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  • jquery function val() is not equivalent to "$(this).value="??

    - by user323941
    When I try to set a text input to blank (when clicked) using (this).value="", this does not work. I have to use $(this).val(''). Why? What is the difference? what is the mechanism behind of val function in jQuery? quote: $(document).ready(function() { $('#user_name').focus( function(){$(this).val('');} ); }); //error code: not working... $(document).ready(function() { $('#user_name').focus( function(){$(this)value='';} ); });

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  • How do I return an object that is able to execute on the server?

    - by mafutrct
    Coming from a Java background, this is the way I'm thinking: The server provides an object to the client. This object should be able to execute on the server. Server: private string _S = "A"; public interface IFoo { void Bar(); } private class Foo : IFoo { void Bar() { _S = "B";} } public IFoo GetFoo() { return new Foo(); } Client: IFoo foo = serverChannel.GetFoo(); foo.Bar(); Remoting is legacy (everyone keeps pointing to WCF instead) and WCF does not support this at all basically ( http://stackoverflow.com/questions/2431510 ), so how should I implement this kind of behavior? Using 3rd party components is possible iff required. I searched on SO but found no similar question. If this has indeed been answered before, just let me know and I'll delete.

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  • How to get an item value of json using C#?

    - by user3487837
    How to get an item value of json using C#? json: [{ ID: '6512', fd: [{ titie: 'Graph-01', type: 'graph', views: { graph: { show: true, state: { group: 'DivisionName', series: ['FieldWeight', 'FactoryWeight', 'Variance'], graphType: 'lines-and-points' } } } }, { titie: 'Graph-02', type: 'Graph', views: { graph: { show: true, state: { group: 'DivisionName', series: ['FieldWeight', 'FactoryWeight', 'Variance'], graphType: 'lines-and-points' } } } }] }, { ID: '6506', fd: [{ titie: 'Map-01', type: 'map', views: { map: { show: true, state: { kpiField: 'P_BudgetAmount', kpiSlabs: [{ id: 'P_BudgetAmount', hues: ['#0fff03', '#eb0707'], scales: '10' }] } } } }] }] Above mentioned one is json, Here titie value will be get in a list please help me... my code is: string dashletsConfigPath = Url.Content("~/Content/Dashlets/Dashlets.json"); string jArray = System.IO.File.ReadAllText(Server.MapPath(dashletsConfigPath)) List<string> lists = new List<string>(); JArray list = JArray.Parse(jArray); var ll = list.Select(j => j["dashlets"]).ToList();

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  • Android-SQLite: How to Count specific value from Column?

    - by sanpatil
    I have two table (TABLE_EXAM,TABLE_RESULT). Here is value of my TABLE_RESULT. result_id exam_id question_id correct_answer 1 2 4 y 2 2 5 y 3 2 6 n 4 2 7 y I need to count how many correct_answer='y' where exam_id=2. I try following code but it return 0. public int calculateResult(int examId,String confirmAnswer) { int correctAnswer=0; try { SQLiteDatabase db=this.getWritableDatabase(); String selectQuery=("select count(correctAnswer) from result where exam_id ='" + examId + "' and correctAnswer ='" + 'y' +"'" ); // String selectQuery=("SELECT COUNT(*)FROM result WHERE exam_id ='" + examId + "' and correctAnswer ='" + confirmAnswer +"'" ); Cursor cursor = db.rawQuery(selectQuery, null); if(cursor.moveToLast()) { correctAnswer=cursor.getInt(3); } } catch(Exception e) { e.printStackTrace(); } return correctAnswer; } In variable confirm_answer i pass "y". Give me some hint or reference. Any help is appreciated. Thanks in Advance

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  • jquery ajax sucess - possible to return JSON instead of string?

    - by Haroldo
    To return an error from a $.ajax call, there's gotta be a better way than echoing an error in the ajax.php file and then trimming it! this seems very clumsy and in-robust: success: function(e){ var e = trim(e); if(e == 'SUCCESS') {alert('your password has been changed!');} if(e == 'ERROR1') {alert('please fill in all inputs!');} if(e == 'ERROR2') {alert('password incorrect!');} if(e == 'ERROR3') {alert('change failed!');} } what should i be doing instead?!

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  • Setting a form field's valule during validation

    - by LaundroMat
    Hi, I read about this issue already, but I'm having trouble understanding why I can't change the value of a form's field during validation. I have a form where a user can enter a decimal value. This value has to be higher than the initial value of the item the user is changing. During clean(), the value that was entered is checked against the item's previous value. I would like to be able to re-set the form field's value to the item's initial value when a user enters a lower value. Is this possible from within the clean() method, or am I forced to do this in the view? Somehow, it doesn't feel right to do this in the view... (To make matters more complicated, the form's fields are built up dynamically, meaning I have to override the form's clean() method instead of using the clean_() method). Thanks in advance!

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  • Interview Q: given an array of numbers, return array of products of all other numbers (no division)

    - by polygenelubricants
    I was asked this question in a job interview, and I'd like to know how others would solve it. I'm most comfortable with Java, but solutions in other languages are welcome. Given an array of numbers, nums, return an array of numbers products, where products[i] is the product of all nums[j], j != i. Input : [1, 2, 3, 4, 5] Output: [(2*3*4*5), (1*3*4*5), (1*2*4*5), (1*2*3*5), (1*2*3*4)] = [120, 60, 40, 30, 24] You must do this in O(N) without using division.

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  • How do database servers decide which order to return rows without any "order by" statements?

    - by Chris
    Kind of a whimsical question, always something I've wondered about and I figure knowing why it does what it does might deepen my understanding a bit. Let's say I do "SELECT TOP 10 * FROM TableName". In short timeframes, the same 10 rows come back, so it doesn't seem random. They weren't the first or last created. In my massive sample size of...one table, it isn't returning the min or max auto-incrementing primary key value. I also figure the problem gets more complex when taking joins into account. My database of choice is MSSQL, but I figure this might be an interesting question regardless of the platform.

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  • Why does `Array(0,1,2) == Array(0,1,2)` not return the expected result?

    - by soc
    As far as I understand, Scala's == defines the natural equality of two objects. I expected that Array(0,1,2) == Array(0,1,2) compares the natural equality e. g. checks if all elements of the array return true when compared with the corresponding elements of the other array. People told me that Scala's Array is just a Java [] which only compares identity. But Scala's String is also just a Java String but Scala overrides equals to compare natural equality. I wonder why Array's equals method was not overridden, too. Thank you for your thoughts!

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  • How to sort a hash by value in descending order and output a hash in ruby?

    - by tipsywacky
    output.sort_by {|k, v| v}.reverse and for keys h = {"a"=>1, "c"=>3, "b"=>2, "d"=>4} => {"a"=>1, "c"=>3, "b"=>2, "d"=>4} Hash[h.sort] Right now I have these two. But I'm trying to sort hash in descending order by value so that it will return => {"d"=>4, "c"=>3, "b"=>2, "a"=>1 } Thanks in advance. Edit: let me post the whole code. def count_words(str) # YOUR CODE HERE output = Hash.new(0) sentence = str.gsub(/,/, "").gsub(/'/,"").gsub(/-/, "").downcase words = sentence.split() words.each do |item| output[item] += 1 end puts Hash[output.sort_by{ |_, v| -v }] return Hash[output.sort_by{|k, v| v}.reverse] end

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  • Why does `Array.length`, `Function.length`, `String.length`, etc return 1?

    - by zealoushacker
    While teaching my JavaScript class yesterday, my students and I came across some interesting functionality that I thought might be worth capturing in a question and the answer I've come to. Typing Array.length in the JS console in chrome returns 1. Likewise, Function.length returns 1. This is important because: Every function in JavaScript is actually a Function object. (MDN JS Ref: Function) Thus, Object.length and likely all other native objects will and should return 1 as the value of the length property. So, finally why is this behavior occurring?

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  • WCF: Is there a way to return an object that is able to execute on the server?

    - by mafutrct
    Coming from a Java background, this is the way I'm thinking: The server provides an object to the client. This object should be able to execute on the server. Server: private string _S = "A"; public interface IFoo { void Bar(); } private class Foo : IFoo { void Bar() { _S = "B";} } public IFoo GetFoo() { return new Foo(); } Client: IFoo foo = serverChannel.GetFoo(); foo.Bar(); Is this possible? Or is my understanding wrong and this is not how it works in WCF? What would be a better design?

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  • SQL SERVER – Introduction to Extended Events – Finding Long Running Queries

    - by pinaldave
    The job of an SQL Consultant is very interesting as always. The month before, I was busy doing query optimization and performance tuning projects for our clients, and this month, I am busy delivering my performance in Microsoft SQL Server 2005/2008 Query Optimization and & Performance Tuning Course. I recently read white paper about Extended Event by SQL Server MVP Jonathan Kehayias. You can read the white paper here: Using SQL Server 2008 Extended Events. I also read another appealing chapter by Jonathan in the book, SQLAuthority Book Review – Professional SQL Server 2008 Internals and Troubleshooting. After reading these excellent notes by Jonathan, I decided to upgrade my course and include Extended Event as one of the modules. This week, I have delivered Extended Events session two times and attendees really liked the said course. They really think Extended Events is one of the most powerful tools available. Extended Events can do many things. I suggest that you read the white paper I mentioned to learn more about this tool. Instead of writing a long theory, I am going to write a very quick script for Extended Events. This event session captures all the longest running queries ever since the event session was started. One of the many advantages of the Extended Events is that it can be configured very easily and it is a robust method to collect necessary information in terms of troubleshooting. There are many targets where you can store the information, which include XML file target, which I really like. In the following Events, we are writing the details of the event at two locations: 1) Ringer Buffer; and 2) XML file. It is not necessary to write at both places, either of the two will do. -- Extended Event for finding *long running query* IF EXISTS(SELECT * FROM sys.server_event_sessions WHERE name='LongRunningQuery') DROP EVENT SESSION LongRunningQuery ON SERVER GO -- Create Event CREATE EVENT SESSION LongRunningQuery ON SERVER -- Add event to capture event ADD EVENT sqlserver.sql_statement_completed ( -- Add action - event property ACTION (sqlserver.sql_text, sqlserver.tsql_stack) -- Predicate - time 1000 milisecond WHERE sqlserver.sql_statement_completed.duration > 1000 ) -- Add target for capturing the data - XML File ADD TARGET package0.asynchronous_file_target( SET filename='c:\LongRunningQuery.xet', metadatafile='c:\LongRunningQuery.xem'), -- Add target for capturing the data - Ring Bugger ADD TARGET package0.ring_buffer (SET max_memory = 4096) WITH (max_dispatch_latency = 1 seconds) GO -- Enable Event ALTER EVENT SESSION LongRunningQuery ON SERVER STATE=START GO -- Run long query (longer than 1000 ms) SELECT * FROM AdventureWorks.Sales.SalesOrderDetail ORDER BY UnitPriceDiscount DESC GO -- Stop the event ALTER EVENT SESSION LongRunningQuery ON SERVER STATE=STOP GO -- Read the data from Ring Buffer SELECT CAST(dt.target_data AS XML) AS xmlLockData FROM sys.dm_xe_session_targets dt JOIN sys.dm_xe_sessions ds ON ds.Address = dt.event_session_address JOIN sys.server_event_sessions ss ON ds.Name = ss.Name WHERE dt.target_name = 'ring_buffer' AND ds.Name = 'LongRunningQuery' GO -- Read the data from XML File SELECT event_data_XML.value('(event/data[1])[1]','VARCHAR(100)') AS Database_ID, event_data_XML.value('(event/data[2])[1]','INT') AS OBJECT_ID, event_data_XML.value('(event/data[3])[1]','INT') AS object_type, event_data_XML.value('(event/data[4])[1]','INT') AS cpu, event_data_XML.value('(event/data[5])[1]','INT') AS duration, event_data_XML.value('(event/data[6])[1]','INT') AS reads, event_data_XML.value('(event/data[7])[1]','INT') AS writes, event_data_XML.value('(event/action[1])[1]','VARCHAR(512)') AS sql_text, event_data_XML.value('(event/action[2])[1]','VARCHAR(512)') AS tsql_stack, CAST(event_data_XML.value('(event/action[2])[1]','VARCHAR(512)') AS XML).value('(frame/@handle)[1]','VARCHAR(50)') AS handle FROM ( SELECT CAST(event_data AS XML) event_data_XML, * FROM sys.fn_xe_file_target_read_file ('c:\LongRunningQuery*.xet', 'c:\LongRunningQuery*.xem', NULL, NULL)) T GO -- Clean up. Drop the event DROP EVENT SESSION LongRunningQuery ON SERVER GO Just run the above query, afterwards you will find following result set. This result set contains the query that was running over 1000 ms. In our example, I used the XML file, and it does not reset when SQL services or computers restarts (if you are using DMV, it will reset when SQL services restarts). This event session can be very helpful for troubleshooting. Let me know if you want me to write more about Extended Events. I am totally fascinated with this feature, so I’m planning to acquire more knowledge about it so I can determine its other usages. Reference : Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, SQL, SQL Authority, SQL Optimization, SQL Performance, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, SQL Training, SQLServer, T SQL, Technology Tagged: SQL Extended Events

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  • Type Casting variables in PHP: Is there a practical example?

    - by Stephen
    PHP, as most of us know, has weak typing. For those who don't, PHP.net says: PHP does not require (or support) explicit type definition in variable declaration; a variable's type is determined by the context in which the variable is used. Love it or hate it, PHP re-casts variables on-the-fly. So, the following code is valid: $var = "10"; $value = 10 + $var; var_dump($value); // int(20) PHP also alows you to explicitly cast a variable, like so: $var = "10"; $value = 10 + $var; $value = (string)$value; var_dump($value); // string(2) "20" That's all cool... but, for the life of me, I cannot conceive of a practical reason for doing this. I don't have a problem with strong typing in languages that support it, like Java. That's fine, and I completely understand it. Also, I'm aware of—and fully understand the usefulness of—type hinting in function parameters. The problem I have with type casting is explained by the above quote. If PHP can swap types at-will, it can do so even after you force cast a type; and it can do so on-the-fly when you need a certain type in an operation. That makes the following valid: $var = "10"; $value = (int)$var; $value = $value . ' TaDa!'; var_dump($value); // string(8) "10 TaDa!" So what's the point? Can anyone show me a practical application or example of type casting—one that would fail if type casting were not involved? I ask this here instead of SO because I figure practicality is too subjective. Edit in response to Chris' comment Take this theoretical example of a world where user-defined type casting makes sense in PHP: You force cast variable $foo as int -- (int)$foo. You attempt to store a string value in the variable $foo. PHP throws an exception!! <--- That would make sense. Suddenly the reason for user defined type casting exists! The fact that PHP will switch things around as needed makes the point of user defined type casting vague. For example, the following two code samples are equivalent: // example 1 $foo = 0; $foo = (string)$foo; $foo = '# of Reasons for the programmer to type cast $foo as a string: ' . $foo; // example 2 $foo = 0; $foo = (int)$foo; $foo = '# of Reasons for the programmer to type cast $foo as a string: ' . $foo; UPDATE Guess who found himself using typecasting in a practical environment? Yours Truly. The requirement was to display money values on a website for a restaurant menu. The design of the site required that trailing zeros be trimmed, so that the display looked something like the following: Menu Item 1 .............. $ 4 Menu Item 2 .............. $ 7.5 Menu Item 3 .............. $ 3 The best way I found to do that wast to cast the variable as a float: $price = '7.50'; // a string from the database layer. echo 'Menu Item 2 .............. $ ' . (float)$price; PHP trims the float's trailing zeros, and then recasts the float as a string for concatenation.

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  • How to write simple code using TDD [migrated]

    - by adeel41
    Me and my colleagues do a small TDD-Kata practice everyday for 30 minutes. For reference this is the link for the excercise http://osherove.com/tdd-kata-1/ The objective is to write better code using TDD. This is my code which I've written public class Calculator { public int Add( string numbers ) { const string commaSeparator = ","; int result = 0; if ( !String.IsNullOrEmpty( numbers ) ) result = numbers.Contains( commaSeparator ) ? AddMultipleNumbers( GetNumbers( commaSeparator, numbers ) ) : ConvertToNumber( numbers ); return result; } private int AddMultipleNumbers( IEnumerable getNumbers ) { return getNumbers.Sum(); } private IEnumerable GetNumbers( string separator, string numbers ) { var allNumbers = numbers .Replace( "\n", separator ) .Split( new string[] { separator }, StringSplitOptions.RemoveEmptyEntries ); return allNumbers.Select( ConvertToNumber ); } private int ConvertToNumber( string number ) { return Convert.ToInt32( number ); } } and the tests for this class are [TestFixture] public class CalculatorTests { private int ArrangeAct( string numbers ) { var calculator = new Calculator(); return calculator.Add( numbers ); } [Test] public void Add_WhenEmptyString_Returns0() { Assert.AreEqual( 0, ArrangeAct( String.Empty ) ); } [Test] [Sequential] public void Add_When1Number_ReturnNumber( [Values( "1", "56" )] string number, [Values( 1, 56 )] int expected ) { Assert.AreEqual( expected, ArrangeAct( number ) ); } [Test] public void Add_When2Numbers_AddThem() { Assert.AreEqual( 3, ArrangeAct( "1,2" ) ); } [Test] public void Add_WhenMoreThan2Numbers_AddThemAll() { Assert.AreEqual( 6, ArrangeAct( "1,2,3" ) ); } [Test] public void Add_SeparatorIsNewLine_AddThem() { Assert.AreEqual( 6, ArrangeAct( @"1 2,3" ) ); } } Now I'll paste code which they have written public class StringCalculator { private const char Separator = ','; public int Add( string numbers ) { const int defaultValue = 0; if ( ShouldReturnDefaultValue( numbers ) ) return defaultValue; return ConvertNumbers( numbers ); } private int ConvertNumbers( string numbers ) { var numberParts = GetNumberParts( numbers ); return numberParts.Select( ConvertSingleNumber ).Sum(); } private string[] GetNumberParts( string numbers ) { return numbers.Split( Separator ); } private int ConvertSingleNumber( string numbers ) { return Convert.ToInt32( numbers ); } private bool ShouldReturnDefaultValue( string numbers ) { return String.IsNullOrEmpty( numbers ); } } and the tests [TestFixture] public class StringCalculatorTests { [Test] public void Add_EmptyString_Returns0() { ArrangeActAndAssert( String.Empty, 0 ); } [Test] [TestCase( "1", 1 )] [TestCase( "2", 2 )] public void Add_WithOneNumber_ReturnsThatNumber( string numberText, int expected ) { ArrangeActAndAssert( numberText, expected ); } [Test] [TestCase( "1,2", 3 )] [TestCase( "3,4", 7 )] public void Add_WithTwoNumbers_ReturnsSum( string numbers, int expected ) { ArrangeActAndAssert( numbers, expected ); } [Test] public void Add_WithThreeNumbers_ReturnsSum() { ArrangeActAndAssert( "1,2,3", 6 ); } private void ArrangeActAndAssert( string numbers, int expected ) { var calculator = new StringCalculator(); var result = calculator.Add( numbers ); Assert.AreEqual( expected, result ); } } Now the question is which one is better? My point here is that we do not need so many small methods initially because StringCalculator has no sub classes and secondly the code itself is so simple that we don't need to break it up too much that it gets confusing after having so many small methods. Their point is that code should read like english and also its better if they can break it up earlier than doing refactoring later and third when they will do refactoring it would be much easier to move these methods quite easily into separate classes. My point of view against is that we never made a decision that code is difficult to understand so why we are breaking it up so early. So I need a third person's opinion to understand which option is much better.

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  • Problems with moving 2D circle/box collision detection

    - by dario3004
    This is my first game ever and I'm a newbie in computer physics. I've got this code for the collision detection and it works fine for BOTTOM and TOP collision.It miss the collision detection with the paddle's edge and angles so I've (roughly) tried to implement it. Main method that is called for bouncing, it checks if it bounce with wall, or with top (+ right/left side) or with bottom (+ right/left side): protected void handleBounces(float px, float py) { handleWallBounce(px, py); if(mBall.y < getHeight()/4){ if (handleRedFastBounce(mRed, px, py)) return; if (handleRightSideBounce(mRed,px,py)) return; if (handleLeftSideBounce(mRed,px,py)) return; } if(mBall.y > getHeight()/4 * 3){ if (handleBlueFastBounce(mBlue, px, py)) return; if (handleRightSideBounce(mBlue,px,py)) return; if (handleLeftSideBounce(mBlue,px,py)) return; } } This is the code for the BOTTOM bounce: protected boolean handleRedFastBounce(Paddle paddle, float px, float py) { if (mBall.goingUp() == false) return false; // next position tx = mBall.x; ty = mBall.y - mBall.getRadius(); // actual position ptx = px; pty = py - mBall.getRadius(); dyp = ty - paddle.getBottom(); xc = tx + (tx - ptx) * dyp / (ty - pty); if ((ty < paddle.getBottom() && pty > paddle.getBottom() && xc > paddle.getLeft() && xc < paddle.getRight())) { mBall.x = xc; mBall.y = paddle.getBottom() + mBall.getRadius(); mBall.bouncePaddle(paddle); playSound(mPaddleSFX); increaseDifficulty(); return true; } else return false; } As long as I understood it should be something like this: So I tried to make the "left side" and "right side" bounce method: protected boolean handleLeftSideBounce(Paddle paddle, float px, float py){ // next position tx = mBall.x + mBall.getRadius(); ty = mBall.y; // actual position ptx = px + mBall.getRadius(); pty = py; dyp = tx - paddle.getLeft(); yc = ty + (pty - ty) * dyp / (ptx - tx); if (ptx < paddle.getLeft() && tx > paddle.getLeft()){ System.out.println("left side bounce1"); System.out.println("yc: " + yc + "top: " + paddle.getTop() + " bottom: " + paddle.getBottom()); if (yc > paddle.getTop() && yc < paddle.getBottom()){ System.out.println("left side bounce2"); mBall.y = yc; mBall.x = paddle.getLeft() - mBall.getRadius(); mBall.bouncePaddle(paddle); playSound(mPaddleSFX); increaseDifficulty(); return true; } } return false; } I think I'm quite near to the solution but I'm having big troubles with the new "yc" formula. I tried so many versions of it but since I don't know the theory behind it I can't adjust for the Y axis. Since the Y axis is inverted I even tried this: yc = ty - (pty - ty) * dyp / (ptx - tx); I tried Googling it but I can't seem to find a solution for it. Also this method fails when ball touches the angle and I don't think is a nice way because it just test "one" point of the ball and probably there will be many cases in which the ball won't bounce.

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  • Primefaces datatable in-cell edit to update other rows in the same datatable with ajax rowEdit event processing

    - by Java Thu
    I have issue to update other rows in the same datatable when one row updated using primeface datatable in-cell edit ajax rowEdit. But failed to update other row with ajax call. The ajax response only return the same row data which was updated. The codes are as following: <h:form id="testForm"> <p:dataTable id="testDT" var="d" rowIndexVar="rowIndex" value="#{testBean.lists}" editable="true"> <p:column> <f:facet name="header">No</f:facet> <h:outputText value="#{rowIndex}" /> </p:column> <p:column headerText="Value"> <p:cellEditor> <f:facet name="output"> <h:outputText value="#{d.value}" /> </f:facet> <f:facet name="input"> <p:inputText value="#{d.value}" size="5" /> </f:facet> </p:cellEditor> </p:column> <p:column headerText="Edit" style="width:50px"> <p:outputPanel rendered="#{d.editable}"> <p:rowEditor> </p:rowEditor> </p:outputPanel> </p:column> <p:ajax event="rowEdit" update=":testForm:testDT" listener="#{testBean.onRowUpdate}" /> </p:dataTable> </h:form> My TestBean: package web.bean.test; import java.util.ArrayList; import java.util.List; import javax.annotation.PostConstruct; import javax.faces.bean.ManagedBean; import javax.faces.bean.ViewScoped; import org.primefaces.event.RowEditEvent; @ManagedBean(name="testBean") @ViewScoped public class TestBean { private List<TestData> lists = new ArrayList<>(); @PostConstruct protected void init() { TestData d = new TestData("Row1Data", 1d, true); lists.add(d); d = new TestData("Row1Data", 11.11d, false); lists.add(d); } public void onRowUpdate(RowEditEvent event) { Object o = event.getObject(); if (o != null) { TestData d = (TestData)o; TestData d1 = lists.get(1); d1.setValue(d1.getValue() + d.getValue()); } } public List<TestData> getLists() { return lists; } public void setLists(List<TestData> lists) { this.lists = lists; } } package web.bean.test; public class TestData { private String name; private double value; private boolean editable; public TestData(String name, double value, boolean editable) { super(); this.name = name; this.value = value; this.editable = editable; } public TestData() { } public String getName() { return name; } public void setName(String name) { this.name = name; } public double getValue() { return value; } public void setValue(double value) { this.value = value; } public boolean isEditable() { return editable; } public void setEditable(boolean editable) { this.editable = editable; } } The ajax response body: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><link type="text/css" rel="stylesheet" href="/Octopus-G/javax.faces.resource/theme.css.xhtml?ln=primefaces-bluesky" /><link type="text/css" rel="stylesheet" href="/Octopus-G/javax.faces.resource/primefaces.css.xhtml?ln=primefaces&amp;v=3.2" /><script type="text/javascript" src="/Octopus-G/javax.faces.resource/jquery/jquery.js.xhtml?ln=primefaces&amp;v=3.2"></script><script type="text/javascript" src="/Octopus-G/javax.faces.resource/primefaces.js.xhtml?ln=primefaces&amp;v=3.2"></script></head><body> <form id="testForm" name="testForm" method="post" action="/Octopus-G/test.xhtml" enctype="application/x-www-form-urlencoded"> <input type="hidden" name="testForm" value="testForm" /> <div id="testForm:testDT" class="ui-datatable ui-widget"><table role="grid"><thead><tr role="row"><th id="testForm:testDT:j_idt5" class="ui-state-default" role="columnheader"><div class="ui-dt-c"><span>No</span></div></th><th id="testForm:testDT:j_idt8" class="ui-state-default" role="columnheader"><div class="ui-dt-c"><span>Value</span></div></th><th id="testForm:testDT:j_idt12" class="ui-state-default" role="columnheader" style="width:50px"><div class="ui-dt-c"><span>Edit</span></div></th></tr></thead><tfoot></tfoot><tbody id="testForm:testDT_data" class="ui-datatable-data ui-widget-content"><tr data-ri="0" class="ui-widget-content ui-datatable-even" role="row"><td role="gridcell"><div class="ui-dt-c">0</div></td><td role="gridcell" class="ui-editable-column"><div class="ui-dt-c"><span id="testForm:testDT:0:j_idt9" class="ui-cell-editor"><span class="ui-cell-editor-output">1.0</span><span class="ui-cell-editor-input"><input id="testForm:testDT:0:j_idt11" name="testForm:testDT:0:j_idt11" type="text" value="1.0" size="5" class="ui-inputfield ui-inputtext ui-widget ui-state-default ui-corner-all" /><script id="testForm:testDT:0:j_idt11_s" type="text/javascript">PrimeFaces.cw('InputText','widget_testForm_testDT_0_j_idt11',{id:'testForm:testDT:0:j_idt11'});</script></span></span></div></td><td role="gridcell" style="width:50px"><div class="ui-dt-c"><span id="testForm:testDT:0:j_idt13"><span id="testForm:testDT:0:j_idt14" class="ui-row-editor"><span class="ui-icon ui-icon-pencil"></span><span class="ui-icon ui-icon-check" style="display:none"></span><span class="ui-icon ui-icon-close" style="display:none"></span></span></span></div></td></tr><tr data-ri="1" class="ui-widget-content ui-datatable-odd" role="row"><td role="gridcell"><div class="ui-dt-c">1</div></td><td role="gridcell" class="ui-editable-column"><div class="ui-dt-c"><span id="testForm:testDT:1:j_idt9" class="ui-cell-editor"><span class="ui-cell-editor-output">11.11</span><span class="ui-cell-editor-input"><input id="testForm:testDT:1:j_idt11" name="testForm:testDT:1:j_idt11" type="text" value="11.11" size="5" class="ui-inputfield ui-inputtext ui-widget ui-state-default ui-corner-all" /><script id="testForm:testDT:1:j_idt11_s" type="text/javascript">PrimeFaces.cw('InputText','widget_testForm_testDT_1_j_idt11',{id:'testForm:testDT:1:j_idt11'});</script></span></span></div></td><td role="gridcell" style="width:50px"><div class="ui-dt-c"></div></td></tr></tbody></table></div><script id="testForm:testDT_s" type="text/javascript">$(function() {PrimeFaces.cw('DataTable','widget_testForm_testDT',{id:'testForm:testDT',editable:true,behaviors:{rowEdit:function(event) {PrimeFaces.ab({source:'testForm:testDT',process:'testForm:testDT',update:'testForm:testDT',event:'rowEdit'}, arguments[1]);}}});});</script><input type="hidden" name="javax.faces.ViewState" id="javax.faces.ViewState" value="-8223787210091934199:-360328890338571623" autocomplete="off" /> </form></body> </html>

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  • zk selecting combobox item programatically

    - by Abdul Khaliq
    Hi, I cannot set the value of combobox programatically can some one tell me what missing in the code public class Profile extends Window implements AfterCompose { @Override public void afterCompose() { Session session = Sessions.getCurrent(false); ApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext( (ServletContext) getDesktop().getWebApp().getNativeContext()); UsersDao usersDao = (UsersDao) ctx.getBean("daoUsers"); User user = (User) session.getAttribute("user"); user = usersDao.getUser(user.getUsername(),user.getPassword()); Textbox username_t = (Textbox) this.getFellow("username"); Textbox password_t = (Textbox) this.getFellow("password"); Textbox conpassword_t = (Textbox) this.getFellow("con_password"); Textbox firstname_t = (Textbox) this.getFellow("firstName"); Textbox lastname_t = (Textbox) this.getFellow("lastName"); Textbox email_t = (Textbox) this.getFellow("email"); Combobox hintQuestion_t = (Combobox) this.getFellow("hintQuestion"); Textbox hintAnswer_t = (Textbox) this.getFellow("hintAnswer"); Combobox locale_t = (Combobox) this.getFellow("locale"); Combobox authority_t = (Combobox) this.getFellow("authority"); username_t.setText(user.getUsername()); firstname_t.setText(user.getUserDetails().getFirstName()); lastname_t.setText(user.getUserDetails().getLastName()); email_t.setText(user.getUserDetails().getEmail()); Comboitem selectedItem = getSelectedIndexComboboxItem(hintQuestion_t, user.getHintQuestion()); hintQuestion_t.setSelectedItem(selectedItem); hintAnswer_t.setText(user.getHintAnswer()); selectedItem = getSelectedIndexComboboxItem(locale_t, user.getUserDetails().getLocale()); locale_t.setSelectedItem(selectedItem); selectedItem = getSelectedIndexComboboxItem(authority_t, ((Authority)user.getAuthorities().toArray()[0]).getRole()); authority_t.setSelectedItem(selectedItem); } private Comboitem getSelectedIndexComboboxItem(Combobox combobox, String value) { List<Comboitem> items = combobox.getItems(); Comboitem item = items.get(0); for (int i = 0; i < items.size(); i++) { Comboitem comboitem = items.get(i); String label = (String)comboitem.getLabel(); String cval = (String)comboitem.getValue(); if ((label!=null && label.equalsIgnoreCase(value)) || (cval != null && cval.equalsIgnoreCase(value))) { item = comboitem; break; } } return item; } } // zk file <window id="profile" use="com.jf.web.zk.ui.Profile"> <tabbox id="tabbox" width="40%" > <tabs> <tab label="Account Information"/> <tab label="Personal Information"/> <tab label="Contact Details"/> </tabs> <tabpanels> <tabpanel> <grid> <rows> <row> <label value="${i18nUtils.message('user.username')}"/> <hbox> <textbox id="username" />*,a-zA-Z,0-9 </hbox> </row> <row> <label value="${i18nUtils.message('user.password')}"/> <hbox> <textbox id="password" type="password"/>* </hbox> </row> <row> <label value="${i18nUtils.message('registration.user.password.confirm')}"/> <hbox> <textbox id="con_password" type="password"/>* </hbox> </row> <row> <label value="${i18nUtils.message('user.details.first.name')}"/> <hbox> <textbox id="firstName" type="text"/>* </hbox> </row> <row> <label value="${i18nUtils.message('user.details.last.name')}"/> <hbox> <textbox id="lastName" type="text"/>* </hbox> </row> <row> <label value="${i18nUtils.message('user.details.email')}"/> <hbox> <textbox id="email" type="text"/>* </hbox> </row> <row> <label value="${i18nUtils.message('user.hint.question')}"/> <hbox> <combobox id="hintQuestion" onCreate='self.setSelectedIndex(1);'> <comboitem label="${i18nUtils.message('user.hint.question.possible.value1')}" /> <comboitem label="${i18nUtils.message('user.hint.question.possible.value2')}" /> <comboitem label="${i18nUtils.message('user.hint.question.possible.value3')}" /> <comboitem label="${i18nUtils.message('user.hint.question.possible.value4')}" /> <comboitem label="${i18nUtils.message('user.hint.question.possible.value5')}" /> </combobox>* </hbox> </row> <row> <label value="${i18nUtils.message('user.hint.answer')}"/> <hbox> <textbox id="hintAnswer" type="text"/>* </hbox> </row> <row> <label value="${i18nUtils.message('user.details.locale')}"/> <hbox> <combobox id="locale" onCreate='self.setSelectedIndex(1);self.setReadonly(true);'> <comboitem label="${i18nUtils.message('user.details.locale.en')}" value="en_US"/> <comboitem label="${i18nUtils.message('user.details.locale.bg')}" value="bg_BG"/> </combobox>* </hbox> </row> <row> <label value="${i18nUtils.message('authority.account.type')}"/> <hbox> <combobox id="authority" onCreate='self.setSelectedIndex(0);self.setReadonly(true);'> <comboitem label="${i18nUtils.message('authority.job.seeker')}" value="Job Seeker"/> <comboitem label="${i18nUtils.message('authority.employer')}" value="Employer"/> <comboitem label="${i18nUtils.message('authority.hra')}" value="Human Resource Agency"/> <comboitem label="${i18nUtils.message('authority.advertiser')}" value="Advertiser"/> </combobox>* </hbox> </row> </rows> </grid> </tabpanel> </tabpanels> </tabbox> <grid width="40%"> <rows> <row> <button label="${i18nUtils.message('bttn.save')}" onClick="save()"/> <button label="${i18nUtils.message('bttn.cancel')}" onClick="cancel()"/> </row> </rows> </grid> </window> </zk> The "getSelectedIndexComboboxItem()" does return the correct selected item but there seems no effect on the UI. Like for example the locale is set to default Bulgarian language and I need to set it to English. Abdul Khaliq

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  • zk selecting combobox item programatically

    - by Abdul Khaliq
    I cannot set the value of combobox programatically can some one tell me what missing in the code public class Profile extends Window implements AfterCompose { @Override public void afterCompose() { Session session = Sessions.getCurrent(false); ApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext( (ServletContext) getDesktop().getWebApp().getNativeContext()); UsersDao usersDao = (UsersDao) ctx.getBean("daoUsers"); User user = (User) session.getAttribute("user"); user = usersDao.getUser(user.getUsername(),user.getPassword()); Textbox username_t = (Textbox) this.getFellow("username"); Textbox password_t = (Textbox) this.getFellow("password"); Textbox conpassword_t = (Textbox) this.getFellow("con_password"); Textbox firstname_t = (Textbox) this.getFellow("firstName"); Textbox lastname_t = (Textbox) this.getFellow("lastName"); Textbox email_t = (Textbox) this.getFellow("email"); Combobox hintQuestion_t = (Combobox) this.getFellow("hintQuestion"); Textbox hintAnswer_t = (Textbox) this.getFellow("hintAnswer"); Combobox locale_t = (Combobox) this.getFellow("locale"); Combobox authority_t = (Combobox) this.getFellow("authority"); username_t.setText(user.getUsername()); firstname_t.setText(user.getUserDetails().getFirstName()); lastname_t.setText(user.getUserDetails().getLastName()); email_t.setText(user.getUserDetails().getEmail()); Comboitem selectedItem = getSelectedIndexComboboxItem(hintQuestion_t, user.getHintQuestion()); hintQuestion_t.setSelectedItem(selectedItem); hintAnswer_t.setText(user.getHintAnswer()); selectedItem = getSelectedIndexComboboxItem(locale_t, user.getUserDetails().getLocale()); locale_t.setSelectedItem(selectedItem); selectedItem = getSelectedIndexComboboxItem(authority_t, ((Authority)user.getAuthorities().toArray()[0]).getRole()); authority_t.setSelectedItem(selectedItem); } private Comboitem getSelectedIndexComboboxItem(Combobox combobox, String value) { List<Comboitem> items = combobox.getItems(); Comboitem item = items.get(0); for (int i = 0; i < items.size(); i++) { Comboitem comboitem = items.get(i); String label = (String)comboitem.getLabel(); String cval = (String)comboitem.getValue(); if ((label!=null && label.equalsIgnoreCase(value)) || (cval != null && cval.equalsIgnoreCase(value))) { item = comboitem; break; } } return item; } } // zk file <window id="profile" use="com.jf.web.zk.ui.Profile"> <tabbox id="tabbox" width="40%" > <tabs> <tab label="Account Information"/> <tab label="Personal Information"/> <tab label="Contact Details"/> </tabs> <tabpanels> <tabpanel> <grid> <rows> <row> <label value="${i18nUtils.message('user.username')}"/> <hbox> <textbox id="username" />*,a-zA-Z,0-9 </hbox> </row> <row> <label value="${i18nUtils.message('user.password')}"/> <hbox> <textbox id="password" type="password"/>* </hbox> </row> <row> <label value="${i18nUtils.message('registration.user.password.confirm')}"/> <hbox> <textbox id="con_password" type="password"/>* </hbox> </row> <row> <label value="${i18nUtils.message('user.details.first.name')}"/> <hbox> <textbox id="firstName" type="text"/>* </hbox> </row> <row> <label value="${i18nUtils.message('user.details.last.name')}"/> <hbox> <textbox id="lastName" type="text"/>* </hbox> </row> <row> <label value="${i18nUtils.message('user.details.email')}"/> <hbox> <textbox id="email" type="text"/>* </hbox> </row> <row> <label value="${i18nUtils.message('user.hint.question')}"/> <hbox> <combobox id="hintQuestion" onCreate='self.setSelectedIndex(1);'> <comboitem label="${i18nUtils.message('user.hint.question.possible.value1')}" /> <comboitem label="${i18nUtils.message('user.hint.question.possible.value2')}" /> <comboitem label="${i18nUtils.message('user.hint.question.possible.value3')}" /> <comboitem label="${i18nUtils.message('user.hint.question.possible.value4')}" /> <comboitem label="${i18nUtils.message('user.hint.question.possible.value5')}" /> </combobox>* </hbox> </row> <row> <label value="${i18nUtils.message('user.hint.answer')}"/> <hbox> <textbox id="hintAnswer" type="text"/>* </hbox> </row> <row> <label value="${i18nUtils.message('user.details.locale')}"/> <hbox> <combobox id="locale" onCreate='self.setSelectedIndex(1);self.setReadonly(true);'> <comboitem label="${i18nUtils.message('user.details.locale.en')}" value="en_US"/> <comboitem label="${i18nUtils.message('user.details.locale.bg')}" value="bg_BG"/> </combobox>* </hbox> </row> <row> <label value="${i18nUtils.message('authority.account.type')}"/> <hbox> <combobox id="authority" onCreate='self.setSelectedIndex(0);self.setReadonly(true);'> <comboitem label="${i18nUtils.message('authority.job.seeker')}" value="Job Seeker"/> <comboitem label="${i18nUtils.message('authority.employer')}" value="Employer"/> <comboitem label="${i18nUtils.message('authority.hra')}" value="Human Resource Agency"/> <comboitem label="${i18nUtils.message('authority.advertiser')}" value="Advertiser"/> </combobox>* </hbox> </row> </rows> </grid> </tabpanel> </tabpanels> </tabbox> <grid width="40%"> <rows> <row> <button label="${i18nUtils.message('bttn.save')}" onClick="save()"/> <button label="${i18nUtils.message('bttn.cancel')}" onClick="cancel()"/> </row> </rows> </grid> </window> </zk> The "getSelectedIndexComboboxItem()" does return the correct selected item but there seems no effect on the UI. Like for example the locale is set to default Bulgarian language and I need to set it to English. Abdul Khaliq

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  • Losing jQuery functionality after postback

    - by David Lozzi
    I have seen a TON of people reporting this issue online, but no actual solutions. I'm not using AJAX or updatepanels, just a dropdown that posts back on selected index change. My HTML is <div id="myList"> <table id="ctl00_PlaceHolderMain_dlFields" cellspacing="0" border="0" style="border-collapse:collapse;"> <tr> <td> <tr> <td class="ms-formlabel" style="width: 175px; padding-left: 10px"> <span id="ctl00_PlaceHolderMain_dlFields_ctl00_lblDestinationField">Body</span> </td> <td class="ms-formbody" style="width: 485px"> <input name="ctl00$PlaceHolderMain$dlFields$ctl00$txtSource" type="text" id="ctl00_PlaceHolderMain_dlFields_ctl00_txtSource" class="ms-input" style="width:230px" /> <select name="ctl00$PlaceHolderMain$dlFields$ctl00$ddlSourceFields" id="ctl00_PlaceHolderMain_dlFields_ctl00_ddlSourceFields" class="ms-input"> <option value="Some Field Name 1">Some Field Name 1</option> <option value="Some Field Name 2">Some Field Name 2</option> <option value="Some Field Name 3">Some Field Name 3</option> <option value="Some Field Name 4">Some Field Name 4</option> </select> <a href="#" id="appendSelect">append</a> </td> </tr> </td> </tr><tr> <td> <tr> <td class="ms-formlabel" style="width: 175px; padding-left: 10px"> <span id="ctl00_PlaceHolderMain_dlFields_ctl01_lblDestinationField">Expires</span> </td> <td class="ms-formbody" style="width: 485px"> <input name="ctl00$PlaceHolderMain$dlFields$ctl01$txtSource" type="text" id="ctl00_PlaceHolderMain_dlFields_ctl01_txtSource" class="ms-input" style="width:230px" /> <select name="ctl00$PlaceHolderMain$dlFields$ctl01$ddlSourceFields" id="ctl00_PlaceHolderMain_dlFields_ctl01_ddlSourceFields" class="ms-input"> <option value="Some Field Name 1">Some Field Name 1</option> <option value="Some Field Name 2">Some Field Name 2</option> <option value="Some Field Name 3">Some Field Name 3</option> <option value="Some Field Name 4">Some Field Name 4</option> </select> <a href="#" id="appendSelect">append</a> </td> </tr> </td> </tr><tr> <td> <tr> <td class="ms-formlabel" style="width: 175px; padding-left: 10px"> <span id="ctl00_PlaceHolderMain_dlFields_ctl02_lblDestinationField">Title</span> </td> <td class="ms-formbody" style="width: 485px"> <input name="ctl00$PlaceHolderMain$dlFields$ctl02$txtSource" type="text" id="ctl00_PlaceHolderMain_dlFields_ctl02_txtSource" class="ms-input" style="width:230px" /> <select name="ctl00$PlaceHolderMain$dlFields$ctl02$ddlSourceFields" id="ctl00_PlaceHolderMain_dlFields_ctl02_ddlSourceFields" class="ms-input"> <option value="Some Field Name 1">Some Field Name 1</option> <option value="Some Field Name 2">Some Field Name 2</option> <option value="Some Field Name 3">Some Field Name 3</option> <option value="Some Field Name 4">Some Field Name 4</option> </select> <a href="#" id="appendSelect">append</a> </td> </tr> </td> </tr> </table></div> The above Div tag is static, and the table is generated from a DataList object. On postback the datalist reloads using a new dataset, for example <div id="myList"> <table id="ctl00_PlaceHolderMain_dlFields" cellspacing="0" border="0" style="border-collapse:collapse;"> <tr> <td> <tr> <td class="ms-formlabel" style="width: 175px; padding-left: 10px"> <span id="ctl00_PlaceHolderMain_dlFields_ctl00_lblDestinationField">Notes</span> </td> <td class="ms-formbody" style="width: 485px"> <input name="ctl00$PlaceHolderMain$dlFields$ctl00$txtSource" type="text" id="ctl00_PlaceHolderMain_dlFields_ctl00_txtSource" class="ms-input" style="width:230px" /> <select name="ctl00$PlaceHolderMain$dlFields$ctl00$ddlSourceFields" id="ctl00_PlaceHolderMain_dlFields_ctl00_ddlSourceFields" class="ms-input"> <option value="Some Field Name 1">Some Field Name 1</option> <option value="Some Field Name 2">Some Field Name 2</option> <option value="Some Field Name 3">Some Field Name 3</option> <option value="Some Field Name 4">Some Field Name 4</option> </select> <a href="#" id="appendSelect">append</a> </td> </tr> </td> </tr><tr> <td> <tr> <td class="ms-formlabel" style="width: 175px; padding-left: 10px"> <span id="ctl00_PlaceHolderMain_dlFields_ctl01_lblDestinationField">URL</span> </td> <td class="ms-formbody" style="width: 485px"> <input name="ctl00$PlaceHolderMain$dlFields$ctl01$txtSource" type="text" id="ctl00_PlaceHolderMain_dlFields_ctl01_txtSource" class="ms-input" style="width:230px" /> <select name="ctl00$PlaceHolderMain$dlFields$ctl01$ddlSourceFields" id="ctl00_PlaceHolderMain_dlFields_ctl01_ddlSourceFields" class="ms-input"> <option value="Some Field Name 1">Some Field Name 1</option> <option value="Some Field Name 2">Some Field Name 2</option> <option value="Some Field Name 3">Some Field Name 3</option> <option value="Some Field Name 4">Some Field Name 4</option> </select> <a href="#" id="appendSelect">append</a> </td> </tr> </td> </tr> </table></div> After the postback and the datalist is reloaded, my JQuery doesn't work anymore. No errors, nothing. I don't see any actual changes in the objects in the HTML that should cause this. How do I fix this? Any workarounds or bandaides I can apply? My JQuery is below <script type='text/javascript'> $(document).ready(function () { $('#myList a').live("click", function () { var $selectValue = $(this).siblings('select').val(); var $thatInput = $(this).siblings('input'); var val = $thatInput.val() + ' |[' + $selectValue + ']|'; $thatInput.val(jQuery.trim(val)); }) }); </script> Thanks!!

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  • Why doesn't the value in /proc/meminfo seem to map exactly to the system RAM?

    - by Eric Asberry
    The values in /proc/meminfo for MemTotal don't make sense. As a human, eyeballing it, it seems to roughly correspond to the installed RAM, but for using it to display the installed RAM from an automated utility it appears to be inexact, and inconsistent. For a system with 1G of RAM, I would expect the MemTotal line to have a value of 1048576 - 1024*1024. But instead, I'm seeing 1029392. On another 4G box, I'm seeing 3870172, which is not a multiple of 1024, and it's not even close to 1029392*4. On an 8G box, I get 8128204, which again seems to have no correlation to the other values, nor is it a multiple of 1024. I'm trying to use this information to report the RAM on a status web page. My work-around is to just "round" it to the nearest 1G multiple, but I'd like to understand why these values seem inconsistent and don't match my expectations. Can somebody fill me in on what I'm missing here? EDIT: To expand on the accepted answer below.... The reference can be found here. Also of interest to me from that page, which explains the inconsistency, is this bit: meminfo: Provides information about distribution and utilization of memory. This varies by architecture and compile options. ...

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  • Maintaining shared service in ASP.NET MVC Application

    - by kazimanzurrashid
    Depending on the application sometimes we have to maintain some shared service throughout our application. Let’s say you are developing a multi-blog supported blog engine where both the controller and view must know the currently visiting blog, it’s setting , user information and url generation service. In this post, I will show you how you can handle this kind of case in most convenient way. First, let see the most basic way, we can create our PostController in the following way: public class PostController : Controller { public PostController(dependencies...) { } public ActionResult Index(string blogName, int? page) { BlogInfo blog = blogSerivce.FindByName(blogName); if (blog == null) { return new NotFoundResult(); } IEnumerable<PostInfo> posts = postService.FindPublished(blog.Id, PagingCalculator.StartIndex(page, blog.PostPerPage), blog.PostPerPage); int count = postService.GetPublishedCount(blog.Id); UserInfo user = null; if (HttpContext.User.Identity.IsAuthenticated) { user = userService.FindByName(HttpContext.User.Identity.Name); } return View(new IndexViewModel(urlResolver, user, blog, posts, count, page)); } public ActionResult Archive(string blogName, int? page, ArchiveDate archiveDate) { BlogInfo blog = blogSerivce.FindByName(blogName); if (blog == null) { return new NotFoundResult(); } IEnumerable<PostInfo> posts = postService.FindArchived(blog.Id, archiveDate, PagingCalculator.StartIndex(page, blog.PostPerPage), blog.PostPerPage); int count = postService.GetArchivedCount(blog.Id, archiveDate); UserInfo user = null; if (HttpContext.User.Identity.IsAuthenticated) { user = userService.FindByName(HttpContext.User.Identity.Name); } return View(new ArchiveViewModel(urlResolver, user, blog, posts, count, page, achiveDate)); } public ActionResult Tag(string blogName, string tagSlug, int? page) { BlogInfo blog = blogSerivce.FindByName(blogName); if (blog == null) { return new NotFoundResult(); } TagInfo tag = tagService.FindBySlug(blog.Id, tagSlug); if (tag == null) { return new NotFoundResult(); } IEnumerable<PostInfo> posts = postService.FindPublishedByTag(blog.Id, tag.Id, PagingCalculator.StartIndex(page, blog.PostPerPage), blog.PostPerPage); int count = postService.GetPublishedCountByTag(tag.Id); UserInfo user = null; if (HttpContext.User.Identity.IsAuthenticated) { user = userService.FindByName(HttpContext.User.Identity.Name); } return View(new TagViewModel(urlResolver, user, blog, posts, count, page, tag)); } } As you can see the above code heavily depends upon the current blog and the blog retrieval code is duplicated in all of the action methods, once the blog is retrieved the same blog is passed in the view model. Other than the blog the view also needs the current user and url resolver to render it properly. One way to remove the duplicate blog retrieval code is to create a custom model binder which converts the blog from a blog name and use the blog a parameter in the action methods instead of the string blog name, but it only helps the first half in the above scenario, the action methods still have to pass the blog, user and url resolver etc in the view model. Now lets try to improve the the above code, first lets create a new class which would contain the shared services, lets name it as BlogContext: public class BlogContext { public BlogInfo Blog { get; set; } public UserInfo User { get; set; } public IUrlResolver UrlResolver { get; set; } } Next, we will create an interface, IContextAwareService: public interface IContextAwareService { BlogContext Context { get; set; } } The idea is, whoever needs these shared services needs to implement this interface, in our case both the controller and the view model, now we will create an action filter which will be responsible for populating the context: public class PopulateBlogContextAttribute : FilterAttribute, IActionFilter { private static string blogNameRouteParameter = "blogName"; private readonly IBlogService blogService; private readonly IUserService userService; private readonly BlogContext context; public PopulateBlogContextAttribute(IBlogService blogService, IUserService userService, IUrlResolver urlResolver) { Invariant.IsNotNull(blogService, "blogService"); Invariant.IsNotNull(userService, "userService"); Invariant.IsNotNull(urlResolver, "urlResolver"); this.blogService = blogService; this.userService = userService; context = new BlogContext { UrlResolver = urlResolver }; } public static string BlogNameRouteParameter { [DebuggerStepThrough] get { return blogNameRouteParameter; } [DebuggerStepThrough] set { blogNameRouteParameter = value; } } public void OnActionExecuting(ActionExecutingContext filterContext) { string blogName = (string) filterContext.Controller.ValueProvider.GetValue(BlogNameRouteParameter).ConvertTo(typeof(string), Culture.Current); if (!string.IsNullOrWhiteSpace(blogName)) { context.Blog = blogService.FindByName(blogName); } if (context.Blog == null) { filterContext.Result = new NotFoundResult(); return; } if (filterContext.HttpContext.User.Identity.IsAuthenticated) { context.User = userService.FindByName(filterContext.HttpContext.User.Identity.Name); } IContextAwareService controller = filterContext.Controller as IContextAwareService; if (controller != null) { controller.Context = context; } } public void OnActionExecuted(ActionExecutedContext filterContext) { Invariant.IsNotNull(filterContext, "filterContext"); if ((filterContext.Exception == null) || filterContext.ExceptionHandled) { IContextAwareService model = filterContext.Controller.ViewData.Model as IContextAwareService; if (model != null) { model.Context = context; } } } } As you can see we are populating the context in the OnActionExecuting, which executes just before the controllers action methods executes, so by the time our action methods executes the context is already populated, next we are are assigning the same context in the view model in OnActionExecuted method which executes just after we set the  model and return the view in our action methods. Now, lets change the view models so that it implements this interface: public class IndexViewModel : IContextAwareService { // More Codes } public class ArchiveViewModel : IContextAwareService { // More Codes } public class TagViewModel : IContextAwareService { // More Codes } and the controller: public class PostController : Controller, IContextAwareService { public PostController(dependencies...) { } public BlogContext Context { get; set; } public ActionResult Index(int? page) { IEnumerable<PostInfo> posts = postService.FindPublished(Context.Blog.Id, PagingCalculator.StartIndex(page, Context.Blog.PostPerPage), Context.Blog.PostPerPage); int count = postService.GetPublishedCount(Context.Blog.Id); return View(new IndexViewModel(posts, count, page)); } public ActionResult Archive(int? page, ArchiveDate archiveDate) { IEnumerable<PostInfo> posts = postService.FindArchived(Context.Blog.Id, archiveDate, PagingCalculator.StartIndex(page, Context.Blog.PostPerPage), Context.Blog.PostPerPage); int count = postService.GetArchivedCount(Context.Blog.Id, archiveDate); return View(new ArchiveViewModel(posts, count, page, achiveDate)); } public ActionResult Tag(string blogName, string tagSlug, int? page) { TagInfo tag = tagService.FindBySlug(Context.Blog.Id, tagSlug); if (tag == null) { return new NotFoundResult(); } IEnumerable<PostInfo> posts = postService.FindPublishedByTag(Context.Blog.Id, tag.Id, PagingCalculator.StartIndex(page, Context.Blog.PostPerPage), Context.Blog.PostPerPage); int count = postService.GetPublishedCountByTag(tag.Id); return View(new TagViewModel(posts, count, page, tag)); } } Now, the last thing where we have to glue everything, I will be using the AspNetMvcExtensibility to register the action filter (as there is no better way to inject the dependencies in action filters). public class RegisterFilters : RegisterFiltersBase { private static readonly Type controllerType = typeof(Controller); private static readonly Type contextAwareType = typeof(IContextAwareService); protected override void Register(IFilterRegistry registry) { TypeCatalog controllers = new TypeCatalogBuilder() .Add(GetType().Assembly) .Include(type => controllerType.IsAssignableFrom(type) && contextAwareType.IsAssignableFrom(type)); registry.Register<PopulateBlogContextAttribute>(controllers); } } Thoughts and Comments?

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