NET Framework applications or Windows 8.
They can store structured information, as in comma-separated values CSV files or XML documents, or unstructured information such as plain text created with the Notepad utility. Although they do not provide the functionality of a database, they are still very useful.
One common use is to allow interoperability between applications, particularly when interacting with legacy systems. The class allows character data to be sent to a stream, including a text file, for recording or processing.
The character data can be sent with various standardised encoding options such as UTF, Unicode, etc. Creating a Text File In this article we will write the code required to create and populate a new text file and to append information to a pre-existing document.
If you wish to follow the examples, create a new console application. To simplify the references to the StreamWriter class, add the following using directive to the Program class.
The most basic constructor for StreamWriter accepts a single parameter containing the path of the file to work with. If the file does not exist, it will be created.
If it does exist, the old file will be overwritten. To create the StreamWriter, add the following line of code to the Main method of the program. If the filename specified already exists on your system, change the string parameter to another path so that you do not risk losing important information.
The path can be file path, a UNC network share or another location that can accept information from a stream. This includes target locations that do not store the data on disk.
The WriteLine method stores an entire line of characters, ending with a carriage return in readiness for a new line. The simplest variation requires a string parameter containing the characters to be written.
WriteLine "Line 1" ; If you do not wish to end the line, you can use the Write method. This method is almost identical to WriteLine, except that it does not append the carriage return.C# I have a console app that reads and writes a get/set list of "Person" details.
It works correctly up until I try to write it to a text file as well. Can somebody tell me why this writes the last line of "Person" details into my text file instead of the whole list?
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- This is not the best way to create and write to a file - I'd rather create the text I want to write and then just write it to a new file, but given your code, all that is missing is having to close the created file before writing to it.
It works correctly up until I try to write it to a text file as well. Can somebody tell me why this writes the last line of "Person" details into my text file instead of the whole list? Reading and Writing to Files and Streams.
As programmers, we often have to write directly to a file or data stream. If you've communicated with disparate systems, you are undoubtedly familiar with writing out CSV or XML files as a means of exchanging data.
I assume you are executing all of the above code each time you write something to the file. Each time the stream for the file is opened, its seek pointer is positioned at the beginning so all writes end up overwriting what was there before.