TECH TO THE POINT

Issue: How to change  background color for all selected items in Android Fix: ( Xamarin  - c# syntax - Android should work with little change)      myListView . ItemClick   += ( sender ,   e )   = >   {                 myListView . GetChildAt (   e . Position ) . SetBackgroundColor (   Color . White ) ;                              } ; This will show the color change on all selected items. If you use myListView _ItemSlected event -> The color only shows like a highlight and when you select the next item the background color changes back to default.  

Issue: Laptop (in my case Asus) Touch Screen stopped working all of the sudden or after a windows update or mistakenly uninstalled an USB driver from device manager without knowing Touch screen driver is an USB interface. FIX: Info. in this post helped. http://answers.microsoft.com/en-us/windows/forum/windows_8-hardware/touch-screen-not-working-for-asus-laptop/57147530-21e4-4856-92ee-8795edaa8b03 In short, In Windows 8, Press Win Key + X  - > Select 'Control Panel' -> Search for 'Trouble shooting' -> Select 'Troubleshooting history' -> then select 'Troubleshooting' from top bar (part of path) -> Select 'Hardware and Sounds' -> Select 'Hardware and Devices'  - This will run the 'Find and Fix problems with the devices and hardware' - wizard .  - The wizard will popup 'Enable ... USB driver xxxxx ,  Apply this Fix?' - Select Apply this Fix. It might show this twice - Select apply this Fix. ...

ERROR: The name ‘Resource’ does not exist in the current context, CAUSE: - You tried to change namespaces in the project. Most of the time when you try to work with open source code  , you might like to change the naming convention relevant to your  project (depending on the license) . When you try to change namespace in the code, there are 3 major places it affects when compiling. In this  3 items are dynamically created . But they don't get modified if you make a major change like Namespace in your code. 1. Project default Namespace setting. 2. Resource.design.cs 3. obj/debug/ * 4. bin/debug/* FIX: Change the 'default namespace' setting in 'Projects' > [project name] Options - in general tab. Rebuild the project and if you get the same error again , open all the files (or Find and replace) the old Namespaces with new Namespace. Rebuild again this will create a new Resource.design.cs  If the Error occurs again - Open this file and verify...

Error: Android: Xamarin Studio: Cannot find: C:\Android\SDK\tools\..\platform-tools\aapt.exe Fix: 1. Check your Target Device / OS version you set up in the AndroidManifest.xml 2. Open the Android SDK Manager, see if that version is listed . 3. You may not have installed all the SDK versions of Android (like 13, 14, 15,16,17,18, 19,....) 4. This above error shows- You have installed an SDK , but but you donot have the ' platform SDK Build tools ' for the target version you have in your AndroidManifest.xml file. 5. From the list of plaform tools - install the version you need. The below picture shows the list of 'SDK Build tools' under 'Tools' in Android SDK Manager. (This shows  Android SDK Build-Tools for all the versions are installed )

ERROR:   Xamarin Studio: Execution Failed. Object reference not set to an instance of an object. ISSUE:  When you try to run your project by menu item 'Run Item' from Xamarin Studio project, the top middle status bar shows the above error. FIX: 1. Notice that in the top bar - the second dropdown is empty (Device list). 2. You have to set your project as a 'Set as Startup project' - (Right click on the project name to see this option in the popup menu) - This is the situation when you have or had multiple projects in the solution or running the project inside an existing solution. The 'Run' command needs to know what project to associate with what device.

ERROR:  No resource found that matches the given name (at background with value '@drawable/XxxXxx') FIX: Use all lower case when you specify the image file name in the Values / styles.xml. It doesn't matter if you have camel letters in the filename under the Resource Folder. Example:  Instead of this, < item   name = " android : windowBackground " > @drawable/ Splash < / item > Use, < item   name = " android : windowBackground " > @drawable/ splash < / item >

If you are starting with Graph Database from E-R modeling here is a  great short video shows to the point info about Graph Data modeling by Peter Bell. Use the Index on the Starting point . Use relationships for all others If you need Index on a property, break it into a NODE and add relationship to it. Use Relationships for all other queries Using sentences from graph or from Business stack holders to graph is a great way to communicate to the business people. Look out for missing Words , ex: Tom emailed to Sam - while Tom and Sam are Nodes and Emailed is an action, if you want to capture the things happen around the 'Email'  - add Tom - send  - Email - To - Sam. Check out his video at http://www.infoq.com/presentations/Data-Modeling-Graphs

ERROR: Visual Studio (also nuget error)  The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters http://visualstudio.uservoice.com/forums/121579-visual-studio/suggestions/2156195-fix-260-character-file-name-length-limitation FIX: Not an Error! Thats the feature of the world's best IDE - This is one big flaw in the IDE that Visual Studio conflicts with the Windows Operating system. The Windows OS supports long file path by default. VS couldn't support because the earlier developers applied this restriction in whole bunch of Windows sub products. oops. So, Change your file path, move the files and minimize the path length  to a simple (<260 charecters) directory , file path.

ERROR: npm WARN engine phonegap@2.9.0rc1-0.12.0: wanted: {"node":">=0.10.0"} (current: {"node":"v0.8.20","npm":"1.2.11"})   npm  Error: ENOENT phonegap\node_modules\shelljs\package.json FIX: As you see the warning itself shows version incompatibility. This warning further down will fire few errors with installing 'package.json' and others. Fixing the version of nodejs will fix the most errors. So install new version  for nodejs or update the nodejs with nvm .   npm cache clean - will not work in this case as the Nodejs 0.10.29 doesn't show install steps in the console unless you set it up. ERROR: “‘npm’ is not recognized as an internal or external command, operable program or batch file.”   FIX: --- Restart  the system. Some times the Path doesn't take effect until a restart in windows.

Error: Gpg4win - Kleopatra - Error Set up at least one ceterificate server FIX: This document shows details about PGP Certificate servers and how to set up one.    http://gpg4win.org/doc/en/gpg4win-compendium_22.html At the fist time you open the Kleopatra - Settings first row in the below window may be empty. Just 'CLICK THE NEW BUTTON' - it will automatically fill up this default certificate server  ( hkp://keys.gnupg.net   ) for you. The above document doesn't address this correctly. Great reference: http://www.gpg4win.org/ http://dev.mysql.com/doc/refman/5.6/en/checking-gpg-signature-windows.html

ERROR : While  installing Elastic Search / Tomcat / eclipse or any java apps you might get this error. 'JAVA_HOME variable to be set...' 'No Java virtual machine found ....' 'A java Runtime Environment (JRE) or Java Development kit (JDK) must be available in order to run 'Eclipse. No Java virtual machine was found after searching the following locations:C:\your program\jre\bin\' 'javaw.exe in your current PATH' - it occurs even if the JAVA_HOME - system variable is already set in the Environment variables. CAUSE : The applications using batch files to execute the jar files before even detecting the JAVA_HOME from the code, are looking for a javaw.exe to run the java code in the local path or in the global path (which is set in the system environment variables).  FIX : Add System Variables in Environment Variables in WIN 8 / WIN 7 do the following, Add   %JAVA_HOME%\bin    - to the PATH  - System Variable in the Environment Variable...

ISSUE: I wasted few minutes figuring out World's simplest simple issue 'drawing a single line' with 1pixel width and a color in html that looks same in at least 3 browsers ( Firefox, IE, Chrome ) I just want to do a simple  code like, < hr style = " color : #ff6a00 ; " >  - Firefox: Shows the line with given color but with a border. (Thats good. 4 Stars for Firefox team) - IE: Shows line with default 'gray' with default width - Chrome: Shows line with default 'gray' with default width   (depending on the browser you are looking - the above line will show as mentioned above) < hr style = " color : #ff6a00 ; height : 1 px ; border : 0 ; width : 100 % ; " >   All 3 Browsers: No Show - No line Even if you try increasing border and height,  < hr style = " color : #ff6a00 ; height : 1 0px ; border : 3px; width : 100 % ; " > it will not show the line. FIX:  You have to use the backgro...

OpenID Connect request is just 2 lines! OpenID 2.0 request is like 5-10 lines of code Simple Identity Layer on top of OAuth 2.0 REST and JSON instead of SOAP and XML No signatures (for lower levels of assurance Protocol Complexity, e.g. Message Format Authentication request in OpenID Connect  https://accounts.login.idm.telekom.com/oauth2/auth?response_type=code&client_id=MEDIAST ORE&scope=openid+profile+phone&redirect_uri=https%3A%2F%2Fsamtestt1.toon.sul.t-online.d e%2Fmedia-store%2Flogin%2F%3Fmode%3Doic Authentication request in OpenID 2.0  https://accounts.login.idm.telekom.com/idmip?openid.ns=http%3A%2F%2Fspecs.openid.net%2F auth%2F2.0&openid.claimed_id=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_se lect&openid.identity=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&ope nid.return_to=https%3A%2F%2Ffavoriten.t-online.de%2Fdashboard%2Fverification_openid.htm l%3FproviderId%3Dcdb-de&openid.realm=https%3A%2...

Issue :  Some of the Firefox or Mozilla application extension API s return  an enumerator object of type interface nsISimpleEnumerator ,  that result objects can not be used in a global scope and can not do iteration through the  list more than one time.   Cause: nsISimpleEnumerator  interface has only two methods hasMoreElements() getNext()   - There is no way to reset this enumerator to the first position once it is iterated through once. Like in this example given in Mozilla developer example page,  ( https://developer.mozilla.org/en-US/docs/Using_nsISimpleEnumerator )   var enumerator = document.getElementById('aStringBundleID').strings; var s = ""; while (enumerator.hasMoreElements()) { var property = enumerator.getNext().QueryInterface(Components.interfaces.nsIProperty); s += property.name + ' = ' + property.value + ';\n'; } If you want to reuse the 'enumerator' object again, in another place another loop, this wil...

Issue: When developing Firefox / Thunderbird Extensions , after copying your extension to the extensions folder, your extension doesn't appear in the Thunderbird / Firefox. Cause: Mozilla  apps can be installed under 3 profiles: 1. Single User : Extensions accessible by single user 2. Multi User:  You can setup multiple Firefox profiles still use the same profile folder : default for extensions. 3. Global : This is the installation folder itself. Extensions installed in this folder available for all the users have access to this folder. If your install option and the development extensions folders  differ , after restarting the application will not be to locate in the extensions folder it is looking for. FIX:   (Don't get confused with Window's user profile vs Firefox user profiles - they are different) If you had selected 'Single User' install , move your extension files/package  under your user profile Windows: %APPDATA%\Thunderbird\Profi...

Did you notice the new punch line from Oracle: Oracle and Java  - Create the Future .  A perfect motivation for the 21st century developers and  they've found a way to get into the nerves of the developers. Java 8 : Now supports Lambda expressions, finally.

Issue: No trace of  last year announced Online Team Foundation Service. What happened to it. www.tfs.visualstudio.com doesn't work any more. Fix: www.tfs.visualstudio.com is moved to www.visualstudio.com. Micorsoft has consolidated the Online Team Foundation Service as part Visual Studio Online Service and named 'Team Foundation Version Control'.

Issue: Most of the developers   don't use a  Source Control, Configuration Management and Team Collaboration system while developing small scale or even with the team. Source control which helps you to save lots of time from code loss by IDE crash or System crash. It Helps you to revert back to previous version or compare the versions at later point. Checking-in often to a Source Control  helps you avoid lots of  code commented out in the source in between working code. Also there is not an online service available for free . Most are free  only  for 'open  source projects' or you will have to pay. (Google code, codeplex, github, sourceforge, etc) Solution: Looks like Microsoft is taking a great move in the right direction to catch up with the rocket fast  tech World. Check out, a state of the art Source control online service is FREE for upto 5 users! (You can use with eclipse , android - any code you want, how cool is that?) L...

Error :   On the LHS of Jsfiddle.net below the  'Frameworks and Extensions' section,  if the dropdown option is set to Onload / OnDomreadey - the below code will not show any result.. <a href="#" id="dfddis"  onclick="Alertbox();">Alert</a> function Alertbox()          {              alert('The Alert!');                   } FIX Set the option in the dropdown menu to 'No wrap -<Body> ' / 'No wrap -< head>'. Yup! otherwise your body is messed up :( Reference http://jsfiddle.net/XPLr6/3/

Error: <a href="" id="dfddis" onclick="Alertbox();">Alert</a>       function Alertbox()          {              alert('The Alert!');                   }  - This will throw  {"error": "Please use POST request"} in jsFiddle.net Fix : Jquery tries to navigate to an empty target. A '#' will keep the link target within the same page / document. Use a '#' in the href.  <a href= "#"   id="dfddis" onclick="Alertbox();">Alert</a> Reference: http://jsfiddle.net/XPLr6/3/ 

Issue:  HASHBYTES ( algm, str) function generated hash code differ from regular/ other MD5 programs by the data type.  Data: 'mypassword1'  If you pass a variable as below as mentioned in the link in 'Ref' below,  DECLARE @HashThis nvarchar(4000); SELECT @HashThis = CONVERT(nvarchar(4000),'mypassword1'); SELECT HASHBYTES('MD5', @HashThis ); GO ---- This will generate a Hashed code :  0xBAE02911AA20CACE81224DCA98610B05 If you try the same in different MD5 generator tool like this website :  Type 'mypassword1' http://www.miraclesalad.com/webtools/md5.php ---- the generated Hashed code will be,  0d28e4080dc8f64fc9603639bb7aa1b9 Hashcodea are different. Cause: SQL Server differs the algorithm by the data type - here it is not just string , it is nvarchar / varchar - SQL Server adds up spaces or truncate them as to the size of the data. DECLARE @HashThis nvarchar(4000); SELECT @HashThis = CONVERT(nvarchar(4000),'mypassword...

Issue: Power Point (Version 2013) Background image is out of frame or image size doesn't fit within the Slide. Fix: > Select the background image. > Right click for context menu > Select 'Format Background' from menu > Format Background panel opens on the right side > Adjust the Offset X, Offset Y values (if you set them to 0 it fits to the frame)

In  IIS MMC  > Select site / Virtual Directory  > Select Features View  >  Select 'Authentication'  > Select top row 'Anonymous Authentication' >  In the right panel Select 'Edit'  > In the pop up window Select 'Application Pool Identity'   From  IIS 7 - ApplPoolIdentity (It is the default in IIS 8) is introduced  for the higher level of Application pool isolation in place of NetworkService. As more and more windows applications started to use NetworkService, AppPoolIdentity provides tighter security to your application pool from other application pool processes. http://technet.microsoft.com/library/hh831496.aspx#Anonymous

Error: azure project files not opening / Unsupported This version of Visual Studio does not have the following project types installed or does not support them. You can still open these projects in the version of Visual Studio in which they were originally created. Fix: Install Azure SDK (right version for your version of Visual Studio). Two  ways to install: 1. Download link: http://www.windowsazure.com/en-us/downloads/ 2. Visual Studio - Create NEW PROJECT ( ?!) - C# templates - Select ' Cloud ' - this shows 'Get Widnows Azure SDK' - Click 'OK' . This takes you to download page from embedded  browser!!!! (This is waste of time. Just do the first one.) Either way , you will have to Close all running Visual Stuido-s.

E-R Diagram :  Library Check In Check Out  E-R Diagram notations in SQL Management Studio or Visual Studio Architect :  Understanding following table relationships in a database schema diagram created from either SQL Management Studio or Visual Studio Architect:           Unlike other tools like Visio or Erwin, Microsoft uses 'Yellow Key' icon and a '8' or 'oo' icon that are shown at the both ends of a relationship lines connecting two tables . one to one (1:1)                    : 'Yellow Key icon' in both ends. one to many (1 : 0...*)          :  'Yellow Key icon' in one end and '8 icon' in other end many to many (0...* : 0...*)  : 'Yellow Key icon' in both ends. Below is an example E-R diagram created for an use ...