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• Removing padding from structure in kernel module

  - by dexkid

  I am compiling a kernel module, containing a structure of size 34, using the standard command. make -C /lib/modules/$(KVERSION)/build M=$(PWD) modules The sizeof(some_structure) is coming as 36 instead of 34 i.e. the compiler is padding the structure. How do I remove this padding? Running make V=1 shows the gcc compiler options passed as make -I../inc -C /lib/modules/2.6.29.4-167.fc11.i686.PAE/build M=/home/vishal/20100426_eth_vishal/organised_eth/src modules make[1]: Entering directory `/usr/src/kernels/2.6.29.4-167.fc11.i686.PAE' test -e include/linux/autoconf.h -a -e include/config/auto.conf || ( \ echo; \ echo " ERROR: Kernel configuration is invalid."; \ echo " include/linux/autoconf.h or include/config/auto.conf are missing."; \ echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ echo; \ /bin/false) mkdir -p /home/vishal/20100426_eth_vishal/organised_eth/src/.tmp_versions ; rm -f /home/vishal/20100426_eth_vishal/organised_eth/src/.tmp_versions/* make -f scripts/Makefile.build obj=/home/vishal/20100426_eth_vishal/organised_eth/src gcc -Wp,-MD,/home/vishal/20100426_eth_vishal/organised_eth/src/.eth_main.o.d -nostdinc -isystem /usr/lib/gcc/i586-redhat-linux/4.4.0/include -Iinclude -I/usr/src/kernels/2.6.29.4-167.fc11.i686.PAE/arch/x86/include -include include/linux/autoconf.h -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Os -m32 -msoft-float -mregparm=3 -freg-struct-return -mpreferred-stack-boundary=2 -march=i686 -mtune=generic -Wa,-mtune=generic32 -ffreestanding -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -Iarch/x86/include/asm/mach-generic -Iarch/x86/include/asm/mach-default -Wframe-larger-than=1024 -fno-stack-protector -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -pg -Wdeclaration-after-statement -Wno-pointer-sign -fwrapv -fno-dwarf2-cfi-asm -DTX_DESCRIPTOR_IN_SYSTEM_MEMORY -DRX_DESCRIPTOR_IN_SYSTEM_MEMORY -DTX_BUFFER_IN_SYSTEM_MEMORY -DRX_BUFFER_IN_SYSTEM_MEMORY -DALTERNATE_DESCRIPTORS -DEXT_8_BYTE_DESCRIPTOR -O0 -Wall -DT_ETH_1588_051 -DALTERNATE_DESCRIPTORS -DEXT_8_BYTE_DESCRIPTOR -DNETHERNET_INTERRUPTS -DETH_IEEE1588_TESTS -DSNAPTYPSEL_TMSTRENA_TEVENTENA_TESTS -DT_ETH_1588_140_147 -DLOW_DEBUG_PRINTS -DMEDIUM_DEBUG_PRINTS -DHIGH_DEBUG_PRINTS -DMODULE -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(eth_main)" -D"KBUILD_MODNAME=KBUILD_STR(conxt_eth)" -c -o /home/vishal/20100426_eth_vishal/organised_eth/src/eth_main.o /home/vishal/20100426_eth_vishal/organised_eth/src/eth_main.c

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• C++ stringstream, string, and char* conversion confusion

  - by Graphics Noob

  My question can be boiled down to, where does the string returned from stringstream.str().c_str() live in memory, and why can't it be assigned to a const char*? This code example will explain it better than I can #include <string> #include <sstream> #include <iostream> using namespace std; int main() { stringstream ss("this is a string\n"); string str(ss.str()); const char* cstr1 = str.c_str(); const char* cstr2 = ss.str().c_str(); cout << cstr1 // Prints correctly << cstr2; // ERROR, prints out garbage system("PAUSE"); return 0; } The assumption that stringstream.str().c_str() could be assigned to a const char* led to a bug that took me a while to track down. For bonus points, can anyone explain why replacing the cout statement with cout << cstr // Prints correctly << ss.str().c_str() // Prints correctly << cstr2; // Prints correctly (???) prints the strings correctly? I'm compiling in Visual Studio 2008.

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• Error checking overkill?

  - by James

  What error checking do you do? What error checking is actually necessary? Do we really need to check if a file has saved successfully? Shouldn't it always work if it's tested and works ok from day one? I find myself error checking for every little thing, and most of the time if feels overkill. Things like checking to see if a file has been written to a file system successfully, checking to see if a database statement failed.......shouldn't these be things that either work or don't? How much error checking do you do? Are there elements of error checking that you leave out because you trust that it'll just work? I'm sure I remember reading somewhere something along the lines of "don't test for things that'll never really happen".....can't remember the source though. So should everything that could possibly fail be checked for failure? Or should we just trust those simpler operations? For example, if we can open a file, should we check to see if reading each line failed or not? Perhaps it depends on the context within the application or the application itself. It'd be interesting to hear what others do. Thanks, James.

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• How can I modify/merge Jinja2 dictionaries?

  - by Brian M. Hunt

  I have a Jinja2 dictionary and I want a single expression that modifies it - either by changing its content, or merging with another dictionary. >>> import jinja2 >>> e = jinja2.Environment() Modify a dict: Fails. >>> e.from_string("{{ x[4]=5 }}").render({'x':{1:2,2:3}}) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "jinja2/environment.py", line 743, in from_string return cls.from_code(self, self.compile(source), globals, None) File "jinja2/environment.py", line 469, in compile self.handle_exception(exc_info, source_hint=source) File "<unknown>", line 1, in template jinja2.exceptions.TemplateSyntaxError: expected token 'end of print statement', got '=' Two-stage update: Prints superfluous "None". >>> e.from_string("{{ x.update({4:5}) }} {{ x }}").render({'x':{1:2,2:3}}) u'None {1: 2, 2: 3, 4: 5}' >>> e.from_string("{{ dict(x.items()+ {3:4}.items()) }}").render({'x':{1:2,2:3}}) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "jinja2/environment.py", line 868, in render return self.environment.handle_exception(exc_info, True) File "<template>", line 1, in top-level template code TypeError: <lambda>() takes exactly 0 arguments (1 given) Use dict(x,**y): Fails. >>> e.from_string("{{ dict((3,4), **x) }}").render({'x':{1:2,2:3}}) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "jinja2/environment.py", line 868, in render return self.environment.handle_exception(exc_info, True) File "<template>", line 1, in top-level template code TypeError: call() keywords must be strings So how does one modify the dictionary x in Jinja2 by changing an attribute or merging with another dictionary? This question is similar to: How can I merge two Python dictionaries as a single expression? -- insofar as Jinja2 and Python are analogous.

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• SQL SERVER 2008 JOIN hints

  - by Nai

  Hi all, Recently, I was trying to optimise this query UPDATE Analytics SET UserID = x.UserID FROM Analytics z INNER JOIN UserDetail x ON x.UserGUID = z.UserGUID Estimated execution plan show 57% on the Table Update and 40% on a Hash Match (Aggregate). I did some snooping around and came across the topic of JOIN hints. So I added a LOOP hint to my inner join and WA-ZHAM! The new execution plan shows 38% on the Table Update and 58% on an Index Seek. So I was about to start applying LOOP hints to all my queries until prudence got the better of me. After some googling, I realised that JOIN hints are not very well covered in BOL. Therefore... Can someone please tell me why applying LOOP hints to all my queries is a bad idea. I read somewhere that a LOOP JOIN is default JOIN method for query optimiser but couldn't verify the validity of the statement? When are JOIN hints used? When the sh*t hits the fan and ghost busters ain't in town? What's the difference between LOOP, HASH and MERGE hints? BOL states that MERGE seems to be the slowest but what is the application of each hint? Thanks for your time and help people! I'm running SQL Server 2008 BTW. The statistics mentioned above are ESTIMATED execution plans.

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• Custom Membership in ASP.NET MVC 2

  - by Interfector

  Hello, I'm trying to make my Custom Membership starting from ASP.NET's. I have a users table created by me which has as Primary Key a Guid UserId, exactly the sames as ASP.NET's default user and membership table. I have all the Foreign Key relationships built. However, I cannot insert the user into my custom users table. The data gets inserted correctly into the default ASP.NET's tables. I have tried the following scenarios: First version Receive the user model from POST call the CreateUser method of the Membership.class (stuff gets inserted) without modifying the user object, I try to insert it using EF's AddObject I receive the following error: "Cannot insert the value NULL into column 'LoweredUserName', table 'asp.dbo.aspnet_Users'; column does not allow nulls. INSERT fails.\r\nThe statement has been terminated."} System.Exception {System.Data.SqlClient.SqlException The error actually makes sense as EF's AddObject doesn't know how to create the LoweredUserName value, and I don't want to do it, this is ASP.NET's job. Second version Receive the user model from POST call the CreateUser method of the Membership.class (stuff gets inserted) Get the Guid of the freshly inserted system user get the ASP.NET's User object and overwrite that of user.User get the ASP.NET's Membership object and overwrite that of user.Membership (remember the FKs) try again EF's AddObject new error {"The relationship between the two objects cannot be defined because they are attached to different ObjectContext objects."} System.Exception {System.InvalidOperationException} Don't know what this is, but it certenly doesn't make any sense for me. After some googleing I think that it has something to do with the context, but as I'm a beginner I don't know how to fix it. Any ideeas on how to accomplish this task are more than welcomed, especially if they follow some good practices. Thx

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• C# using consts in static classes

  - by NickLarsen

  I was plugging away on an open source project this past weekend when I ran into a bit of code that confused me to look up the usage in the C# specification. The code in questions is as follows: internal static class SomeStaticClass { private const int CommonlyUsedValue = 42; internal static string UseCommonlyUsedValue(...) { // some code value = CommonlyUsedValue + ...; return value.ToString(); } } I was caught off guard because this appears to be a non static field being used by a static function which some how compiled just fine in a static class! The specification states (§10.4): A constant-declaration may include a set of attributes (§17), a new modifier (§10.3.4), and a valid combination of the four access modifiers (§10.3.5). The attributes and modifiers apply to all of the members declared by the constant-declaration. Even though constants are considered static members, a constant-declaration neither requires nor allows a static modifier. It is an error for the same modifier to appear multiple times in a constant declaration. So now it makes a little more sense because constants are considered static members, but the rest of the sentence is a bit surprising to me. Why is it that a constant-declaration neither requires nor allows a static modifier? Admittedly I did not know the spec well enough for this to immediately make sense in the first place, but why was the decision made to not force constants to use the static modifier if they are considered constants? Looking at the last sentence in that paragraph, I cannot figure out if it is regarding the previous statement directly and there is some implicit static modifier on constants to begin with, or if it stands on its own as another rule for constants. Can anyone help me clear this up?

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• XAML Binding to complex value objects

  - by Gus

  I have a complex value object class that has 1) a number or read-only properties; 2) a private constructor; and 3) a number of static singleton instance properties [so the properties of a ComplexValueObject never change and an individual value is instantiated once in the application's lifecycle]. public class ComplexValueClass { /* A number of read only properties */ private readonly string _propertyOne; public string PropertyOne { get { return _propertyOne; } } private readonly string _propertyTwo; public string PropertyTwo { get { return _propertyTwo; } } /* a private constructor */ private ComplexValueClass(string propertyOne, string propertyTwo) { _propertyOne = propertyOne; _propertyTwo = PropertyTwo; } /* a number of singleton instances */ private static ComplexValueClass _complexValueObjectOne; public static ComplexValueClass ComplexValueObjectOne { get { if (_complexValueObjectOne == null) { _complexValueObjectOne = new ComplexValueClass("string one", "string two"); } return _complexValueObjectOne; } } private static ComplexValueClass _complexValueObjectTwo; public static ComplexValueClass ComplexValueObjectTwo { get { if (_complexValueObjectTwo == null) { _complexValueObjectTwo = new ComplexValueClass("string three", "string four"); } return _complexValueObjectTwo; } } } I have a data context class that looks something like this: public class DataContextClass : INotifyPropertyChanged { private ComplexValueClass _complexValueClass; public ComplexValueClass ComplexValueObject { get { return _complexValueClass; } set { _complexValueClass = value; PropertyChanged(this, new PropertyChangedEventArgs("ComplexValueObject")); } } } I would like to write a XAML binding statement to a property on my complex value object that updates the UI whenever the entire complex value object changes. What is the best and/or most concise way of doing this? I have something like: <Object Value="{Binding ComplexValueObject.PropertyOne}" /> but the UI does not update when ComplexValueObject as a whole changes.

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• SHA function issues

  - by Damian James

  I have this php code from my login.php if (isset($_POST['logIn'])) { $errmsg = ""; $logname = mysqli_real_escape_string($dbc, trim($_POST['usernameIn'])); $logpassword = mysqli_real_escape_string($dbc, trim($_POST['passwordIn'])); $query = "SELECT user_id, username FROM members WHERE username = '$logname' AND password = SHA('$logpassword')"; $data = mysqli_query($dbc, $query); if (mysqli_num_rows($data) == 1) { $row = mysqli_fetch_array($data); setcookie('user_id', $row['user_id'], time() + (60 * 60 * 24 * 30)); //expires after 30 days setcookie('username', $row['username'], time() + (60 * 60 * 24 * 30)); $home = 'http://' . $_SERVER['HTTP_HOST'] . dirname($_SERVER['PHP_SELF']) . '/index.php'; header('Location: ' . $home); } else { $errmsg = '<p class="errormsg">Username or password is incorrect.</p>'; } } And for some reason, it always ends up setting $errmsg in the else statement. I am sure that I'm entering information (username,password) that is correct and exists in the database. I insert my values (from a signup script) using this query: $query = "INSERT INTO members (username, password, email) VALUES ('$username', SHA('$password'), '$email')"; Anyone see the problem with this script? Thanks!

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• Importing Variables from PHP 4 into Flash

  - by Glenn

  I'm trying to get variable importing from a PHP script before I implement it into a larger project. So far all I've gotten is headaches. //this is all thats in test.php other than the open and close brackets. Normally I'd have it doing a mysql_query and putting useful information into the print statement. print( "lamegame.net/test/test.php?val=foo&id=0000&name=Glenn"); All test.as has to do is access the three variables. The problem comes in that 'val' is undefined. The id and name variables however are just fine and return 0000 and Glenn respectively. package { import flash.display.MovieClip; import flash.text.TextField; import flash.events.; import flash.net.; public class test extends MovieClip { public function test() { super(); //prep request var request:URLRequest = new URLRequest("test.php"); request.method = URLRequestMethod.GET; var loader:URLLoader = new URLLoader(); //load request loader.dataFormat = URLLoaderDataFormat.VARIABLES; loader.addEventListener(Event.COMPLETE, dataLoaded); loader.load(request); } public function dataLoaded(e:Event):void { var name = e.target.data.name; var id = e.target.data.id; var val = e.target.data.val; trace("Val: " + val + "ID: " + id + " Name: " + name); } } }

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• C# Textbox validation should only accept integer values, but allows letters as well

  - by sonny5

  if (textBox1.Text != "") // this forces user to enter something { // next line is supposed to allow only 0-9 to be entered but should block all... // ...characters and should block a backspace and a decimal point from being entered.... // ...but it is also allowing characters to be typed in textBox1 if(!IsNumberInRange(KeyCode,48,57) && KeyCode!=8 && KeyCode!=46) // 46 is a "." { e.Handled=true; } else { e.Handled=false; } if (KeyCode == 13) // enter key { TBI1 = System.Convert.ToInt32(var1); // converts to an int Console.WriteLine("TBI1 (var1 INT)= {0}", var1); Console.WriteLine("TBI1= {0}", TBI1); } if (KeyCode == 46) { MessageBox.Show("Only digits...no dots please!"); e.Handled = !char.IsDigit(e.KeyChar) && !char.IsControl(e.KeyChar); } } else { Console.WriteLine("Cannot be empty!"); } // If I remove the outer if statement and skip checking for an empty string, then // it prevents letters from being entered in the textbox. I need to do both, prevent an // empty textbox AND prevent letters from being entered. // thanks, Sonny5

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• Numeric Order By In Transact SQL (Ordering As String Instead Of Int)

  - by Pyronaut

  I have an issue where I am trying to order a result set by what I believe to be a numberic column in my database. However when I get the result set, It has sorted the column as if it was a string (So alphabetically), instead of sorting it as an int. As an example. I have these numbers, 1 , 2, 3, 4, 5, 10, 11 When I order by in Transact SQL, I get back : 1, 10, 11, 2, 3, 4, 5 I had the same issue with Datagridview's a while back, And the issue was because of the sorting being done as if it was a string. I assume the same thing is happening here. My full SQL code is : SELECT TOP (12) DATEPART(YEAR, [OrderDate]) AS 'Year', DATEPART(MONTH, [OrderDate]) AS 'Month' , COUNT(OrderRef) AS 'OrderCount' FROM [Order] WHERE [Status] LIKE('PaymentReceived') OR [Status] LIKE ('Shipped') GROUP BY DATEPART(MONTH, [OrderDate]), DATEPART(YEAR, [OrderDate]) ORDER BY DATEPART(YEAR, OrderDate) DESC, DATEPART(MONTH, OrderDate) desc DO NOTE The wrong sorting only happens when I cam calling the function from Visual Studio. As in my code is : using (SqlConnection conn = GetConnection()) { string query = @"SELECT TOP (12) DATEPART(YEAR, [OrderDate]) AS 'Year', DATEPART(MONTH, [OrderDate]) AS 'Month' , COUNT(OrderRef) AS 'OrderCount' FROM [Order] WHERE [Status] LIKE('PaymentReceived') OR [Status] LIKE ('Shipped') GROUP BY DATEPART(MONTH, [OrderDate]), DATEPART(YEAR, [OrderDate]) ORDER BY DATEPART(YEAR, OrderDate) DESC, DATEPART(MONTH, OrderDate) desc"; SqlCommand command = new SqlCommand(query, conn); command.CommandType = CommandType.Text; using (SqlDataReader reader = command.ExecuteReader()) etc. When I run the statement in MSSQL server, there is no issues. I am currently using MSSQL 2005 express edition, And Visual Studio 2005. I have tried numerous things that are strewn across the web. Including using Convert() and ABS() to no avail. Any help would be much appreciated.

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• feedparser fails during script run, but can't reproduce in interactive python console

  - by Rhubarb

  It's failing with this when I run eclipse or when I run my script in iPython: 'ascii' codec can't decode byte 0xe2 in position 32: ordinal not in range(128) I don't know why, but when I simply execute the feedparse.parse(url) statement using the same url, there is no error thrown. This is stumping me big time. The code is as simple as: try: d = feedparser.parse(url) except Exception, e: logging.error('Error while retrieving feed.') logging.error(e) logging.error(formatExceptionInfo(None)) logging.error(formatExceptionInfo1()) Here is the stack trace: d = feedparser.parse(url) File "C:\Python26\lib\site-packages\feedparser.py", line 2623, in parse feedparser.feed(data) File "C:\Python26\lib\site-packages\feedparser.py", line 1441, in feed sgmllib.SGMLParser.feed(self, data) File "C:\Python26\lib\sgmllib.py", line 104, in feed self.goahead(0) File "C:\Python26\lib\sgmllib.py", line 143, in goahead k = self.parse_endtag(i) File "C:\Python26\lib\sgmllib.py", line 320, in parse_endtag self.finish_endtag(tag) File "C:\Python26\lib\sgmllib.py", line 360, in finish_endtag self.unknown_endtag(tag) File "C:\Python26\lib\site-packages\feedparser.py", line 476, in unknown_endtag method() File "C:\Python26\lib\site-packages\feedparser.py", line 1318, in _end_content value = self.popContent('content') File "C:\Python26\lib\site-packages\feedparser.py", line 700, in popContent value = self.pop(tag) File "C:\Python26\lib\site-packages\feedparser.py", line 641, in pop output = _resolveRelativeURIs(output, self.baseuri, self.encoding) File "C:\Python26\lib\site-packages\feedparser.py", line 1594, in _resolveRelativeURIs p.feed(htmlSource) File "C:\Python26\lib\site-packages\feedparser.py", line 1441, in feed sgmllib.SGMLParser.feed(self, data) File "C:\Python26\lib\sgmllib.py", line 104, in feed self.goahead(0) File "C:\Python26\lib\sgmllib.py", line 138, in goahead k = self.parse_starttag(i) File "C:\Python26\lib\sgmllib.py", line 296, in parse_starttag self.finish_starttag(tag, attrs) File "C:\Python26\lib\sgmllib.py", line 338, in finish_starttag self.unknown_starttag(tag, attrs) File "C:\Python26\lib\site-packages\feedparser.py", line 1588, in unknown_starttag attrs = [(key, ((tag, key) in self.relative_uris) and self.resolveURI(value) or value) for key, value in attrs] File "C:\Python26\lib\site-packages\feedparser.py", line 1584, in resolveURI return _urljoin(self.baseuri, uri) File "C:\Python26\lib\site-packages\feedparser.py", line 286, in _urljoin return urlparse.urljoin(base, uri) File "C:\Python26\lib\urlparse.py", line 215, in urljoin params, query, fragment)) File "C:\Python26\lib\urlparse.py", line 184, in urlunparse return urlunsplit((scheme, netloc, url, query, fragment)) File "C:\Python26\lib\urlparse.py", line 192, in urlunsplit url = scheme + ':' + url File "C:\Python26\lib\encodings\cp1252.py", line 15, in decode return codecs.charmap_decode(input,errors,decoding_table)

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• function's return address is different from its supposed value, buffer overflow,

  - by ultrajohn

  Good day everyone! I’m trying to understand how buffer overflow works. I’m doing this for my project in a computer security course I’m taking. Right now, I’m in the process of determining the address of the function’s return address which I’m supposed to change to perform a buffer overflow attack. I’ve written a simple program based from an example I’ve read in the internet. What this program does is it creates an integer pointer that will be made to point to the address of the function return address in the stack. To do this, (granted I understand how a function/program variables get organized in the stack), I add 8 to the buffer variable’ address and set it as the value of ret. I’m not doing anything here that would change the address contained in the location of func’s return address. here's the program: Output of the program when gets excecuted: As you can see, I’m printing the address of the variables buffer and ret. I’ve added an additional statement printing the value of the ret variable (supposed location of func return address, so this should print the address of the next instruction which will get executed after func returns from execution). Here is the dump which shows the supposed address of the instruction to be executed after func returns. (Underlined in green) As you can see, that value is way different from the value printed contained in the variable ret. My question is, why are they different? (of course in the assumption that what I’ve done are all right). Else, what have I done wrong? Is my understanding of the program’s runtime stack wrong? Please, help me understand this. My project is due nextweek and I’ve barely touched it yet. I’m sorry if I’m being demanding, I badly need your help.

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• Error displaying a WinForm in Design mode with a custom control on it.

  - by George

  I have a UserControl that is part of a Class library. I reference this project from my solution. This adds a control from the referenced project to my toolbox. I add tghe control to a form. Everything looks good, I compile all and run. Perfect... But when I close the .frm with the control on it and re-open it, I get this error. The code continues to run. It may have something to do with namespaces. The original namespace was simply "Design" and this was ambiguous and conflicting so i decided to rename it. I think that's when my problems began. To prevent possible data loss before loading the designer, the following errors must be resolved: 2 Errors Ignore and Continue Why am I seeing this page? Could not find type 'Besi.Winforms.HtmlEditor.Editor'. Please make sure that the assembly that contains this type is referenced. If this type is a part of your development project, make sure that the project has been successfully built using settings for your current platform or Any CPU. Instances of this error (1) 1. There is no stack trace or error line information available for this error. Help with this error Could not find an associated help topic for this error. Check Windows Forms Design-Time error list Forum posts about this error Search the MSDN Forums for posts related to this error The variable 'Editor1' is either undeclared or was never assigned. Go to code Instances of this error (1) 1. BesiAdmin frmOrder.Designer.vb Line:775 Column:1 Show Call Stack at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.Error(IDesignerSerializationManager manager, String exceptionText, String helpLink) at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeExpression(IDesignerSerializationManager manager, String name, CodeExpression expression) at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeExpression(IDesignerSerializationManager manager, String name, CodeExpression expression) at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeStatement(IDesignerSerializationManager manager, CodeStatement statement) Help with this error MSDN Help Forum posts about this error Search the MSDN Forums for posts related to this error

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• SQL Query slow in .NET application but instantaneous in SQL Server Management Studio

  - by user203882

  Here is the SQL SELECT tal.TrustAccountValue FROM TrustAccountLog AS tal INNER JOIN TrustAccount ta ON ta.TrustAccountID = tal.TrustAccountID INNER JOIN Users usr ON usr.UserID = ta.UserID WHERE usr.UserID = 70402 AND ta.TrustAccountID = 117249 AND tal.trustaccountlogid = ( SELECT MAX (tal.trustaccountlogid) FROM TrustAccountLog AS tal INNER JOIN TrustAccount ta ON ta.TrustAccountID = tal.TrustAccountID INNER JOIN Users usr ON usr.UserID = ta.UserID WHERE usr.UserID = 70402 AND ta.TrustAccountID = 117249 AND tal.TrustAccountLogDate < '3/1/2010 12:00:00 AM' ) Basicaly there is a Users table a TrustAccount table and a TrustAccountLog table. Users: Contains users and their details TrustAccount: A User can have multiple TrustAccounts. TrustAccountLog: Contains an audit of all TrustAccount "movements". A TrustAccount is associated with multiple TrustAccountLog entries. Now this query executes in milliseconds inside SQL Server Management Studio, but for some strange reason it takes forever in my C# app and even timesout (120s) sometimes. Here is the code in a nutshell. It gets called multiple times in a loop and the statement gets prepared. cmd.CommandTimeout = Configuration.DBTimeout; cmd.CommandText = "SELECT tal.TrustAccountValue FROM TrustAccountLog AS tal INNER JOIN TrustAccount ta ON ta.TrustAccountID = tal.TrustAccountID INNER JOIN Users usr ON usr.UserID = ta.UserID WHERE usr.UserID = @UserID1 AND ta.TrustAccountID = @TrustAccountID1 AND tal.trustaccountlogid = (SELECT MAX (tal.trustaccountlogid) FROM TrustAccountLog AS tal INNER JOIN TrustAccount ta ON ta.TrustAccountID = tal.TrustAccountID INNER JOIN Users usr ON usr.UserID = ta.UserID WHERE usr.UserID = @UserID2 AND ta.TrustAccountID = @TrustAccountID2 AND tal.TrustAccountLogDate < @TrustAccountLogDate2 ))"; cmd.Parameters.Add("@TrustAccountID1", SqlDbType.Int).Value = trustAccountId; cmd.Parameters.Add("@UserID1", SqlDbType.Int).Value = userId; cmd.Parameters.Add("@TrustAccountID2", SqlDbType.Int).Value = trustAccountId; cmd.Parameters.Add("@UserID2", SqlDbType.Int).Value = userId; cmd.Parameters.Add("@TrustAccountLogDate2", SqlDbType.DateTime).Value =TrustAccountLogDate; // And then... reader = cmd.ExecuteReader(); if (reader.Read()) { double value = (double)reader.GetValue(0); if (System.Double.IsNaN(value)) return 0; else return value; } else return 0;

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• Code Golf: Quickly Build List of Keywords from Text, Including # of Instances

  - by Jonathan Sampson

  I've already worked out this solution for myself with PHP, but I'm curious how it could be done differently - better even. The two languages I'm primarily interested in are PHP and Javascript, but I'd be interested in seeing how quickly this could be done in any other major language today as well (mostly C#, Java, etc). Return only words with an occurrence greater than X Return only words with a length greater than Y Ignore common terms like "and, is, the, etc" Feel free to strip punctuation prior to processing (ie. "John's" becomes "John") Return results in a collection/array Extra Credit Keep Quoted Statements together, (ie. "They were 'too good to be true' apparently")Where 'too good to be true' would be the actual statement Extra-Extra Credit Can your script determine words that should be kept together based upon their frequency of being found together? This being done without knowing the words beforehand. Example: "The fruit fly is a great thing when it comes to medical research. Much study has been done on the fruit fly in the past, and has lead to many breakthroughs. In the future, the fruit fly will continue to be studied, but our methods may change." Clearly the word here is "fruit fly," which is easy for us to find. Can your search'n'scrape script determine this too? Source text: http://sampsonresume.com/labs/c.txt Answer Format It would be great to see the results of your code, output, in addition to how long the operation lasted.

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• Http Requests POST vs GET

  - by behrk2

  Hi everyone, I am using a lot of HTTP Requests in an application that I am writing which uses OAuth. Currently, I am sending my GET and POST requests the same way: HttpConnection connection = (HttpConnection) Connector.open(url + connectionParameters); connection.setRequestMethod(method); connection.setRequestProperty("WWW-Authenticate", "OAuth realm=api.netflix.com"); int responseCode = connection.getResponseCode(); And this is working fine. I am successfully POSTing and GETing. However, I am worried that I am not doing POST the right way. Do I need to include in the above code the following if-statement? if (method.equals("POST") && postData != null) { connection.setRequestProperty("Content-type", "application/x-www-form-urlencoded"); connection.setRequestProperty("Content-Length", Integer .toString(postData.length)); OutputStream requestOutput = connection.openOutputStream(); requestOutput.write(postData); requestOutput.close(); } If so, why? What's the difference? I would appreciate any feedback. Thanks!

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• Dojo: Programatically setting checkbox label for adding on TableContainer

  - by Det

  Hi there, after some hours of checking out documentation, I am somewhat desperate: Basically I need to populate a TabContainer with some TextBoxes, and some Checkboxes. All theses neatly arranged: Labels to the left, fields to the right. To have this done I use a TableContainer that I add to the TabContainer, create the TextFields and add them to the TableContainer. All is rendered ok. But when it comes to a checkbox, I can't find the trick to have a label displayed at all. If I: - add a label-attribute to creation statement say: var text8 = new dijit.form.CheckBox({ id:"zuschauer_" + i, value: "zuschauer", label:"fritt"}); Firefox comes up with a "containerNode is null" - Error try to add a tag: Nothing is shown (no error, but alas: no label): var text9 = dojo.create('<label>'); dojo.attr(text9,"for","zuschauer_" + i); dojo.attr(text9,"content","fritt"); try to add a div or somewhat else on the tablecontainer (disabled Labels): Firefox comes up whith: Error: uncaught exception: [Exception... "Component returned failure code: 0x80004003 (NS_ERROR_INVALID_POINTER) [nsIDOMHTMLDivElement.appendChild]" nsresult: "0x80004003 (NS_ERROR_INVALID_POINTER)" location: "JS frame :: ... same is for created TextNodes... So how the hack: - Would I generate a label to a checkbox programatically (no html template possible, I've seen the code around, creating a checkbox but having a 'label for' on the html before. This would not be helpful, as I don't know how many checkboxes I need at designtime. These are to be genereated completly at runtime. - Would I have this very simple design done programatically, Must be easy, this is not rocket sience. Do I really need the TableContainer to have this done? - Can I create static text in a TableContainer? Any hint would be helpful Desperate Det

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• Anyone got a nifty credit expiry algorithm?

  - by garethkeenan

  Our website uses a credit system to allow users to purchase inexpensive digital goods (eg. photos). We use credits, rather than asking the user to pay for items individually, because the items are cheap and we are trying to keep our credit-card/PayPal overhead low. Because we aren't a bank, we have to expire credits after a certain amount of time. We expire deposit credits after a year, but other types of credits (bonuses, prizes, refunds) may have a different shelf-life. When a buyer buys an item, we spend the credit that is going to expire first. Our current system keeps track of every deposit by storing the original value and the remainder to be spent. We keep a list of all purchases as well, of course. I am currently moving to a system which is much more like a traditional double-entry accounting system. A deposit will create a ledger item, increasing the user's 'spending' account balance. Every purchase will also create a ledger item, decreasing the user's 'spending' account balance. The new system has running balances, while the old system does not, which greatly improves our ability to find problems and do reconciliations. We do not want to use the old system of keeping a 'remainder' value attached to each deposit record because it is inefficient to replay a user's activities to calculate what the remainder of each deposit is over time (for the user's statement). So, after all of this verbose introduction, my question is "Does anyone else out there have a similar system of expiring credits?" If you could describe how you calculate expired credits it would be a great help. If all expired credits had the exact same shelf life, we would be able to calculate the expired amount using: Total Deposits - Total Spending - Deposits Not Due To Expire = Amount to Expire However, because deposits can have different shelf lives, this formula does not work because more than one deposit can be partially spent at any given time.

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• Distance between Long Lat coord using SQLITE

  - by munchine

  I've got an sqlite db with long and lat of shops and I want to find out the closest 5 shops. So the following code works fine. if(sqlite3_prepare_v2(db, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) { while (sqlite3_step(compiledStatement) == SQLITE_ROW) { NSString *branchStr = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)]; NSNumber *fLat = [NSNumber numberWithFloat:(float)sqlite3_column_double(compiledStatement, 1)]; NSNumber *fLong = [NSNumber numberWithFloat:(float)sqlite3_column_double(compiledStatement, 2)]; NSLog(@"Address %@, Lat = %@, Long = %@", branchStr, fLat, fLong); CLLocation *location1 = [[CLLocation alloc] initWithLatitude:currentLocation.coordinate.latitude longitude:currentLocation.coordinate.longitude]; CLLocation *location2 = [[CLLocation alloc] initWithLatitude:[fLat floatValue] longitude:[fLong floatValue]]; NSLog(@"Distance i meters: %f", [location1 getDistanceFrom:location2]); [location1 release]; [location2 release]; } } I know the distance from where I am to each shop. My question is. Is it better to put the distance back into the sqlite row, I have the row when I step thru the database. How do I do that? Do I use the UPDATE statement? Does someone have a piece of code to help me. I can read the sqlite into an array and then sort the array. Do you recommend this over the above approach? Is this more efficient? Finally, if someone has a better way to get the closest 5 shops, love to hear it.

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• Castle ActiveRecord / NHibernate Linq Querys with ValueTypes

  - by Thomas Schreiner

  Given the following code for our Active Record Entites and ValueTypes Linq is not working for us. [ActiveRecord("Person")] public class PersonEntity : ActiveRecordLinqBase<PersonEntity> { string _name; [Property("Name", Length = 20, ColumnType = "string", Access = PropertyAccess.FieldCamelcaseUnderscore)] public Name Name { get { return NameValue.Create(_name);} set { _name = value.DataBaseValue; } } ... } public abstract class Name : IValueType { string DataBaseValue {get;set;} ... } public class Namevalue : Name { string _name; private NameValue(string name) { _name = name; } public static NameValue Create(string name) { return new NameValue(name); } ... } We tried to use linq in the following way so far with no success: var result = from PersonEntity p in PersonEntity.Queryable where p.Name == "Thomas" select p; return result.First(); // throws exception Cannot convert string into Name We tried and implemented a TypeConverter for Name, but the converter never got called. Is there a way to have linq working with this ValueTypes? Update: Using NHibernate.UserTypes.IUserType it sortof works. I Implemented the Interface as described here: http://stackoverflow.com/questions/1565056/how-to-implement-correctly-iusertype I still had to add a ConversionOperator from string to Name and had to call it Explicitly in the linq Statement, even though it was defined as implicit. var result = from PersonEntity p in PersonEntity.Queryable where p.Name == (Name)"Thomas" select p; return result.First(); //Now works

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• attachment_fu and RMagick

  - by trobrock

  After finally getting RMagick installed on my Mac I have set up attachment_fu according to the tutorial here: http://clarkware.com/cgi/blosxom/2007/02/24#FileUploadFu&gt when I try and upload a file via the upload form I get around 80 messages like these: /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/lib/RMagick.rb:44: warning: already initialized constant PercentGeometry /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/lib/RMagick.rb:45: warning: already initialized constant AspectGeometry /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/lib/RMagick.rb:46: warning: already initialized constant LessGeometry /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/lib/RMagick.rb:47: warning: already initialized constant GreaterGeometry I did some searching and found that this problem can arise when you require RMagick twice in an application using different casing for the require statement: http://work.rowanhick.com/2007/12/19/require-rmagick-and-case-sensitivity/ I am not requiring it myself, but I was thinking maybe with the config.gem "rmagick" line in my environment.rb file rails might be requiring it. After the form submits it gives me a validation error of: Content type is not included in the list I have checked the source for attachement_fu and found the image/png in the list of content types so I don't believe that is the proper error message: http://github.com/technoweenie/attachment_fu/blob/master/lib/technoweenie/attachment_fu.rb Does anyone have any ideas on how I can get this to work?

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• jvm version for Websphere 6.1.0.23on Solaris

  - by dr jerry

  Hi I'm at big financial institute and we've an application running on Websphere 6.1. on Solaris. Due to MQ Connectivity we had to install fixpack 6.1.0.23. Unfortunately this broke an ejb (1.1) which is still there as legacy (Test missed it). [3/23/10 11:33:18:703 CET] 00000055 EJBContainerI E WSVR0068E: Attempt to start EnterpriseBean EventRisk_1.0.0#EventRiskEJB.jar#PolicyDataManager failed with exception: java.lang.NoSuchMethodError: com.ibm.ejs.csi.ResRefListImpl.(Lorg/eclipse/jst/j2ee/ejb/EnterpriseBean;Lcom/ibm/ejs/models/base/bindings/ejbbnd/EnterpriseBeanBinding;Lcom/ibm/ejs/models/base/extensions/ejbext/EnterpriseBeanExtension;)V at com.ibm.ws.metadata.ejb.EJBMDOrchestrator.finishBMDInit(EJBMDOrchestrator.java:1364) at com.ibm.ws.runtime.component.EJBContainerImpl.finishDeferredBeanMetaData(EJBContainerImpl.java:4829) at com.ibm.ws.runtime.component.EJBContainerImpl$3.run(EJBContainerImpl.java:4631) at java.security.AccessController.doPrivileged(Native Method) at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:125) at com.ibm.ws.runtime.component.EJBContainerImpl.initializeDeferredEJB(EJBContainerImpl.java:4627) at com.ibm.ejs.container.HomeOfHomes.getHome(HomeOfHomes.java:390) at com.ibm.ejs.container.HomeOfHomes.internalCreateWrapper(HomeOfHomes.java:938) at com.ibm.ejs.container.EJSContainer.createWrapper(EJSContainer.java:4783) at com.ibm.ejs.container.WrapperManager.faultOnKey(WrapperManager.java:545) at com.ibm.ejs.util.cache.Cache.findAndFault(Cache.java:498) at com.ibm.ejs.container.WrapperManager.keyToObject(WrapperManager.java:489) We cannot reproduce the issue on our desktop boxes (it all works fine there) and we do not have direct access to our the Solaris machines (dependent on the deployment department) we do suspect a discrepancy on the jvm but we're not sure. My question is two fold: can you confirm IBM's statement that fixpack 6.1.0.23 for solaris indeed runs on jvm 1.5.0_17b04 our installation tells us ./java -version java version "1.5.0_13" But deploy department is not eager to investigate. Do you see some other solution, apart from hiring big blue's con$ultancy? kind regards, Jeroen.

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• MFMailComposeViewController hangs my app

  - by Neal L

  Hi, I am trying to add email functionality to my app. I can get the MFMailComposeViewController to display correctly and pre-populate its subject and body, but for some reason when the user clicks on the "Cancel" or "Send" buttons in the nav bar the app just hangs. I inserted a NSLog() statement into the first line of mailComposeController"didFinishWithResult:error and it doesn't even print that line out to the console. Does anybody have an idea what would cause the MFMailComposeViewController to hang like that? Here is my code from the header: #import "ManagedObjectEditor.h" #import <MessageUI/MessageUI.h> @interface MyManagedObjectEditor : ManagedObjectEditor <MFMailComposeViewControllerDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate> { } - (IBAction)emailObject; @end from the implementation file: if ([MFMailComposeViewController canSendMail]) { MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc] init]; mailComposer.delegate = self; [mailComposer setSubject:NSLocalizedString(@"An email from me", @"An email from me")]; [mailComposer setMessageBody:emailString isHTML:YES]; [self presentModalViewController:mailComposer animated:YES]; [mailComposer release]; } [error release]; [emailString release]; and here is the code from the callback: #pragma mark - #pragma mark Mail Compose Delegate Methods - (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error { NSLog(@"in didFinishWithResult:"); switch (result) { case MFMailComposeResultCancelled: NSLog(@"cancelled"); break; case MFMailComposeResultSaved: NSLog(@"saved"); break; case MFMailComposeResultSent: NSLog(@"sent"); break; case MFMailComposeResultFailed: { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Error sending email!",@"Error sending email!") message:[error localizedDescription] delegate:nil cancelButtonTitle:NSLocalizedString(@"Bummer",@"Bummer") otherButtonTitles:nil]; [alert show]; [alert release]; break; } default: break; } [self dismissModalViewControllerAnimated:YES]; } Thanks!

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