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• ASP.NET: Dynamically enable or disable RequiredFieldValidator based on value of DropDownList

  - by Jeremy

  I have an ASP.NET form with three text inputs, one each for "Work Phone", "Home Phone" and "Cell Phone". Each of these text inputs has a RequiredFieldValidator associated with it. I also have a DropDownList where the user can select the preferred phone type. I want to only require the field that is selected in the DropDownList. For example, if the user selects "Work Phone" from the DropDownList, I want to disable the RequiredFieldValidator for "Home Phone" and "Cell Phone", thereby only making the "Work Phone" field required. I have a method that enables and disables these validators based on the value of the DropDownList, but I cannot figure out when to call it. I want this method to run before the validation takes place on the page. How would I do that? Let me know if you need any more information. Thanks.

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• Component based game engine design

  - by a_m0d

  I have been looking at game engine design (specifically focused on 2d game engines, but also applicable to 3d games), and am interested in some information on how to go about it. I have heard that many engines are moving to a component based design nowadays rather than the traditional deep-object hierarchy. Do you know of any good links with information on how these sorts of designs are often implemented? I have seen evolve your hierarchy, but I can't really find many more with detailed information (most of them just seem to say "use components rather than a hierarchy" but I have found that it takes a bit of effort to switch my thinking between the two models). Any good links or information on this would be appreciated, and even books, although links and detailed answers here would be preferred.

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• Display Time Based Gannt charts using JavaScript

  - by Hari

  Hi All, We are using fusion charts for time based gantt charts. But these charts are not getting displayed as they require flash plug-in which is not supproted by iPhone. So I'm looking for pure javascript charts to get the same type of charts but I have not found any! I would appreciate if you can point me to right direction. If there are no such links then ,please let me know how we can create these type of charts using JS. I'm looking for following type of charts http://www.fusioncharts.com/widgets/Gallery/Gantt11.html?width=650&height=490 Thanks, Hari

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• WPF - DataGrid Column's ToolTip visibility based on the column's data length

  - by S.C.Vidhya

  In my application, i have tried to implement the visibility of tooltip based on the dataGrid Column's text length by using a converter. I am facing some problems in displaying the toolTip text. In the ToolTip, TextBlock's text binding is not working. If its binded with some hard coded strings, it works fine. Here below is the code that i have added for the grid column... <Custom:DataGridTemplateColumn.CellTemplate> <DataTemplate> <TextBlock Text="{Binding Text}"> <TextBlock.ToolTip> <ToolTip DataContext="{Binding Path=PlacementTarget, RelativeSource={x:Static RelativeSource.Self}}" Visibility="{Binding Converter={StaticResource ToolTipVis}}"> <TextBlock Text="{Binding Text}"> </ToolTip> </TextBlock.ToolTip> </TextBlock> </DataTemplate> </Custom:DataGridTemplateColumn.CellTemplate>

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• Calculated control on subform based on current record

  - by rtochip

  I have the following: main form "customer" from a "customer" table. subform "invoices" with fields "invoice date", "invoice amount" "customer id" etc. from a table "invoices" whenever user clicks or goes to a record in the "invoices" sub form. I would like a "total so far" control to calculate the sum of the "invoices amount" up until the date of the current record being "clicked" or selected. i.e. for customer microsoft with invoices: 1) may 2 09, $150 2) may 3 09, $200 3) may 4 09, $500 If user clicks on record 2), "total so far" should show $350 If user clicks on record 1), "total so far" should show $150 If user clicks on record 3), "total so far" should show $850 Currently, I am using DSum function on an event "OnCurrent" in the subform "invoices" to set the "total so far" value. Is this method slow, inefficient? Any other simpler,cleaner,more elegant,faster, efficient method using ms access features? I want the "invoices" subform to show ALL the invoices for this customer no matter which record is clicked.

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• How to set focus to a textbox on page load event

  - by Kalpana

  I am trying to set focus to the text box on page load event. I tried many solutions by referring the element id, but couldn't able to focus the element. Later when I inspect the element using firebug I found for the same element the id changes in different execution. I am looking for the simplest solution using javascript or jquery to achieve this <h:form id="form"> <rich:dataTable value="#{books}" var="book"> <ui:repeat value="#{authors}" var="author"> <h:inputText value="#{author.name}"/> </ui:repeat> </rich:dataTable> </h:form>

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• Winforms role based security limitations

  - by muhan

  I'm implementing role based security using Microsoft's membership and role provider. The theoretical problem I'm having is that you implement a specific role on a method such as: [PrincipalPermissionAttribute(SecurityAction.Demand, Role="Supervisor")] private void someMethod() {} What if at some point down the road, I don't want Supervisors to access someMethod() anymore? Wouldn't I have to change the source code to make that change? Am I missing something? It seems there has to be some way to abstract the relationship between the supervisors role and the method so I can create a way in the application to change this coupling of role permission to method. Any insight or direction would be appreciated. Thank you.

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• UITextField valueDidChange-Event

  - by Infinite

  Is there a way to catch a "valueDidChange"-Event for a Textfield? oO I've got a modalView with an UITextField. When the UITextField is empty, the "Done"-Button in the NavigationBar should be disabled and when there is Text entered, it should become enabled. Right now the only way to accomplish this by using the "textFieldShouldReturn"-Method. This works but is simply horrible for usability. Isn't there a way to check the requirements every time a letter is being entered or removed?

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• C# Dynamically created LinkButton Command Event Handler

  - by spdevsolutions

  So I have a weird situation here... I have an System.Web.UI.WebControls.WebParts.EditorPart class. It renders a "Search" button, when you click this button, it's clickHandler method does a DB search, and dynamically creates a LinkButton for each row it returns, sets the CommandName and CommandArgument properties and adds a CommandEventHandler method, then adds the LinkButton control to the page. The problem is, when you click a LinkButton, its CommandEventHandler method is never called, it looks like the page just posts back to where it was before the ORIGINAL "Search" button was pressed. I have seen postings saying that you need to add the event handlers in OnLoad() or some other early method, but my LinkButtons haven't even been created until the user tells us what to search for and hits the "Search" button... Any ideas on how to deal with this? Thanks!

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• Calling notifyDataSetChanged doesn't fire onContentChanged event of SimpleCursorAdapter

  - by Pentium10

  I have this scenario onResume of an activity: @Override protected void onResume() { if (adapter1!=null) adapter1.notifyDataSetChanged(); if (adapter2!=null) adapter2.notifyDataSetChanged(); if (adapter3!=null) adapter3.notifyDataSetChanged(); super.onResume(); } Adapter has been defined as: public class ListCursorAdapter extends SimpleCursorAdapter { Cursor c; /* (non-Javadoc) * @see android.widget.CursorAdapter#onContentChanged() */ @Override protected void onContentChanged() { // this is not called if (c!=null) c.requery(); super.onContentChanged(); } } And the onContentChanged event is not fired, although the onResume and the call to the adapter is issued. What is wrong?

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• WCF Data Services consuming data from EF based repository

  - by John Kattenhorn

  We have an existing repository which is based on EF4 / POCO and is working well. We want to add a service layer using WCF Data Services and looking for some best practice advice. So far we have developed a class which has a IQueryable property and the getter triggers the repository 'get all users' method. The problem so far have been two-fold: 1) It required us to decorate the ID field of the poco object to tell data service what field was the id. This now means that our POCO object is not 'pure'. 2) It cannot figure out the relationships between the objects (which is obvious i guess). I've now stopped this approach and i'm thinking that maybe we should expose the OBjectContext from the repository and use more 'automatic' functionality of EF. Has anybody got any advice or examples of using the repository pattern with WCF Data Services ?

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• Cygwin socket & thread & other programming issues (some question about Cygwin)

  - by SjB

  I have some question about cygwin : Can I use Cygwin develop socket based code? Does Cygwin have read() and write() functions that work with file descriptors? Can I use Pthread library in Cygwin? Does code that compiles in Cygwin also compile in Linux without any change or with little change? Will an executable file that built by Cygwin run in Linux ? Why does Cygwin not need the linker option -lpthread when I use pthread library? why in #include <iostream> don't I need to use using namespace std; ? Can I work with QT in Cygwin? If so, How?

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• Setting a WebControls TabIndex based on the ControlId of another control

  - by Daniel Ballinger

  I have an ASP.NET Webforms site that is regularly having features added. The majority of time a new WebControl is added to the page and I need to increment the TabIndex to all subsequent controls on the page. I'd prefer a more robust solution than choosing an arbitrary gap between the initial assigned tab indexes. Setting the tab indexes using the designer tab order functionality is one option but I'd prefer to stay in the source view. Ideally, if I had three check boxes I'd like to be able to define the tabindex based off the previous controls tabindex. Then I'd only need to insert the new control and change one existing control. <asp:CheckBox ID="checkBoxA" runat="server" TabIndex="0"/> <asp:CheckBox ID="checkBoxB" runat="server" TabIndexAfterControlId="checkBoxA"/> <asp:CheckBox ID="checkBoxC" runat="server" TabIndexAfterControlId="checkBoxB"/> My first thought was to extend System.Web.UI.WebControls.WebControl with a new property, but extension properties aren't supported.

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• lambda expression based reflection vs normal reflection

  - by bitbonk

  What is the difference between normal reflection and the reflection that can be done with lambda expressions such as this (taken form build your own MVVM): public void NotifyOfPropertyChange<TProperty>(Expression<Func<TProperty>> property) { var lambda = (LambdaExpression)property; MemberExpression memberExpression; if (lambda.Body is UnaryExpression) { var unaryExpression = (UnaryExpression)lambda.Body; memberExpression = (MemberExpression)unaryExpression.Operand; } else memberExpression = (MemberExpression)lambda.Body; NotifyOfPropertyChange(memberExpression.Member.Name); } Is the lambda based reflection just using the normal reflection APIs internally? Or is this something significantly different. What is ther perfomance difference?

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• JQuery Click Event Problem

  - by hari

  Im creating modal popup using jquery. Im firing the modal pop up through button click event and the corresponding code here $(document).ready(function () { $("#Button1").click(function () { el = document.getElementById("overlayDiv"); el.style.visibility = "visible"; el1 = document.getElementById("progress"); el1.style.visibility = "visible"; el2 = document.getElementById("image"); el2.style.visibility = "hidden"; }); }); This works when I click the button at first, after that it doesnt works. Thanks, Hari.

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• Consuming "Event Tracing for Windows" events

  - by Paul Baker

  An answer to this question has led me to look into using "Event Tracing for Windows" for our tracing needs. I have come across NTrace, which seems to be a good way to produce ETW events from C# code (using the XP-compatible "classic provider" model). However, I am unable to find an easy way to consume these events - to see them in real-time and/or log them to a file. The only way I have found is that described in the NTrace documentation: using a tool which is only available as part of the Windows DDK. In the case of a complex problem in the field, we may need to ask the user to produce a file containing a trace. We can't ask users to download the DDK or carry out a number of complex operations in order to do this. Is there a straightforward, user-friendly way to log ETW events to a file? Also, is it possible for someone to consume ETW events on Windows Vista/7 if they are not running as administrator?

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• how to handle exceptions in ejb 3 based soap webservice

  - by Alexandre GUIDET

  Hi, I am currently developing an EJB3 based SOAP webservice and I wonder what are the best practices to handles uncatched exceptions and return a well formated SOAP response to the client. example: @WebMethod public SomeResponse processSomeService( @WebParam(name = "someParameters") SomeParameters someParameters) { // the EJB do something with the parameters // and retrieve a response fot the client SomeResponse theResponse = this.doSomething(someParameters); return theResponse; } Do I have to catch generic exception like: @WebMethod public SomeResponse processSomeService( @WebParam(name = "someParameters") SomeParameters someParameters) { // the EJB do something with the parameters // and retrieve a response to return to the client try { SomeResponse theResponse = this.doSomething(someParameters); } catch (Exception ex) { // log the exception logger.log(Level.SEVERE, "something is going wrong {0}", ex.getMessage()); // get a generic error response not to let the // technical reason going to the client SomeResponse theResponse = SomeResponse.createError(); } return theResponse; } Is there some kind of "best practice" in order to achieve this ? Thank you

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• Log response-time in restlet-based webservice

  - by amarillion

  What is the simplest way to log the response-time for a restlet-based webservice? I want to make sure that our webservice has a reasonable response time. So I want to be able to keep an eye on response times, and do something about the requests that take too long. The closest thing I could find is this recipe: http://www.naviquan.com/blog/restlet-cookbook-log, it explains how to change the log format. But there doesn't seem to be a parameter for response times, so probably a completely different approach is needed.

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• Override Javascript Function Based on Passed Parameters

  - by George

  Is it possible to override a function based on the number of parameters that you are passing into it? For instance: function abc(name) { document.write ('My name is' + name); } function abc(name,friend) { document.write ('My name is' + name + 'and my best friend\'s name is' + friend); } So in the HTML if I just called abc(george) it would use the first version of the function, but if I called abc(george,john) it would use the second version. There may be other ways to accomplish the example I used, but I'm just wondering if the concept is sound in javascript.

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• Android GridView - update View based on position

  - by Chris

  I have a GridView, using a custom adapter (myAdapter extends BaseAdapter), where each item in the grid holds an ImageButton. getView() is working fine. However, from elsewhere in my code, how can I update the image (setImageResource) for one particular item in the grid based on its position in the GridView? So far, I've added this to my adapter class: public void changeImage() { Log.d(TAG, "Image change"); this.ImageButton.setImageResource(R.drawable.newImage); } And would like to write something like this: mygridview.getItemIdAtPosition(20).changeImage(); (doesn't compile).

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• Add onchange event to a "locked" field in Dynamics CRM 4

  - by Evgeny

  I'm customising Dynamics CRM 4 and would like to modify the Form for the Case entity to add some JavaScript to the onchange event for the Knowledge Base Article lookup field (kbarticleid_ledit). However, when I click Change Properties for that field I get an error message: This field belongs to a locked section and cannot have its properties modified. How can I get around this and edit it? Is there a workaround similar to customizing the Article view? Or can I hack the DB somehow to "unlock" that field?

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• TCL array values updation based on command line argument

  - by Raj

  Hi, I am trying to substitute variable value inside array so as to update array values based on command line inputs. e.g. I am receiving IP address as command line argument for my TCL script and trying to update commands with recvd IP value. My array is: array set myArr { 1 myCmd1("192.268.2.1","abc.txt") 2 myCmd2("192.268.2.1","xyz.txt") 3 myCmd3("192.268.2.1","klm.txt") } Here, "192.268.2.1" will actually be supplied as command line argument. I tried doing array set myArr { 1 myCmd1($myIP,"abc.txt") 2 myCmd2($myIP,"xyz.txt") 3 myCmd3($myIP,"klm.txt") } and other combinations like ${myIP}, {[set $myIP]} but none is working. Thanks in advance for any help/inputs.

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• Trying to issue a mouseclick event on a QWebElement in QWebView QtWebKit

  - by Bad Man

  I'm trying to send a mouse click event on a certain element in the QtWebKit DOM but I'm obviously doing it wrong: QWebElement el=this->page()->mainFrame()->findFirstElement("input[type=submit]"); el.setFocus(); QMouseEvent pressEvent(QMouseEvent::MouseButtonPress, el.geometry().center(), Qt::MouseButton::LeftButton, Qt::LeftButton, Qt::NoModifier); QCoreApplication::sendEvent(this->page()->mainFrame(), &pressEvent); QMouseEvent releaseEvent(QMouseEvent::MouseButtonRelease, el.geometry().center(), Qt::MouseButton::LeftButton, Qt::LeftButton, Qt::NoModifier); QCoreApplication::sendEvent(this->page()->mainFrame(), &releaseEvent); Any ideas? (p.s. I am extending QWebView if it wasn't obvious)

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• Hierarchy based aggregation

  - by Ganapathy Subramaniam

  I have a hierarchy table in SQL Server 2005 which contains employees - managers - department - location - state. Sample table for hierarchy table: ID Name ParentID Type 1 PA NULL 0 (group) 2 Pittsburgh 1 1 (subgroup) 3 Accounts 2 1 4 Alex 3 2 (employee) 5 Robin 3 2 6 HR 2 1 7 Robert 6 2 Second one is fact table which contains employee salary details ID and Salary. Sample data for fact table: ID Salary 4 6000 5 5000 7 4000 Is there any good to way to display the hierarchy from hierarchy table with aggregated sum of salary based on employees. Expected result is like Name Salary PA 15000 (Pittsburgh + others(if any)) Pittusburgh 15000 (Accounts + HR) Accounts 11000 (Alex + Robin) Alex 6000 (direct values) Robin 5000 HR 4000 Robert 4000 In my production environment, hierarchy table may contain 23000+ rows and fact table may contain 300,000+ rows. So, I thought of providing any level of groupid to the query to retrieve just its children and its corresponding aggregated value. Any better solution?

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• Difference between focus and focus-in(out)-event signals

  - by spajak

  Hello What's the difference between "focus" and "focus-in(out)-event" signals in GTK+? Which one is emitted firs? How are they related to keyboard(TAB) & mouse clicks. Do they depend on each other? I'm asking this because I want to keep track of currently focused widget within toplevel window and I don't want to test HAS_FOCUS flag of every widget when I need it. The widgets I'm interested of are deep inside other containers, boxes etc. What would be the best way in this situation for keeping & updating focused widget pointer?

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