streamwriter | 易学教程

NodeJS write binary buffer into a file

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问题 I can't rewrite a file that I am getting from a binary buffer, I have checked with the original file and all bytes are the same. This is the file create from NodeJS: # hd test.txt | head 00000000 47 49 46 38 39 61 32 00 32 00 f7 00 00 96 8c 73 |GIF89a2.2.�....s| 00000010 66 5e 45 c6 bb 9f 7b 72 5a 47 47 47 8a 81 65 ca |f^Eƻ.{rZGGG..e�| 00000020 c1 a6 c9 c1 ac ee ea dd c8 c5 bc 8c 87 7a d3 c9 |��ż..z��| 00000030 ab 43 3b 26 eb e5 d1 fa fa fa e5 e4 e2 a6 9d 83 |�C;&��..| 00000040

how to use StreamWriter class properly?

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问题 I am using StreamWriter class for file operations, are there any problems in this code that I am not seeing? Such as do I need to put it into a try catch finally block? StreamWriter sr = new StreamWriter(streamFolder); sr.Write(details); File.SetAttributes(streamFolder, FileAttributes.Hidden); sr.Close(); 回答1: Whats wrong with your code? If some exception will occur before you close stream, then stream will stay open, and system resources will not be released: StreamWriter sr = new

how to read special character like é, â and others in C#

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问题 I can't read those special characters I tried like this 1st way # string xmlFile = File.ReadAllText(fileName); 2nd way # FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); StreamReader r = new StreamReader(fs); string s = r.ReadToEnd(); But both statements don't understand those special characters. How should I read? UPDATE ### I also try all encoding with string xmlFile = File.ReadAllText(fileName, Encoding. ); but still don't understand those special characters. 回答1:

Add a new line at a specific position in a text file.

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问题 I am trying to add a specific line of text in a file. Specifically between two boundaries. An example of what it would look like if I wanted to add a line in between the boundaries of item1: [item1] 2550 coins 995 200000 7 2550 coins 995 200000 7 2550 coins 995 200000 7 2550 coins 995 200000 7 2550 coins 995 200000 7 //Add a line here in between the specific boundaries [/item1] [item2] 2550 coins 995 200000 7 2550 coins 995 200000 7 2550 coins 995 200000 8 2550 coins 995 200000 7 2550 coins

Adding a Line to the Middle of a File with .NET

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问题 Hello I am working on something, and I need to be able to be able to add text into a .txt file. Although I have this completed I have a small problem. I need to write the string in the middle of the file more or less. Example: Hello my name is Brandon, I hope someone can help, //I want the string under this line. Thank you. Hopefully someone can help with a solution. Edit Alright thanks guys, I'll try to figure it out, probably going to just rewrite the whole file. Ok well the program I am

Should I call Close() or Dispose() for stream objects?

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Classes such as Stream , StreamReader , StreamWriter etc implements IDisposable interface. That means, we can call Dispose() method on objects of these classes. They've also defined a public method called Close() . Now that confuses me, as to what should I call once I'm done with objects? What if I call both? My current code is this: using (Stream responseStream = response.GetResponseStream()) { using (StreamReader reader = new StreamReader(responseStream)) { using (StreamWriter writer = new StreamWriter(filename)) { int chunkSize = 1024; while (!reader.EndOfStream) { char[] buffer = new char

Writing file to web server - ASP.NET

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问题 I simply want to write the contents of a TextBox control to a file in the root of the web server directory... how do I specify it? Bear in mind, I\'m testing this locally... it keeps writing the file to my program files\\visual studio\\Common\\IDE directory rather than my project directory (which is where I assume root is when the web server fires off). Does my problem have something to do with specifying the right location in my web.config? I tried that and still no go... Thanks much...

simultaneous read-write a file in C#

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问题 I have a file containing data that I\'d like to monitor changes to, as well as add changes of my own. Think like \"Tail -f foo.txt\". Based on this thread, it looks like I should just create a filestream, and pass it both to a writer and reader. However, when the reader reaches the end of the original file, it fails to see updates I write myself. I know it seems like a weird situation... its more an experiment to see if it can be done. Here is the example case I tried: foo.txt: a b c d e f

Should I call Close() or Dispose() for stream objects?

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问题 Classes such as Stream , StreamReader , StreamWriter etc implements IDisposable interface. That means, we can call Dispose() method on objects of these classes. They\'ve also defined a public method called Close() . Now that confuses me, as to what should I call once I\'m done with objects? What if I call both? My current code is this: using (Stream responseStream = response.GetResponseStream()) { using (StreamReader reader = new StreamReader(responseStream)) { using (StreamWriter writer =

Append lines to a file using a StreamWriter

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问题 I want to append lines to my file. I am using a StreamWriter: StreamWriter file2 = new StreamWriter(@\"c:\\file.txt\"); file2.WriteLine(someString); file2.Close(); The output of my file should be several strings below each other, but I have only one row, which is overwritten every time I run this code. Is there some way to let the StreamWriter append to an existing file? 回答1: Use this instead: new StreamWriter("c:\\file.txt", true); With this overload of the StreamWriter constructor you