problems with this, for example as a novice in using dropdownlists I have no idea how to call on the selected value for example. <%= Html.DropDownList("DropDownList1", new SelectList(Model, "ID", "Name"), "--Pick--", new { AutoPostBack = "true", onchange = "maybe something here" })%> I tried putting in the sys.mvc.AsyncHyperlink into the onchange attribute and that worked except I don't know how to put in the route value for it. Sys.Mvc.AsyncHyperlink.handleClick(this, new Sys.UI.DomEvent(event), { insertionMode: Sys.Mvc.InsertionMode.replace, updateTargetId: 'SmallMenu' } Is there no straight Ajax drop down list that fires events onchange? Any way this is possible? I have later in the Partial view the Ajax actionlinks but they need to have their id's updated by the value in the dropdownlist and if I could do that somehow else I would appreciate a suggestion.

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  • Iterating arrays in a batch file

    - by dboarman-FissureStudios
    I am writing a batch file (I asked a question on SU) to iterate over terminal servers searching for a specific user. So, I got the basic start of what I'm trying to do. Enter a user name Iterate terminal servers Display servers where user is found (they can be found on multiple servers now and again depending on how the connection is lost) Display a menu of options Iterating terminal servers I have: for /f "tokens=1" %%Q in ('query termserver') do (set __TermServers.%%Q) Now, I am getting the error... Environment variable __TermServers.SERVER1 not defined ...for each of the terminal servers. This is really the only thing in my batch file at this point. Any idea on why this error is occurring? Obviously, the variable is not defined, but I understood the SET command to do just that. I'm also thinking that in order to continue working on the iteration (each terminal server), I will need to do something like: :Search for /f "tokens=1" %%Q in ('query termserver') do (call Process) goto Break :Process for /f "tokens=1" %%U in ('query user %%username%% /server:%%Q') do (set __UserConnection = %%C) goto Search However, there are 2 things that bug me about this: Is the %%Q value still alive when calling Process? When I goto Search, will the for-loop be starting over? I'm doing this with the tools I have at my disposal, so as much as I'd like to hear about PowerShell and other ways to do this, it would be futile. I have notepad and that's it. Note: I would continue this line of questions on SuperUser, except that it seems to be getting more into programming specifics.

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  • solr JOIN query

    - by Sfairas
    I need to run a JOIN query on a solr index. I've got two xmls that I have indexed, person.xml and subject.xml. Person: <doc> <field name="id">P39126</field> <field name="family">Smith</field> <field name="given">John</field> <field name="subject">S1276</field> <field name="subject">S1312</field> </doc> Subject: <doc> <field name="id">S1276</field> <field name="topic">Abnormalities, Human</field> </doc> I need to only display information from the person doc but each query should match fields in both person and subject. In the case the query matches only the subject doc I need to display all docs from the person that have a matching id. Is this possible to do without running two seperate queries? Something like a JOIN query would do the job. Any help?

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  • WCF Datacontract, some fields do not deserialize

    - by jhersh
    Problem: I have a WCF service setup to be an endpoint for a call from an external system. The call is sending plain xml. I am testing the system by sending calls into the service from Fiddler using the RequestBuilder. The issue is that all of my fields are being deserialized with the exception of two fields. price_retail and price_wholesale. What am I missing? All of the other fields deserialize without an issue - the service responds. It is just these fields. XML Message: <widget_conclusion> <list_criteria_id>123</list_criteria_id> <list_type>consumer</list_type> <qty>500</qty> <price_retail>50.00</price_retail> <price_wholesale>40.00</price_wholesale> <session_id>123456789</session_id> </widget_conclusion> Service Method: public string WidgetConclusion(ConclusionMessage message) { var priceRetail = message.PriceRetail; } Message class: [DataContract(Name = "widget_conclusion", Namespace = "")] public class ConclusionMessage { [DataMember(Name = "list_criteria_id")] public int CriteriaId { get; set;} [DataMember(Name = "list_type")] public string ListType { get; set; } [DataMember(Name = "qty")] public int ListQuantity { get; set; } [DataMember(Name = "price_retail")] public decimal PriceRetail { get; set; } [DataMember(Name = "price_wholesale")] public decimal PriceWholesale { get; set; } [DataMember(Name = "session_id")] public string SessionId { get; set; } }

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  • How can I line up WPF items in a Horizontal WrapPanel so they line up based on an arbitrary vertical

    - by Scott Whitlock
    I'm trying to create a View in WPF and having a hard time figuring out how to set it up. Here's what I'm trying to build: My ViewModel exposes an IEnumerable property called Items Each item is an event on a timeline, and each one implements ITimelineItem The ViewModel for each item has it's own DataTemplate to to display it I want to display all the items on the timeline connected by a line. I'm thinking a WrapPanel inside of a ListView would work well for this. However, the height of each item will vary depending on the information it displays. Some items will have graphic objects right on the line (like a circle or a diamond, or whatever), and some have annotations above or below the line. So it seems complicated to me. It seems that each item on the timeline has to render its own segment of the line. That's fine. But the distance between the top of the item to the line (and the bottom of the item to the line) could vary. If one item has the line 50 px down from the top and the next item has the line 100 px down from the top, then the first item needs 50 px of padding so that the line segments add up. I think I could solve that problem, however, we only need to add padding if these two items are on the same line in the WrapPanel! Let's say there are 5 items and only room on the screen for 3 across... the WrapPanel will put the other two on the next line. That's ok, but that means only the first 3 need to pad together, and the last 2 need to pad together. This is what's giving me a headache. Is there another approach I could look at?

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  • Unresolved Host Exception Android

    - by Rob Stevenson-Leggett
    I'm trying to call a RESTful web service from an Android application using the following method: HttpHost target = new HttpHost("http://" + ServiceWrapper.SERVER_HOST,ServiceWrapper.SERVER_PORT); HttpGet get = new HttpGet("/list"); String result=null; HttpEntity entity = null; HttpClient client = new DefaultHttpClient(); try { HttpResponse response=client.execute(target, get); entity = response.getEntity(); result = EntityUtils.toString(entity); } catch (Exception e) { e.printStackTrace(); } finally { if (entity!=null) try { entity.consumeContent(); } catch (IOException e) {} } return result; I can browse to address and see the xml results using the Android Emulator browser and from my machine. I have given my app the INTERNET permission. I'm developing with eclipse. I've seen it mentioned that I might need to configure a proxy but since the web service i'm calling is on port 80 this shouldn't matter should it? I can call the method with the browser. Any ideas?

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  • Binding from View-Model to View-Model of a child User Control in Silverlight? 2 sources - 1 target..

    - by andrej351
    Hi there, So i have a UserControl for one of my Views and have another 'child' UserControl inside that. The outer 'parent' UserControl has a Collection on its View-Model and a Grid control on it to display a list of Items. I want to place another UserControl inside this UserControl to display a form representing the details of one Item. The outer / parent UserControl's View-Model already has a property on it to hold the currently selected Item and i would like to bind this to a DependancyProperty on the inner / child UserControl. I would then like to bind that DependancyProperty to a property on the child UserControl's View-Model. I can then set the DependancyProperty once in XAML with a binding expression and have the child UserControl do all its work in its View-Model like it should. The code i have looks like this.. Parent UserControl: <UserControl x:Class="ItemsListView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" DataContext="{Binding Source={StaticResource ServiceLocator}, Path=ItemsListViewModel}"> <!-- Grid Control here... --> <ItemDetailsView Item="{Binding Source={StaticResource ServiceLocator}, Path=ItemsListViewModel.SelectedItem}" /> </UserControl> Child UserControl: <UserControl x:Class="ItemDetailsView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" DataContext="{Binding Source={StaticResource ServiceLocator}, Path=ItemDetailsViewModel}" ItemDetailsView.Item="{Binding Source={StaticResource ServiceLocator}, Path=ItemDetailsViewModel.Item, Mode=TwoWay}"> <!-- Form controls here... --> </UserControl> The selected Item is bound to the DependancyProperty fine. However from the DependancyProperty to the child View-Model does not. It appears to be a situation where there are two concurrent bindings which need to work but with the same target for two sources. Why won't the second (in the child UserControl) binding work?? Is there a way to acheive the behaviour I'm after?? Cheers.

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  • Cannot rollback ransaction with Entity Framework

    - by Luca
    I have to do queries on uncommitted changes and I tried to use transactions, but I found that it do not work if there are exceptions. I made a simple example to reproduce the problem. I have a database with only one table called "Tabella" and the table has two fields: "ID" is a autogenerated integer, and "Valore" is an integer with a Unique constraint. Then I try to run this code: using (TransactionScope scope = new TransactionScope()) { Db1Container db1 = new Db1Container(); try { db1.AddToTabella(new Tabella() { Valore = 1 }); db1.SaveChanges(); } catch { } try { db1.AddToTabella(new Tabella() { Valore = 1 }); db1.SaveChanges(); //Unique constraint is violated here and an exception is thrown } catch { } try { db1.AddToTabella(new Tabella() { Valore = 2 }); db1.SaveChanges(); } catch { } //scope.Complete(); //NEVER called } //here everything should be rolled back Now if I look into the database it should contain no records because the transaction should rollback, instead I find two records!!!! One with Valore=1 and one with Valore=2. I am missing something? It looks like the second call to SaveChanges method rollback its own changes and "deletes" the transaction, then the third call to SaveChanges commits the changes of the first and the third insert (at this point it is like the transaction not exists). I also tried to use SaveChanges(false) method (even without calling AcceptAllChanges method), but with no success: I have the same behaviour. I do not want the transaction to be rolled back automatically by SaveChanges, because I want to correct the errors (for example by user interaction in the catch statement) and make a retry. Can someone help me with this? It seems like a "bug", and it is giving me a really big headache...

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