rob allen - Page 43 - Developer IT

VB.NET function that takes other functions as a parameter, and executes them

- by rob

Hello, Is there a way in vb.net to create a sub/function that will take as an argument some kind of pointer to another function, and allow this new sub/function to execute the passed function? What I have are 10-12 xml-rpc functions I am calling against a remote server. Each of these functions has different argument lists (one takes 1 string, another might take 3 strings and one int, etc). All of them return an object. As I am calling these, it seems like it should be able to be factored better. For instance, everytime I call any of these functions, I want to test the return value for a session drop, and do something to try and reconnect to the remote system, etc. Using .net 3.5 Thanks! -R

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Alternative to Microsoft Agent / Fix for color issue?

- by Rob P.

I've got an app that does Text-To-Speech; but I wanted to show an animated face/character to go with it. I found a tutorial on Microsoft Agent and I implemented it in my vb.net app. The problem is with the transparency color. Unless I run application in compatibility mode/256 colors, the characters will appear with a purplish-pink background image instead of a transparent back-color. But running the app in 256 colors the rest of the app looks awfully out of place. First - is there something that works similar to MS Agent I can use that would be more appropriate? Second - if I'm still MS Agent - can I get the transparent color to work correctly without limiting myself to 256 colors?

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jQuery error when aborting an ajax call only in Internet Explorer

- by Rob Crowell

When mousing over an image in a jcarousel, my site displays a popup whose contents are loaded via ajax. I'm doing what I thought was fairly straightforward; keeping a handle to the xhrRequest object, and aborting the existing one before making a new request. It works great in all browsers except IE, where I receive an error "Object doesn't support this property or method" Here's the code that is triggering it: function showPopup { // ... code snipped ... // cancel the existing xhr request if (showPopup.xhrRequest != null) { showPopup.xhrRequest.abort(); showPopup.xhrRequest = null; } showPopup.xhrRequest = $.ajax({url: url, type: "GET", success:function(data) { $("#popup-content").html(data); } }); // ... code snipped ... } showPopup.xhrRequest = null; Works great in Firefox and Chrome. I traced the error down to this bit of code in jquery.js inside the ajax function (line 5233 in my copy of jQuery): // Override the abort handler, if we can (IE doesn't allow it, but that's OK) // Opera doesn't fire onreadystatechange at all on abort try { var oldAbort = xhr.abort; xhr.abort = function() { if (xhr ) { oldAbort.call( xhr ); } onreadystatechange( "abort" ); } catch(e) { } The specific error occurs on the oldAbort.call( xhr ) line. Any ideas?

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xval get message from resource file

- by Rob

I'm working on a CMS system which uses a resource file to get information and errormessages from. The client side validation is working without problems, only it's not getting the errormessage from the resource file. While debugging i figured out xval seems to get the errormessages from a javascript file where the messages are set hard-coded. Is there some way to override this? Below the code which should make the relation to the resourcefile en specify the error when the field is left empty. [Property] [Required(ErrorMessageResourceType = typeof(CMSMessages), ErrorMessageResourceName = "EnterValidMoney")] public virtual Double ShippingCost { get; set; }

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Creating a custom Configuration

- by Rob

I created a customer configuration class Reports. I then created another class called "ReportsCollection". When I try and do the "ConfigurationManager.GetSection()", it doesn't populate my collection variable. Can anyone see any mistakes in my code? Here is the collection class: public class ReportsCollection : ConfigurationElementCollection { public ReportsCollection() { } protected override ConfigurationElement CreateNewElement() { throw new NotImplementedException(); } protected override ConfigurationElement CreateNewElement(string elementName) { return base.CreateNewElement(elementName); } protected override object GetElementKey(ConfigurationElement element) { throw new NotImplementedException(); } public Report this[int index] { get { return (Report)BaseGet(index); } } } Here is the reports class: public class Report : ConfigurationSection { [ConfigurationProperty("reportName", IsRequired = true)] public string ReportName { get { return (string)this["reportName"]; } //set { this["reportName"] = value; } } [ConfigurationProperty("storedProcedures", IsRequired = true)] public StoredProceduresCollection StoredProcedures { get { return (StoredProceduresCollection)this["storedProcedures"]; } } [ConfigurationProperty("parameters", IsRequired = false)] public ParametersCollection Parameters { get { return (ParametersCollection)this["parameters"]; } } [ConfigurationProperty("saveLocation", IsRequired = true)] public string SaveLocation { get { return (string)this["saveLocation"]; } } [ConfigurationProperty("recipients", IsRequired = true)] public RecipientsCollection Recipients { get { return (RecipientsCollection)this["recipients"]; } } } public class StoredProcedure : ConfigurationElement { [ConfigurationProperty("storedProcedureName", IsRequired = true)] public string StoredProcedureName { get { return (string)this["storedProcedureName"]; } } } public class StoredProceduresCollection : ConfigurationElementCollection { protected override ConfigurationElement CreateNewElement() { throw new NotImplementedException(); } protected override ConfigurationElement CreateNewElement(string elementName) { return base.CreateNewElement(elementName); } protected override object GetElementKey(ConfigurationElement element) { throw new NotImplementedException(); } public StoredProcedure this[int index] { get { return (StoredProcedure)base.BaseGet(index); } } } } And here is the very straight-forward code to create the variable: ReportsCollection reportsCollection = (ReportsCollection) System.Configuration.ConfigurationManager.GetSection("ReportGroup");

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PHP Bz2 extension question

- by Rob

Hi, I wanted to ask: when I am using php.net/bzopen, does I need to bzwrite() already compressed by bzcompress() string or it being compressed automatically while writing?

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UIPickerView issues - iphone

- by Rob J

I have the following: - (NSInteger) numberOfComponentsInPickerView:(UIPickerView *)pickerView { return 2; } - (NSInteger) pickerView:(UIPickerView *) pickerView numberOfRowsInComponent:(NSInteger) component { return [genderPickerData count]; return [agePickerData count]; } When I do this, the UIPicker is split into 2 components, but the PickerData is only being represented for gender on both pickers. I am trying to figure out through Apple's confusing documentation on how I reference each individual component but can't seem to figure it out.

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problem running system.net.webclient and process.start off a control event

- by Rob

The following code causes my vs 2008 wpf project to hang, I'm not sure why. Both Part 1 and Part 2 work perfectly fine independently, but when I run them together on an control event (click a button for example) the program hangs. I've also tried shell execute for part 2 - same results. However, this code when run within the form loaded event works fine. Any insights would be truly appreciated. Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles Button1.Click 'Part 1 Dim myWebClient As System.Net.WebClient = New System.Net.WebClient Dim CurrentDataFileContents As String = myWebClient.DownloadString("http://www.xyz.com") myWebClient.Dispose() 'Part 2 System.Diagnostics.Process.Start("http://www.test.com") End Sub

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Using ViewModels in ASP.NET MVC 2 - multiple forms

- by Rob Ellis

I couldn't find any documentation around using multiple forms in an ASP.NET MVC 2 ViewModel approach. i.e. In the built in application when you select New MVC2 web app, the register page uses a ViewPage which inherits like this:- Inherits="System.Web.Mvc.ViewPage" I wanted to use that approach on a page with multiple forms, but that RegisterModel only supported one form.

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Is there an OData Server Library for Java or PHP to EXPOSE OData?

- by Rob

Hi, I am wondering if there is or why there isn't a ADO.NET Data Services Server Library for Java? I need to expose a database from a Java Server but i only see Microsot providing clients for java not server parts. How is that an open standard when you need .NET/Windows to expose it? Thanks for any pointers to that. Same interesting for PHP as well.

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iPhone code to create new NSUserDefaults objects?

- by Rob

I have NSUserDefaults storing a number of string variables for things like name, date of birth, address, etc. What I would like to know is how to write a code that will create a new object for each new user. For example, I have a spinning wheel that shows up immediately after the first time the user runs the app. What I want, is for that wheel to have one single option - "New User". Once that New User fills out a bunch of text fields that I am using NSUserDefaults to save, I want that user to be saved on that spinning wheel so that the next time they open up the app they have the option of returning to all of the variables that they previously put in, or creating a new user so they can input all new variables. I know how to do everything except write the code to create new users automatically. Potentially, the program should allow for a limitless number of these user objects and then just use something arbitrary like their last name to input into the spinning wheel. I would assume that the code would need to be put somewhere in the following code used to save the NSUserDefaults: NSUserDefaults *userData = [NSUserDefaults standardUserDefaults]; [userData setObject:txtName.text forKey:@"name"];

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Apache - Reverse Proxy and HTTP 302 status messsage

- by Rob

My team is trying to setup an Apache reverse proxy from a customer's site into one of our web applications. http://www.example.com/app1/some-path maps to http://internal1.example.com/some-path Inside our application we use struts and have redirect = true set on certain actions in order to provide certain functionality. The 302 status messages from these re-directs cause the user to break out of the proxy resulting in an error page for the end user. HTTP/1.1 302 Found Location: http://internal.example.com/some-path/redirect Is there any way to setup the reverse proxy in apache so that the redirects work correctly? http://www.example.com/app1/some-path/redirect

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Django Image Upload: IOErrno2 Could not find path -- and yet it's saving the image there anyway?

- by Rob

I have an issue where the local version of django is handling image upload as expected but my server is not. Note: I am using a Django Container on MediaTemple.net (grid server) Here is my code. def view_settings(request): <snip> if request.POST: success_msgs = () mForm = MainProfileForm(request.POST, request.FILES, instance = mProfile) pForm = ChangePasswordForm(request.POST) eForm = ChangeEmailForm(request.POST) if mForm.is_valid(): m = mForm.save(commit = False) if mForm.cleaned_data['avatar']: m.avatar = upload_photo(request.FILES['avatar'], settings.AVATAR_SAVE_LOCATION) m.save() success_msgs += ('profile pictured updated',) <snip> def upload_photo(data,saveLocation): savePath = os.path.join(settings.MEDIA_ROOT, saveLocation, data.name) destination = open(savePath, 'wb+') for chunk in data.chunks(): destination.write(chunk) destination.close() return os.path.join(saveLocation, data.name) Here's where it gets whacky and I was hoping someone could shed a light on this error, because either a) it's the wrong error code, or b) something is happening with the file before it's completely handled. To recap, the file was actually uploaded to the server in the intended directory - and yet this err msg continues to persist. IOError at /user/settings [Errno 2] No such file or directory: u'/home/user66666/domains/example.com/html/media/images/avatars/DSC03852.JPG' Environment: Request Method: POST Request URL: http://111.111.111.111:2011/user/settings Django Version: 1.0.2 final Python Version: 2.4.4 Installed Applications: ['django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'ctrlme', 'usertools', 'easy_thumbnails'] Installed Middleware: ('django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware') Traceback: File "/home/user6666/containers/django/leonidas/usertools/views.py" in view_settings m.avatar = upload_photo(request.FILES['avatar'], settings.AVATAR_SAVE_LOCATION) File "/home/user666666/containers/django/leonidas/usertools/functions.py" in upload_photo destination = open(savePath, 'wb+')

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CSS opacity and child elements

- by Rob

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How can I get the nickname and message from raw IRC data in vb.net

- by Rob

Well basically I've got a vb.net script connecting to IRC, and I'm working on making it a basic chat system, but I've run into a problem. Say I receive this: :[email protected] PRIVMSG #channel :message I want to grab specific information to output to the user. I want to grab nickname and message How can I go about doing this? I thought about using regex, but I can't figure out how to make regex grab message since there's nothing after it.

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switch to mysqli a good idea?

- by Rob

I'm considering switching to mysqli for all my php projects. The way my code is written (I run very simple websites and built my own basic framework which I use across all of them) I shouldn't have too many problems modifying the functions and classes. However, i've only heard positive things about prepared statements, bar a few grumblings about the php functions available, most notably the lack of a simple replacement for using mysql_fetch_array in a while. This sounds a bit too good to be true, so I wondered if anyone could highlight some of the issues with using prepared statements, such as speed and resource usage.

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PostgreSQL - Error: SQL state: XX000.

- by rob

I have a table in Postgres that looks like this: CREATE TABLE "Population" ( "Id" bigint NOT NULL DEFAULT nextval('"population_Id_seq"'::regclass), "Name" character varying(255) NOT NULL, "Description" character varying(1024), "IsVisible" boolean NOT NULL CONSTRAINT "pk_Population" PRIMARY KEY ("Id") ) WITH ( OIDS=FALSE ); And a select function that looks like this: CREATE OR REPLACE FUNCTION "Population_SelectAll"() RETURNS SETOF "Population" AS $BODY$select "Id", "Name", "Description", "IsVisible" from "Population"; $BODY$ LANGUAGE 'sql' STABLE COST 100 Calling the select function returns all the rows in the table as expected. I have a need to add a couple of columns to the table (both of which are foreign keys to other tables in the database). This gives me a new table def as follows: CREATE TABLE "Population" ( "Id" bigint NOT NULL DEFAULT nextval('"population_Id_seq"'::regclass), "Name" character varying(255) NOT NULL, "Description" character varying(1024), "IsVisible" boolean NOT NULL, "DefaultSpeciesId" bigint NOT NULL, "DefaultEcotypeId" bigint NOT NULL, CONSTRAINT "pk_Population" PRIMARY KEY ("Id"), CONSTRAINT "fk_Population_DefaultEcotypeId" FOREIGN KEY ("DefaultEcotypeId") REFERENCES "Ecotype" ("Id") MATCH SIMPLE ON UPDATE NO ACTION ON DELETE NO ACTION, CONSTRAINT "fk_Population_DefaultSpeciesId" FOREIGN KEY ("DefaultSpeciesId") REFERENCES "Species" ("Id") MATCH SIMPLE ON UPDATE NO ACTION ON DELETE NO ACTION ) WITH ( OIDS=FALSE ); and function: CREATE OR REPLACE FUNCTION "Population_SelectAll"() RETURNS SETOF "Population" AS $BODY$select "Id", "Name", "Description", "IsVisible", "DefaultSpeciesId", "DefaultEcotypeId" from "Population"; $BODY$ LANGUAGE 'sql' STABLE COST 100 ROWS 1000; Calling the function after these changes results in the following error message: ERROR: could not find attribute 11 in subquery targetlist SQL state: XX000 What is causing this error and how do I fix it? I have tried to drop and recreate the columns and function - but the same error occurs. Platform is PostgreSQL 8.4 running on Windows Server. Thanks.

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Translate a webpage in PHP

- by Rob

I'm looking to translate a webpage in PHP 5 so I can save the translation and make it easily accessible via mydomain.com/lang/fr/category/article.html rather than users having to go through google translate. I've found various easy ways to translate text via CURL, however what i'd really like to be able to do is translate an entire webpage but obviously ignore the tags. The problem is that Google Translate messes up all the HTML tags, class names etc Does anyone know of a php class that can translate an entire webpage whilst ignoring the tags? I'm guessing it may be possible via advanced regular expressions or something like that, but i'm not sure. I can't just curl Google's response as i'll have all the extra JS that they put in. Any ideas?

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iphone not displaying array variables correctly

- by Rob

I was reading a tutorial on how to do a UIPicker and found this code: - (IBAction)buttonPressed { NSInteger row = [userPicker selectedRowInComponent:0]; NSString *selected = [userPickerData objectAtIndex:row]; NSString *title = [[NSString alloc] initWithFormat:@"You selected %a", selected]; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:@"Thank you for Choosing." delegate:nil cancelButtonTitle:@"You're Welcome" otherButtonTitles:nil]; [alert show]; [alert release]; [title release]; } - (void)viewDidLoad { // [super viewDidLoad]; NSArray *array = [[NSArray alloc] initWithObjects:@"New", @"Frank", @"Bob", @"Thor", nil]; self.userPickerData = array; [array release]; } The UIPicker displays correctly and the variables in the picker also display correctly. When the button is pressed then the alert message does come up but it says, "You selected.." and then it's a bunch of gibberish. Why aren't the array variables being passed correctly?

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Prevent users from being able to access a webpage via web browser?

- by Rob

My friend and I are working on a program. This program is going to submit GET data to our webpage. However, we don't want users accessing the webpage any other way than the program. We can prevent users from sharing the program using HWID authentication, but nothing prevents them from using a packet scanner to get the URL of the webpage. We thought about user-agent authentication, which we will implement, but user-agents can easily be spoofed. So my question is, how can we prevent users from accessing the webpage directly, instead of through the program? Even if you don't have an answer that will completely work, anything that will help deter them would be nice. Currently we will be implementing: HWID Authentication to use the program User-Agent Authentication to access the web page Instant IP Blacklisting to anyone accessing the webpage without the proper User-Agent

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How can I perform action from ASP.NET MVC with different user credentials?

- by Rob

Hopefully this explanation will make sense, but what is the best way (if it is even possible) to pass along user credentials to preform a specific application from an ASP.NET MVC application. Currently I am working on trying to create directories on another server, we can't do this using the generic credentials that the application is running with; however, we have been told that we can if we pass the credentials of the user currently using the application along. Currently we are running on IIS 6.0 but will be moving to IIS 7.0 in the near future and likewise we are using Integrated Windows authentication for the web applications.

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Using the Microsoft Ajax Minifier with Web Setup project & Source Control

- by Rob

I've just started investigating the Microsoft Ajax Minifer 4.0 for use with a Visual Studio 2008 Web Application I work on. It's proven easy enough to hook it into the .csproj file so it produced .min.js files for all scripts, however I'm stumped as to how to integrate this with the Web Setup project & Source Control. Essentially what I want to do is have the resultant .min.js files included in the Web Setup project without having them included in Source Control because: Having to check them out prior to the build being executing is a pain (the minifier cannot modify them if they're not checked out). As they're created as a "build artifact" it just seems wrong to have them stored under source control. The only option I've managed to come across so far is to explicitly include the .min.js files as part of the Setup project by right clicking on the Web Setup project and choosing "Add File", and then having the relevant folder hierarchy duplicated in "File System on Target Machine" so that I can force the file to the correct location. This is neither elegant or simple/robust as: It requires me to manually add every minified js file to the Web Setup project by hand Maintain a copy of the relevant directory structure in both the Web Application project and the Web Setup project Remember to add any new js files minified versions to the Web Setup project Is there a better way of doing this?

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HQL query for entity with max value

- by Rob

I have a Hibernate entity that looks like this (accessors ommitted for brevity): @Entity @Table(name="FeatureList_Version") @SecondaryTable(name="FeatureList", pkJoinColumns=@PrimaryKeyJoinColumn(name="FeatureList_Key")) public class FeatureList implements Serializable { @Id @Column(name="FeatureList_Version_Key") private String key; @Column(name="Name",table="FeatureList") private String name; @Column(name="VERSION") private Integer version; } I want to craft an HQL query that retrieves the most up to date version of a FeatureList. The following query sort of works: Select f.name, max(f.version) from FeatureList f group by f.name The trouble is that won't populate the key field, which I need to contain the key of the record with the highest version number for the given FeatureList. If I add f.key in the select it won't work because it's not in the group by or an aggregate and if I put it in the group by the whole thing stops working and it just gives me every version as a separate entity. So, can anybody help?

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Using Bundler along with preinstalled gems

- by Rob Cameron

So I've got thin installed the old fashioned way: gem install thin I put an app on the server and installed all of its required gems via bundler: bundle install But, when I tried to start the app with thin start, it can't find any of the bundler-installed gems since they're not installed in the default gems directory. My question is: how do I make this work? Do I need to install thin via bundler as well? Will that still set up the thin executable in /usr/bin so I can start it from the command line like normal? Thanks!

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Do you have any tips for comments to keep them in step with the code? [closed]

- by Rob Wells

Possible Duplicate: How do you like your comments? G'day, I've read both of Steve McConnell's excellent Code Complete books "Code Complete" and "Code Complete 2" and was wondering if people have any other suggestions for commenting code. My commenting mantra could be summed up by the basic idea of expressing "what the code below cannot say". While enjoying this interesting blog post by Jeff about commenting I was still left wondering "When coding, when do you feel a comment is required?" Edit: Oops. Seems to be a duplicate of this question http://stackoverflow.com/questions/121945/how-do-you-like-your-comments so sorry for the noise. Thanks to my, seemingly, SO shadow for pointing it out - wouldn't have thought I was that interesting. Now off to read the original post and see if it is relevant. Edit: I meant to emphasise the best appraoch to ensure that your comments will stay in step with the code. Maybe expressing an intent rather than the mechansim for instance.

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