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  • Interview Question in C#

    - by amutha
    A Technical Lead asked me that ,he created a class,he declared object and initialized it.But some circumstance we may get "null reference" exception.He explained there are 1000 reasons for that and asked me to tell a single reason.I am unable to figure it out. What the reason(s) ,we may get such exception?

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  • How to read dynamical added check box?

    - by Manoj
    Hi, I am adding checkboxes dynamically to silverlight stackpanel object as follows: foreach (String userName in e.Result) { CheckBox ch = new CheckBox(); ch.Name = userName; ch.Content = userName; ContentStackPanel.Children.Add(ch); } How do I read back those controls to detect which of them are checked.

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  • How to secure an AJAX call from a facebook canvas application.

    - by user259349
    Reading this Ajax example, http://wiki.developers.facebook.com/index.php/FBJS/Examples/Ajax#Working_Example I found the following line. I'm not sure what to understand out of it, how do you "check the sig values per Platform spec"? "Note: For brevity's sake we are trusting $_POST['fb_sig_user'] without checking the full signature. This is unsafe as anyone could easily forge a user's action. Always be sure to either use the Facebook object which is supplied with the client libraries, or check the sig values per Platform spec"

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  • how do you convert a directoryInfo file to string

    - by steve
    Problem is that i cant convert to string Dim path As String = "..\..\..\Tier1 downloads\CourseVB\" If countNumberOfFolders > 0 Then 'if there is a folder then ' make a reference to a directory Dim di As New IO.DirectoryInfo(path) Dim diar1 As IO.DirectoryInfo() = di.GetDirectories() Dim dra As IO.DirectoryInfo 'list the names of all files in the specified directory For Each dra In diar1 Dim lessonDirectoryName() As Lesson lessonDirectoryName(0).lessonName = dra Next 'the the lesson is an object, and lessonName is the property of type string. How do i convert the directoryInfo to string?

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  • Linq for java

    - by Milhous
    Would a LINQ for java be a useful tool? I have been working on a tool that will allow a java object to map to a row in a database. Would this be useful for java programmers? What features would be useful?

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  • Using Facebook Connect auth.RevokeAuthorization in ASP.NET

    - by Focus
    I'm confused as to how revoking authorization works in the ASP.NET Toolkit. I've tried issuing the following: ConnectSession connect = new ConnectSession(FacebookHelper.ApiKey(), FacebookHelper.SecretKey()); Auth x = new Auth(fbSession); x.RevokeAuthorization(); But I get an object reference error during the RevokeAuthorization call. Here's the call definition. Any idea what I'm doing wrong?

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  • reverse this function

    - by ooo
    i have code that takes a csharp datetime and converts it into a long to plot in the "flot" graph. here is the code public static long GetJavascriptTimestamp(DateTime input) { TimeSpan span = new TimeSpan(DateTime.Parse("1/1/1970").Ticks); DateTime time = input.Subtract(span); return (long)(time.Ticks / 10000); } I now need an opposite function where i take this long value and get the csharp datetime object back. any idea if the above method can be reversed ?

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  • How do you write your QTP Tests?

    - by Josh Harris
    I am experimenting with using QTP for some webapp ui automation testing and I was wondering how people usually write their QTP tests. Do you use the object map, descriptive programming, a combination or some other way all together? Any little code example would be appreciated, Thank you

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  • copy array from one class to another class array

    - by shishir.bobby
    hi all, i hv an array ("array A", which contains 3 objects, fox ex, to,from,message) in class "A". and in class "B",i m having another array ("array B"),which fills tableview,of class "B" only. i need to fill tableview,with the values of class A's array (i.e array A,with the object values, to,from,message). how can i do it?? how to copy array from another class ? i hope i m clear with my question regards shishir

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  • Problem in retrieving the ini file through web page

    - by MalarN
    Hi All, I am using an .ini file to store some values and retrieve values from it using the iniparser. When I give (hardcode) the query and retrive the value through the command line, I am able to retrive the ini file and do some operation. But when I pass the query through http, then I am getting an error (file not found), i.e., the ini file couldn't be loaded. Command line : int main(void) { printf("Content-type: text/html; charset=utf-8\n\n"); char* data = "/cgi-bin/set.cgi?pname=x&value=700&url=http://IP/home.html"; //perform some operation } Through http: .html function SetValue(id) { var val; var URL = window.location.href; if(id =="set") { document.location = "/cgi-bin/set.cgi?pname="+rwparams+"&value="+val+"&url="+URL; } } .c int * Value(char* pname) { dictionary * ini ; char *key1 = NULL; char *key2 =NULL; int i =0; int val; ini = iniparser_load("file.ini"); if(ini != NULL) { //key for fetching the value key1 = (char*)malloc(sizeof(char)*50); if(key1 != NULL) { strcpy(key1,"ValueList:"); key2 = (char*)malloc(sizeof(char)*50); if(key2 != NULL) { strcpy(key2,pname); strcat(key1,key2); val = iniparser_getint(ini, key1, -1); if(-1 == val || 0 > val) { return 0; } } else { //error free(key1); return; } } else { printf("ERROR : Memory Allocation Failure "); return; } } else { printf("ERROR : .ini File Missing"); return; } iniparser_freedict(ini); free(key1); free(key2); return (int *)val; } void get_Value(char* pname,char* value) { int result =0; result = Value(pname); printf("Result : %d",result); } int main(void) { printf("Content-type: text/html; charset=utf-8\n\n"); char* data = getenv("QUERY_STRING"); //char* data = "/cgi-bin/set.cgi?pname=x&value=700&url=http://10.50.25.40/home.html"; //Parse to get the values seperately as parameter name, parameter value, url //Calling get_Value method to set the value get_Value(final_para,final_val); } * file.ini * [ValueList] x = 100; y = 70; When the request is sent through html page, I am always getting .ini file missing. If directly the request is sent from C file them it works fine. How to resolve this?

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  • Python read multiline JSON

    - by Paul W
    I have been trying to use JSON to store settings for a program. I can't seem to get Python 2.6 's JSON Decoder to decode multi-line JSON strings... Here is example input: .settings file: """ {\ 'user':'username',\ 'password':'passwd',\ }\ """ I have tried a couple other syntaxes for this file, which I will specify below (with the traceback they cause). My python code for reading the file in is import json settings_text = open(".settings", "r").read() settings = json.loads(settings_text) The Traceback for this is: Traceback (most recent call last): File "json_test.py", line 4, in <module> print json.loads(text) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/__init__.py", line 307, in loads return _default_decoder.decode(s) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 322, in decode raise ValueError(errmsg("Extra data", s, end, len(s))) ValueError: Extra data: line 1 column 2 - line 7 column 1 (char 2 - 41) I assume the "Extra data" is the triple-quote. Here are the other syntaxes I have tried for the .settings file, with their respective Tracebacks: "{\ 'user':'username',\ 'pass':'passwd'\ }" Traceback (most recent call last): File "json_test.py", line 4, in <module> print json.loads(text) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/__init__.py", line 307, in loads return _default_decoder.decode(s) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 319, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 336, in raw_decode obj, end = self._scanner.iterscan(s, **kw).next() File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/scanner.py", line 55, in iterscan rval, next_pos = action(m, context) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 155, in JSONString return scanstring(match.string, match.end(), encoding, strict) ValueError: Invalid \escape: line 1 column 2 (char 2) '{\ "user":"username",\ "pass":"passwd",\ }' Traceback (most recent call last): File "json_test.py", line 4, in <module> print json.loads(text) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/__init__.py", line 307, in loads return _default_decoder.decode(s) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 319, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 338, in raw_decode raise ValueError("No JSON object could be decoded") ValueError: No JSON object could be decoded If I put the settings all on one line, it decodes fine.

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  • updatepanel problem or possible bug

    - by Woland
    I have textbox and lable in update panel witch i refresh with javascript __doPostBack(upEditReminder,id); then i set both label and textbox text to current datetime protected void upReminder_Onload(object sender, EventArgs e) { lbTest.Text = DateTime.Now.ToString(); tbReminder.Text = DateTime.Now.ToString(); Problem is that lable is updated but textbox date is updated only once when the page is loaded but not when __doPostBack(upEditReminder,id); is triggered. I cant figure out whats the problem Your help is much appreciated

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  • How to get the selectionchange event in Qt

    - by Solitaire
    Hi.. I have a class inherited from Qwidget, now in that class I will be creating "Qlistview" object and filling up the items to view.. When the selection of items in the listview gets changed I want to get the "selectionchange" event to come.. So how can I achieve this.. pls tell me in brief... thanks

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  • Books for experienced .NET developer learning PHP/MySQL

    - by webworm
    Hi All, I am an experienced .NET developer (C#/ASP.NET) looking to broaden my skills to the PHP/MySQL arena. I would like get recommendations on books for learning PHP/MySQL that are geared towards someone who is already familiar with object oriented programming and web development. I do realize that there are lots of online material out there but I am looking for an actual print book I can read. Thanks a bunch.

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  • How do you set the twitter user location in JTwitter?

    - by Gregg Reno
    I'm building some basic Twitter functionality into my app, and am using the JTwitter JAR to read and set status. It looks like there is a User class that can be used to set the location, but I just can't figure out how to set it with my GPS coordinates once I've got my Twitter object. Has anyone been able to set the user.location property using JTwitter? Thanks, -Gregg

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  • NoMethodError for time_zone_select in a form

    - by Jack
    I've set up my app exactly in line with the Railscasts Time Zone Episode 1 but when I run <%= f.time_zone_select :time_zone, ActiveSupport::TimeZone.us_zones %> I get this error NoMethodError in Users#new Showing app/views/users/new.html.erb where line #27 raised: You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.<= With line 27 being the aforementioned line. I am really stuck on this...

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  • Calling ADODB inside a function?

    - by David
    Hi, I'm wondering why when i put an sql ADODB query in side a function it produces the following error: Fatal error: Call to a member function Execute() on a non-object in -path to script- My function is something like: $dsn = 'mysql://user:pass@localhost/db'; $db = ADONewConnection($dsn); function getem($q){ $r=$db->Execute($q); return $r->RecordCount(); } echo getem("select * from table"); Any ideas how to fix that?

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  • Delete rectangle using c#?

    - by C. Karunarathne
    Can I delete the old rectangle which I have drawn and draw a new rectangle? private void panel1_MouseClick(object sender, MouseEventArgs e) { Graphics g = this.panel1.CreateGraphics(); Pen pen = new Pen(Color.Black, 2); g.DrawRectangle(pen, 100,100, 100, 200); g.dispose(); }

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  • CBlobResult gives pains.... using Visual C++ 2008... opencv

    - by kaushalyjain
    When I type the following code line.. where img_hsv is a Mat image... IplImage abc=img_hsv; // object that will contain blobs of inputImage CBlobResult blobs; // Extract the blobs using a threshold of 100 in the image blobs = CBlobResult(&abc,NULL,100,true); It displays the following error... error C2661: 'CBlobResult::CBlobResult' : no overloaded function takes 4 arguments.. Any help is welcome...!!

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  • asp.net not deserializing soap response

    - by Tanya
    Hi all, I have been given a wsdl and have used wsdl.exe to create my proxy classes. I am able to call the function to initiate the request with some valid parameters and this returns my response object which is always EMPTY. When i inspect the soap message response using fiddler the soap does have valid data that should be deserialzed to the proxy classes. Can i manually intercept the derserializing call of the proxy classes generated by wsdl and check that .net is correctly derializing the soap response? Thank you

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  • NHibernate criteria query question

    - by Chris
    I have 3 related objects (Entry, GamePlay, Prize) and I'm trying to find the best way to query them for what I need using NHibernate. When a request comes in, I need to query the Entries table for a matching entry and, if found, get a) the latest game play along with the first game play that has a prize attached. Prize is a child of GamePlay and each Entry object has a GamePlays property (IList). Currently, I'm working on a method that pulls the matching Entry and eagerly loads all game plays and associated prizes, but it seems wasteful to load all game plays just to find the latest one and any that contain a prize. Right now, my query looks like this: var entry = session.CreateCriteria<Entry>() .Add(Restrictions.Eq("Phone", phone)) .AddOrder(Order.Desc("Created")) .SetFetchMode("GamePlays", FetchMode.Join) .SetMaxResults(1).UniqueResult<Entry>(); Two problems with this: It loads all game plays up front. With 365 days of data, this could easily balloon to 300k of data per query. It doesn't eagerly load the Prize child property for each game. Therefore, my code that loops through the GamePlays list looking for a non-null Prize must make a call to load each Prize property I check. I'm not an nhibernate expert, but I know there has to be a better way to do this. Ideally, I'd like to do the following (pseudocode): entry = findEntry(phoneNumber) lastPlay = getLatestGamePlay(Entry) firstWinningPlay = getFirstWinningGamePlay(Entry) The end result of course is that I have the entry details, the latest game play, and the first winning game play. The catch is that I want to do this in as few database calls as possible, otherwise I'd just execute 3 separate queries. The object definitions look like: public class Entry { public Guid Id {get;set;} public string Phone {get;set;} public IList<GamePlay> GamePlays {get;set;} // ... other properties } public class GamePlay { public Guid Id {get;set;} public Entry Entry {get;set;} public Prize Prize {get;set;} // ... other properties } public class Prize { public Guid Id {get;set;} // ... other properties } The proper NHibernate mappings are in place, so I just need help figuring out how to set up the criteria query (not looking for HQL, don't use it).

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  • Parse XML and populate in List Box

    - by cedar715
    I've posted the same question here and I've also got couple of good answers as well. While I was trying the same answers, I was getting compilation errors. Later I got to know that we are using .NET 2.0 and our existing application has no references to LINQ files. After searching in SO, i tried to figured out partly: public partial class Item { public object CHK { get; set; } public int SEL { get; set; } public string VALUE { get; set; } } Parsing: XmlDocument doc = new XmlDocument(); doc.LoadXml("<LISTBOX_ST> <item><CHK></CHK><SEL>00001</SEL><VALUE>val01</VALUE></item> <item><CHK></CHK><SEL>00002</SEL><VALUE>val02</VALUE></item> <item><CHK></CHK><SEL>00003</SEL><VALUE>val03</VALUE></item> <item><CHK></CHK><SEL>00004</SEL><VALUE>val04</VALUE></item> <item><CHK></CHK><SEL>00005</SEL><VALUE>val05</VALUE></item> </LISTBOX_ST>"); List<Item> _lbList = new List<Item>(); foreach (XmlNode node in doc.DocumentElement.ChildNodes) { string text = node.InnerText; //or loop through its children as well //HOW - TO - POPULATE THE ITEM OBJECT ?????? } listBox1.DataSource = _lbList; listBox1.DisplayMember = "VALUE"; listBox1.ValueMember = "SEL"; How to read two child nodes - SEL and VALUE of node and populate the same in the new Item DTO??

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  • Python mistaking float for string

    - by wrongusername
    I receive TypeError: Can't convert 'float' object to str implicitly while using Gambler.pot += round(self.bet + self.money * 0.1) where pot, bet, and money are all doubles (or at least are supposed to be). I'm not sure if this is yet another Eclipse thing, but how do I get the line to compile? Code where bet and money are initialized: money = 0 bet = 0

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