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  • How to create custom exception handler for custom controls or extension methods.

    - by Shantanu Gupta
    I am creating an extension method in C# to retrieve some value from datagridview. Here if a user gives column name that doesnot exists then i want this function to throw an exception that can be handled at the place where this function will be called. How can i achieve this. public static T Value<T>(this DataGridView dgv, int RowNo, string ColName) { if (!dgv.Columns.Contains(ColName)) throw new ArgumentException("Column Name " + ColName + " doesnot exists in DataGridView."); return (T)Convert.ChangeType(dgv.Rows[RowNo].Cells[ColName].Value, typeof(T)); }

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  • Newbie question: Creating a custom control

    - by Wild Thing
    Hi, I have an ASP.Net site, in which I am using a ListView with a Datapager. Apparently there is a bug with the Datapager, where it crashes if there is an empty ampersand (&) in the querystring. This is a known issue: https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=357344&wa=wsignin1.0#tabs I see that there is a workaround given, but did not understand how to implement it. Can somebody point me in the right direction? Also, I see that this issue is marked as resolved. Any idea where I can find the updated version of this control? Wild Thing

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  • iphone tabbar with custom buttons and scrollvie

    - by chunjai
    i'm trying to get a tab bar effect not unlike russel quinn's 'creative review' app. the tabbar swipes across, which i have figured out, but the tabbar style itself is unlike anything i've seen on the iphone (though it looks so simple!). it has square buttons with a space between, and each button has a select/active/inactive state. i'm having a hard time seeing how this can be tabbar, but i don't know any other way. can someone explain this? here's the example :: http://bit.ly/c8CeBC. any help is appreciated.

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  • J2EE: Default values for custom tag attributes

    - by Nick
    So according to Sun's J2EE documentation (http://docs.sun.com/app/docs/doc/819-3669/bnani?l=en&a=view), "If a tag attribute is not required, a tag handler should provide a default value." My question is how in the hell do I define a default value as per the documentation's description. Here's the code: <%@ attribute name="visible" required="false" type="java.lang.Boolean" %> <c:if test="${visible}"> My Tag Contents Here </c:if> Obviously, this tag won't compile because it's lacking the tag directive and the core library import. My point is that I want the "visible" property to default to TRUE. The "tag attribute is not required," so the "tag handler should provide a default value." I want to provide a default value, so what am I missing? Any help is greatly appreciated.

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  • custom grid style in silverlight 4

    - by Archie
    Hello, I want to set background of a grid using a style. I style I'm setting the Background Property of the grid. But I have a border filled with LinearGradientFill and a Path which also has LinearGradientFill in it. But I'm not able to combine both. Below is sample code. I want to create it as a style. <Grid> <Border BorderBrush="Black" BorderThickness="2"> <Border.Background> <LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5"> <GradientStop Color="Black" Offset="0.953" /> <GradientStop Color="White" Offset="0" /> </LinearGradientBrush> </Border.Background> </Border> <Path Data="M 0,0 C 0,620 10,10 560,0" Height="60" VerticalAlignment="Top"> <Path.Fill> <LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5"> <GradientStop Color="Black" Offset="0" /> <GradientStop Color="White" Offset="0.779" /> </LinearGradientBrush> </Path.Fill> </Path> </Grid> It gives me an error as The Property 'Value' is set more than once. Can anyone help me with it? Thanks.

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  • Custom Message Box in WPF - What project type?

    - by Tony
    I have a WPF Composite application and I want to create a customized messagebox, I wondered what project type I should use to create it? A usercontrol A WPF Application A Class Library I have to then be able to use this MessageBox in other places in my application.

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  • AutoRestart Custom Shell App

    - by MattH
    We have a .Net application that runs as a shell for certain users. We'd like the application to automatically restart when it crashes. The application is set as the shell here: HKEY_USERS*User*\Software\Microsoft\Windows NT\WinLogon\Shell I've tried adding an "AutoRestartShell" key with a value of "1", like what exists in: HKLM\Software\Microsoft\Windows NT\WinLogon. When I kill the application's process for the user (via RDP) the application exits, but never restarts. Ideas?

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  • Drupal : Custom views filter

    - by Joseph
    Hi, First thing I would say is that I am a Drupal newbie. So, I would appreciate your answer in a detailed step by step process. I am using Drupal 6 and location module. There are two main content types - user profile (using content profile module) and event content type. Both have one field for location. Now, lets suppose in his profile, user is selecting city as Toronto and province as Ontario. And some events have been added for Toronto city. I need one Views, which will display events from user city. So, if user is from Vancouver, and they click on "my city events", they will see list of events from their city. Someone told me that I can achieve this using arguments/ relationships, but I don't know how to do that. Can someone please help me out? I am not good at PHP either :(

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  • Adding custom validator without using Zend_Form's addElementPrefixPath

    - by nush
    The problem is that I don't use Zend_Form, so I can't use the built in capabilities. I usually look for three things when setting a validator: - its path (usually in library/path/validators/MyValidator.php) - its class name (tried Validators_MyValidator) and - in application.ini, the autoloaderNamespaces[] = "Validators" I've tried different settings/namings/layouts to no avail. When using a validator in my Zend_Validate_Input, an exception occurs, saying that it couldn't find my plugin/validator, the classes being searched only in Zend/Validate with the Zend_Validate prefix (I didn't try this prefix, though). Wasn't there a setting in app.ini that added a prefix and a path?

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  • [X]HTML custom tags: pros & cons

    - by o_O Tync
    I'd like to use some semantic [X]HTML tags instead of <div>s: <article>, <product>, <footer> etc. Some of them are already presented in the upcoming HTML5, however, it's not fully supported. Which are the possible cons I might face when Rendering? Using CSS, JS? The one I remember is: IE6 can't clone tags it doesn't know.

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  • Magento and unsetting a custom boolean attribute

    - by Spongeboy
    Hi, I've added an attribute to a customer address entity. Attribute setup code is as follows- 'entity_type_id'=>$customer_address_type_id, 'attribute_code'=>'signature_required', 'backend_type'=>'int', 'frontend_input'=>'boolean', 'frontend_label' => 'Signature required', 'is_global' => '1', 'is_visible' => '1', 'is_required' => '0', 'is_user_defined' => '0', I have then - added attribute to model\entity\setup.php added a HTML field on the edit form I am now getting the attribute saved to the database when the checkbox is checked. However, it is not being unset when checkbox is unchecked (I'm guessing due to checkbox input not being 'post'-ed if unchecked. What is the best way to uncheck this? Should I add a default value of 0? Or unset/delete the attribute before save in the controller? Should I add get/set methods to the model?

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  • Blackberry - custom logic for checkboxes group

    - by SWATI
    if i click on any checkbox all previous checkboxes must get checked "my logic works" if i uncheck a checkbox then all checkboxes after it must get unchecked "how to do that" MyLogic works for storm but not for other models what to do //well what i want to do is i have 5 checkboxes class myscreen { chk_service = new CheckboxField[5]; chk_service[0]= new CheckboxField("1",true) chk_service[1]= new CheckboxField("2",false) chk_service[2]= new CheckboxField("3",false) chk_service[3]= new CheckboxField("4",false) chk_service[4]= new CheckboxField("5",false) CheckboxFieldChangeListener obj = new CheckboxFieldChangeListener(chk_service); chk_service[0].setChangeListener(obj); chk_service[1].setChangeListener(obj); chk_service[2].setChangeListener(obj); chk_service[3].setChangeListener(obj); chk_service[4].setChangeListener(obj); hm4 = new HorizontalFieldManager(); hm4.add(chk_service[0]); hm4.add(chk_service[1]); hm4.add(chk_service[2]); hm4.add(chk_service[3]); hm4.add(chk_service[4]); add(hm4); } public CheckboxFieldChangeListener (CheckboxField[] arrFields) { m_arrFields = arrFields; } public void fieldChanged(Field field, int context) { if(true == ((CheckboxField) field).getChecked()) { for(int i = 0; i < m_arrFields.length; i++) { if(m_arrFields[i]==field) { //a[j]=i; j++; break; } else { CheckboxField oField = m_arrFields[i]; oField.setChecked(true); } } } a[k] = j; if(false == ((CheckboxField) field).getChecked()) { for(int i =field.getIndex(); i < m_arrFields.length; i++) { if(m_arrFields[i]==field) { //a[j]=i; j++; break; } else { CheckboxField oField = m_arrFields[i]; oField.setChecked(false); } } } } }

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  • ActionScript Custom Class With Return Type?

    - by TheDarkIn1978
    i just know this is a dumb question, so excuse me in advance. i want to essentially classify a simple function in it's own .as file. the function compares integers. but i don't know how to call the class and receive a boolean return. here's my class package { public class CompareInts { public function CompareInts(small:int, big:int) { compare(small, big); } private function compare(small:int, big:int):Boolean { if (small < big) return true; else return false; } } } so now i'd like to write something like this: if (CompareInts(1, 5) == true). or output 'true' by writing trace(CompareInts(1, 5));

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  • as3 custom functions

    - by pixeltocode
    why is it that every time moveSlide() is called, the values traced are the same? var slideWidth:Number = 680; var newPos:Number; function moveSlide () { var currentPos:Number = image_holder.x; newPos = currentPos + slideWidth; trace('currentPos ' + currentPos); trace('newPos ' + newPos); } moveSlide(); moveSlide(); moveSlide(); (image_holder is a movieclip with the images)

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  • HAProxy not passing SSL traffic in TCP mode (unknown protocol)

    - by David
    Hi, I've got a HAProxy LB solution setup and working correctly. All HTTP traffic on port 80 is being passed through succesfully. I'm now trying to get SSL traffic to work (in TCP mode and on just one server for now) however I keep getting the following error when testing via openssl: 26396:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:s23_clnt.c:588: However, when I try the same test (openssl s_client -connect) on the web servers IP address and hostname, everything seems to look OK. I can setup a hosts record locally and confirm that the browsers are picking up the SSL certificate succesfully for the domain. I guess this has led me to the conclusion that there is a problem at the HAProxy setup I have, so would really appreciate some advice here. frontend https-c-in bind 178.79.xxx.xxx:443 mode tcp default_backend c-https backend c-https balance source option ssl-hello-chk option httpclose server c-web-01 192.168.xxx.xxx:443 check inter 2000 rise 2 fall 5

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  • Unknown protocol when trying to connect to remote host wit stunnel

    - by RaYell
    I'm trying to set up a stunnel for WebDav on Windows. I want to connect 80 port on my local interface to 443 on another machine in my network. I can ping the machine remote machine. However when I use the tunnel, I'm getting this error all the time SSL state (accept): before/accept initialization SSL_accept: 140760FC: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol There is nothing in the logs on the other machine and here's my stunnel connection config [https] accept = 127.0.0.2:80 connect = 10.0.0.60:443 verify = 0 I've set it up to accept all certificates so this shouldn't be a problem with a self-signed certificate remote host uses. Does anyone knows what might be the problem that this connection cannot be eastablished?

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  • Alternate Client for Cisco Unified Personal Communicator protocol

    - by Jason M
    At work we have an in-house chat system using CUPC. Does anyone else out there use this? There are a few things I do not like about this client: Where's the chat log? If I close the window out, I have no way of getting my conversation back. Tabbed interface? That would be nice. I hate having multiple chat windows up, having to arrange them around my desktop as more people start talking to me. I don't like that I have to use this one-off application for this protocol when other chat clients will handle 99% of the other protocols I use. Tell me: Is the protcol an open standard for which other applications have support? (pidgin, adium, digsby, etc.) If not, can I overcome these issues from within CUPC? Perhaps there are newer versions of the client that overcome these issues.

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  • Konqueror on Windows XP : protocol not supported - man

    - by Michael Mao
    Hello everyone: I am new to the KDE and I am working all the time in a Windows XP environment. So I installed the KDE's Konqueror browser onto my laptop. The only reason for that is to allow me issue man:ls in the browser address bar and to get the man page displayed into the browser rather than printed inside the terminal. The problem is, I then get the error prompt saying that: protocol not supported man I guess something is wrong in the configuration, how to fix this problem? Many thanks in advance. The problem is definitely not the Konqueror browser, but is between the keyboard and the screen...

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  • Unknown protocol when trying to connect to remote host with stunnel

    - by RaYell
    I'm trying to set up a stunnel for WebDav on Windows. I want to connect 80 port on my local interface to 443 on another machine in my network. I can ping the machine remote machine. However when I use the tunnel, I'm getting this error all the time SSL state (accept): before/accept initialization SSL_accept: 140760FC: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol There is nothing in the logs on the other machine and here's my stunnel connection config [https] accept = 127.0.0.2:80 connect = 10.0.0.60:443 verify = 0 I've set it up to accept all certificates so this shouldn't be a problem with a self-signed certificate remote host uses. Does anyone knows what might be the problem that this connection cannot be eastablished?

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  • Remote desktop session ends abruptly with a "protocol error"

    - by Jon
    Intermittently we get a problem where a remote desktop session will get disconnected with the error message “Because of a protocol error, this session will be disconnected. Please try connecting to the remote computer again.” We are getting this with one server only which is running Windows Server 2008, connecting with Windows 7 clients. The session itself stays running, you just get disconnected, and you can try and reconnect. Sometimes you get in for a while then it will kick you out. We are connecting from Windows 7 clients. We have tried connecting using Cord on a Mac and this works fine, so it's not like the session itself is corrupted. One problem is that there are some critical applications running under the session (I know, let's not discuss the idiocy of that), so we cannot reset the session in any way during the working day – so any diagnostics must have minimum impact. Thanks, Jon

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  • Remote desktop session ends abruptly with a "protocol error"

    - by Jon
    Intermittently we get a problem where a remote desktop session will get disconnected with the error message “Because of a protocol error, this session will be disconnected. Please try connecting to the remote computer again.” We are getting this with one server only which is running Windows Server 2008, connecting with Windows 7 clients. The session itself stays running, you just get disconnected, and you can try and reconnect. Sometimes you get in for a while then it will kick you out. We are connecting from Windows 7 clients. We have tried connecting using Cord on a Mac and this works fine, so it's not like the session itself is corrupted. One problem is that there are some critical applications running under the session (I know, let's not discuss the idiocy of that), so we cannot reset the session in any way during the working day – so any diagnostics must have minimum impact. Thanks, Jon

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  • App / protocol to tune into live audio and video based on schedule or subscription

    - by Richard
    Many of us have embraced the podcasting revolution enabled by rss feeds and podcatchers. Alot of sites now broadcast live streams of what is eventually edited into a podcast. In most cases listening to the live stream gets you the info several days sooner then the podcast. So I was wondering if anybody knows of a notification protocol / app that allows me to auto tune into certain streams when they go live, or based on a schedule. I imagine twitter could be used for the notification but It'd be better not to be tied to a proprietary service. Example podcasts / live streams noagenda.squarespace.com jupiterbroadcasting.com twit.tv

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  • Subterranean IL: Pseudo custom attributes

    - by Simon Cooper
    Custom attributes were designed to make the .NET framework extensible; if a .NET language needs to store additional metadata on an item that isn't expressible in IL, then an attribute could be applied to the IL item to represent this metadata. For instance, the C# compiler uses DecimalConstantAttribute and DateTimeConstantAttribute to represent compile-time decimal or datetime constants, which aren't allowed in pure IL, and FixedBufferAttribute to represent fixed struct fields. How attributes are compiled Within a .NET assembly are a series of tables containing all the metadata for items within the assembly; for instance, the TypeDef table stores metadata on all the types in the assembly, and MethodDef does the same for all the methods and constructors. Custom attribute information is stored in the CustomAttribute table, which has references to the IL item the attribute is applied to, the constructor used (which implies the type of attribute applied), and a binary blob representing the arguments and name/value pairs used in the attribute application. For example, the following C# class: [Obsolete("Please use MyClass2", true)] public class MyClass { // ... } corresponds to the following IL class definition: .class public MyClass { .custom instance void [mscorlib]System.ObsoleteAttribute::.ctor(string, bool) = { string('Please use MyClass2' bool(true) } // ... } and results in the following entry in the CustomAttribute table: TypeDef(MyClass) MemberRef(ObsoleteAttribute::.ctor(string, bool)) blob -> {string('Please use MyClass2' bool(true)} However, there are some attributes that don't compile in this way. Pseudo custom attributes Just like there are some concepts in a language that can't be represented in IL, there are some concepts in IL that can't be represented in a language. This is where pseudo custom attributes come into play. The most obvious of these is SerializableAttribute. Although it looks like an attribute, it doesn't compile to a CustomAttribute table entry; it instead sets the serializable bit directly within the TypeDef entry for the type. This flag is fully expressible within IL; this C#: [Serializable] public class MySerializableClass {} compiles to this IL: .class public serializable MySerializableClass {} For those interested, a full list of pseudo custom attributes is available here. For the rest of this post, I'll be concentrating on the ones that deal with P/Invoke. P/Invoke attributes P/Invoke is built right into the CLR at quite a deep level; there are 2 metadata tables within an assembly dedicated solely to p/invoke interop, and many more that affect it. Furthermore, all the attributes used to specify p/invoke methods in C# or VB have their own keywords and syntax within IL. For example, the following C# method declaration: [DllImport("mscorsn.dll", SetLastError = true)] [return: MarshalAs(UnmanagedType.U1)] private static extern bool StrongNameSignatureVerificationEx( [MarshalAs(UnmanagedType.LPWStr)] string wszFilePath, [MarshalAs(UnmanagedType.U1)] bool fForceVerification, [MarshalAs(UnmanagedType.U1)] ref bool pfWasVerified); compiles to the following IL definition: .method private static pinvokeimpl("mscorsn.dll" lasterr winapi) bool marshal(unsigned int8) StrongNameSignatureVerificationEx( string marshal(lpwstr) wszFilePath, bool marshal(unsigned int8) fForceVerification, bool& marshal(unsigned int8) pfWasVerified) cil managed preservesig {} As you can see, all the p/invoke and marshal properties are specified directly in IL, rather than using attributes. And, rather than creating entries in CustomAttribute, a whole bunch of metadata is emitted to represent this information. This single method declaration results in the following metadata being output to the assembly: A MethodDef entry containing basic information on the method Four ParamDef entries for the 3 method parameters and return type An entry in ModuleRef to mscorsn.dll An entry in ImplMap linking ModuleRef and MethodDef, along with the name of the function to import and the pinvoke options (lasterr winapi) Four FieldMarshal entries containing the marshal information for each parameter. Phew! Applying attributes Most of the time, when you apply an attribute to an element, an entry in the CustomAttribute table will be created to represent that application. However, some attributes represent concepts in IL that aren't expressible in the language you're coding in, and can instead result in a single bit change (SerializableAttribute and NonSerializedAttribute), or many extra metadata table entries (the p/invoke attributes) being emitted to the output assembly.

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  • MPMoviePlayerController doesn't implement MPMediaPlayback protocol as advertised?

    - by goren
    I'm trying to use the MPMediaPlayback protocol's currentPlaybackRate() to slow down a video. I'm confused though as the class MPMoviePlayerController states that: You can control most aspects of playback programmatically using the methods and properties of the MPMediaPlayback protocol, to which this class conforms. Except just above in the header here: http://developer.apple.com/iphone/library/documentation/MediaPlayer/Reference/MPMoviePlayerController_Class/MPMoviePlayerController/MPMoviePlayerController.html it doesn't seem to. All I want to do is slow down the playback rate for a video.

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