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• [XAML] datatrigger

  - by Bert

  Hi, I have a UserControl in XAML with a couple of buttons.... When the "VideoEnable" property in my C# code change to true i want to change the color of a button. The following code compiles but crashes and I cant find a right solution <UserControl.Triggers> <DataTrigger Binding="{Binding VideoEnable}" Value="true"> <Setter Property="Button.Background" Value="Green" TargetName="VideoButton" /> <Setter Property="Grid.Background" Value="Blue" TargetName="videoGrid" /> </DataTrigger> </UserControl.Triggers>

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• What are the differences among sqlite3 from python2.5, pysqlite and apsw

  - by leo

  Hi, I would like to know the differences among sqlite3 from python2.5, pysqlite and apsw? I have a bumpy run when trying to install pysqlite on windows vista with python2.5, see following: download sqlite from http://sqlite.org/download.html and unzip them into windows/system32 folder and put sqlite3.dll into c:/python25/Lib folder download pysqlite windows installer when trying to run following in python shell: >>> from pysqlite2 import test Traceback (most recent call last): File "<stdin>", line 1, in <module> File "pysqlite2\test\__init__.py", line 35, in <module> from pysqlite2.test import dbapi, types, userfunctions, factory, transactions,\ File "pysqlite2\test\dbapi.py", line 27, in <module> import pysqlite2.dbapi2 as sqlite File "pysqlite2\dbapi2.py", line 27, in <module> from pysqlite2._sqlite import * ImportError: No module named _sqlite I am wondering anybody with experiences of the above three types of sqlite binding to python can comment their pros and cons such as performances I am wondering is it worthwhile to try the pysqlite or apsw thanks

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• How to determine whether a dependency object implements a given dependency property (C# / WPF)

  - by Tim Coulter

  I am working with the classes in the System.Windows.Documents namespace, trying to write some generic code that will conditionally set the value of certain dependency properties, depending on whether these properties exist on a given class. For example, the following method assigns an arbitrary value to the Padding property of the passed FrameworkContentElement: void SetElementPadding(FrameworkContentElement element) { element.SetValue(Block.PaddingProperty, new Thickness(155d)); } However, not all concrete implementations of FrameworkContentElement have a Padding property (Paragraph does but Span does not) so I would expect the property assignment to succeed for types that implement this property and to be silently ignored for types that do not. But it seems that the above property assignment succeeds for instances of all derivatives of FrameworkContentElement, regardless of whether they implement the Padding property. I make this assumption because I have always been able to read back the assigned value. I assume there is some flaw in the way I am assigning property values. What should I do to ensure that a given dependency property assignment is ignored by classes that do not implement that property? Many thanks for your advice. Tim

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• SelectedValue which is invalid because it does not exist in the list of items

  - by Bob Jones

  I encounter this problem repeatedly, and haven't a clue what is causing it. I get an exception in the DataBind: "SelectedValue which is invalid because it does not exist in the list of items". Here are some important pieces of information: 1) I reload listOrgs periodically when the underlying data has changed. 2) The Organization.DTListAll call returns about 500 Int, String pairs. 3) There are no duplicate or null values in the returned data 4) After the first two lines below, listOrgs.Items.Count is 0, and the Selected Value is 0 5) The selected value when the DataBind operation executes is a value that is not in the set of ID values returned 6) All of the stuff I have found on line so far hasn't helped. 7) I am stumped! listOrgs.Items.Clear(); listOrgs.SelectedValue = "0"; listOrgs.DataSource = new Organization().DTListAll(SiteID); listOrgs.DataTextField = "OrganizationName"; listOrgs.DataValueField = "OrganizationID"; listOrgs.DataBind(); Bob Jones

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• working with generic lifetime managers in unity config section

  - by Martin Bailey

  I have the following generic lifetime manager public class RequestLifetimeManager<T> : LifetimeManager, IDisposable { public override object GetValue() { return HttpContext.Current.Items[typeof(T).AssemblyQualifiedName]; } public override void RemoveValue() { HttpContext.Current.Items.Remove(typeof(T).AssemblyQualifiedName); } public override void SetValue(object newValue) { HttpContext.Current.Items[typeof(T).AssemblyQualifiedName] = newValue; } public void Dispose() { RemoveValue(); } } How do I reference this in the unity config section. Creating a type alias <typeAlias alias="requestLifeTimeManager`1" type=" UI.Common.Unity.RequestLifetimeManager`1, UI.Common" /> and specifying it as a lifetime manager <types> <type type="[interface]" mapTo="[concretetype]" > <lifetime type="requestLifeTimeManager`1" /> </type> </types> causes the following error Cannot create an instance of UI.Common.Unity.RequestLifetimeManager`1[T] because Type.ContainsGenericParameters is true. How do you reference generic lifetime managers ?

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• Re-Apply currency formatting to a UITextField on a change event

  - by Jim Aldes

  Howdy all, I'm working with a UITextField that holds a localized currency value. I've seen lots of posts on how to work with this, but my question is: how do I re-apply currency formatting to the UITextField after every key press? I know that I can set up and use a currency formatter with: NSNumberFormatter *currencyFormatter = [[NSNumberFormatter alloc] init]; [currencyFormatter setNumberStyle:NSNumberFormatterCurrencyStyle]; ... [currencyFormatter stringFromNumber:...]; but I don't know how to hook it up. For instance, if the value in the field reads "$12,345" and the user taps the "6" key, then the value should change to "$123,456". Which callback is the "correct" one to do this in (should I use textField:shouldChangeCharactersInRange:replacementString: or a custom target-action) and how do I use the NSNumberFormatter to parse and re-apply formatting to the UITextField's text property? Any help would be much appreciated! Thanks!

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• Building log4cxx on visual 2005

  - by retto

  Hello, When I build the log4cxx on Visual 2005 according to instructions http://logging.apache.org/log4cxx/building/vstudio.html, I am getting error below; 1>------ Build started: Project: apr, Configuration: Debug Win32 ------ 1>Compiling... 1>userinfo.c 1>c:\program files\microsoft visual studio 8\vc\platformsdk\include\rpcndr.h(145) : error C2059: syntax error : ':' 1>c:\program files\microsoft visual studio 8\vc\platformsdk\include\rpcndr.h(898) : error C2059: syntax error : ',' . . . 1>c:\program files\microsoft visual studio 8\vc\platformsdk\include\rpcndr.h(3119) : fatal error C1003: error count exceeds 100; stopping compilation When clicking the first error moves to code below /**************************************************************************** * Other MIDL base types / predefined types: ****************************************************************************/ typedef unsigned char byte; typedef ::byte cs_byte; // error indicates here Is there any comment?? Thanks

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• Posting a textarea form with cURL

  - by Joey

  How would I go about posting a textarea form? <form method="post" action="/user/test/shoutbox/add" id="shoutPost" class="clearit"> <input name="formtoken" type="hidden" value="852f8fde54190fa5f9aa47172d492f829c1b"/> <input type="hidden" name="backto" value="/user/text/shoutbox" /> <textarea id="shoutmsg" name="message"></textarea> <input type="submit" name="submit" class="confirmButton" value="Post" id="sbPost" /> This should work right? curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt ($ch, CURLOPT_POST, 1); $postfields .= "&message=".$msg; $postfields .= "&submit=sbPost"; curl_setopt($ch, CURLOPT_POSTFIELDS,$postfields); curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1); $page = curl_exec($ch); but it's not posting for some reason...

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• Java script simple question

  - by butteff

  Sorry for my bad English! I have got one question. Why when i click on the button at second time, Occurs nothing? But at first click everything is good! <form name="alert"><input type="text" name="hour"><input type="text" name="min"><input type="button" value="ok" onclick="budilnik(this.form)"> <script type="text/javascript"> function budilnik(form) { budilnik=1; min=form.min.value; hour=form.hour.value; alert (min+' '+hour+' '+budilnik); } </script>

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• Get drive label in C#

  - by Rick

  When I use System.IO.DriveInfo.GetDrives() and look at the .VolumeLabel property of one of the drives, I see "PATRIOT XT", which is indeed the drive's volume label. If I open "My Computer", instead I see "TrueCrypt Traveler Disk", and I can't seem to find any way to programmatically retrieve that value as none of the DriveInfo properties hold that value. I also tried querying the information via WMI's Win32_LogicalDisk, but no properties contained that value there either. So any idea what the label My Computer uses is called, and more importantly, how to programmatically retrieve it? Thanks

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• MySQL Trigger creation

  - by Bruce Garlock

  I have an application where I need to INSERT an auto_increment value from a PK in another table. I know how to do this in PHP, but I need to have this done at the DB level, since I cannot change the program logic. I am new to triggers, so I'm sure this will be an easy answer for someone. Here is what I have so far: DELIMITER // CREATE TRIGGER new_project AFTER INSERT ON m_quality_header FOR EACH ROW BEGIN INSERT INTO m_quality_detail (d_matl_qa_ID) VALUES (NEW.h_matl_qa_ID); END// DELIMITER ; I just want the value of the auto_increment value from h_matl_qa_ID to be inserted as a new record into d_matl_qa_ID. The error I get is: "This version of MySQL doesn't yet support 'multiple triggers with the same action time and event for one table' But, I don't want to update the table that has the trigger, so why is my current code considered a 'multiple' trigger? This is on MySQL 5.0.45-7.el5 running on a CentOS 5 server (64-bit Intel) If I have to, I can modify the PHP code, but that needs to be the last resort.

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• Entitiy Framework: "Update Database from Model" instead of "Generate Database from Model"

  - by David

  Hey everyone, I have created a Entity Framework 4 model with Visual Studio 2010 and generated a database from it. Now I found myself adding new properties (with default values), changing documentation of columns, changing names of columns, changing types of columns several times. All tasks that do not require much "extra work" in order not to be possible to be achieved automatically (in my humble opinion). Everytime I did "Generate Database from Model" and lost of course the table data. Is there a way just to update the database's architecture so to say - leaving the table data untouched? Maybe with some user interaction especially when changing types etc.? Or would this functionality be simply too difficult to be realized to work in a reliable way? Thanks in advance! Cheers, David

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• Use C++ with Objective-C in XCode

  - by prosseek

  I want to use/reuse C++ object with Objective-C. I have a hello.h that has the class definition, and hello.cpp for class implementation. class Hello { int getX() ... }; And I use this class in Objective-C function. #include "hello.h" ... - (IBAction) adderTwo:(id)sender { Hello *hi = new Hello(); int value = hi->getX(); NSLog(@"Hello %d", value); [textField setIntValue:value]; When I compile the code in Xcode, I get this error message. class Hello *XXXXX Users/smcho/Desktop/cocoa/adderTwo/hello.h:9:0 /Users/smcho/Desktop/cocoa/adderTwo/hello.h:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Hello' Q: What went wrong? Am I missing something?

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• How to make QCombobox painting item delegate for it's current Item? (Qt 4)

  - by r4nj33t

  QCombobox set Item delegate not painting for current Item.. I am trying to create a combo box showing different line types (Solid, Dotted, Dash etc). Currently i am setting item delegate for its content so as to draw/paint line type instead of displaying names. All line types are drawing currectly but as soon as i am selecting any line type from the combobox, the current index of combo box is displaying just the line name and not painting it. How can i make it paint the selected line type on the current combo box index?

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• Clear default values using onsubmit

  - by Thomas

  I need to clear the default values from input fields using js, but all of my attempts so far have failed to target and clear the fields. I was hoping to use onSubmit to excute a function to clear all default values (if the user has not changed them) before the form is submitted. <form method='get' class='custom_search widget custom_search_custom_fields__search' onSubmit='clearDefaults' action='http://www.example.com' > <input name='cs-Price-2' id='cs-Price-2' class='short_form' value='Min. Price' /> <input name='cs-Price-3' id='cs-Price-3' class='short_form' value='Max Price' /> <input type='submit' name='search' class='formbutton' value=''/> </form> How would you accomplish this?

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• jQuery UI Slider - Animation of handle and scroll content not in sync

  - by Mayko

  Im having troubles getting the jQuery UI Slider customized for my purposes. On load the slider and its content should automatically animate to a certain position. Ideally it should animate to the very right, then stop and then animate back (as a loop) as long as the user doesn't hovers over scroll content or slider. Following my default slider setup (http://jsfiddle.net/mayko/j6WuE/1/): var scrollbar = $("#slider").slider({ animate: 3000, min: 0, max: $("#timeline_content .items").width(), change: handleSlider, slide: handleSlider }); function handleSlider(e, ui) { $("#timeline_content").stop().animate({scrollLeft: ui.value}, scrollbar.slider("option", "animate")); } If i now try to set the value like this: $('#slider').slider({'value': 1000}); The scroll content nicely animates, but the handle just jumps to that new position. Even if I click on the slider track itself the animation of scroll content and slider handle are not in sync. Does anyone got a solution?

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• A very weird problem with texbox control in C# .net

  - by Kazoom

  Well i know textbox is a very simple user control, perhaps the first input control ever made. I have been facing a very frustrating problem with this simple control. I programatically add a textbox in my user control. From ui i am able to edit it like a normal textbox. however, i am not able to read the user inputed value in the program. my program all the time sees the old value with which my text box was initialized. i textchange event getting triggered but the value never gets updated. This seemingly looks to be some innocuous bug in the code, but the program is very simple and it does not seem to be having any bug. Any guidelines on this issue?

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• Can we use spring FTL based form validations with any controller other than SimpleFormController

  - by Adhir Aima

  Hi, Because of some design specification we have to extend all controllers in spring MVC from a class that extends AbstractCommandController. I am trying to include the spring FTL based form validations in my FTL file, but it gives me an error like Method public org.springframework.web.servlet.support.BindStatus org.springframework.web.servlet.support.RequestContext.getBindStatus(java.lang.String) throws java.lang.IllegalStateException threw an exception when invoked on org.springframework.web.servlet.support.RequestContext@b05cd7 with arguments of types [java.lang.String,] The problematic instruction: == assignment: status=springMacroRequestContext.getBindStatus(path) [on line 120, column 9 in spring.ftl] in user-directive spring.bind [on line 47, column 33 in myProfile.ftl] Java backtrace for programmers: freemarker.template.TemplateModelException: Method public org.springframework.web.servlet.support.BindStatus org.springframework.web.servlet.support.RequestContext.getBindStatus(java.lang.String) throws java.lang.IllegalStateException threw an exception when invoked on org.springframework.web.servlet.support.RequestContext@b05cd7 with arguments of types [java.lang.String,] I have put the command name properly in the controller class and in the controller class, neither the specified name nor the default "command" works. Some help please. And would be much appreciated if it comes with an example. Thanks in advance, Adhir Aima

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• Passing Custom event arguments to timer_TICK event

  - by Nimesh

  I have class //Create GroupFieldArgs as an EventArgs public class GroupFieldArgs : EventArgs { private string groupName = string.Empty; private int aggregateValue = 0; //Get the fieldName public string GroupName { set { groupName = value; } get { return groupName; } } //Get the aggregate value public int AggregateValue { set { aggregateValue = value; } get { return aggregateValue; } } } I have another class that creates a event handler public class Groupby { public event EventHandler eh; } Finally I have Timer on my form that has Timer_TICK event. I want to pass GroupFieldArgs in Timer_TICK event. What is the best way to do it?

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• LLBLGen: Copy table from one database to another

  - by StreamT

  I have two databases (SQL Server 2005) with the same table schemes. I need to copy data from source table to destination with some modification of data along the way. And if destination table already contains some data, then rows from source table should not override, but be added to the destination table. In our project we use LLBLGen and LINQ to LLBLGen to as ORM solution. Example: Table 1: Table 2: Table 1: Key Value Key Value Key Value 1 One 1 T2_One Result=> 1 One 2 Two 2 T2_Two 2 Two 3 Three 3 Three 4 T2_One 5 T2_Two

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• ASP.NET MVC 2: Custom client side validation rule for dropdowns

  - by Nigel

  I have some custom validation that I need to perform that involves checking the selected option of a dropdown and flagging it as invalid should the user select a specific option. I am using ASP.NET MVC 2 and have a custom Validator and custom server side and client side validation rules as described in this blog article. The server side validation is working fine, however, the client side validation is failing. Here is the javascript validation rule: Sys.Mvc.ValidatorRegistry.validators["badValue"] = function(rule) { var badValue = rule.ValidationParameters["badValue"]; return function(value, context) { if (value != badValue) { return true; } return rule.ErrorMessage; }; }; The rule is being applied to the dropdowns successfully, and placing a breakpoint within the returned function confirms that the validation is firing, and that the 'badValue' is being correctly set. However, 'value' is always null, and so the check always fails. What am I doing wrong?

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• boost pool_alloc

  - by mr grumpy

  Why is the boost::fast_pool_allocator built on top of a singleton pool, and not a separate pool per allocator instance? Or to put it another way, why only provide that, and not the option of having a pool per allocator? Would having that be a bad idea? I have a class that internally uses about 10 different boost::unordered_map types. If I'd used the std::allocator then all the memory would go back to the system when it called delete, whereas now I have to call release_memory on many different allocator types at some point. Would I be stupid to roll my own allocator that uses pool instead of singleton_pool? thanks

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• How to use the select tag in Struts2?

  - by Mes

  I have class A { private String field1; private String field2; private B b; } class B { private String field3; } List<A> myList; How can I access the field3 using the myList? This would work for field1 and field2, but how about field3? <s:iterator value="myList"> <tr> <td><s:property value="field1"/></td> <td><s:property value="field2"/></td> </tr> </s:iterator>

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• Newbie questions about COM

  - by smwikipedia

  Hi, I am quite new to COM so the question may seem naive. Q1. About Windows DLL Based on my understanding, a Windows DLL can export functions, types(classes) and global variables. Is this understanding all right? Q2. About COM My naive understanding is that: a COM DLL seems to be just a new logical way to organize the functions and types exported by a standard Windows DLL. A COM DLL exports both functions such as DllRegisterServer() and DllGetClassObject(), and also the Classes which implements the IUnknown interface. Is this understanding all right? Q3. *.def & *.idl *.def is used to define the functions exported by a Windows DLL in the traditional way, such as DllGetClassObject(). *.idl is used to define the interface implemented by a COM coclass. Thanks in advance.

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• !(ReferenceEquals()) vs != in Entity Framework 4

  - by Eric J.

  Unless a class specifically overrides the behavior defined for Object, ReferenceEquals and == do the same thing... compare references. In property setters, I have commonly used the pattern private MyType myProperty; public MyType MyProperty { set { if (myProperty != value) { myProperty = value; // Do stuff like NotifyPropertyChanged } } } However, in code generated by Entity Framework, the if statement is replaced by if (!ReferenceEquals(myProperty, value)) Using ReferenceEquals is more explicit (as I guess not all C# programmers know that == does the same thing if not overridden). Is there any difference that's escaping me between the two if-variants? Are they perhaps accounting for the possibility that POCO designers may have overridden ==? In short, if I have not overridden ==, am I save using != instead of ReferencEquals()?

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