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• How can I handle this kind of exceptions (in Doctrine)

  - by ppavlovic

  Can you tell me how can I handle this kind of exceptions: Fatal error: Uncaught exception 'Doctrine_Connection_Exception' with message 'PDO Connection Error: SQLSTATE[HY000] [2013] Lost connection to MySQL server at 'reading initial communication packet', system error: 110' in ... It happens when connection with MySQL is lost during query. I need to handle this exception so I can show 500 error page so the crawlers do not cache page, and to redirect user to appropriate "Try again" page. P.S. I have a lot's of code, so I can not go trough all code to put try/catch block. I need something simple and yet effective.

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• Adding A New Row Using SQL Server Management Studio

  - by Soo

  I'm learning how to use SQL Server Management Studio and can't figure out how to insert a new row into a table. Table Structure: ID, Field1, Field2 Query: INSERT INTO Table (Field1,Field2) VALUES(1,2) Error: Major Error 0x80040E14, Minor Error 25503 I'm probably missing something very noobie like. Any help would be appreciated.

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• Visual Studio 2008 - .NET 2.0 targeted application won't run in XP (mscorwks.dll could not be loaded

  - by Alan Spark

  I have a .NET 2.0 targeted C# windows forms application that is running fine on XP when .NET 3.5 is installed. However, when .NET 2.0 only is installed I get the error: "WindowsFormsApplication1.exe - .NET Framework Initialization Error" - "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorwks.dll could not be loaded" I have tried this with a basic default windows forms application and encounter this error on XP SP1, SP2 and SP3 with .NET 2.0 installed. Could there be some other step that I am missing?

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• Passing template into boost function

  - by Ockonal

  template <class EventType> class IEvent; class IEventable; typedef boost::function<void (IEventable&, IEvent&)> behaviorRef; What is the right way for passing template class IEvent into boost function? With this code I get: error: functional cast expression list treated as compound expression error: template argument 1 is invalid error: invalid type in declaration before ‘;’ token

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• jQuery/JSON/PHP failing

  - by user730936

  I am trying to call a php script that accepts JSON data, writes it into a file and returns simple text response using jQuery/AJAX call. jQuery code : $("input.callphp").click(function() { var url_file = myurl"; $.ajax({type : "POST", url : url_file, data : {'puzzle': 'Reset!'}, success : function(data){ alert("Success: " + data); }, error : function (data) { alert("Error: " + data); }, dataType : 'text' }); }); PHP Code : <?php $thefile = "new.json"; /* Our filename as defined earlier */ $towrite = $_POST["puzzle"]; /* What we'll write to the file */ $openedfile = fopen($thefile, "w"); fwrite($openedfile, $towrite); fclose($openedfile); echo "<br> <br>".$towrite; ?> However, the call is never a success and always gives an error with an alert "Error : [Object object]".

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• How to read file.xml from resources to NSString with format?

  - by falkon

  Actually I have such a code: NSString *path = [[NSBundle mainBundle] pathForResource: @"connect" ofType: @"xml"]; NSError *error = nil; NSString *data = [NSString stringWithContentsOfFile: path encoding: NSUTF8StringEncoding error: &error]; NSString *message = [NSString stringWithFormat:data, KEY, COUNTRY_ID]; which reads the connect.xml from resources. But on the formating the string (message) APP quits without displaying any errors. How can I read file.xml from resources to NSString with format?

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• Makefile won't copy .o to obj/ and target to bin/ folders

  - by about blank

  I'm trying to write a Makefile which will copy its target and objects to bin/ and obj/ directories, respectively. Yet, when I try to run it I get the following error: nasm -f elf64 -g -F stabs main.asm -l spacelander.lst ld -o spacelander obj/main.o ld: cannot find obj/main.o: No such file or directory make: *** [spacelander] Error 1 Why is this happening? Update I noticed when I posted the error that it was due to white spacing errors. After taking care of those, I still get the new error I replaced with the old one I mentioned prior. What is this?? Update 2 Posted -d flag output below Makefile source. Source ASM := nasm ARGS := -f FMT := elf64 OPT := -g -F stabs SRC := main.asm OBJDIR := obj TARGETDIR := bin OBJ := $(addprefix $(OBJDIR)/,$(patsubst %.asm, %.o, $(wildcard *.asm))) TARGET := spacelander .PHONY: all clean all: $(OBJDIR) $(TARGET) $(OBJDIR): mkdir $(OBJDIR) $(OBJDIR)/%.o: $(SRC) $(ASM) $(ARGS) $(FMT) $(OPT) $(SRC) -l $(TARGET).lst $(TARGET): $(OBJ) ld -o $(TARGET) $(OBJ) clean: @rm -f $(TARGET) $(wildcard *.o) @rm -rf $(OBJDIR) make -d Output - NOTE: output is too many characters for body, thus is pastebinned http://pastebin.com/3bctGJxs

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• Trouble accessing Mutable array

  - by Jared Gross

  Im having trouble with my for loop where I am trying to index user names. I am able to separate my original array into individual objects but am not able to send the value to a new array that I need to reference later on. The value and count for userNames in my self.userNamesArray = userNames; line is correct. But right after that when I log self.userNamesArray, I get (null). Any tips cause I'm not completely sure I'm cheers! .h @property (nonatomic, copy) NSMutableArray *userNamesArray; .m - (void)viewWillAppear:(BOOL)animated { self.friendsRelation = [[PFUser currentUser] objectForKey:@"friendsRelation"]; PFQuery *query = [self.friendsRelation query]; [query orderByAscending:@"username"]; [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) { if (error) { NSLog(@"Error: %@ %@", error, [error userInfo]); } else { self.friends = objects; NSArray *users = [self.friends valueForKey:@"username"]; NSLog(@"username:%@", users); //Create an array of name wrappers and pass to the root view controller. NSMutableArray *userNames = [[NSMutableArray alloc] initWithCapacity:[self.friends count]]; for (NSString *user in users) { componentsSeparatedByCharactersInSet:charSet]; NSArray *nameComponents = [user componentsSeparatedByString:@" "]; UserNameWrapper *userNameWrapper = [[UserNameWrapper alloc] initWithUserName:nil nameComponents:nameComponents]; [userNames addObject:userNameWrapper]; } self.userNamesArray = userNames; NSLog(@"userNamesArray:%@",self.userNamesArray); [self.tableView reloadData]; } Here's the code where I need to reference the self.userNamesArray where again, it is comping up nil. - (void)setUserNamesArray:(NSMutableArray *)newDataArray { if (newDataArray != self.userNamesArray) { self.userNamesArray = [newDataArray mutableCopy]; if (self.userNamesArray == nil) { self.sectionsArray = nil; NSLog(@"user names empty"); } else { [self configureSections]; } } }

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• Unable to return/process JSON in JQuery $.get()

  - by shyam

  I have a problem returning/processing JSON data while calling $.get() function. Here's the code: JQuery: $.get("script.php?", function(data) { if (data.status) { alert('ok'); } else { alert(data.error); } },'json'); PHP if ($r) { $ret = array("status"=>true); } else { $ret = array("status"=>false,"error"=>$error); } echo json_encode( $ret ); So this is the code. But the response is always taken as string in the jquery. data.status and data.error is undefined.

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• Why there is no static structs in C#, but static methods within them exists?

  - by sfedorov1982

  // OK struct MyStruct { static void Foo() { } } // Error static struct MyStruct { }

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• Problem Initializing an Array Of Structs

  - by FallSe7en

  I am trying to initialize the following array of the following struct, but my code isn't compiling. Can anybody help me out? The struct/array: struct DiningCarSeat { int status; int order; int waiterNum; Lock customerLock; Condition customer; DiningCarSeat(seatNum) { char* tempLockName; sprintf(tempLockName, "diningCarSeatLock%d", seatNum); char* tempConditionName; sprintf(tempConditionName, "diningCarSeatCondition%d", seatNum); status = 0; order = 0; waiterNum = -1; customerLock = new Lock(tempLockName); customer = new Condition(tempConditionName); } } diningCarSeat[DINING_CAR_CAPACITY]; The relevant errors: ../threads/threadtest.cc: In constructor `DiningCarSeat::DiningCarSeat(int)': ../threads/threadtest.cc:58: error: no matching function for call to `Lock::Lock()' ../threads/synch.h:66: note: candidates are: Lock::Lock(const Lock&) ../threads/synch.h:68: note: Lock::Lock(char*) ../threads/threadtest.cc:58: error: no matching function for call to `Condition::Condition()' ../threads/synch.h:119: note: candidates are: Condition::Condition(const Condition&) ../threads/synch.h:121: note: Condition::Condition(char*) ../threads/threadtest.cc:63: error: expected primary-expression before '.' token ../threads/threadtest.cc:64: error: expected primary-expression before '.' token ../threads/threadtest.cc: At global scope: ../threads/threadtest.cc:69: error: no matching function for call to `DiningCarSeat::DiningCarSeat()' ../threads/threadtest.cc:51: note: candidates are: DiningCarSeat::DiningCarSeat(const DiningCarSeat&) ../threads/threadtest.cc:58: note: DiningCarSeat::DiningCarSeat(int) Thanks in advance!

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• how do you set a handler for appengine_rpc?

  - by python for ever

  i followed what is said in the article. but still i get these errors: first this warning : No handlers could be found for logger "google.appengine.tools.appengine_rpc" then this error: HTTPError: HTTP Error 500: Internal Server Error anyone has an idea about what i am doing wrong? thanks.

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• Why is my socket closing?

  - by Tommy3244

  Ok, so I am making a multiplayer game. I am working out the kinks in the server/client connectivity system. I can't seam to work out this error. Mainly, my server code does the following: Accepts Client Using SocketServer Module CLIENT -- SERVER sends Login byte (1 byte) + login username and password (200 bytes) SERVER request for 1 byte by struct.calcsize('b') CLIENT has exception on read SERVER recieves byte from CLIENT and sends CLIENT a struct packed byte with the value of 4 SERVER has exception on send So, it is the client excepting. The client exception is: socket.error: (10054, 'Connection reset by peer') And the server error is this: error: (9, 'Bad file descriptor')

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• Return from jQuery Ajax Method

  - by Lijo

  I have a button named searchReportButton. On this button click, I need to check session value from server using a ajax web method "Error.aspx/CheckSessionExpiry".This is done in checkSession javascript function. The checkSession is not returning anything now - instead it is handling the required operation based on the result (redirecting to error page). I need to return the result of ajax web method to the Main Caller. How can we do this return? Main Caller searchReportButton.click(function () { checkSession(); //Remainging Code }); Helper function checkSession() { var win = 101; $.ajax( { type: "POST", url: "Error.aspx/CheckSessionExpiry", data: '{"winNumber": "' + win + '"}', contentType: "application/json; charset=utf-8", dataType: "json", success: handleSessionResult } ); } Result Helper function handleSessionResult(result) { if (result.hasOwnProperty("d")) { result = result.d } if (result == "ACTIVE") { window.location.href("Error.aspx"); return false; } //alert(result); }

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• Problem with C++ classes

  - by Mike

  I have a class defined called extBlock. I then make an instance of that class with this extBlock mainBlock = new extBlock(1, 1024); I get this error: error C2440: 'initializing' : cannot convert from 'extBlock *' to 'extBlock' Can anyone help me with why I am getting this error. I have seen examples online of declaring it like this with a pointer extBlock *mainBlock = new extBlock(1, 1024); But if I do it this way it does not let me call the functions of mainBlock

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• What the best way to parse and find The specific data

  - by Khemlall Mangal

  Ok i have an issue i want to resolve. I have the following log file, and i want to parse it and find the errors and then compare them to user expected results and if it doesnt match then error or else pass.... the part that i am having trouble with is finding error within the log.... So in this example, within the log starting point is MASTER EXCLUSIONS:[ALL_EXCLUSIONS] errors: Then error can be in two format as show below. what the regular expressssion orcode that i can use to parse this and get pull out these error from count of 1 to end and i will just be able to take the array value for exammple results[1] - compare if == myresults[1] as an exmple.... outputting it in a file is ok too

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• redefinition c++

  - by coubeatczech

  hi, how does header including in c++ work? I have the classes already implemented in .h file and when there is #include in two files, there's this error: files.h:14:7: error: redefinition of ‘class abstract_file’ files.h:14:20: error: previous definition of ‘class abstract_file’ multiple times for each class and enum. Can anyone explain this?

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• In a JDBC ResultSet, what should happen when getLong() or getShort() is called on an int result colu

  - by Uri

  Say that I have a JDBC ResultSet, and I call the getLong() or getshort() method. For which of the following SQL types {SMALLINT, INT, BIGINT} should I get long, and for which types should I get an error? In other words, if I have an INT and I want a SMALLINT (A short), would I get it, or would I get an error? Similarly, if I have an INT and want a BIGINT (a long), would I get it, or would I get an error? The Javadocs (listed below) say nothing. public long getLong(int columnIndex) throws SQLException Retrieves the value of the designated column in the current row of this ResultSet object as a long in the Java programming language. Parameters: columnIndex - the first column is 1, the second is 2, ... Returns: the column value; if the value is SQL NULL, the value returned is 0 Throws: SQLException - if a database access error occurs

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• How do I reference a control in a different thread?

  - by Testifier

  //button is clicked //worker starts private void processWorker_DoWork(object sender, DoWorkEventArgs e) { string code = DoLongWorkAndReturnCode(); if (code != 0) { MessageBox.Show("Error!"); EnableAllButtons(); // this is defined in the other thread and it's where i run into the error. } else { string code = DoAnotherLongProcessAndReturnCode(); if (code != 0) { MessageBox.Show("Error 2!"); EnableAllButtons(); // again, this is defined in the other thread } } } I'm running into a cross threading error because "EnableAllButtons()" is defined in a different thread. How do I go about enabling all buttons in one thread, from a different thread?

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• Preventing duplicate Data with ASP.NET AJAX

  - by Yousef_Jadallah

    Some times you need to prevent  User names ,E-mail ID's or other values from being duplicated by a new user during Registration or any other cases,So I will add a simple approach to make the page more user-friendly. Instead the user filled all the Registration fields then press submit after that received a message as a result of PostBack that "THIS USERNAME IS EXIST", Ajax tidies this up by allowing asynchronous querying while the user is still completing the registration form.   ASP.NET enables you to create Web services can be accessed from client script in Web pages by using AJAX technology to make Web service calls. Data is exchanged asynchronously between client and server, typically in JSON format. I’ve added an article to show you step by step  how to use ASP.NET AJAX with Web Services , you can find it here .   Lets go a head with the steps :   1-Create a new project , if you are using VS 2005 you have to create ASP.NET Ajax Enabled Web site.   2-Create your own Database which contain user table that have User_Name field. for Testing I’ve added SQL Server Database that come with Dot Net 2008: Then I’ve created tblUsers:   This table and this structure just for our example, you can use your own table to implement this approach.   3-Add new Item to your project or website, Choose Web Service file, lets say  WebService.cs  .In this Web Service file import System.Data.SqlClient Namespace, Then Add your web method that contain string parameter which received the Username parameter from the Script , Finally don’t forget to qualified the Web Service Class with the ScriptServiceAttribute attribute ([System.Web.Script.Services.ScriptService])     using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Services; using System.Data.SqlClient;     [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.Web.Script.Services.ScriptService] public class WebService : System.Web.Services.WebService {     [WebMethod] public int CheckDuplicate(string User_Name) { string strConn = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\TestDB.mdf;Integrated Security=True;User Instance=True"; string strQuery = "SELECT COUNT(*) FROM tblUsers WHERE User_Name = @User_Name"; SqlConnection con = new SqlConnection(strConn); SqlCommand cmd = new SqlCommand(strQuery, con); cmd.Parameters.Add("User_Name", User_Name); con.Open(); int RetVal= (int)cmd.ExecuteScalar(); con.Close(); return RetVal; } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   Our Web Method here is CheckDuplicate Which accept User_Name String as a parameter and return number of the rows , if the name will found in the database this method will return 1 else it will return 0. I’ve applied  [WebMethod] Attribute to our method CheckDuplicate, And applied the ScriptService attribute to a Web Service class named WebService.   4-Add this simple Registration form : <fieldset> <table id="TblRegistratoin" cellpadding="0" cellspacing="0"> <tr> <td> User Name </td> <td> <asp:TextBox ID="txtUserName" onblur="CallWebMethod();" runat="server"></asp:TextBox> </td> <td> <asp:Label ID="lblDuplicate" runat="server" ForeColor="Red" Text=""></asp:Label> </td> </tr> <tr> <td colspan="3"> <asp:Button ID="btnRegistration" runat="server" Text="Registration" /> </td> </tr> </table> </fieldset> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   onblur event is added to the Textbox txtUserName, This event Fires when the Textbox loses the input focus, That mean after the user get focus out from the Textbox CallWebMethod function will be fired. CallWebMethod will be implemented in step 6.   5-Add ScriptManager Control to your aspx file then reference the Web service by adding an asp:ServiceReference child element to the ScriptManager control and setting its path attribute to point to the Web service, That generate a JavaScript proxy class for calling the specified Web service from client script.   <asp:ScriptManager runat="server" ID="scriptManager"> <Services> <asp:ServiceReference Path="WebService.asmx" /> </Services> </asp:ScriptManager> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }     6-Define the JavaScript code to call the Web Service :   <script language="javascript" type="text/javascript">   // This function calls the Web service method // passing simple type parameters and the // callback function function CallWebMethod() { var User_Name = document.getElementById('<%=txtUserName.ClientID %>').value; WebService.CheckDuplicate(User_Name, OnSucceeded, OnError); }   // This is the callback function invoked if the Web service // succeeded function OnSucceeded(result) { var rsltElement = document.getElementById("lblDuplicate"); if (result == 1) rsltElement.innerHTML = "This User Name is exist"; else rsltElement.innerHTML = "";   }   function OnError(error) { // Display the error. alert("Service Error: " + error.get_message()); } </script> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   This call references the WebService Class and CheckDuplicate Web Method defined in the service. It passes a User_Name value obtained from a textbox as well as a callback function named OnSucceeded that should be invoked when the asynchronous Web Service call returns. If the Web Service in different Namespace you can refer it before the class name this Main formula may help you :  NameSpaceName.ClassName.WebMethdName(Parameters , Success callback function, Error callback function); Parameters: you can pass one or many parameters. Success callback function :handles returned data from the service . Error callback function :Any errors that occur when the Web Service is called will trigger in this function. Using Error Callback function is optional.   Hope these steps help you to understand this approach.

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• Preventing duplicate Data with ASP.NET AJAX

  - by Yousef_Jadallah

    Some times you need to prevent  User names ,E-mail ID's or other values from being duplicated by a new user during Registration or any other cases,So I will add a simple approach to make the page more user-friendly. Instead the user filled all the Registration fields then press submit after that received a message as a result of PostBack that "THIS USERNAME IS EXIST", Ajax tidies this up by allowing asynchronous querying while the user is still completing the registration form.   ASP.NET enables you to create Web services can be accessed from client script in Web pages by using AJAX technology to make Web service calls. Data is exchanged asynchronously between client and server, typically in JSON format. I’ve added an article to show you step by step  how to use ASP.NET AJAX with Web Services , you can find it here .   Lets go a head with the steps :   1-Create a new project , if you are using VS 2005 you have to create ASP.NET Ajax Enabled Web site.   2-Create your own Database which contain user table that have User_Name field. for Testing I’ve added SQL Server Database that come with Dot Net 2008: Then I’ve created tblUsers:   This table and this structure just for our example, you can use your own table to implement this approach.   3-Add new Item to your project or website, Choose Web Service file, lets say  WebService.cs  .In this Web Service file import System.Data.SqlClient Namespace, Then Add your web method that contain string parameter which received the Username parameter from the Script , Finally don’t forget to qualified the Web Service Class with the ScriptServiceAttribute attribute ([System.Web.Script.Services.ScriptService])     using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Services; using System.Data.SqlClient;     [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.Web.Script.Services.ScriptService] public class WebService : System.Web.Services.WebService {     [WebMethod] public int CheckDuplicate(string User_Name) { string strConn = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\TestDB.mdf;Integrated Security=True;User Instance=True"; string strQuery = "SELECT COUNT(*) FROM tblUsers WHERE User_Name = @User_Name"; SqlConnection con = new SqlConnection(strConn); SqlCommand cmd = new SqlCommand(strQuery, con); cmd.Parameters.Add("User_Name", User_Name); con.Open(); int RetVal= (int)cmd.ExecuteScalar(); con.Close(); return RetVal; } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   Our Web Method here is CheckDuplicate Which accept User_Name String as a parameter and return number of the rows , if the name will found in the database this method will return 1 else it will return 0. I’ve applied  [WebMethod] Attribute to our method CheckDuplicate, And applied the ScriptService attribute to a Web Service class named WebService.   4-Add this simple Registration form : <fieldset> <table id="TblRegistratoin" cellpadding="0" cellspacing="0"> <tr> <td> User Name </td> <td> <asp:TextBox ID="txtUserName" onblur="CallWebMethod();" runat="server"></asp:TextBox> </td> <td> <asp:Label ID="lblDuplicate" runat="server" ForeColor="Red" Text=""></asp:Label> </td> </tr> <tr> <td colspan="3"> <asp:Button ID="btnRegistration" runat="server" Text="Registration" /> </td> </tr> </table> </fieldset> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   onblur event is added to the Textbox txtUserName, This event Fires when the Textbox loses the input focus, That mean after the user get focus out from the Textbox CallWebMethod function will be fired. CallWebMethod will be implemented in step 6.   5-Add ScriptManager Control to your aspx file then reference the Web service by adding an asp:ServiceReference child element to the ScriptManager control and setting its path attribute to point to the Web service, That generate a JavaScript proxy class for calling the specified Web service from client script.   <asp:ScriptManager runat="server" ID="scriptManager"> <Services> <asp:ServiceReference Path="WebService.asmx" /> </Services> </asp:ScriptManager> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }     6-Define the JavaScript code to call the Web Service :   <script language="javascript" type="text/javascript">   // This function calls the Web service method // passing simple type parameters and the // callback function function CallWebMethod() { var User_Name = document.getElementById('<%=txtUserName.ClientID %>').value; WebService.CheckDuplicate(User_Name, OnSucceeded, OnError); }   // This is the callback function invoked if the Web service // succeeded function OnSucceeded(result) { var rsltElement = document.getElementById("lblDuplicate"); if (result == 1) rsltElement.innerHTML = "This User Name is exist"; else rsltElement.innerHTML = "";   }   function OnError(error) { // Display the error. alert("Service Error: " + error.get_message()); } </script> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   This call references the WebService Class and CheckDuplicate Web Method defined in the service. It passes a User_Name value obtained from a textbox as well as a callback function named OnSucceeded that should be invoked when the asynchronous Web Service call returns. If the Web Service in different Namespace you can refer it before the class name this Main formula may help you :  NameSpaceName.ClassName.WebMethdName(Parameters , Success callback function, Error callback function); Parameters: you can pass one or many parameters. Success callback function :handles returned data from the service . Error callback function :Any errors that occur when the Web Service is called will trigger in this function. Using Error Callback function is optional.   Hope these steps help you to understand this approach.

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• Using a WPF ListView as a DataGrid

  - by psheriff

  Many people like to view data in a grid format of rows and columns. WPF did not come with a data grid control that automatically creates rows and columns for you based on the object you pass it. However, the WPF Toolkit can be downloaded from CodePlex.com that does contain a DataGrid control. This DataGrid gives you the ability to pass it a DataTable or a Collection class and it will automatically figure out the columns or properties and create all the columns for you and display the data.The DataGrid control also supports editing and many other features that you might not always need. This means that the DataGrid does take a little more time to render the data. If you want to just display data (see Figure 1) in a grid format, then a ListView works quite well for this task. Of course, you will need to create the columns for the ListView, but with just a little generic code, you can create the columns on the fly just like the WPF Toolkit’s DataGrid. Figure 1: A List of Data using a ListView A Simple ListView ControlThe XAML below is what you would use to create the ListView shown in Figure 1. However, the problem with using XAML is you have to pre-define the columns. You cannot re-use this ListView except for “Product” data. <ListView x:Name="lstData"          ItemsSource="{Binding}">  <ListView.View>    <GridView>      <GridViewColumn Header="Product ID"                      Width="Auto"               DisplayMemberBinding="{Binding Path=ProductId}" />      <GridViewColumn Header="Product Name"                      Width="Auto"               DisplayMemberBinding="{Binding Path=ProductName}" />      <GridViewColumn Header="Price"                      Width="Auto"               DisplayMemberBinding="{Binding Path=Price}" />    </GridView>  </ListView.View></ListView> So, instead of creating the GridViewColumn’s in XAML, let’s learn to create them in code to create any amount of columns in a ListView. Create GridViewColumn’s From Data TableTo display multiple columns in a ListView control you need to set its View property to a GridView collection object. You add GridViewColumn objects to the GridView collection and assign the GridView to the View property. Each GridViewColumn object needs to be bound to a column or property name of the object that the ListView will be bound to. An ADO.NET DataTable object contains a collection of columns, and these columns have a ColumnName property which you use to bind to the GridViewColumn objects. Listing 1 shows a sample of reading and XML file into a DataSet object. After reading the data a GridView object is created. You can then loop through the DataTable columns collection and create a GridViewColumn object for each column in the DataTable. Notice the DisplayMemberBinding property is set to a new Binding to the ColumnName in the DataTable. C#private void FirstSample(){  // Read the data  DataSet ds = new DataSet();  ds.ReadXml(GetCurrentDirectory() + @"\Xml\Product.xml");    // Create the GridView  GridView gv = new GridView();   // Create the GridView Columns  foreach (DataColumn item in ds.Tables[0].Columns)  {    GridViewColumn gvc = new GridViewColumn();    gvc.DisplayMemberBinding = new Binding(item.ColumnName);    gvc.Header = item.ColumnName;    gvc.Width = Double.NaN;    gv.Columns.Add(gvc);  }   // Setup the GridView Columns  lstData.View = gv;  // Display the Data  lstData.DataContext = ds.Tables[0];} VB.NETPrivate Sub FirstSample()  ' Read the data  Dim ds As New DataSet()  ds.ReadXml(GetCurrentDirectory() & "\Xml\Product.xml")   ' Create the GridView  Dim gv As New GridView()   ' Create the GridView Columns  For Each item As DataColumn In ds.Tables(0).Columns    Dim gvc As New GridViewColumn()    gvc.DisplayMemberBinding = New Binding(item.ColumnName)    gvc.Header = item.ColumnName    gvc.Width = [Double].NaN    gv.Columns.Add(gvc)  Next   ' Setup the GridView Columns  lstData.View = gv  ' Display the Data  lstData.DataContext = ds.Tables(0)End SubListing 1: Loop through the DataTable columns collection to create GridViewColumn objects A Generic Method for Creating a GridViewInstead of having to write the code shown in Listing 1 for each ListView you wish to create, you can create a generic method that given any DataTable will return a GridView column collection. Listing 2 shows how you can simplify the code in Listing 1 by setting up a class called WPFListViewCommon and create a method called CreateGridViewColumns that returns your GridView. C#private void DataTableSample(){  // Read the data  DataSet ds = new DataSet();  ds.ReadXml(GetCurrentDirectory() + @"\Xml\Product.xml");   // Setup the GridView Columns  lstData.View =      WPFListViewCommon.CreateGridViewColumns(ds.Tables[0]);  lstData.DataContext = ds.Tables[0];} VB.NETPrivate Sub DataTableSample()  ' Read the data  Dim ds As New DataSet()  ds.ReadXml(GetCurrentDirectory() & "\Xml\Product.xml")   ' Setup the GridView Columns  lstData.View = _      WPFListViewCommon.CreateGridViewColumns(ds.Tables(0))  lstData.DataContext = ds.Tables(0)End SubListing 2: Call a generic method to create GridViewColumns. The CreateGridViewColumns MethodThe CreateGridViewColumns method will take a DataTable as a parameter and create a GridView object with a GridViewColumn object in its collection for each column in your DataTable. C#public static GridView CreateGridViewColumns(DataTable dt){  // Create the GridView  GridView gv = new GridView();  gv.AllowsColumnReorder = true;   // Create the GridView Columns  foreach (DataColumn item in dt.Columns)  {    GridViewColumn gvc = new GridViewColumn();    gvc.DisplayMemberBinding = new Binding(item.ColumnName);    gvc.Header = item.ColumnName;    gvc.Width = Double.NaN;    gv.Columns.Add(gvc);  }   return gv;} VB.NETPublic Shared Function CreateGridViewColumns _  (ByVal dt As DataTable) As GridView  ' Create the GridView  Dim gv As New GridView()  gv.AllowsColumnReorder = True   ' Create the GridView Columns  For Each item As DataColumn In dt.Columns    Dim gvc As New GridViewColumn()    gvc.DisplayMemberBinding = New Binding(item.ColumnName)    gvc.Header = item.ColumnName    gvc.Width = [Double].NaN    gv.Columns.Add(gvc)  Next   Return gvEnd FunctionListing 3: The CreateGridViewColumns method takes a DataTable and creates GridViewColumn objects in a GridView. By separating this method out into a class you can call this method anytime you want to create a ListView with a collection of columns from a DataTable. SummaryIn this blog you learned how to create a ListView that acts like a DataGrid. You are able to use a DataTable as both the source of the data, and for creating the columns for the ListView. In the next blog entry you will learn how to use the same technique, but for Collection classes. NOTE: You can download the complete sample code (in both VB and C#) at my website. http://www.pdsa.com/downloads. Choose Tips & Tricks, then "WPF ListView as a DataGrid" from the drop-down. Good Luck with your Coding,Paul Sheriff ** SPECIAL OFFER FOR MY BLOG READERS **Visit http://www.pdsa.com/Event/Blog for a free eBook on "Fundamentals of N-Tier".

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• CodePlex Daily Summary for Friday, March 05, 2010

  CodePlex Daily Summary for Friday, March 05, 2010New Projects.svn Folders Cleanup Tool: dotSVN Cleanup is a tool that allows you to remove the .svn folders . Just click, browse, say abracadabra ...and the magic is done. Have fun with...Accord: The Accord framework creates an easy we to integrate any Dependency Injection framework into your project, while abstracting the details of your im...Asp.net MVC Lab: Try asp.net mvc outASP.NET Themes management with Webforms: The provided source is an example for how to use themes in ASP.NET Webforms. this source is the "up to date" support for the article I wroteB&W Port Scanner: B&W Port Scanner (formerly Net Inspector) is a fast TCP Port scan utility. The main idea is support of customizable operations to be performed f...BizTalk SWAT - Simple Web Activity Tracker: This is a web based version of BizTalk HAT. The concept is designed to be able to share and enable sharing of orchestration info easily. Some of th...C# Linear Hash Table: A C# dictionary-like implementation of a linear hash table. It is more memory efficiant than the .NET dictionary, and also almost as fast. NOTE: On...DBF Import Export Wizard: DBF Import Export Wizard is a tool for anyone needing to import DBF files into SQL Server or to export SQL Server tables to a DBF file. This proje...Domain as XML - Driven Development: Visual Studio Code Samples: Domain as XML - Driven Development: Visual Studio Code SamplesEasyDownload: This application allows to manage downloads handling an stack of files and several useful configurationsEos2: .FlightTickets: This application allows to buy flight ticketsFotofly PhotoViewer: A Silverlight control that uses the Fotofly metadata library to show the people in a photo (using Windows Live Photo Gallery People metadata) and a...Fujiy source code: Source code examplesGameSet: This application allows to play games with distributed users.Injectivity (Dependency Injection): Injectivity is a dependency injection framework (written in C#) with a strong focus on the ease of configuration and performance. Having been writt...Inventory: Keep track of inputs, materias and salesLoanTin.Com Source Code: LoanTin.Com - a Social Networking Website as same as Tumblr.com, based on source code of Loantiner Project, allow anyone can share anything to anyo...mysln: my solutions.NumTextBox: TextBox控件重写 之NumTextBox，主要实现的功能是，只允许输入数字，或String,Numeric,Currency,Decimal,Float,Double,Short,Int,Long 修改自：http://www.codeproject.com/KB/edit/num...Quick Performance Monitor: This small utility helps to monitor performance counters without using the full blown perfmon tool from Windows. It supports a number of command li...Runo: Runo ResearchSales: This application allows to manage a hardware storeScrewWiki Form Auth Provider: Enables your ASP.NET site to use Forms Authentication to integrate with your ScrewWiki. User management is performed on a parent site, and cookie i...SDS: Scientific DataSet library and tools: The SDS library makes it easy for .Net developers to read, write and share scalars, vectors, matrices and multidimensional grids which are very com...ShapeSweeper: Minesweeper-like game for the Zune HD. Each hidden object has three properties to discover--location, color, and shape--and all three must be corre...SilverlightExcel: an Excel file viewer in Silverlight 4: SilverlightExcel is a Silverlight application allowing you to open and view Excel files and also create graphs.sPWadmin: pwAdmin is an Web Interface based on JSP that uses the PW-Java API to control an PW-Server.Video Player control in Silverlight: A control for playing video in Silverlight 4 with chapters on timeline control. This player will be easily skinnable and customizable. More Featur...XNA Light Pre Pass Renderer: A demo/sample that shows how to write a light pre pass renderer in XNA.Zimms: Collaboration Site for friends, a code depot, and scratch padNew Releases.svn Folders Cleanup Tool: dotSVN Cleanup Tool: dotSVN Cleanup Tool executableAccord: Alpha: Initial build of the Accord framework.AcPrac: AcPrac Ver 0.1: The first version of AcPrac. It is not fully functional, but rather a version to get the bugs out. Please report all bugs.ASP.NET: ASP.NET Browser Definition Files: This download contains: ASP.NET 4 Browser Definition Files -- You can use the new ASP.NET 4 browser definition files with earlier versions of ASP....B&W Port Scanner: Black`n`White Port Scanner 1.0: B&W Port Scanner 1.0 Final Release Date: 03.03.2010 Black`n`WhiteBizTalk SWAT - Simple Web Activity Tracker: BizTalk SWAT: This is a web based version of BizTalk HAT. The concept is designed to be able to share and enable sharing of orchestration info easily. It uses th...BTP Tools: CSB+CUV+HCSB dict files 2010-03-04: 5. is now missing a space between the Strong’s number and the Count: >CSB Translation: 圣所 7, 至圣所G39+G394 it should be: CSB Translation: 圣所 7, 至圣所G...C# Linear Hash Table: Linear Hash Table: First working version of the Linear Hash Table.Cassiopeia: WinTools 1.0 beta: First ReleaseComposure: Caliburn-44007-trunk-vs2010.net40: This is a very simple conversion of the Caliburn trunk (rev 44007) for use in Visual Studio 2010 RC1 built against .NET40. Because the conversion w...Cover Creator: CoverCreator 1.3.0: English and Polish version. Functionality to add image to the front page. Load / save covers.DBF Import Export Wizard: DBF Import Export Wizard Source Code: Version 0.1.0.3DBF Import Export Wizard: DBF_Import_Export_Wizard Setup 0.1.0.3: Zip file contains Setup.exeESB Toolkit Extensions: Tellago BizTalk ESB 2.0 Toolkit Extensions v0.2: Windows Installer file that installs Library on a BizTalk ESB 2.0 system. This Install automatically configures the esb.config to use the new compo...Fotofly PhotoViewer: Fotofly Photoview v0.1: The first public release. Based on a Silverlight application I have been using for over a year at www.tassography.com. This version uses Fotofly v0...HPC with GPUs applied to CG: Cuda Soft Bodies simulation: Cuda src for soft bodiesHPC with GPUs applied to CG: Full Soft Bodies src: full src code for soft bodies simulationInjectivity (Dependency Injection): 2.8.166.2135: Release 2.8.166.2135 of the Injectivity dependency injection framework.Line Counter: 1.5 (Code Outline Preview): This version contains preview of the code outline feature, you can now view C# code outline within Line Counter. Note that the code outline now onl...Micajah Mindtouch Deki Wiki Copier: MicajahWikiCopier: You should use the following line arguments: WikiCopier.exe "http://oldwikiwithdata.wik.is/@api/deki" "login" "password" "http://newwiki.somename.l...ncontrols: Alpha 0.4.0.1: Added some example on the Console Project.NumTextBox: NumTextBox初始版本: TextBox控件重写 之NumTextBox，主要实现的功能是，只允许输入数字，或String,Numeric,Currency,Decimal,Float,Double,Short,Int,Long 此为初始版本PSCodeplex: PS CodePlex 0.2: PS CodePlex 0.2 has some breaking changes to the parameters. A few of the parameters are renamed and a few are made as switch parameters. Add-Rele...Quick Performance Monitor: QPerfMon First release - Version 1.0.0: The first release of the utility.RapidWebDev - .NET Enterprise Software Development Infrastructure: ProductManagement Quick Sample 0.2: This is a sample product management application to demonstrate how to develop enterprise software in RapidWebDev. The glossary of the system are ro...ScrewWiki Form Auth Provider: ScrewWiki Forms Authentication: Initial ReleaseSee.Sharper: See.Sharper.Docs-1.10.3.4: HTML documentation (including Doxygen project)See.Sharper: See.Sharper-1.10.3.4: Solution (Source files, debug and release binaries)Solar.Generic: Solar.Generic 0.8.0.0 Beta (Revised, Renamed): Solar.Generic 0.8.0.0 (Revised & Renamed) Renamed project from Solar.Commons to Solar.Generic. Project solution file is now in format of Visual ...Solar.Security: Solar.Security 1.1.0.0: Performed several major refactorings of code base. Stripped In-Memory implementation of IConfiguration interface of transactional behavior due to...sPWadmin: pwAdmin v0.7: -Star System Simulator: Star System Simulator 2.3: Changes in this release: Fixed several localisation issues. Features in this release: Model star systems in 3D. Euler-Cromer method. Improved...SysI: sysi, stable and ready: This time for sure.TheWhiteAmbit: TheWhiteAmbit - Demo: Two little demos demonstrating: - fast realtime raytracing - generating bent normals for shading (CUDA capable GPU needed = nVidia GeForce >8x00)VsTortoise - a TortoiseSVN add-in for Microsoft Visual Studio: VsTortoise Build 22 Beta: Build 22 (beta) New: Visual Studio 2010 RC support (VsTortoise for Visual Studio 2010 RC screenshots) New: VsTortoise integrates in to Solution E...WinMergeFS: WinMergeFS 0.1.42128alpha: WinMergeFS provides AuFS functionality for windows. With WinMergeFS users can mount multiple directories into a virtual drive. Plugin based root se...WSDLGenerator: WSDLGenerator 0.0.0.2: - Bugs fixed - Code refactored - Added support for custom typesXNA Light Pre Pass Renderer: LightPrePassRendererXNA: Zipped source code for the light pre pass renderer made with XNA.Most Popular ProjectsMetaSharpRawrWBFS ManagerAJAX Control ToolkitMicrosoft SQL Server Product Samples: DatabaseSilverlight ToolkitWindows Presentation Foundation (WPF)LiveUpload to FacebookASP.NETMicrosoft SQL Server Community & SamplesMost Active ProjectsUmbraco CMSRawrBlogEngine.NETSDS: Scientific DataSet library and toolsMapWindow GISpatterns & practices – Enterprise LibraryjQuery Library for SharePoint Web ServicesIonics Isapi Rewrite FilterMDT Web FrontEndDiffPlex - a .NET Diff Generator

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• Resolve a URL from a Partial View (ASP.NET MVC)

  Working on an ASP.NET MVC application and needed the ability to resolve a URL from a partial view. For example, I have an image I want to display, but I need to resolve the virtual path (say, ~/Content/Images/New.png) into a relative path that the browser can use, such as ../../Content/Images/New.png or /MyAppName/Content/Images/New.png. Astandard view derives from the System.Web.UI.Page class, meaning you have access to the ResolveUrl and ResolveClientUrl methods. Consequently, you can write markup/code like the following:' /The problem is that the above code does not work as expected in a partial view. What's a little confusing is that while the above code compiles and the page, when visited through a browser, renders, the call to Page.ResolveClientUrl returns precisely what you pass in, ~/Content/Images/New.png, in this instance. The browser doesn't know what to do with ~, it presumes it's part of the URL, so it sends the request to the server for the image with the ~ in the URL, which results in a broken image.I did a bit of searching online and found this handy tip from Stephen Walther - Using ResolveUrl in an HTML Helper. In a nutshell, Stephen shows how to create an extension method for the HtmlHelper class that uses the UrlHelper class to resolve a URL. Specifically, Stephen shows how to add an Image extension method to HtmlHelper. I incorporated Stephen's code into my codebase and also created a more generic extension method, which I named ResolveUrl.public static MvcHtmlString ResolveUrl(this HtmlHelper htmlHelper, string url) { var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext); return MvcHtmlString.Create(urlHelper.Content(url)); }With this method in place you can resolve a URL in a partial view like so:' /Or you could use Stephen's Html.Image extension method (althoughmy more generic Html.ResolveUrl method could be used in non-image related scenarios where you needed to get a relative URL from a virtual one in a partial view). Thanks for the helpful tip, Stephen!Happy Programming!Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Resolve a URL from a Partial View (ASP.NET MVC)

  Working on an ASP.NET MVC application and needed the ability to resolve a URL from a partial view. For example, I have an image I want to display, but I need to resolve the virtual path (say, ~/Content/Images/New.png) into a relative path that the browser can use, such as ../../Content/Images/New.png or /MyAppName/Content/Images/New.png. Astandard view derives from the System.Web.UI.Page class, meaning you have access to the ResolveUrl and ResolveClientUrl methods. Consequently, you can write markup/code like the following:' /The problem is that the above code does not work as expected in a partial view. What's a little confusing is that while the above code compiles and the page, when visited through a browser, renders, the call to Page.ResolveClientUrl returns precisely what you pass in, ~/Content/Images/New.png, in this instance. The browser doesn't know what to do with ~, it presumes it's part of the URL, so it sends the request to the server for the image with the ~ in the URL, which results in a broken image.I did a bit of searching online and found this handy tip from Stephen Walther - Using ResolveUrl in an HTML Helper. In a nutshell, Stephen shows how to create an extension method for the HtmlHelper class that uses the UrlHelper class to resolve a URL. Specifically, Stephen shows how to add an Image extension method to HtmlHelper. I incorporated Stephen's code into my codebase and also created a more generic extension method, which I named ResolveUrl.public static MvcHtmlString ResolveUrl(this HtmlHelper htmlHelper, string url) { var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext); return MvcHtmlString.Create(urlHelper.Content(url)); }With this method in place you can resolve a URL in a partial view like so:' /Or you could use Stephen's Html.Image extension method (althoughmy more generic Html.ResolveUrl method could be used in non-image related scenarios where you needed to get a relative URL from a virtual one in a partial view). Thanks for the helpful tip, Stephen!Happy Programming!Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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