Qfile Read Binary

Wireshark shows the source and destination fields of the UDP packet are empty. QFile is an I/O device for reading and writing text and binary files and resources. What is Base 64 Encoded Data? Put simply, base64 encoded data is a string of character that contains only a-z, A-Z, 0-9, + and / characters and is often used in situations when sending non-text information via a text only transmission protocol. A data stream is a binary stream of encoded information which is 100% independent of the host computer's operating system, CPU or byte order. Anupriya Rathore QA Sunday, 5 January 2014 the default value is 0, which means perform a binary comparison. A couple of things here: float **img; is not a 2D pointer. I am however confused over something involved reading the data in a binary file, so here goes. Reading and Writing Text. txt file, item's position is set. But regarding SMB shares this might be related to some Windows 7 settings in combination to older SAMBA versions (don't know which version is run by your Qnap NAS). , read or write one file at a time. Our most recent information indicates that PCAP files are associated with only a single known file type, the Packet Capture Data format, and can be viewed primarily with Wireshark, including two other known software applications (listed below). Trying to read a binary file in Qt. For example: 00 01 BE 00 00 00 00 00 00 00 00 00 01. It will cover the important parts of Qt's platform independent file and file system classes. The process of saving a game generally involves serializing each game object's member variables to a file. Edit: Oh, it's a binary. txt and file2. Reading binary file of doubles. Just make sure you get the support page for your motherboard and go to the downloads section. The file name is usually passed in the constructor, but it can be set at any time using setFileName (). To get the information from the binary file it would appear that certain functions need to be called in a certain order. For opening files and manipulating them via handles refer to module std. Go to Base64 Convertor. I tried to read binary files using XMLHttpRequest, but in this case there is a distortion. But when you come around to reading it, how do you know the length? One way is to write the length in the first four bytes, then write the data. QResource gives direct access to the bytes in their raw format. Reading files line by line in C++ using ifstream: dealing correctly with badbit, failbit, eofbit, and perror(). e what is the important function should I use in this issu). For instance, if you have a QFile and read from it directly using QFile. Browse the source code of qtbase/tests/auto/corelib/io/qfile/tst_qfile. The executable bit should already be set then. Contacto: carlosduarte. A data stream is a binary stream of encoded information which is 100% inde- pendent of the host computer's operating system, CPU or byte order. There are two main functions used to read and write binary files in C Programming i. Most resources helpfully point out that you can do this in C++. QFile is an I/O device for reading and writing binary and text files. just a small window with a text field that reads text or anything really from a file, i assume i have to make my own slot, but im lost. I am using a streamwriter to create a new text file and write data to it. QFile is an I/O device for reading and writing binary and text files. Using STL File I/O. BE is 190, so I scroll forward to the last byte above and I know the next 190 bytes are my data. ts video file created with VLC, QUdpSocket sends out corrupted packets. Are you looking for the ways to access the file system using JavaScript? If your JavaScript code could access local files of the visitor to your site, it would be a huge security problem. Can't read QList from a file. Settings Things Up: I wrote a C# Console application to test many different techniques to read a text file and process the lines contained therein. 2), but it can be set to read older. Since each is a power of 2, it follows a pattern of 0,1,2,4,8 for each hex position. mpt" file or read out each partition separately into binary file ("*. Hi, I'm trying to read a file as a binary, byte-by-byte, and strangely nothing seems to work with QFile. With text files it's impossible to seek to the data because you never know exactly where it's at. QFile、QBuffer和QTcpSocket可支持读写设备,用open函数打开,用write或putChar函数写入。用read和readLine或readAll进行读取数据,最后用 close函数进行关闭设备。 1. The Windows and Linux encoder binaries support 8-bit and 10-bit internal bit-depth and output. Have you created a bug report for the broken PTX when omitting __read_only with an image2d_t? ljbadenz I have had the same issues with the broken PTX and the compiler crashing. CFile works in conjunction with the CArchive class to support serialization of Microsoft Foundation Class objects. *TEXT The file contains data in textual form. AbstractControl_CodeGenerator; AjaxTimingForm. Using the actions, Read and ReadBinary, we can read out a single entry file at a time into a ColdFusion variable. I have this short example of using the fileUtils. First of all it puzzles me a bit too that you say you cannot reach the web interface (HTTP) of the NAS via the browser. Then i found a ZTE Grand S 2, snapdragon 801 this time, same folder structure like LG G2, was able to repair it too, after reading how to back up G2's imei topic's. The returned value is the actual number of bytes read, or zero if the end of the stream is reached. Append one section at a time until you've added all the sections you want included and then you pass the firstitem pointer as parameter to CURLOPT_HTTPPOST. \ingroup io: QFile is an I/O device for reading and writing binary and text files. Similarly data can be written to the stream using writeRawBytes(). A memory-mapped file is a segment of virtual memory that has been assigned a direct byte-for-byte correlation with some portion of a file or file-like resource. QProcess is used to start an external process, and to read from and write to that process. Another possibility would be to use a module and class name e. QT file reading example i was wondering if someone out there who knows qt well could either direct me to an example or show me one simmilar to what i need. Open binary file for write-operation: 8. QFile is an I/O device for reading and writing text and binary files and resources. Continue reading "How to Convert Unreadable Binary to Readable QString". I have a problem in writing a new line to a text file. It will convert it to a serialized binary stream, when you view that stream in the file it won't be readable (but thats normal). The returned value is the actual number of bytes read, or zero if the end of the stream is reached. Examples of how to read from a file and write to a file in a Linux bash shell script. Qt is the faster, smarter way to create innovative devices, modern UIs & applications for multiple screens. Functions in this module handle files as a unit, e. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. The file name is usually passed in the constructor, but it can be set at any time using setFileName (). The QFile class is an I/O device that operates on files. Reading files line by line in C++ using ifstream: dealing correctly with badbit, failbit, eofbit, and perror(). QDebug class provides an output stream for debugging information. Create file with QFile: 3. The QIODevice class is the abstract superclass of all such devices; classes such as QFile, QBuffer and QSocket inherit QIODevice and implement virtual functions such as write() appropriately. A data stream is a binary stream of encoded information which is 100% independent of the host computer's operating system, CPU or byte order. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. A QFile may be used by itself or more conveniently with a QDataStream or QTextStream. i am trying to read some file's contents from within an amarok script i included qt core bindings var myfile new qfile path amarok alert myfile size returns the correct [scripting] Using QFile to read files • KDE Community Forums. For opening files and manipulating them via handles refer to module std. First of all it puzzles me a bit too that you say you cannot reach the web interface (HTTP) of the NAS via the browser. QFile is an I/O device for reading and writing text and binary files and resources. But regarding SMB shares this might be related to some Windows 7 settings in combination to older SAMBA versions (don't know which version is run by your Qnap NAS). To get the information from the binary file it would appear that certain functions need to be called in a certain order. For the lazy, there is also the possibility to include a whole module using #include. Argument mode specifies the opening mode. When the above C++ program is compile and executed, it will produce the following result:. This is a short example of how to rename files in a directory using the Qt toolkit. A memory-mapped file is a segment of virtual memory that has been assigned a direct byte-for-byte correlation with some portion of a file or file-like resource. use decarrays implicit none!include 'arrays_combine. Python Write Binary Blob To File. Serialization is then as easy as decomposing objects into fundamental types or using the raw read and write functions to write binary data directly. \ingroup io: QFile is an I/O device for reading and writing binary and text files. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. readRawData();) so I'm new in Qt and I am looking for read some binary numbers from file is my code how can I alter my code (i. Below is a full example of such a workflow, including reading the image back from the database and displaying it:. We just cannot use anything in our public API that doesn't have the same binary compatibility guarantees that Qt has, or stricter guarantees. I'm trying to learn C++ and I would interested in how I could write better code. QDataStream supports many Qt data types, including QByteArray, QFont, QImage, QMap, QPixmap, QString, QValueList, and QVariant. Edit: Oh, it's a binary. For example: 00 01 BE 00 00 00 00 00 00 00 00 00 01. Indirection is often useful when interacting with the resource entity as if it is a file, this can be achieved with PySide. Our most recent information indicates that QML files are associated with only a single known file type, the QT Meta Language File format, and can be viewed with the Qt SDK software package (developed by The Qt Company). The offset parameter gives the offset of the byte in array (the buffer index) at which to begin reading, and the count parameter gives the maximum number of bytes to be read from this stream. It is read into the variable "itemListSize" from sceneData. Settings Things Up: I wrote a C# Console application to test many different techniques to read a text file and process the lines contained therein. Read text file line by line: 9. 1) Open file1. By reading x and y coordinate of the QGraphicsItem from sceneData. I have a problem in writing a new line to a text file. Otherwise, subsequent Read calls repeatedly return a null value. They are written in hexadecimal because it's more compact that binary, but still shows the binary nature of the numbers. - // The installer binary on OSX and Windows does not contain the binary + // The installer binary on macOS and Windows does not contain the binary // content, it's put into the resources folder as separate file. For example, 0011 (binary). Actions Codegen Controls. First of all it puzzles me a bit too that you say you cannot reach the web interface (HTTP) of the NAS via the browser. Edit: Oh, it's a binary. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. The process of saving a game generally involves serializing each game object's member variables to a file. For the lazy, there is also the possibility to include a whole module using #include. How to split QbyteArray most efficiently? I am not reading it from the file. You can also use a data stream to read/write raw unencoded binary data. QFile is an I/O device for reading and writing text and binary files and resources. For instance, if you have a QFile and read from it directly using QFile. 3) Run a loop to one by one copy characters of file1. See the list of data types which can be serialized here. In order to convert binary to decimal, basic knowledge on how to read a binary number might help. Learn more about Teams. Continue reading "How to Convert Unreadable Binary to Readable QString". A QFile may be: used by itself or, more conveniently, with a QTextStream or: QDataStream. I am however confused over something involved reading the data in a binary file, so here goes. A data stream is a binary stream of encoded information which is 100% independent of the host computer's operating system, CPU or byte order. So, we'll write (save) a file and then read (load) it back. i am trying to read some file's contents from within an amarok script i included qt core bindings var myfile new qfile path amarok alert myfile size returns the correct [scripting] Using QFile to read files • KDE Community Forums. The binary representation of Qt types has evolved quite a lot since Qt 1. You should probably also attempt to store the dynamic properties, and ensure that there's at least some potential for backwards compatibility. Qt | Cross-platform software development for embedded & desktop. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. Additionally your binary format is fine for very simple objects. CURL is a great tool for making requests to servers; especially, I feel it is great to use for testing APIs. Actually i want to write into the file with spaces. // An example of reading from a binary file // This example verifies the write in Example 3 #include qFile. Writing a 2D array to a file. The program is executed from the command line as: plot3d_to_cgns options XYZfile Qfile CGNSfile. We need to do in two steps. Unless it's a binary file where you know the offset to the data you want, the only way to read the pieces you need is to read the whole file then extract the data from that. If the file given by FileHandle is a typed file (one defined to contained defined records), then these values must be of the same type (record). A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. Reading files line by line in C++ using ifstream: dealing correctly with badbit, failbit, eofbit, and perror(). readRawData();) so I'm new in Qt and I am looking for read some binary numbers from file is my code how can I alter my code (i. CFile works in conjunction with the CArchive class to support serialization of Microsoft Foundation Class objects. setFileName:设置文件路径函数来设置;. C / C++ Forums on Bytes. QFile、QBuffer和QTcpSocket可支持读写设备,用open函数打开,用write或putChar函数写入。用read和readLine或readAll进行读取数据,最后用 close函数进行关闭设备。 1. In this sample serialized QGprahicsItem is created on the QGraphicsScene by reading related data from a text file. In a batch file try: for /f %%a in (file. Functions in this module handle files as a unit, e. A data stream is a binary stream of encoded information which is 100% independent of the host computer's operating system, CPU or byte order. QProcess is used to start an external process, and to read from and write to that process. I tried to run photorec on my QNAP TS212P but got this error: cannot execute binary file Do I need to use this version instead of the x86_64 version (from the TestDisk/PhotoRec downloads page): Marvell 88F628x Linux 2. Qt Centre is a community site devoted to programming in C++ using the Qt framework. The type printed will usually contain one of the words text (the file contains only printing characters and a few common control characters and is probably safe to read on an ASCII terminal), executable (the file contains the result of compiling a program in a form understandable to a kernel), or data meaning anything else (usually binary or. Read/write binary files array of structs String writing using Binary Writer in C Sharp. Most resources helpfully point out that you can do this in C++. I am using a streamwriter to create a new text file and write data to it. Networking and reading and writing XML are such substantial topics that we cover separately in their own dedicated chapters (Chapter 15 and Chapter 16). A QFile may be -124: used by itself or, more conveniently, with a QTextStream or -125. The file name is usually passed in the constructor, but it can be set at any time using setFileName (). QFile is an I/O device for reading and writing binary and text files. What is Base 64 Encoded Data? Put simply, base64 encoded data is a string of character that contains only a-z, A-Z, 0-9, + and / characters and is often used in situations when sending non-text information via a text only transmission protocol. Started with nubia series, i was lucky to find a way in only 2 hours reading the web and could repair the imei. readRawData();) so I'm new in Qt and I am looking for read some binary numbers from file is my code how can I alter my code (i. PCAP File Summary. QBasic can deal with SDF and CSV files, and can read and write to files Randomly, Sequentialy or using byte positions. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. You can also use a data stream to read/write raw unencoded binary data. In Qt to achieve this goal QDataStream can be used. C# program that read all directories and files on computer & it is running on and writes them to database. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. Actions Codegen Controls. Open a text file in read-only mode: 7. QFile is an I/O device for reading and writing text and binary files and resources. Qt5 Tutorial: QMap, QFile (Serialization) In this tutorial, we will learn about QFile (Serialization). Here "BE" is at offset BB in the file. You then create a QTextStream object that works with the QFile object and read the data by means of the normal C++ input operators or with QTextStream::readLine(). The QFile class provides an interface for reading from and writing to files. When sending a datagram read from a. The executable bit should already be set then. For example a data stream that is written by a PC under Windows can be read by a Sun SPARC running Solaris. See the list of data types which can be serialized here. The QDataStream class provides serialization of binary data to a QIODevice. You can also use a data stream to read/write raw unencoded binary data. QFile is an I/O device for reading and writing text and binary files and resources. Otherwise, subsequent Read calls repeatedly return a null value. where XYZfile and CGNSfile are required. And like i said, use the update utility built into the BIOS and it will check that you have a valid binary for your motherboard before initiating the update. For binary data, there is a cross-platform binary stream called QDataStream. Java object Serialization is an API provided by Java Library stack as a means to serialize Java objects. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. The type printed will usually contain one of the words text (the file contains only printing characters and a few common control characters and is probably safe to read on an ASCII terminal), executable (the file contains the result of compiling a program in a form understandable to a kernel), or data meaning anything else (usually binary or. Started by digimonkey, 4th November 2014 08:16. Step 1 : File on the system is read to a. A QFile may be used by itself or more conveniently with a QDataStream or QTextStream. To put it simply, whenever to want to store, transfer (send or receive) or do anything else with the contents of a binary file (in this example, an image file) you can use Base64 encoding to simplify things by converting unreadable binary contents to a readable string. A MAY CONTAIN U. After each introduction of the classes some actual code is used to further demonstrate the use of the classes. Using STL File I/O. QDataStream. Using the actions, Read and ReadBinary, we can read out a single entry file at a time into a ColdFusion variable. You should consider this. Qt5 Tutorial: QMap, QFile (Serialization) In this tutorial, we will learn about QFile (Serialization). Nonobvious binary numbers have the term binary enclosed in parentheses at the end of the number. For example a data stream that is written by a PC under Windows can be read by a Sun SPARC running Solaris. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Normally, for binary file i/o you do not use the conventional text-oriented << and >> operators! It can be done, but that is. Qt is the faster, smarter way to create innovative devices, modern UIs & applications for multiple screens. Create QFile from file path: 2. fstream for reading and writing from/to one file. Open QFile with WriteOnly flag: 4. Read/write binary files array of structs String writing using Binary Writer in C Sharp. The file name is usually passed in the constructor, but it can be set at any time using setFileName (). It can be used for the analysis of earthquake records, as well as for examining seismogram sections in refraction seismology. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. I tried to read binary files using XMLHttpRequest, but in this case there is a distortion. Serialization Vs Binary protocol. When sending a datagram read from a. QFile is an I/O device for reading and writing binary and text files. Used for all disk files, but care must be taken as it is very easy to overwrite data with this method. QFile is an I/O device for reading and writing text and binary -123: files and \l{The Qt Resource System}{resources}. If you are looking for information about Qt related issue — register and post your question. Create QFile from file path: 2. curl_formadd() is used to append sections when building a multipart/formdata HTTP POST (sometimes referred to as RFC 2388-style posts). QFile is an I/O device for reading and writing text and binary files and resources. This resource is typically a file that is physically present on disk, but can also be a device, shared memory object, or other resource that the operating system can reference through a file descriptor. You should probably also attempt to store the dynamic properties, and ensure that there's at least some potential for backwards compatibility. Are you looking for the ways to access the file system using JavaScript? If your JavaScript code could access local files of the visitor to your site, it would be a huge security problem. For instance, if you have a QFile and read from it directly using QFile. 이게 뜰 줄은 몰랐네 '의외의 소재'로 대박난 방송 '스파이더맨' 톰 홀랜드, 로다주와 재회…기다린 투샷. The executable bit should already be set then. You can also use a data stream to read/write raw unencoded binary data. QProcess is used to start an external process, and to read from and write to that process. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. QBasic can deal with SDF and CSV files, and can read and write to files Randomly, Sequentialy or using byte positions. // An example of reading from a binary file // This example verifies the write in Example 3 #include qFile. If the modules being related have the same name and version but different languages or if the related module has a version of HIGHEST or LOWEST and is qualified by language, the LANGUAGE parameter must be specified. I have a problem in writing a new line to a text file. In the previous post, we saw the difficulty in reading a file with QML. xlsx and the other excel file formats. This means that every binary number could be represented as powers of 2, with the rightmost one being in the position of 2 0. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. While binary file formats are typically more compact than text-based formats, they are not human-readable or human-editable. Qt is the faster, smarter way to create innovative devices, modern UIs & applications for multiple screens. Multiple simultaneous read locks are allowed, as long as there are no exclusive locks. For instance, if you have a QFile and read from it directly using QFile. Streaming to files circle6 The read and write methods feel awkward in many situations - handling complex types, etc circle6 A modern approach is to use stream operators circle6 Qt offers two types of stream operators circle6 For handling text files circle6 For handling binary file formats. For instance, if you have a QFile and read from it directly using readLine() instead of using the stream, the text stream's internal position will be out of sync with the file's position. A closer relative to iostream would be QTextStream. secondly you should know the boundries of the stream to read the binary file. Read byte array from text file: 10. fstream for reading and writing from/to one file. The QFile class provides an interface for reading from and writing to files. Can't read QList from a file. QProcess is used to start an external process, and to read from and write to that process. A QDataStream object is used to serialize binary data so that it can be stored in a QIODevice and retrieved again later. just a small window with a text field that reads text or anything really from a file, i assume i have to make my own slot, but im lost. QFile may be used by itself or, more conveniently, with a PySide. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. The binary representation of Qt types has evolved quite a lot since Qt 1. In the simplest terms, encoding is how the raw binary data of a file (the 0s and 1s that comprise a file on the disk) is interpreted and displayed in the editor as legible text that can be manipulated with your keyboard. Trying to read a binary file in Qt. Also shows how to use a for loop when reading a file, and handling lines with blank spaces. I am however confused over something involved reading the data in a binary file, so here goes. QFile is an I/O device for reading and writing text and binary files and resources. xda-developers Lenovo ZUK Z2 (Plus) Lenovo ZUK Z2 (Plus) Questions & Answers Sahara fail!! help! tried EVERYTHING! by edulus91 XDA Developers was founded by developers, for developers. Qt5 Tutorial: QMap, QFile (Serialization) In this tutorial, we will learn about QFile (Serialization). secondly you should know the boundries of the stream to read the binary file. Qt is the faster, smarter way to create innovative devices, modern UIs & applications for multiple screens. Similarly data can be written to the stream using writeRawBytes(). My code is as follows: program do_combine. Reading binary file of doubles. Hago software a la necesidad del cliente. The file name is usually passed in the constructor, but it can be set at any time using setFileName (). In our example, we write, update and read a QHash(our dictionary). A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. It's on you to instantiate an item before you read it. For instance, if you have a QFile and read from it directly using QFile. For example, a data stream that is written by a PC under Windows can be read by a Sun SPARC running Solaris. If you read the file back into an object the data will be the same. In a batch file try: for /f %%a in (file. By default, when reading numbers from a stream of text, QTextStream will automatically detect the number's base representation. A QFile may be used by itself or more conveniently with a QDataStream or QTextStream. - read and sends them to our web service. Write float arrays to a text file You are encouraged to solve this task according to the task description, using any language you may know. qt,qfile,qdatastream. The QIODevice class is the base class of I/O devices. Here "BE" is at offset BB in the file. Over 90 percent of questions asked here gets answered. If I really wanted the fastest possible way to read in a file, I would be using POSIX 2008. An I/O device represents a medium that one can read bytes from and/or write bytes to. Hello! I seem to be getting a 500 when I try to upload a new document. e what is the important function should I use in this issu). Second, the binary compatibility. Read byte array from text file: 10. QFile is an I/O device for reading and writing text and binary files and resources. OK, I Understand. The file name is usually passed in the constructor but can be changed with setName(). Watch the video tutorials about trading signals on YouTube Choose a signal you are interested in and subscribe to it in a few clicks. The file name is usually passed in the constructor, but it can be set at any time using setFileName (). In this sample serialized QGprahicsItem is created on the QGraphicsScene by reading related data from a text file. QBasic can deal with SDF and CSV files, and can read and write to files Randomly, Sequentialy or using byte positions. txt to file3. Actions Codegen Controls. QFile、QBuffer和QTcpSocket可支持读写设备,用open函数打开,用write或putChar函数写入。用read和readLine或readAll进行读取数据,最后用 close函数进行关闭设备。 1. Hello! I seem to be getting a 500 when I try to upload a new document. 4 options to generate primary keys The JPA specification supports 4 different primary key generation strategies which generate the primary key values programmatically or use database features, like auto-incremented columns or sequences. Output with QFile: 5. The Windows and Linux encoder binaries support 8-bit and 10-bit internal bit-depth and output. Networking and reading and writing XML are such substantial topics that we cover separately in their own dedicated chapters (Chapter 15 and Chapter 16). Both actions work in the same exact way, only the ReadBinary returns the entry file in a binary encoding while the Read action returns a string value. There are two main functions used to read and write binary files in C Programming i. By default, when reading numbers from a stream of text, QTextStream will automatically detect the number's base representation. Browse the source code of qtbase/tests/auto/corelib/io/qfile/tst_qfile. It directly provides unbuffered, binary disk input/output services, and it indirectly supports text files and memory files through its derived classes. If Qfile is given, then the solution will be output to the CGNS file, otherwise just the grid will be. - // The installer binary on OSX and Windows does not contain the binary + // The installer binary on macOS and Windows does not contain the binary // content, it's put into the resources folder as separate file. Basic SeismicHandler Introduction Sebastian Rost October 2006 SeismicHandler (SH) is a tool for analyzing digital seismograms. An I/O device represents a medium that one can read bytes from and/or write bytes to. Hago software a la necesidad del cliente. Using STL File I/O. The process of saving a game generally involves serializing each game object's member variables to a file. BE is 190, so I scroll forward to the last byte above and I know the next 190 bytes are my data. Started by digimonkey, 4th November 2014 08:16. Hago software a la necesidad del cliente. Hi, I'm trying to read a file as a binary, byte-by-byte, and strangely nothing seems to work with QFile. Read text file line by line: 9. Most resources helpfully point out that you can do this in C++. The file name is usually passed in the constructor, but it can be set at any time using setFileName (). QFile is an I/O device for reading and writing text and binary files and resources. \brief The QFile class provides an interface for reading from and writing to files. An I/O device represents a medium that one can read bytes from and/or write bytes to. When you use seek in such a file, QFile::pos() will always returns 0. By default OBDC uses the first row as names for the columns, you are supposed to be able to change this with the 'FirstRowHasNames' option in the connection settings, however there is a bug (see KB288343). That's why no browsers would allow it. I'm trying to learn C++ and I would interested in how I could write better code.