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Questions tagged [textreader]

68 questions
146
votes
6 answers

In C#, how can I create a TextReader object from a string (without writing to disk)

I'm using A Fast CSV Reader to parse some pasted text into a webpage. The Fast CSV reader requires a TextReader object, and all I have is a string. What's the best way to convert a string into a TextReader object on the fly? Thanks! Update- Sample…
Hairgami_Master
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5 answers

Sharing violation IOException while reading and writing to file C#

Here is my code: public static TextWriter twLog = null; private int fileNo = 1; private string line = null; TextReader tr = new StreamReader("file_no.txt"); TextWriter tw = new StreamWriter("file_no.txt"); line = tr.ReadLine(); if(line != null){ …
Ozg
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3 answers

How to loop over lines from a TextReader?

How do I loop over lines from a TextReader source? I tried foreach (var line in source) But got the error foreach statement cannot operate on variables of type 'System.IO.TextReader' because 'System.IO.TextReader' does not contain a public…
Colonel Panic
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1 answer

Why does IEumerator affect the state of IEnumerable even the enumerator never reached the end?

I am curious why the following throws an error message (text reader closed exception) on the "last" assignment: IEnumerable textRows = File.ReadLines(sourceTextFileName); IEnumerator textEnumerator =…
Matt
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4 answers

TextReader.Peek behaviour and detecting end of stream/reader

When I'm using a Text reader what is the best way to detect that I am actually at the end of my data? The usual way to do this is something like the following, while(reader.Peek() != -1) { ///do stuff } However the msdn…
Colin Bull
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7
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What is the difference between Read() and ReadBlock() calls on TextReader?

The title more or less says it all. The calls are documented: Here for TextReader.Read Method (Char[], Int32, Int32) and Here for TextReader.ReadBlock() with the same argument types. I want to extract a portion of a byte array, for which I make up…
Marcel
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2 answers

How to open a StreamReader in ShareDenyWrite mode?

How do i open a StreamReader with FILE_SHARE_READ, FILE_SHARE_WRITE, FILE_SHARE_DELETE? Same question, slightly expanded How do i open a StreamReader so that i can read an encoded text file, with sharing options so that another process can read the…
Ian Boyd
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5
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3 answers

C#. How come when I use TextReader.Read() it returns an int value? Possible to convert to char?

So TextReader.ReadLine() returns a string, but TextReader.Read() returns an int value. This int value also seems to be in some sort of format that I don't recognize. Is it possible to convert this integer to a character? Thanks for any…
Alexander
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1 answer

How to string multiple TextReaders together?

I have 3 TextReaders -- a combination of StreamReaders and StringReaders. Conceptually, the concatenation of them is a single text document. I want to call a method (not under my control) that takes a single TextReader. Is there any built-in or…
Ken
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5
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2 answers

How can I easily get a TextReader from an XDocument?

Given an XDocument instance, how can I easily get a TextReader that represents that instance? The best I've been able to come up with is something like this (where xml is an XDocument instance): var s = new MemoryStream(); var sw = new…
Mark Seemann
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4
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IFilter Textreader not working within IIS/ASP.NET?

I need to extract text from DOC, DOCX and PDF files. I've downloaded two Windows Forms Application demo projects, one here: http://www.codeproject.com/Articles/31944/Implementing-a-TextReader-to-extract-various-files the other…
Cees
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4
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1 answer

C# Memory to TextReader

What is optimal way to get TextReader instance from a Memory object? I could write something like: using (var stream = new MemoryStream(body.ToArray())) using (var reader = new StreamReader(stream)) { } but maybe there is a better way?
obratim
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Using TextReader to read bytes

In the past, I have been using a BinaryReader to read a few bytes, but recently, I have gotten this error: An error has occurred: Probable I/O race condition detected while copying memory. The I/O package is not thread safe by default. In…
user1914728
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6 answers

Issues using StreamReader.EndOfStream?

So I'm doing a project where I am reading in a config file. The config file is just a list of string like "D 1 1", "C 2 2", etc. Now I haven't ever done a read/write in C# so I looked it up online expecting to find some sort of rendition of C/C++…
MattMacdonald
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2 answers

Java Text Input: How to ignore lines starting with certain characters in them?

I basically want to ignore certain lines with characters in them, like if there's a line // hello, i'm bill I want to ignore that line while reading it because it contains the character "//". How can I do that? I tried method skip(), but it gives…
lrvilnius
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