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  • How to Change Type of a VARIANT

    - by nimo
    Hi, I'm having a VARIANT with its type set to VT_R8. Subsequently I need to change its type to VT_BSTR. I would like know whether there is a way of resetting a VARIANT status. Thus, I noticed that every time I set value to the VARIANT (in my case, its double) , VARIANT itself set its bstrVal member to a bad pointer, even though I set bstrVal member to NULL at the initialization of VARIANT. Why such thing is happening ? Is it safe to use a VARIANT as structure where both dbVal and bstrVal member are set ? Please clarify, thank you.

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  • PHP find if file data is an image

    - by Christian Sciberras
    Imagine I have some file data in a variable $data. I need to determine whether it is an image or not. No need for details such as corrupt images etc. Firs thought would be getting the file mime type by looking at the magic number and then see whether "image" is in the mime type. No such luck, even if I have a "file extension to mime type" script, I don't have a reliable way to get mime from magic number. My next option was to have a reasonable list of image file magic numbers and consult them. However, it relatively difficult to find such magic numbers (gif for instance has different magic numbers, some of which could pretty rare - if memory serves me right). A better idea would be some linux program which can do this kind of thing. Any ideas? I'm running RHEL and PHP 5.3. I've got root access - ie able to install stuff if needed. - Chris.

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  • Single C++/CLI method to wrap many type specific C functions

    - by T33C
    I am wrapping a C library using C++/CLI so that the C library can be used easily from C# in a C#'ish way. Some of the functions in this library are for putting a value into a container. There are no generics in C so there exists a function per type CLIB_SetBool(BOOL value), CLIB_SetInt(int value), CLIB_SetString(char* string) and so on. To make it easier to use from C#, I have created a single Set function which takes a System::Object. I have two related questions: With my method how would you use a switch statement on the type of System::Object to call the correct CLIB_Setxxxx function. [typeid is only for unmanaged code and I can't seem to use GetType.] Is there a better way to wrap these functions like using a Generic? [I started using template specialisation but then realised that C# doesn't see templates.] Thanks.

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  • How to change a vairable type in C#?

    - by Mosho Mulan
    I wanted to use something like this: if(x==5) { var mydb= ........ ; } else { var mydb = ........ ; } but it didn't work because I can't declare a variable inside if statement. So I tried to do this: var mydb; if (x==5) { mydb= ............. ; } else { mydb=.............; } but id didn't work either because I had to initialize the variable (mydb). So the question is: I don't necessarily know the type of the variable, can I declare it anyway and then change the type inside the if statement?

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  • Core Data: Detecting the type and casting it

    - by Tim Sullivan
    I have set up a Core Data model that includes an entity, Item with a 1-M relationship with the abstract entity Place, so that an item has many places. There are several entities with the parent set to Place. I want to set up several UI elements depending on the descendent place types. I have a loop that looks something like this: for (Place *place in item.places) { } ... but I'm not sure how to detect what type the place is, and how to cast it to the proper type so that I can access its properties. Thanks for any help!

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  • anonymous type and multiple properties

    - by ognjenb
    I have this error: An anonymous type cannot have multiple properties with the same name. Whether this can be resolved with alias ie, whether an alias exists in LINQ var device_query = from d in DevicesEntities.device join dt in DevicesEntities.devicetype on d.DeviceTypeId equals dt.Id join l in DevicesEntities.location on d.Id equals l.DeviceId join loc in DevicesEntities.locationname on l.LocationNameId equals loc.Id where l.DeviceId == d.Id select new { d.Id, d.DeviceTypeId, d.SerialNumber, d.FirmwareRev, d.ProductionDate, d.ReparationDate, d.DateOfLastCalibration, d.DateOfLastCalibrationCheck, d.CalCertificateFile, d.Notes, d.TestReportFile, d.WarrantyFile, d.CertificateOfOriginFile, d.QCPermissionFile, d.Reserved, d.ReservedFor, d.Weight, d.Price, d.SoftwareVersion, dt.Name, dt.ArticleNumber, dt.Type, l.StartDate, //AS LastStartDate, l.LocationNameId, loc.Name //in this line I have problem };

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  • Casting in mixed type calculations in C?

    - by yCalleecharan
    Hi, If I define these variables: double x0, xn, h; int n; and I have this mathematical expression: h = (xn - x0)/n; Is it necessary that I cast n into double prior doing the division for maximum accuracy like in h = (xn - x0)/ (double) n; I wrote a program to check the above but both expressions give the same answers. I understand that C will promote the integer to double type as variables xn and x0 are of type double but strangely enough in a book, the second expression with casting was emphasized. Thanks a lot...

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  • return type while using GMP.h header file

    - by Raveesh_Kumar
    While i m using gmp.h header file. i need a fuction which takes inputs of type mpz_t and return mpz_t type too. I m very beginner of using gmp.h So, Here is snaps follows of my approached code.... mpz_t sum_upto(mpz_t max) { mpz_t sum; mpz_init(sum); mpz_init(result); for(int i=0;i<=max-1;i++) mpz_add_ui(sum,sum,pow(2,i)); return sum; } but it will show error 1 ." pow has been not used in this scope.",although i have added math.h in very beginnig of the file. 2 . sum_upto declared as function returning an array... do tell as soon as possible. i have to complete my very big project....

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  • A generic Find method to search by Guid type for class implementing IDbSet interface

    - by imak
    I am implementing a FakeDataSet class by implementing IDbSet interface. As part of implementing this interface, I have to implement Find method. All my entity classes has an Guid type Id column. I am trying to implement Find method for this FakeDbSet class but having hard time to write it in a generic way. Below is my attempts for writing this method but since it does not know about Id been Guid type, I am getting compilation error on m.Id call. Any ideas on how this could be accomplished? public class FakeDataSet<T> : IDbSet<T> where T: class, new() { // Other methods for implementing IDbSet interface public T Find(params object[] keyValues) { var keyValue = (Guid)keyValues.FirstOrDefault(); return this.SingleOrDefault(m => m.Id == keyValue); // How can I write this } }

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  • Get all Methods with a given return type

    - by Aren B
    Is this code wrong? It's just not returning anything: public IEnumerable<string> GetMethodsOfReturnType(Type cls, Type ret) { var methods = cls.GetMethods(BindingFlags.NonPublic); var retMethods = methods.Where(m => m.ReturnType.IsSubclassOf(ret)) .Select(m => m.Name); return retMethods; } It's returning an empty enumerator. Note: I'm calling it on a ASP.NET MVC Controller looking for ActionResults GetMethodsOfReturnType(typeof(ProductsController), typeof(ActionResult));

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  • Apache returns 304, I want it to ignore anything from client and send the page

    - by Ayman
    I am using Apache HTTPD 2.2 on Windows. mod_expires is commented out. Most other stuff are not changed from the defaults. gzip is on. I made some changes to my .js files. My client gets one 304 response for one of the .js files and never gets the rest. How can I force Apache to sort of flush everything and send all new files to the client? The main html file includes these scripts in the head section of the main page: <script src="js/jquery-1.7.1.min.js" type="text/javascript"> </script> <script src="js/jquery-ui-1.8.17.custom.min.js" type="text/javascript"></script> <script src="js/trex.utils.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.core.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.codes.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.emv.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.b24xtokens.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.iso.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.span2.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.amex.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.abi.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.barclays.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.bnet.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.visa.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.atm.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.apacs.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.pstm.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.stm.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.thales.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.fps-saf.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.fps-iso.js" type="text/javascript" charset="utf-8"></script> <script src="js/trex.app.js" type="text/javascript" charset="utf-8"></script> Apache access log has the following: [07/Jul/2013:16:50:40 +0300] "GET /trex/index.html HTTP/1.1" 200 2033 "-" [07/Jul/2013:16:50:40 +0300] "GET /trex/js/trex.fps-iso.js HTTP/1.1" 304 [08/Jul/2013:07:54:35 +0300] "GET /trex/index.html HTTP/1.1" 304 - "-" [08/Jul/2013:07:54:35 +0300] "GET /trex/js/trex.iso.js HTTP/1.1" 200 12417 [08/Jul/2013:07:54:35 +0300] "GET /trex/js/trex.amex.js HTTP/1.1" 200 6683 [08/Jul/2013:07:54:35 +0300] "GET /trex/js/trex.fps-saf.js HTTP/1.1" 200 2925 [08/Jul/2013:07:54:35 +0300] "GET /trex/js/trex.fps-iso.js HTTP/1.1" 304 Chrome request headers are as below: THis file is ok, latest: Request URL:http://localhost/trex/js/trex.iso.js Request Method:GET Status Code:200 OK (from cache) THis file is ok, latest: Request URL:http://localhost/trex/js/trex.amex.js Request Method:GET Status Code:200 OK (from cache) This one is also ok: Request URL:http://localhost/trex/js/trex.fps-iso.js Request Method:GET Status Code:200 OK (from cache) The rest of the scrips all have 200 OK (from cache).

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  • Problems upgrading VB.Net 2008 project into VS2010

    - by Brett Rigby
    Hi there, I have been upgrading several different VS2008 projects into VS2010 and have found a problem with VB.Net projects when they are converted. Once converted, the .vbproj files have changed from this in VS2008: <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <DefineDebug>true</DefineDebug> <DefineTrace>true</DefineTrace> <OutputPath>bin\Debug\</OutputPath> <DocumentationFile>CustomerManager.xml</DocumentationFile> <WarningsAsErrors>41999,42016,42017,42018,42019,42020,42021,42022,42032,42036</WarningsAsErrors> </PropertyGroup> To this in VS2010: <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <DefineDebug>true</DefineDebug> <DefineTrace>true</DefineTrace> <OutputPath>bin\Debug\</OutputPath> <DocumentationFile>CustomerManager.xml</DocumentationFile> <NoWarn>42353,42354,42355</NoWarn> <WarningsAsErrors>41999,42016,42017,42018,42019,42020,42021,42022,42032,42036</WarningsAsErrors> </PropertyGroup> The main difference, is that in the VS2010 version, the 42353,42354,42355 value has been added; Inside the IDE, this manifests itself as the following setting in the Project Properties | Compile section as: "Function returning intrinsic value type without return value" = None This isn't a problem when building code inside Visual Studio 2010, but when trying to build the code through our continuous integration scripts, it fails with the following errors: [msbuild] vbc : Command line error BC2026: warning number '42353' for the option 'nowarn' is either not configurable or not valid [msbuild] vbc : Command line error BC2026: warning number '42354' for the option 'nowarn' is either not configurable or not valid [msbuild] vbc : Command line error BC2026: warning number '42355' for the option 'nowarn' is either not configurable or not valid I couldn't find anything on Google for these messages, which is strange, as I am trying to find out why this is happening. Any suggestions as to why Visual Studio 2010's conversion wizard is doing this?

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  • How do I convert Word files to PDF programmatically?

    - by Shaul
    I have found several open-source/freeware programs that allow you to convert .doc files to .pdf files, but they're all of the application/printer driver variety, with no SDK attached. I have found several programs that do have an SDK allowing you to convert .doc files to .pdf files, but they're all of the proprietary type, $2,000 a license or thereabouts. Does anyone know of any clean, inexpensive (preferably free) programmatic solution to my problem, using C# or VB.NET? Thanks!

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  • how to save excel file in MS SQL Server 2005

    - by Anish Mohan
    I have a table in which there are two columns : 1. import type, 2. Excel import template. The second column - "Excel import template" should store the whole excel file. How would I save excel file in databse...can I use binary datatype column, convert excel file to bytes and save the same ? Thanks in advance !

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  • How to use objects as modules/functors in Scala?

    - by Jeff
    Hi. I want to use object instances as modules/functors, more or less as shown below: abstract class Lattice[E] extends Set[E] { val minimum: E val maximum: E def meet(x: E, y: E): E def join(x: E, y: E): E def neg(x: E): E } class Calculus[E](val lat: Lattice[E]) { abstract class Expr case class Var(name: String) extends Expr {...} case class Val(value: E) extends Expr {...} case class Neg(e1: Expr) extends Expr {...} case class Cnj(e1: Expr, e2: Expr) extends Expr {...} case class Dsj(e1: Expr, e2: Expr) extends Expr {...} } So that I can create a different calculus instance for each lattice (the operations I will perform need the information of which are the maximum and minimum values of the lattice). I want to be able to mix expressions of the same calculus but not be allowed to mix expressions of different ones. So far, so good. I can create my calculus instances, but problem is that I can not write functions in other classes that manipulate them. For example, I am trying to create a parser to read expressions from a file and return them; I also was trying to write an random expression generator to use in my tests with ScalaCheck. Turns out that every time a function generates an Expr object I can't use it outside the function. Even if I create the Calculus instance and pass it as an argument to the function that will in turn generate the Expr objects, the return of the function is not recognized as being of the same type of the objects created outside the function. Maybe my english is not clear enough, let me try a toy example of what I would like to do (not the real ScalaCheck generator, but close enough). def genRndExpr[E](c: Calculus[E], level: Int): Calculus[E]#Expr = { if (level > MAX_LEVEL) { val select = util.Random.nextInt(2) select match { case 0 => genRndVar(c) case 1 => genRndVal(c) } } else { val select = util.Random.nextInt(3) select match { case 0 => new c.Neg(genRndExpr(c, level+1)) case 1 => new c.Dsj(genRndExpr(c, level+1), genRndExpr(c, level+1)) case 2 => new c.Cnj(genRndExpr(c, level+1), genRndExpr(c, level+1)) } } } Now, if I try to compile the above code I get lots of error: type mismatch; found : plg.mvfml.Calculus[E]#Expr required: c.Expr case 0 = new c.Neg(genRndExpr(c, level+1)) And the same happens if I try to do something like: val boolCalc = new Calculus(Bool) val e1: boolCalc.Expr = genRndExpr(boolCalc) Please note that the generator itself is not of concern, but I will need to do similar things (i.e. create and manipulate calculus instance expressions) a lot on the rest of the system. Am I doing something wrong? Is it possible to do what I want to do? Help on this matter is highly needed and appreciated. Thanks a lot in advance. After receiving an answer from Apocalisp and trying it. Thanks a lot for the answer, but there are still some issues. The proposed solution was to change the signature of the function to: def genRndExpr[E, C <: Calculus[E]](c: C, level: Int): C#Expr I changed the signature for all the functions involved: getRndExpr, getRndVal and getRndVar. And I got the same error message everywhere I call these functions and got the following error message: error: inferred type arguments [Nothing,C] do not conform to method genRndVar's type parameter bounds [E,C genRndVar(c) Since the compiler seemed to be unable to figure out the right types I changed all function call to be like below: case 0 => new c.Neg(genRndExpr[E,C](c, level+1)) After this, on the first 2 function calls (genRndVal and genRndVar) there were no compiling error, but on the following 3 calls (recursive calls to genRndExpr), where the return of the function is used to build a new Expr object I got the following error: error: type mismatch; found : C#Expr required: c.Expr case 0 = new c.Neg(genRndExpr[E,C](c, level+1)) So, again, I'm stuck. Any help will be appreciated.

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  • difference between Convert.ToInt32 and (int)

    - by balalakshmi
    the following syntax throws an compile time error like Cannot convert type 'string' to 'int' string name=(Session["name1"].ToString()); int i = (int)name; whereas the code below compiles and executes successfully string name=(Session["name1"].ToString()); int i = Convert.ToInt32(name); I would like to know 1) why the compile time error occurs in first code 2) what's the difference between the 2 code snippets

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  • Struts2 converting empty string parameter to an "int"

    - by Kyle Partridge
    How does one convert an empty string to an int using Struts2. When the application encounters this parameter with no value, like from an empty text field, it throws the following exception. java.lang.NoSuchMethodException: com.XXXXXXXXXXXX.setID([Ljava.lang.String;) Where ID is an integer, and the URL is: Something.action?ID=&other=rawr Is there a way to do this without using an Integer (class)? Do I have to write a type converter?

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  • scala 2.8 implict java collections conversions

    - by nablik
    I have problem with JavaConversions with 2.8 beta: import scala.collection.JavaConversions._ class Utils(dbFile : File, sep: String) extends IUtils { (...) def getFeatures() : java.util.List[String] = csv.attributes.toList } And then exception: [INFO] Utils.scala:20: error: type mismatch; [INFO] found : List[String] [INFO] required: java.util.List[String] [INFO] def getFeatures() : java.util.List[String] = csv.attributes.toList [INFO]

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  • Array from HTML forms - Internal Server Error

    - by user1392411
    I try to make a requestform for our school. But if I transmit this form I get a "Internal Server Error". I searched but I found nothing like that. Also I don't get a only this error message "Internal Server Error", nothing more. Any ideas why? <!DOCTYPE html> <html> <head> <title></title> <meta charset="utf-8"> <meta name="description" content=""> <link rel="stylesheet" href="../css/normalize.css" /> <link rel="stylesheet" href="../css/bestellformular.css" /> <!-- HTML 5 in Internet Explorer 9 und kleiner aktivieren --> <!--[if lt IE 9]> <script type="textt/javascript" src="js/html5shiv.js"></script> <![endif]--> </head> <body> <section id="head"> </section> <form action="../php/einlesen.php" method="post"> <section id="body"> <h1>Bestellung</h1> <table> <colgroup> <col width="10%"> <col width="80%"> <col width="10%"> </colgroup> <tr> <th> Artikel-Nr. </th> <th> Artikel </th> <th> Menge </th> </tr> <tr> <td> <input type="number" placeholder="Artikel-Nr." name="articelnr[]" required /> </td> <td> <input type="text" placeholder="Name des Artikels" name="articelname[]" required /> </td> <td> <input type="number" placeholder="Menge" name="quantity[]" required /> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> <tr> <td> <input type="number" name="articelnr[]" /> </td> <td> <input type="text" name="articelname[]" /> </td> <td> <input type="number" name="quantity[]"/> </td> </tr> </table> </section> <section id="info"> <div class="left"> <hr /> <p> Kundennummer <input type="text" /> </p> </div> <div class="right"> <table> <tr> <td>Firma</td> <td><input type="text" name="company"required /></td> </tr> <tr> <td>Ort, PLZ</td> <td><input type="text" name="place" required /></td> <td><input type="number" name="plz" class="number" required /></td> </tr> <tr> <td>Straße, Nr.</td> <td><input type="text" name="street"required /></td> <td><input type="number" name="streetnr" class="number" required /></td> </tr> <tr> <td>Telefon</td> <td><input type="tel" name="tel" required /></td> </tr> <tr> <td>Fax</td> <td><input type="text" name="fax" required /></td> </tr> <tr> <td>E-Mail</td> <td><input type="email" name="email" required /></td> </tr> <tr> <td>Datum</td> <td><input type="date" name="date" required placeholder="tt.mm.jj"/></td> </tr> </table> </div> </section> <section id="submit"> <input type="checkbox" name="agb" required /> Ich habe die <a href="../docs/agb.pdf">AGB</a> gelesen und akzeptiere diese. <input type="submit" value="Bestellung Abschicken"/> </section> </form> <section id="footer"> <hr /> </section> </body> </html> Any Ideas why? The data is sent to a yet empty PHP document. The bracelets in the name tag are used to get an array. My PHP version is 5.3.8

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