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• JLabel withing another JLabel

  - by out_sider

  I want to do a very simple thing with java swing and I'm not being able to. I added a jLabel as it is the only object using java swing that can hold an image (using the icon property)...at least I wasn't able to set an image using other objects. Now I want to add another jlabel in top of the first one with another image so it can be "clicked" independently from the "background" label. But whenever I try to add it using the graphical editor or by doing jLabel1.add(jLabel2) it doesn't work...it simply sets next to the label1 but not on top of it. This is in order to do a java application like the Tic Tac Toe game...so I can have the background which are squares (first label) and the others the "X" and "O". board This might be the board and I want to put labels on each square so they can be the pieces.

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• LINQ: How to Use RemoveAll without using For loop with Array

  - by CrimsonX

  I currently have a log object I'd like to remove objects from, based on a LINQ query. I would like to remove all records in the log if the sum of the versions within a program are greater than 60. Currently I'm pretty confident that this'll work, but it seems kludgy: for (int index = 0; index < 4; index++) { Log.RemoveAll(log => (log.Program[index].Version[0].Value + log.Program[index].Version[1].Value + log.Program[index].Version[2].Value ) > 60); } The Program is an array of 4 values and version has an array of 3 values. Is there a more simple way to do this RemoveAll in LINQ without using the for loop? Thanks for any help in advance!

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• Core Data inserting objects

  - by Joe

  I'm trying to get my head around Core Data on the iphone. This is code from Apple's 'Navigation based app using Core data' template (method - insertNewObject) // Create a new instance of the entity managed by the fetched results controller. NSManagedObjectContext *context = [fetchedResultsController managedObjectContext]; NSEntityDescription *entity = [[fetchedResultsController fetchRequest] entity]; NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:context]; It seems completely counter intuitive to me that the fetched results controller is used when inserting a new object. I changed the code to this: NSEntityDescription *entity = [NSEntityDescription entityForName:@"Event" inManagedObjectContext:managedObjectContext]; NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:managedObjectContext]; which works just as well and does not require access to the fetch request. Am I missing something here? Is there any good reason to use the fetched results controller in the insert method?

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• Android serialization: ImageView

  - by embo

  I have a simple class: public class Ball2 extends ImageView implements Serializable { public Ball2(Context context) { super(context); } } Serialization ok: private void saveState() throws IOException { ObjectOutputStream oos = new ObjectOutputStream(openFileOutput("data", MODE_PRIVATE)); try { Ball2 data = new Ball2(Game2.this); oos.writeObject(data); oos.flush(); } catch (Exception e) { Log.e("write error", e.getMessage(), e); } finally { oos.close(); } } But deserealization private void loadState() throws IOException { ObjectInputStream ois = new ObjectInputStream(openFileInput("data")); try { Ball2 data = (Ball2) ois.readObject(); } catch (Exception e) { Log.e("read error", e.getMessage(), e); } finally { ois.close(); } } fail with error: 03-24 21:52:43.305: ERROR/read error(1948): java.io.InvalidClassException: android.widget.ImageView; IllegalAccessException How deserialize object correctly?

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• Default Accessor Needed: Custom ConfigurationSection

  - by Mark

  I am totally confused by a simple Microsoft error message. When I run XSD.exe against an assembly that contains a custom ConfigurationSection (which in turn utilizes a custom ConfigurationElement and a custom ConfigurationElementCollection, as well as several ConfigurationProperties), I get the following error message: Error: There was an error processing 'Olbert.Entity.Utils.dll'. There was an error reflecting type 'Olbert.Entity.DatabaseConnection'. You must implement a default accessor on System.Configuration.ConfigurationLockCollection because it inherits from ICollection. Yet the class in question has a default accessor: public object this[int idx] { get { return null; } set { } } I realize the above doesn't do anything, but I don't need to access the element's properties by index. I'm just trying to work around the error message. So what's going on?

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• how to get obj2.name via obj1.categories(), thanks (gae python)

  - by zjm1126

  i using google-app-engine webapp ,code is : class Post(db.Model): title = db.StringProperty(required=True) def categories(self): return (x.category for x in self.postcategory_set) class Category(db.Model): name = db.StringProperty() class PostCategory(db.Model): post = db.ReferenceProperty(Post) category = db.ReferenceProperty(Category) class sss(webapp.RequestHandler): def get(self): obj1 = Post(title='hhaa') #obj1.title = 'haha' obj1.put() obj2 = Category() obj2.name='haha-kao' obj2.put() obj3=PostCategory() obj3.post=obj1 obj3.category=obj2 obj3.put() self.response.out.write(obj1.categories().get().name) the error is : Traceback (most recent call last): File "D:\Program Files\Google\google_appengine\google\appengine\ext\webapp\__init__.py", line 511, in __call__ handler.get(*groups) File "D:\zjm_code\helloworld\a.py", line 131, in get self.response.out.write(obj1.categories().get().name) AttributeError: 'generator' object has no attribute 'get' so how to get the obj2.name via obj1's method thanks

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• Tapastry error about not having a tml only for some requests

  - by dinesh707

  Object onActivate(final String jsonRequest){ return new StreamResponse() { private InputStream inputStream; public void prepareResponse(Response response) { I'm using the above code to generate a XML as the response. When I test it in browser, it works fine. But when I send my request from Android application i get the following error on server side. [ERROR] TapestryModule.RequestExceptionHandler Processing of request failed with uncaught exception: Page catalog/Index did not generate any markup when rendered. This could be because its template file could not be located, or because a render phase method in the page prevented rendering. java.lang.RuntimeException: Page catalog/Index did not generate any markup when rendered. This could be because its template file could not be located, or because a render phase method in the page prevented rendering.

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• Fancy box and youtube video problems

  - by shinjuo

  I have some fancy box photos and a youtube video, but when the fancy box picture opens the youtube video sits in front of it? Any ideas? Here is a snippet of my code: <!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> <script type="text/javascript"> <!-- var newwindow; function newWindow(url) { newwindow=window.open(url,'name','height=600,width=625'); if (window.focus) {newwindow.focus()} } // --> </script> <meta content="text/html; charset=utf-8" http-equiv="Content-Type" /> <title>onco Construction and Supply - Rhino Shield</title> <script type="text/javascript" src="http://code.jquery.com/jquery-1.4.2.min.js"></script> <script type="text/javascript" src="fancybox/jquery.mousewheel-3.0.2.pack.js"></script> <script type="text/javascript" src="fancybox/jquery.fancybox-1.3.1.js"></script> <link rel="stylesheet" type="text/css" href="fancybox/jquery.fancybox-1.3.1.css" media="screen" /> <link rel="stylesheet" type="text/css" href="../style3.css" media="screen" /> <script type="text/javascript"> $(document).ready(function() { $("a[rel=example_group]").fancybox({ 'transitionIn' : 'elastic', 'transitionOut' : 'elastic', 'titlePosition' : 'over', 'titleFormat' : function(title, currentArray, currentIndex, currentOpts) { return '<span id="fancybox-title-over">Image ' + (currentIndex + 1) + ' / ' + currentArray.length + (title.length ? ' &nbsp; ' + title : '') + '</span>'; } }); }); </script> <style type="text/css"> .commercial { position: absolute; left:205px; top:1175px; width:327px; height:auto; } .pictures { position: absolute; left: 50px; top: 1090px; width: 750px; height: auto; text-align: center; } </style> </head> <body> <div class="pictures"> <a rel="example_group" href="images/rhino/1.jpg"> <img src="images/rhino/small/1.jpg" alt=""/></a> <a rel="example_group" href="images/rhino/2.jpg"> <img src="images/rhino/small/2.jpg" alt=""/></a> <a rel="example_group" href="images/rhino/3.jpg"> <img src="images/rhino/small/3.jpg" alt=""/></a> <a rel="example_group" href="images/rhino/4.jpg"> <img src="images/rhino/small/4.jpg" alt=""/></a> <a rel="example_group" href="images/rhino/5.jpg"> <img src="images/rhino/small/5.jpg" alt=""/></a> <a rel="example_group" href="images/rhino/6.jpg"> <img src="images/rhino/small/6.jpg" alt=""/></a> </div> <div class="commercial"> <object width="445" height="364"><param name="movie" value="http://www.youtube.com/v/Mw3gLivJkg0&hl=en_US&fs=1&rel=0&color1=0x2b405b&color2=0x6b8ab6&border=1"></param> <param name="allowFullScreen" value="true"></param> <param name="allowscriptaccess" value="always"></param> <embed src="http://www.youtube.com/v/Mw3gLivJkg0&hl=en_US&fs=1&rel=0&color1=0x2b405b&color2=0x6b8ab6&border=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="445" height="364"> </embed> </object> </div> </body> </html>

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• Accessing constructor from abstract base class with reflection

  - by craesh

  Hi! I'm playing around with Java's Reflection. I have an abstract class Base with a constructor. abstract class Base { public Base( String foo ) { // do some magic } } I have some further classes extending Base. They don't contain much logic. I want to instantiate them with Base's constructor, without having to write some proxy contructors in those derived classes. And of course, I want to instantiate those derived classes with Reflection. Say: Class cls = SomeDerivedClass.class; Constructor constr; constr = cls.getConstructor( new Class[] { String.class } ); // will return null Class clsBase = Base.class; constr = clsBase.getConstructor( new Class[] { String.class } ); // ok Base obj = (Base) constr.newInstance( new Object[] { "foo" } ); // will throw InstantiationException because it belongs to an abstract class Any ideas, how I can instantiate a derived class with Base's constructor? Or must I declare those dumb proxy constructors?

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• MySql UDF using shared library won't load

  - by Jarrod

  I am attempting to create a mysql UDF which will match a fingerprint using Digital Persona's free linux SDK library. I have written a trivial UDF as a learning experience which worked fine. However, when I added a dependency to Digital Persona's shared object I can no longer get MySql to load my UDF. I added includes to DP's headers and compiled my UDF using: gcc -fPIC -Wall -I/usr/src/mysql-5.0.45-linux-i686-icc-glibc23/include -shared -o dp_udf.so dp_udf.cc I also tried adding the -static argument, but whenever I restart MySql, I get the error: Can't open shared library 'dp_udf.so' (errno: 0 /usr/local/mysql/lib/plugin/dp_udf.so: undefined symbol: MC_verifyFeaturesEx) MC_verifyFeaturesEx is a function defined "dpMatch.h" which I included, and is implemented in libdpfpapi.so which I have tried placing in the same location as my dp_udf.so and in /usr/lib. Am I doing something wrong with my call to gcc (my C++ skills are rusty) or does MySql not allow UDFs to use additional shared objects?

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• Inheritance: when implementing an interface which define a base class property why cant the class im

  - by Deepak

  Lets create some interfaces public interface ITimeEventHandler { string Open(); } public interface IJobTimeEventHandler: ITimeEventHandler { string DeleteJob(); } public interface IActivityTimeEventHandler: ITimeEventHandler { string DeleteActivity(); } public interface ITimeEvent { ITimeEventHandler Handler; } Another Interface public interface IJobTimeEvent :ITimeEvent { int JobID; } Create a class public class JobTimeEvent : IJobTimeEvent { public int JobID = 0; public IJobTimeEventHandler Handler = null; } My question is .. when implementing an interface which define a base class property why cant the class implementing interface return a derived class type object ?? For ex in class JobTimeEvent, IJobtimeEvent needs a property of type ITimeEventHandler but why IJobTimeEventHandler type is not allowed which derived from ITimeEventHandler

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• Google Maps integration with JSON - CircularReferenceError

  - by JZ

  I'm working on Rails 3.0.0.beta2, following Advanced Rails Recipes "Recipe #32, Mark locations on a Google Map" and I hit a road block. The following code is returning a "ActiveSupport::JSON::Encoding::CircularReferenceError" "object references itself" at line 3. This code represents the /layouts/maps.html.erb file <% if @maps -%> <script type="text/javascript"> var maps = <%= @maps.to_json %>; </script> <% end -%> This is my first attempt at rendering JSON, and I don't know how to debug this problem. Do you have experience with this? What could cause this problem? Thank you in advance!

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• SqlCommand.Paramaters.AddWithValue issue

  - by Petrus

  Hi I have a problem with the folowwing piece of code. I am passing a parameter (List) to a methods executing the following code. When it executes sql throws an error saying that the proc expects a parameter that was not provided. I know this error and understand it, and when stepping through the code I can see that the cmdExecuteReader object has a collection of parameters, with the correct naame and value. What cou be the problem? public SqlDataReader ExecuteReader(string storedProcedure, List<SqlParameter> parameters = null) { SqlCommand cmdExecuteReader = new SqlCommand() { CommandType = System.Data.CommandType.Text, Connection = conn, CommandText = storedProcedure }; if (parameters != null) { foreach (SqlParameter param in parameters) { cmdExecuteReader.Parameters.AddWithValue(param.ParameterName, param.Value); } } if (conn.State == System.Data.ConnectionState.Closed) conn.Open(); return cmdExecuteReader.ExecuteReader(); }

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• Embedding an existing exe file into another C++ program

  - by Milad

  Is there a way to link an existing .exe file with other C++ source files during compilation? What I'm actually trying to do is to compress and decompress some files in my console program using LZMA(7zip) SDK but unfortunately it's very difficult to use for a newbie. There is a command line version of LZMA called 7za.exe and I am wondering if I can somehow embed it into my program and use it like a function. It can be easily used with system() function (which seems to be a very dangerous thing to use) but then if I send my program to someone who doesn't have 7za.exe in the right folder it won't work. I came across CreateProcess() function in windows.h header files but it seems to achieve what system() does in a more proper and advanced way. I don't know if it can actually link the exe file like an object file during compilation

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• How do I get the value of a DynamicControl?

  - by Telos

  I'm using ASP.NET Dynamic Data functionality to do something a little weird. Namely, create a dynamic list of fields as children of the main object. So basically I have Ticket.Fields. The main page lists all the fields for Ticket, and the Fields property has a DynamicControl that generates a list of controls to collect more data. The tricky part is that this list ALSO uses Dynamic Data to generate the controls, so each field can be any of the defined FieldTemplates... meaning I don't necessarily know what the actual data control will be when I try to get the value. So, how do I get the value of a DynamicControl? Do I need to create a new subclass of FieldTemplate that provides a means to get at the value?

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• How to free virtual memory ?

  - by Mehdi Amrollahi

  I have a crawler application (with C#) that downloads pages from web . The application take more virtual memory , even i dispose every object and even use GC.Collect() . This , have 10 thread and each thread has a socket that downloads pages . I use dispose method and even use GC.Collect() in my application , but in 3 hour my application take 500 MB on virtual memory (500 MB on private bytes in Process explorer) . Then my system will be hang and i should restart my pc . Is there any way that i use to free vitual memory ? Thanks .

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• Defining a dd/mm/yyyy field within an abstract table model

  - by Simon Andi

  I have defined an abstract table model but one of the columns should house date values as dd/mm/yyyy format not sure how to do this. I have a external global file and have hard coded the dates as dd/mm/yyyy. How can I define this column within my abstract table model so that to only allow only dates having dd/mm/yyyy format. public class OptraderGlobalParameters { public static boolean DEBUG = true; //Set DEBUG = true for Debugging /*=========================*/ /*Table Array For Dividends*/ /*=========================*/ public static String[] columnNames = {"Date", "Dividend", "Actual", "Yield (%)" }; public static Object[][] data = { {"dd/mm/yyyy", new Double(5), new Boolean(false), new Boolean(false)}, {"dd/mm/yyyy", new Double(5), new Boolean(false), new Boolean(false)}, {"dd/mm/yyyy", new Double(5), new Boolean(false), new Boolean(false)}, {"dd/mm/yyyy", new Double(5), new Boolean(false), new Boolean(false)}, {"dd/mm/yyyy", new Double(5), new Boolean(false), new Boolean(false)}, }; }

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• Binding dropdown list in a gridview edit item template

  - by Renju

  i can bind the dropdownlist in the edit item template. The drop down list is having null values. protected void grdDevelopment_RowDataBound(object sender, GridViewRowEventArgs e) { DropDownList drpBuildServers = new DropDownList(); if (grdDevelopment.EditIndex == e.Row.RowIndex) { drpBuildServers = (DropDownList)e.Row.Cells[0].FindControl("ddlBuildServers"); } } also getting an error Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

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• Estimate serialization size of objects?

  - by Stefan K.

  In my thesis, I woud like to enhance messaging in a cluster. It's important to log runtime information about how big a message is (should I prefer processing local or remote). I could just find frameoworks about estimating the object memory size based on java instrumentation. I've tested classmexer, which didn't come close to the serialization size and sourceforge SizeOf. In a small testcase, SizeOf was around 10% wrong and 10x faster than serialization. (Still transient breaks the estimation completely and since e.g. ArrayList is transient but is serialized as an Array, it's not easy to patch SizeOf. But I could live with that) On the other hand, 10x faster with 10% error doesn't seem very good. Any ideas how I could do better?

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• Reading HttpRequest Body in REST WCF

  - by madness800

  Hi All, I got a REST WCF Service running in .net 4 and I've tested the web service it is working and accepting HttpRequest I make to it. But I ran into a problem trying to access the HttpRequest body within the web service. I've tried sending random sizes of data appended on the HttpRequest using both Fiddler and my WinForm app and I can't seem to find any objects in runtime where I can find my request body is located. My initial instinct was to look in the HttpContext.Current.Request.InputStream but the length of that property is 0, so I tried looking in IncomingWebRequestContext that object doesn't even have a method nor properties to get the body of the HttpRequest. So my question is, is there actually a way to access the HttpRequest request body in WCF? PS: The data inside the request body is JSON strings and for response it would return the data inside response body as JSON string too.

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• Are Blogengine.net support posts in other language like Hindi when they written through unicode font

  - by steven spielberg

  when i test a post written in Hindi that i got the error that "Url : http://localhost:50263/BlogEngine.Web/admin/Pages/Add_entry.aspx?id=c3b7497c-60e7-41c7-ac10-36f21999f82f Raw Url : /BlogEngine.Web/admin/Pages/Add_entry.aspx?id=c3b7497c-60e7-41c7-ac10-36f21999f82f Message : A potentially dangerous Request.Form value was detected from the client (ctl00$cphAdmin$txtContent$TinyMCE1$txtContent=" ..."). Source : System.Web StackTrace : at System.Web.HttpRequest.ValidateString(String value, String collectionKey, RequestValidationSource requestCollection) at System.Web.HttpRequest.ValidateNameValueCollection(NameValueCollection nvc, RequestValidationSource requestCollection) at System.Web.HttpRequest.get_Form() at System.Web.HttpRequest.get_Item(String key) at BlogEngine.Core.Web.HttpModules.CompressionModule.context_PostReleaseRequestState(Object sender, EventArgs e) in D:\Projects\Be-1610\BlogEngine\DotNetSlave.BusinessLogic\Web\HttpModules\CompressionModule.cs:line 62 at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) " what is meaning of this error. are this support unicode ?

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

  - by rob

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

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• In OpenRasta is it possible to Pattern match multiple key/value pairs?

  - by Scott Littlewood

  Is it possible in OpenRasta to have a Uri pattern that allows for an array of values of the same key to be submitted and mapped to a handler method accepting an array of the query parameters. Example: Return all the contacts named Dave Smith from a collection. HTTP GET /contacts?filterBy=first&filterValue=Dave&filterBy=last&filterValue=Smith With a configuration of: What syntax would be best for the Uri string pattern matching? (Suggestions welcome) ResourceSpace.Has.ResourcesOfType<List<ContactResource>>() .AtUri("/contacts") .And.AtUri("/contacts?filterBy[]={filterBy}[]&filterValue[]={fv}[]") // Option 1 .And.AtUri("/contacts?filterBy={filterBy}[]&fv={fv}[]") // Option 2 Would map to a Handler method of: public object Get(params Filter[] filters) { /* create a Linq Expression based on the filters using dynamic linq query the repository using the Linq */ return Query.All<Contact>().Where(c => c.First == "Dave" && c.Last == "Smith").ToResource() } where Filter is defined by public class Filter { public string FilterBy { get; set; } public string FilterValue { get; set; } }

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• How to redefine symbol names in objects with RVCT?

  - by Batuu

  I currently develop a small OS for an embedded platform based on a ARM Cortex-M3 microcontroller. The OS provides an API for customer application development. The OS kernel and the API is compiled into a static lib by the ARMCC compiler and customer can link his application against it. The lib and the containing object files offer the complete list of symbols used in kernel. To "protect" the kernel and its inner states from extern hooking into obvious variables and functions, I would like to do some easy obfuscation by renaming the symbols randomly. The GNU binutils seems to do this by calling objcopy with the --redefine-sym flag. The GNU binutils cannot read the ARMCC / RVCT objects. Is there any solution to do this kind of obfuscation with RVCT?

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• Using ScriptCombining through a ScriptManager on a Master Page

  - by Hmobius

  ASP.NET 3.5 SP1 adds a great new ScriptCombining feature to the ScriptManager object as demonstrated on this video. However he only demonstrates how to use the feature with the ScriptManager on the same page. I'd like to use this feature on a site where the scriptmanager is on the master page but can't figure out how to add the scripts I need for each page programmatically to the manager. I've found this post to use as a starting point, but I'm not really getting very far. can anyone give me a helping hand? Thanks, Dan

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