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• Is it possible to use theme colors in Windows Forms apps?

  - by Yadyn

  I normally make use of System Colors whenever possible when designing Windows Forms applications just so that it'll fit in with the user's preferences. But is it possible to use Theme Colors? I realize that this limits you in several ways (must be running Windows that supports it and has the Themes service running), so I would certainly like it if it could fall back on some other default, but since I'm fairly sure 99% of my users will have it available, I'd like to make use of it if possible. Specifically, for newer Windows versions (Vista and 7), things like hyperlinks have a softer more pastel-ish blue. The old System Colors do not define anything for links and the like, and in general are much more limited (coming from the 95 days) in choices and variety. Though WPF probably has better support, I'm not at liberty to use it. If some third party utility, assembly, or the like is necessary, it would also need to be free to use. I don't need anything that fancy, but in a perfect world I would be able to do something like this: linkLabel1.LinkColor = System.Drawing.ThemeColors.Hyperlink; Am I stuck just using the default Blue (0,0,255) and having them look out of place in Vista and above? I'll even settle for ugly p/invoke interop methods if need be...

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• Implementing BindingList<T>

  - by EtherealMonkey

  I am trying to learn more about BindingList because I believe that it will help me with a project that I am working on. Currently, I have an object class (ScannedImage) that is a subtype of a class (HashedImage) that subtypes a native .Net object (Image). There is no reason why I couldn't move the two subtypes together. I am simply subtyping an object that I had previously constructed, but I will now be storing my ScannedImage object in an RDB (well, not technically - only the details and probably the thumbnail). Also, the object class has member types that are my own custom types (Keywords). I am using a custom datagridview to present these objects, but am handling all changes to the ScannedImage object with my own code. As you can probably imagine, I have quite a few events to handle that occur in these base types. So, if I changed my object to implement INotifyPropertyChanged, would the object collection (implementing BindingList) receive notifications of changes to the ScannedImage object? Also, if Keywords were to implement INotifyPropertyChanged, would changes be accessible to the BindingList through the ScannedImage object? Sorry if this seems rather newbish. I only recently discovered the BindingList and not having formal training in C# programming - am having a difficult time moving forward with this. Also, if anyone has any good reference material, I would be thankful for links. Obviously, I have perused the MSDN Library. I have found a few good links on the web, but it seems that a lot of people are now using WPF and ObservableCollection. My project is based on Winforms and .Net3.5 framework. TIA

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• C# BackgroundWorker skips DoWork and goes straight to RunWorkerCompleted

  - by mr_man

  I'm new with C# so go easy on me! So far - I have a console app that listens for client connections and replies to the client accordingly. I also have a WPF form with a button and a text box. The button launches some code to connect to the server as a BackgroundWorker, which then waits for a response before appending it to the end of the text box. This works great, once. Sometimes twice. But then it kept crashing - turns out that the DoWork block wasn't being called at all and it was going straight to RunWorkerCompleted. Of course, the .result is blank so trying to convert it to a string fails. Is this a rookie mistake? I have tried searching the internet for various ways of saying the above but haven't come across anything useful... This is the code so far: http://pastebin.com/ZQvCFqxN - there are so many debug outputs from me trying to figure out exactly what went wrong. This is the result of the debug outputs: http://pastebin.com/V412mppX Any help much appreciated. Thanks! EDIT: The relevant code post-fix (thanks to Patrick Quirk below) is: public void dorequest(string query) { request = new BackgroundWorker(); request.WorkerSupportsCancellation = true; request.WorkerReportsProgress = true; request.ProgressChanged += request_ProgressChanged; request.DoWork += request_DoWork; request.RunWorkerCompleted += request_RunWorkerCompleted; request.RunWorkerAsync(query); }

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• Unable to cast type isse in silverlight

  - by prince23

  error once i clcik on the button i am getting this error. this is my code <sdk:DataGrid MinHeight="100" x:Name="dgCounty" AutoGenerateColumns="False" VerticalAlignment="Top" IsReadOnly="True" Margin="5,5,5,0" RowDetailsVisibilityChanged="dgCounty_RowDetailsVisibilityChanged" RowDetailsVisibilityMode="VisibleWhenSelected"> <sdk:DataGrid.Columns> <data:DataGridTemplateColumn.CellTemplate> <DataTemplate> <Button Content="+" Click="Button_Click"></Button> </DataTemplate> private void Button_Click(object sender, RoutedEventArgs e) { Button btnExpandCollapse = sender as Button; var Row = DataGridRow.GetRowContainingElement(sender as FrameworkElement); if (Row.DetailsVisibility == Visibility.Collapsed) { Row.DetailsVisibility = Visibility.Visible; } else { Row.DetailsVisibility = Visibility.Collapsed; } if (btnExpandCollapse.Content.ToString() == "+") { btnExpandCollapse.Content = "-"; } else if (btnExpandCollapse.Content.ToString() == "-") { btnExpandCollapse.Content = "+"; } } void dtg_RowDetailsVisibilityChanged(object sender, DataGridRowDetailsEventArgs e) { DataGrid RowDetails = e.DetailsElement as DataGrid if(RowDetails.YourDesiciveFlag = true) { } else { } } } working on this issue from past 3 days any idea how to solve this issue. just going mad on this issue. for expand /collpase in data grid in silverlight. let me know if you people can provide me any code that can solve my issue. thanks in advance prince

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• Displaying Many-To-Many Database relationship in VB.NET 2008 with DataGrid, MS SQL 2008

  - by user337501

  Computer bombed while posting this, couldnt find a duplicate question but if there is one, forgive me. So, I've run into a wall. And rather than use a ladder to avoid it, I'd like go through it. I'm setting up what I can best describe as a many-to-many relationship in a database. To examplify, imagine I have three primary tables: Items, Categories, Sections(nevermind the potential redundancy) Then I have another table, Properties. Items, Categories, and Sections can be associated with many properties. A single property can be associated with one, all, or none of the other tables. The best way I can figure to do this is to have join tables make the relationship. i.e. tblItems----(Foreign Key)----tblItems_To_Properties----(Foreign Key)----tblProperties In this example, tblItems simply has an "ItemID" Primary Key. tblItems_To_Properties has its own Primary Key(tblItems_To_PropertiesID), a Foreign Key to the Item(ItemID) and a Foreign key to the Property(PropertyID). The Properties table simply has its primary key(PropertyID) I hope this example isnt too confusing...if I have to I can find a way to put a diagram up or something. My problem is, I want to display this in a DataGrid using the Master-Detail method(DevExpress GridControl). I use the tblItems as a test, and I can see the Items in the parent view, but in the child view I see(understandably) the join table and that is it. My goal is to make it so the Grid ignores the join table and shows the Properties table as the only child. Any help on this method or insight into another solution would be muuuuuuuch appreciat

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• In JQGrid I want to add a row button that doesnt post back.

  - by snyder

  The buttons I have added to the rows still post back even if I specifiy not to do so in the onclick method of the button (onclick=' return false;'). I supose its the grid doing the post back? I am tring to prevent the postback and show my own custom popup forms. gridComplete: function(){ var ids = $('#jqGridControl1').jqGrid('getDataIDs'); for(var i=0;i < ids.length;i++){ var rowid = ids[i]; de = "<input type='image' title='Delete this record.' src='../images/icn_delete.gif' onclick=' return false;' style='border-width:0px;'/>"; ee = "<input type='image' title='Edit this record.' src='../images/icn_edit.gif' onclick=' return false;' style='border-width:0px;' />"; ve = "<input type='image' title='View related information.' src='../images/house.gif' onclick='return false;' style='border-width:0px;' />"; pe = "<input type='image' title='Print' src='../images/icn_printer.gif' onclick=' return false;' style='border-width:0px;' />"; je = "<input type='image' title='Appointment' src='../images/icn_journal.gif' onclick=' return false;' style='border-width:0px;' />"; se = "<input type='image' title='Select' src='../images/icn_select.gif' onclick=' return false;' style='border-width:0px;' />"; jQuery('#jqGridControl1').jqGrid('setRowData',ids[i],{act:de+ee+ve+pe+je+se}); }

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• ASP.NET MVC and WCF

  - by Michael Stum

  I'm working my way into MVC at the moment, but on my "To learn at some point" list, I also have WCF. I just wonder if WCF is something that should/could be used in an MVC Application or not? The Background is that I want a Desktop Application (.NET 3.5, WPF) interact with my MVC Web Site, and I wonder what the best way to transfer data between the two is. Should I just use special Views/have the controllers return JSON or XML (using the ContentResult)? And maybe even more important, for the other way round, could I just call special controllers? Not sure how Authorization would work in such a context. I can either use Windows Authentication or (if the Site is running forms authentication) have the user store his/her credentials in the application, but I would then essentially create a HTTP Client in my Application. So while MVC = Application seems really easy, Application = MVC does seem to be somewhat tricky and a possible use for WCF? I'm not trying to brute-force WCF in this, but I just wonder if there is indeed a good use case for WCF in an MVC application.

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• Applications on the Web/Cloud the way to go? over Desktop apps?

  - by jiewmeng

  i am currently a mainly web developer, but is quite attracted to the performance and great integration with the OS (eg. Windows 7, Jump Lists, Taskbar Thumbnails, etc) something like WPF/C# can provide to the user, improving workflow and productivity. privacy and performance seems like a major downside of web/cloud apps compared to desktop apps. applications on the cloud/web work on the go, increased popularity of smartphones/netbooks majority of users may not benefit as much from increased performance of desktop apps, eg. internet surfing, word processing, probably benefit more from decreased startup times, lower costs and data on the cloud desktop applications increased performance benefits power users like 3D rendering, HD video/photo editing, gamers (i wonder if such processing maybe offset to cloud processing) integration with OS increases productivity (maybe such features can be adapted to a web version? maybe with a local desktop app to work with Web App API) more control over privacy (maybe fixed by encryption?) local data access (esp. large files) guaranteed and fast (YouTube HD fast enough most of the time) work not affected by intermittent/slow/availability internet connections (i know this is changing tho) what do you think?

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• Searching a list of tuples in python

  - by Niclas Nilsson

  I'm having a database (sqlite) of members of an organisation (less then 200 people). Now I'm trying to write an wx app that will search the database and return some contact information in a wx.grid. The app will have 2 TextCtrls, one for the first name and one for the last name. What I want to do here is make it possible to only write one or a few letters in the textctrls and that will start to return result. So, if I search "John Smith" I write "Jo" in the first TextCtrl and that will return every single John (or any one else having a name starting with those letters). It will not have an "search"-button, instead it will start searching whenever I press a key. One way to solve this would be to search the database with like " SELECT * FROM contactlistview WHERE forname LIKE 'Jo%' " But that seems like a bad idea (very database heavy to do that for every keystroke?). Instead i thought of use fetchall() on a query like this " SELECT * FROM contactlistview " and then, for every keystroke, search the list of tuples that the query have returned. And that is my problem: Searching a list is not that difficult but how can I search a list of tuples with wildcards?

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• How can I make an AdvancedDataGrid re-display its labels when the results of the labelFunction chang

  - by Chris R

  I have an AdvancedDataGrid with a custom label function whose value can change based on other form status (specifically, there's a drop down to choose the time display format for some columns). Right now, I have this labelFunction: internal function formatColumnTime(item: Object, column: AdvancedDataGridColumn): String { var seconds: Number = item[column.dataField]; return timeFormat.selectedItem.labelFunction(seconds); } internal function formatTimeAsInterval(time: Number): String { if (isNaN(time)) return ""; var integerTime: int = Math.round(time); var seconds: int = integerTime % 60; integerTime = integerTime / 60; var minutes: int = integerTime % 60; var hours: int = integerTime / 60; return printf("%02d:%02d:%02d", hours, minutes, seconds); } internal function formatTimeAsFractions(time: Number): String { if (isNaN(time)) return ""; var hours: Number = time / 3600.0; return new String(Math.round(hours * 100) / 100); } ... and the timeFormat object is a combo box with items whose labelFunction attributes are formatTimeAsFractions and formatTimeAsInterval. The columns that have time formats have formatColumnTime as their labelFunction value, because extracting the seconds in that function and passing it in to the formatters made for a more testable app (IMHO). So, when the timeFormat.selectedItem value changes, I want to force my grid to re-calculate the labels of these colums. What method must I call on it? invalidateProperties() didn't work, so that's out.

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• Has anyone used Rational Team Concert (RTC)?

  - by FryGuy

  The company I work for is currently evaluating replacements for SourceSafe, and for various reasons, I think RTC will be chosen. I'm a little scared that we're going to end up with a solution that isn't the best for us in our situation. I've tried researching a little bit about what it is, but all I have been able to find are marketing things, but nothing about how it actually works (any of the paradigms it uses, etc). Our team is around 8 developers and 2 QA people on a single project (and 4-5 more people that would be using it for their independent project). It seems like RTC is targetted for larger teams, but our team is relatively small. Does anyone has experience using RTC in a smaller team? The project that would be using it is a .NET/WPF application, so we would be using primarily Visual Studio. Is the Visual Studio integration any good, or are we stuck having to have Eclipse open on top of Visual Studio? Personally, I have been using Bazaar as my personal source control (and checking out/into sourcesafe from a branch), as well as on personal projects. Does RTC incorporate features of "third generation" version control systems, such as first class branching/merging and changesets rather than file changes, and good visualization of where changes come from? Also, what are the general pros and cons for it?

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• LINQ to SQL - Tracking New / Dirty Objects

  - by Joseph Sturtevant

  Is there a way to determine if a LINQ object has not yet been inserted in the database (new) or has been changed since the last update (dirty)? I plan on binding my UI to LINQ objects (using WPF) and need it to behave differently depending whether or not the object is already in the database. MyDataContext context = new MyDataContext(); MyObject obj; if (new Random().NextDouble() > .5) obj = new MyObject(); else obj = context.MyObjects.First(); // How can I distinguish these two cases? The only simple solution I can think of is to set the primary key of new records to a negative value (my PKs are an identity field and will therefore be set to a positive integer on INSERT). This will only work for detecting new records. It also requires identity PKs, and requires control of the code creating the new object. Is there a better way to do this? It seems like LINQ must be internally tracking the status of these objects so that it can know what to do on context.SubmitChanges(). Is there some way to access that "object status"? Clarification Apparently my initial question was confusing. I'm not looking for a way to insert or update records. I'm looking for a way, given any LINQ object, to determine if that object has not been inserted (new) or has been changed since its last update (dirty).

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• Telerik Silverlight RadComboBox Selected Item

  - by Chirag

  i am customize telerik Datapager control in that control create one resource file and add one combobox for change page size of grid <UserControl.Resources> ....... <telerik:RadComboBox x:Name="CmbPageSize" MinWidth="40" telerik:StyleManager.Theme="{StaticResource Theme}" ItemsSource="{Binding Path=BindPageSize, Mode=TwoWay}" SelectedItem="{Binding Path=DataPagerPageSize_string, Mode=TwoWay}"></telerik:RadComboBox> ....... Bind a combo with public string DataPagerPageSize_string { get { if (_DataPagerPageSize_string == null || _DataPagerPageSize_string == string.Empty) { //DatapagerIndex = 1; return DefaultPageSize.ToString(); } return _DataPagerPageSize_string; } set { _DataPagerPageSize_string = value; OnPropertyChanged("_DataPagerPageSize_string"); } } public List<string> BindPageSize { get { List<string> Pagerdata = new List<string>(); Pagerdata.Add("10"); Pagerdata.Add("20"); Pagerdata.Add("50"); Pagerdata.Add("100"); Pagerdata.Add("250"); Pagerdata.Add("500"); Pagerdata.Add("750"); Pagerdata.Add("1000"); Pagerdata.Add("1500"); Pagerdata.Add("2000"); Pagerdata.Add("Automatic"); Pagerdata.Add("All"); return Pagerdata; } } this is working fine in case of if i select a value from combobox but i wan to change it from code behind Like EVP.DataPagerPageSize_string = "All"; this thigs works fine but Combobox display me a old value; if i will check a property then it show me a newly set value but combobox not select newly value

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• how to store JSON into POJO using Jackson

  - by user2963680

  I am developing a module where i am using rest service to get data. i am not getting how to store JSON using Jackson and store it which has Queryparam also. Any help is really appreciated as I am new to this.I am trying to do server side filtering in extjs infinte grid which is sending the below request to rest service. when the page load first time, it sends http://myhost/mycontext/rest/populateGrid?_dc=9999999999999&page=1&start=0&limit=500 when you select filter on name and place, it sends http://myhost/mycontext/rest/populateGrid?_dc=9999999999999&filter=[{"type":"string","value":"Tom","field":"name"},{"type":"string","value":"London","field":"Location"}]&page=1&start=0&limit=500 I am trying to save this in POJO and then sending this to database to retrieve data. For this on rest side i have written something like this @Provider @Path("/rest") public interface restAccessPoint { @GET @Path("/populateGrid") @Produces({MediaType.APPLICATION_JSON}) public Response getallGridData(FilterJsonToJava filterparam,@QueryParam("page") String page,@QueryParam("start") String start,@QueryParam("limit") String limit); } public class FilterJsonToJava { @JsonProperty(value ="filter") private List<Filter> data; .. getter and setter below } public class Filter { @JsonProperty("type") private String type; @JsonProperty("value") private String value; @JsonProperty("field") private String field; ...getter and setters below } I am getting the below error The following warnings have been detected with resource and/or provider classes: WARNING: A HTTP GET method, public abstract javax.ws.rs.core.Response com.xx.xx.xx.xxxxx (com.xx.xx.xx.xx.json.FilterJsonToJava ,java.lang.String,java.lang.String,java.lang.String), should not consume any entity. com.xx.xx.xx.xx.json.FilterJsonToJava, and Java type class com.xx.xx.xx.FilterJsonToJava, and MIME media type application/octet-stream was not found [11/6/13 17:46:54:065] 0000001c ContainerRequ E The registered message body readers compatible with the MIME media type are: application/octet-stream com.sun.jersey.core.impl.provider.entity.ByteArrayProvider com.sun.jersey.core.impl.provider.entity.FileProvider com.sun.jersey.core.impl.provider.entity.InputStreamProvider com.sun.jersey.core.impl.provider.entity.DataSourceProvider com.sun.jersey.core.impl.provider.entity.RenderedImageProvider */* -> com.sun.jersey.core.impl.provider.entity.FormProvider ...

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• XamlWriter fails to serialize objects in WinForms app

  - by Eddie

  Apparently XamlWriter doesn't works correctly in a WinForms application. XamlWriter uses MarkupWriter.GetMarkupObjectFor(object obj). I suppose that there's a problem to determine the full list of properties to serialize. var ar = new AssemblyReference(AppDomain.CurrentDomain.GetAssemblies().First()); var str = XamlWriter.Save(ar); Running an ASP.NET or WPF application I got this result: <AssemblyReference AssemblyName="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" HintPath="file:///c:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll" SpecificVersion="False" xmlns="clr-namespace:Ivolutia.TypeModel;assembly=ivoTypeModel" /> But running the same code in a WinForms application I got this: <AssemblyReference xmlns="clr-namespace:Ivolutia.TypeModel;assembly=ivoTypeModel" /> this is the class definition: public class AssemblyReference : DependencyObject { public string AssemblyName { get; set; } public string HintPath { get; set; } public bool SpecificVersion { get; set; } public AssemblyReference() { } public AssemblyReference(Assembly assembly) { AssemblyName = assembly.FullName; HintPath = assembly.CodeBase; } public override string ToString() { return AssemblyName; } }

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• Positioning SVG Elements

  - by Rob Wilkerson

  In the course of toying with SVG for the first time (using the Raphael library), I've run into a problem positioning dynamic elements on the canvas in such a way that they're completely contained within the canvas. What I'm trying to do is randomly position n words/short phrases. Since the text is variable, its position needs to be variable as well so what I'm doing is: Initially creating the text at point 0,0 with no opacity. Checking the width of the drawn text element using text.getBBox().width. Setting a new x coordinate as Math.random() * (canvas_width - ( text_width/2 ) - pad). Altering the x coordinate of the text to the newly set value (text.attr( 'x', x ) ). Setting the opacity attribute of the text to 1. I'll be the first to admit that my math acumen is limited, but this seems pretty straightforward. Somehow, I still end up with text running off beyond the right edge of my canvas. For simplicity above, I removed the bit that also sets a minimum x value by adding it to the Math.random() result. It is there, though, and I see the same problem on the leading edge of the canvas. My understanding (such as it is), is that the Math.random() bits would generate a number between 0 and 1 which could then be multiplied by some number (in my case, the canvas width - half of the text width - some arbitrary padding) to get the outer bound. I'm dividing the width of the text in half because its position on the grid is set at its center. I hope I've just been staring at this for too long, but is my math that rusty or am I misunderstanding something about the behavior of Math.random(), SVG, text or anything else that's under the hood of this solution?

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• rails + sheevaplug = rails home development server and more

  - by microspino

  Hello I'd like to build a "Rails Brick" using a Sheevaplug from Marvell (O.S. is Ubuntu out of the box but You can install other distributions on It). It will be a home server and a silent, low cost (99$) low energy development machine. I'd like to add rails RVM, lot of gems, git-based heroku like deployment, passenger + nginx. This way I could have a portable server with a complete development environment and maybe I could find a hosting company where I can co-locate a grid of this devices or I can sell It as a simple little server for 10 or less users offices, with some centralized rails services (I think to a CMS, a BLOG, a WIKI, calendar or whatever this little jewel could afford). The usb port could make It a print server too or a UMTS link to the web via HUAWEI like usb UMTS keys. Can you give me some hint about: Is this project a crazy-close-to-failure idea? Why? which gem would You include? which rails open source app would you suggest? I have already an Excito Bubba Server at home, I saw the TonidoPlug so It came up in my mind to build something similiar but Rails based (Bubba is PHP based, TonidoPlug I don't know but It does not seems a Rails thing).

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• MYSQL Merging 2 results into 1 table

  - by AlphaRomeo69

  Im building a c# program and am currently stuck at fetching data from MYSQL database and bind them to a grid view. I had been researching for a few days now but to no avail. I have 4 table in the database. table 1 - alpha table 2 - bravo table 3 - charlie table 4 - delta attributes of alpha (id, type, user, role ) attributes of bravo (id, type, date, user) attributes of charlie (id,type, cat, doneby, comment) atttibutes of delta (id,type, cat, doneby) * the pk of alpha and bravo is (id) * the pk of charlie and delta is (id, type) i did a query1 before by inner joinning alpha, bravo and charlie which leads to the sucessful result of (id, type, date, user, role, cat, doneby, comment) and i also did a query2 before by inner joinning alpha, bravo and delta which leads to the sucessful result of (id, type, date, user, role, cat, doneby) Right now, im trying to built a query3 which will merge the result from query1 and query2 together. the result of my attempts leads to (id, type, date, user, role, cat, doneby, comment,id, type, date, user, role, cat, doneby) As i do not want the repeated columns, I would like to seek advice on how to get the result to become like the one below by placing the records as a new tuple in the result table. (id, type, date, user, role, cat, doneby, comment) Thanks! P.S: the PK would not pose a problem due to (id, type)

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• Finding string in php

  - by Roshan

  I have a content and i want to search a keyword in that content. Content When charting multiple data series, or just to improve the appearance of your charts, you can control the fill for each series in the chart or each item in a series. The fill lets you specify a pattern that defines how Flex draws the chart element. You also use fills to specify the background colors of the chart or bands of background colors defined by the grid lines. Fills can be solid or can use linear and radial gradients. A gradient specifies a gradual color transition in the fill color therefore. NOw, if the keyword we are searching is "When", it is the starting word so should display as "When charting multiple data ..........." If the keyword is "draws" , it lies in middle so should be displayed as ".... how Flex draws....." If the kewyword is "therefore", it is in the last position so should be displayed as ".........transition in the fill color therefore." Can anyone help me out how to do this in php server script?

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• InvalidCastException in DataGridView

  - by Max Yaffe

  (Using VS 2010 Beta 2 - .Net 4.0 B2 Rel) I have a class, MyTable, derived from BindingList where S is a struct. S is made up of several other structs, for example: public class MyTable<S>:BindingList<S> where S: struct { ... } public struct MyStruct { public MyReal r1; public MyReal r2; public MyReal R1 {get{...} set{...}} public MyReal R2 {get{...} set{...}} ... } public struct MyReal { private Double d; private void InitFromString(string) {this.d = ...;} public MyReal(Double d) { this.d = d;} public MyReal(string val) { this.d = default(Double); InitFromString(val);} public override string ToString() { return this.real.ToString();} public static explicit operator MyReal(string s) { return new MyReal(s);} public static implicit operator String(MyReal r) { return r.ToString();} ... } OK, I use the MyTable as a binding source for a DataGridView. I can load the data grid easily using InitFromString on individual fields in MyStruct. The problem comes when I try to edit a value in a cell of the DataGridView. Going to the first row, first column, I change the value of the existing number. It gives an exception blizzard, the first line of which says: System.FormatException: Invalid cast from 'System.String' to 'MyReal' I've looked at the casting discussions and reference books but don't see any obvious problems. Any ideas?

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• Access to multiple ItemRenderers within an AdvancedDataGrid

  - by user310340

  I've create an AdvancedDataGrid where most of the cell are based on an ItemRenderer. The custom ItemRenderer (SoundBox) extends VBox. This custom component allow for simple changes in the background color based on user clicking on a cell. Here is the snippet of the AdvancedDataGrid (nothing too advanced): <mx:AdvancedDataGrid id="fsfw" dataProvider="{fsfWordList}" sortableColumns="false" > <mx:groupedColumns> <mx:AdvancedDataGridColumn width="35" dataField="wordcount" headerText=" "/> <mx:AdvancedDataGridColumn id="myWord" width="150" headerText="TEST ITEMS"> <mx:itemRenderer> <mx:Component> <components:SoundBox width="100%" letterSound="{data.word}" /> </mx:Component> </mx:itemRenderer> </mx:AdvancedDataGridColumn> <mx:AdvancedDataGridColumn width="200" headerText="Correct / 2 points" dataField="sound1"> <mx:itemRenderer> <mx:Component> <components:SoundBox width="100%" letterSound="{data.sound1}" pointColumn="2"/> </mx:Component> </mx:itemRenderer> </mx:AdvancedDataGridColumn> </mx:groupedColumns> </AdvancedDataGrid> What I'm trying to do is change the background color of (let's just say I have one row of data) row1, cell1 to green when the user clicks on cell3 of row1. I'm unsure as to how I get access to those items (ItemRenderer/SoundBox) within the Grid. Any Ideas? THX!

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• Can NSCollectionView autoresize the width of its subviews to display one column

  - by littlecharva

  Hi, I have an NSCollectionView that contains a collection of CustomViews. Initially it tiled the subviews into columns and rows like a grid. I then set the Columns property in IB to 1, so now it just displays them one after another in rows. However, even though my CustomView is 400px wide, it's set to autoresize, the NSCollectionView is 400px wide, and it's set to 1 column, the subviews are drawn about 80px wide. I know I can get around this by calling: CGFloat width = [collectionView bounds].size.width; NSSize size = NSMakeSize(width, 85); [collectionView setMinItemSize:size]; [collectionView setMaxItemSize:size]; But putting this code in the awakeFromNib method of my WindowController only sets the correct width when the program launches. When I resize the window (and the NSCollectionView autoresizes as I've specified), the CustomViews stay at their initially set width. I'm happy to take care of resizing the subviews myself if need be, but I'm quite new to Cocoa and can't seem to find any articles explaining how to do such a thing. Can someone point me in the right direction? Anthony

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• How to speed up marching cubes?

  - by Dan Vinton

  I'm using this marching cube algorithm to draw 3D isosurfaces (ported into C#, outputting MeshGeomtry3Ds, but otherwise the same). The resulting surfaces look great, but are taking a long time to calculate. Are there any ways to speed up marching cubes? The most obvious one is to simply reduce the spatial sampling rate, but this reduces the quality of the resulting mesh. I'd like to avoid this. I'm considering a two-pass system, where the first pass samples space much more coarsely, eliminating volumes where the field strength is well below my isolevel. Is this wise? What are the pitfalls? Edit: the code has been profiled, and the bulk of CPU time is split between the marching cubes routine itself and the field strength calculation for each grid cell corner. The field calculations are beyond my control, so speeding up the cubes routine is my only option... I'm still drawn to the idea of trying to eliminate dead space, since this would reduce the number of calls to both systems considerably.

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• Paging with Find using Active Record

  - by Brian Rizzo

  I can't seem to find an answer to this question or a good example of how to accomplish what I am trying to do. I'm sure it's been posted or explained somewhere, but I am having trouble finding the exact solution I need. I am using ActiveRecord in Subsonic 3.0.0.3. When I do something like recordset = VehicleModel.Find(x => x.Model.StartsWith(SearchText)); I get back an IList of VehicleModel objects (or more simply a recordset), this is fine until I return too many records. I also cannot order the returned set of records (my grid will do this fine, but i'm sure it will be too slow if i have too many records). Being that Find is returning an IList there isn't much that I can run directly against this (again I may be overlooking something simple so please don't kill me). My question is can someone explain how to find data like i am above, sort it and get a page of data where a page is of size n? Am I going about this wrong? Am I even close to being on the right track?

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• When does MSBuild set the $(ProjectName) property?

  - by bwerks

  I'm fairly new to MSBuild, and I've done some customization on a Wpf project file that I'm building both in VS2010 and TFS2010. I've customized the output path as follows: <OutputPath Condition=" '$(TeamBuildOutDir)' == '' ">$(SolutionDir)build\binaries\$(ProjectName)\$(Configuration)\$(Platform)</OutputPath> <OutputPath Condition=" '$(TeamBuildOutDir)' != '' ">$(TeamBuildOutDir)binaries\$(ProjectName)\$(Configuration)\$(Platform)</OutputPath> This allows me to build to a centralized binaries directory when building on the desktop, and allows TFS to find the binaries when CI builds are running. However, it seems that in both cases, the $(ProjectDir) property is evaluating to '' at buildtime, which creates strange results. Doing some debugging, it appears as if $(ProjectName) is set by the time BeforeBuild executes, but that my OutputPath property is evaluating it prior to that point. <ProjectNameUsedTooEarly Condition=" '$(ProjectName)' == '' ">true</ProjectNameUsedTooEarly> The preceeding property is in the same property group as my OutputPath property. In the BeforeBuild target, $(ProjectNameUsedTooEarly) evaluates to true, but $(ProjectName) evaluates to the project name as normal by that point. What can I do to ensure that $(ProjectName) has got a value when I use it? edit: I just used Attrice's MSBuild Sidekick to debug through my build file, and in the very first target available for breakpoint (_CheckForInvalidConfigurationAndPlatform) all the properties seem to be set already. ProjectName is already set correctly, but my OutputPath property has already been set using the blank value of ProjectName.

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