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问题 C# code: public ActionResult GetDoucmentImage(long onBaseDocumentId) { onBaseDocumentId = 1111; OnBaseDataAccess db = new OnBaseDataAccess(); OnBaseDocument document = db.GetDocument(onBaseDocumentId); return View("GetDoucmentImage", document); } View Code: @{ var base64 = Convert.ToBase64String(Model.Data); var imgSrc = String.Format("data:image/png;base64,{0}", base64);} <img src="@imgSrc" style="width:200px; height:400px;"/> Trying to show an image in browser, it works in IE but not in

问题 I am trying to display sensor data on my Android phone (target 4.3) received from a transmitting arduino type device. The transmission takes place via Bluetooth. I am able to connect to the arduino type device and even share data, however for some reason I am having synchronization issues. The way the arduino is setup right now, after a successful connection it waits for a byte to be received from my phone (unsigned byte value 255), when it receives this byte it responds by sending a packet

问题 Since two days I try to manage my images in a WPF application but I have errors and errors errors, ... The image is show in a System.Windows.Control.Image. For this reason I try to work with variable BitMapImage. Now I have the error : "Impossible to access close stream" and I can not find a solution. I have created two function for convert : public static BitmapImage ConvertToBitMapImage(byte[] bytes) { if (bytes == null || bytes.Length == 0) return null; var image = new BitmapImage(); using

问题 i would like to know how to save an image into database. I know that we have to convert the image into a byte first and then save it in the database. I have set the data type to byte in the database. I need example projects or code samples on how to go about doing this in visual studios 2010 C#. Thank You 回答1: if you want find your image FileInfo fInfo = new FileInfo(yourPath); long numBytes = fInfo.Length; FileStream fStream = new FileStream(sPath, FileMode.Open, FileAccess.Read);

问题 My question is: If I got it right from the Java disassembly, when I use byte a=3,b=5; System.out.println(a+b); would actually use int instead of byte. Also all local memory slots are 4B just as stack slots. I realize that allocating a byte array would probably act more efficiently, but is it true that using a single byte value is ultimately inefficient? (The same point for short) 回答1: The first rule of performance tuning should be to write simple, clear code. In this example, there is no

问题 I am looking for some ways to advance pointers to the beginning of files in compressed archives. I have a character pointer to the beginning of the file that has been read into memory. The archive directory contains the offsets of each file. Is it legal/recommended to say: char* beginning; //Imagine this is assigned to the beginning of the file in memory int file1OffsetBytes = 1000; // Imagine the first file is 1000 bytes into the file char* file1 = beginning + file1OffsetBytes; Is this a bad

问题 I would like to send hex commands to my device because it can only understand hex . Because of that I manage to create a function that can validate if the users input which is a string has a valid corresponding hex . The question is here. So, by validating if the users input has a corresponding hex equivalent I am confident that what my system sends will be read by my device. By searching I realized that it needs to be converted to bytes, it states Use the ASCIIEncoding class to convtert

问题 I have code like this to convert hex into byte string (define (word->bin s) (let ((n (string->number s))) (bytes (bitwise-and (arithmetic-shift n -24) #xFF) (bitwise-and (arithmetic-shift n -16) #xFF) (bitwise-and (arithmetic-shift n -8) #xFF) (bitwise-and n #xFF)))) (word->bin "#x10000002") I'm thinking of a similar function to convert binary into integers, then print it. The end result is the binary translated to hex. Some helpful links: http://download.plt-scheme.org/doc/372/html/mzscheme

问题 Is it possible to create a method like BitConverter.GetBytes() that accepts as input also a parameter of type Object , without using Marshaling as done here? Or the only solution, if a type Object is given as input, is to implement a case on all available .NET value types ? 回答1: No it isn't. The internal layout of a class or struct is undiscoverable. Marshaling is required, guided by a [StructLayout], to convert that undocumented layout to a known one. The JIT compiler readily takes advantage

问题 I need to do some (new to me) int/hex/byte work and I am struggling to get it right. The tcp server on the other side is expecting Little Endian. I need to send a byte array consisting of HEX values. 6000 needs to be sent as: 0x70, 0x17 19 needs to be sent as: 0x13, 0x00, 0x00, 0x00 The resulting byte array should look like this. **FROM THE MANUFACTURER** Complete message should be: 0x70, 0x17, 0x13, 0x00, 0x00, 0x00, 0x40, 0x42, 0x0f, 0x00, 0xA0, 0x86, 0x01, 0x00, 0x04, 0x01, 0x02, 0x03,