I have a file which has text with windows-1252 encoding. How to convert it into UTF8 file format?
The Encoding class supports conversions.
byte[] asciiBytes = File.ReadAllBytes("C:\\ascii.txt");
Encoding ASCII_1252 = Encoding.GetEncoding("windows-1252");
byte[] utf8Bytes = Encoding.Convert(ASCII_1252, Encoding.UTF8, asciiBytes);
File.WriteAllBytes("C:\\utf8.txt", utf8Bytes);
Note that GetEncoding() relies on the underlying platform to support most code pages as explained here: http://msdn.microsoft.com/en-us/library/t9a3kf7c(v=vs.100).aspx
Related
I have a csv file which contains latin characters (Ascii value > 127). The file gets uploaded with any type of encoding and shows the right data after uploading. But it gets converted automatically to UTF8 after performing operations on the file.
But I am not able to see the same characters when it is converted to UTF8 after performing operations.
I believe if I will upload the files with UTF8 encoding only then I will see the same characters that were present while uploading the file. So I want to encode the file with UTF8 Encoding.
I am getting IForm File from the function. I tried these methods to change the encoding but it does not affect the file in any way.
First method
//'file' is the IForm file
string[] filecontent;
StreamReader sr = new StreamReader(file.FileName);
string data = sr.ReadLine();
filecontent = data.Split(",");
File.WriteAllLines(file.FileName, filecontent, Encoding.UTF8);
Second method
var fileStream2 = File.OpenWrite(file.FileName);
var sw = new StreamWriter(fileStream2, Encoding.UTF8, 1024, false);
sw.Write(fileStream2);
sw.Close();
Is there any other method to do this or is there any other library to encode the csv file with UTF 8 directly?
I've been trying this for quite a while now, but can't figure it out. I'm trying to export data to Excel via a *.csv file. It works great so far, but I have some encoding problems when opening the files in Excel.
(original string on the left, EXCEL result on the right):
Messwert(µm / m) ==> Messwert(µm / m)
Dümme Mässöng ==> Dümme Mässöng
Notepad++ tells me that the file is encoded "ANSI as UTF8"(WTF?)
So here are different ways I tried to get a valid result:
obvious implementation:
tWriter.Write(";Messwert(µm /m)");
more sophisticated one (tried probably a dozen or more encoding combinations:)
tWriter.Write(Encoding.Default.GetString(Encoding.Unicode.GetBytes(";Messwert(µm /m)")));
tWriter.Write(Encoding.ASCII.GetString(Encoding.Unicode.GetBytes(";Messwert(µm /m)")));
and so on
Whole source code for the method creating the data:
MemoryStream tStream = new MemoryStream();
StreamWriter tWriter = new StreamWriter(tStream);
tWriter.Write("\uFEFF");
tWriter.WriteLine(string.Format("{0}", aMeasurement.Name));
tWriter.WriteLine(aMeasurement.Comment);
tWriter.WriteLine();
tWriter.WriteLine("Zeit in Minuten;Messwert(µm / m)");
TimeSpan tSpan;
foreach (IMeasuringPoint tPoint in aMeasurement)
{
tSpan = new TimeSpan(tPoint.Time - aMeasurement[0].Time);
tWriter.WriteLine(string.Format("{0};{1};", (int)tSpan.TotalMinutes, getMPString(tPoint)));
}
tWriter.Flush();
return tStream;
Generated CSV file:
Dümme Mössäng
Testmessung die erste
Zeit in Minuten;Messwert(µm / m)
0;-703;
0;-381;
1;1039;
1;1045;
2;1457;
2;1045;
This worked perfect for me:
private const int WIN_1252_CP = 1252; // Windows ANSI codepage 1252
this._writer = new StreamWriter(fileName, false, Encoding.GetEncoding(WIN_1252_CP));
CSV encoding issues (Microsoft Excel)
try the following:
using (var sw = File.Create(Path.Combine(txtPath.Text, "UTF8.csv")))
{
var preamble = Encoding.UTF8.GetPreamble();
sw.Write(preamble, 0, preamble.Length);
var data = Encoding.UTF8.GetBytes("懘荧,\"Hello\",text");
sw.Write(data, 0, data.Length);
}
It writes the proper UTF8 preamble to the file before writing the UTF8 encoded CSV.
This solution is written up as a fix for a Java application however you should be able to do something similar in C#. You may also want to look at the documentation on the StreamWriter class, in the remarks it refers to the Byte Order Mark (BOM).
"ANSI as UTF8"(WTF?)
NotePad++ is probably correct. The encoding is UTF8 (i.e., correct Unicode header), but only contains ANSI data (i.e., é is not encoded in correct UTF8 way, which would mean two bytes).
Or: it is the other way around. It is ANSI (no file header BOM), but the encoding of the individual characters is, or looks like, UTF8. This would explain the ü and other characters expanding in more than one other character. You can fix this by forcing the file to be read as Unicode.
If it's possible to post (part of) your CSV, we may be able to help fixing it at the source.
Edit
Now that we've seen your code: can you remove the StreamWriter and replace it with a TextWriter? Also, remove the hand-encoding of the BOM, it is not necessary. When you create a TextWriter, you can specify the encoding (don't use ASCII, try UTF8).
Trevor Germain's helped me to save in the correct encoded format
using (var sw = File.Create(Path.Combine(txtPath.Text, "UTF8.csv")))
{
var preamble = Encoding.UTF8.GetPreamble();
sw.Write(preamble, 0, preamble.Length);
var data = Encoding.UTF8.GetBytes("懘荧,\"Hello\",text");
sw.Write(data, 0, data.Length);
}
I'd suggest you open up the text file in a hex editor, and see what it really is. The BOM for UTF-16 is 0xFEFF, which the writing code is apparently writing to the stream - but the rest of the writing doesn't specify an encoding to use - it would use the default encoding of the StreamWriter, which is UTF-8. There appears to be a mix up of encodings.
When you pop open the file in hex view, if you see lots of 0x00 between the characters, you're working with UTF-16, which is Encoding.Unicode in C#. If there are no 0x00 between chars, the encoding is probably UTF-8.
If the latter case, just fix up the BOM to be EF BB BF rather than FE FF, and read normally with UTF-8 encoding.
For my scenario using StreamWriter I found explicitly passing UTF8 encoding to the StreamWriter enabled excel to read the file using the correct encoding.
See this answer for more details:
https://stackoverflow.com/a/22306937/999048
How I can convert cp1252 string to utf-8 string in c#?
I tried this code, but it doesn't work:
Encoding wind1252 = Encoding.GetEncoding(1252);
Encoding utf8 = Encoding.GetEncoding(1251);
byte[] wind1252Bytes = ReadFile(myString1252);
byte[] utf8Bytes = Encoding.Convert(wind1252, utf8, wind1252Bytes);
string myStringUtf8 = Encoding.UTF8.GetString(utf8Bytes);
var myGoodString = System.IO.File.ReadAllText(
#"C:\path\to\file.txt",
Encoding.GetEncoding("Windows-1252")
);
A .NET/CLR string in memory cannot be UTF-8. It is just Unicode, or UTF-16 if you like.
The above code will properly read a text file in CP1252 into a .NET string.
If you insist on going through a byte[] wind1252Bytes, it is simply:
var myGoodString = Encoding.GetEncoding("Windows-1252").GetString(wind1252Bytes);
Since this answer was written, new versions of the framework .NET have appeared which do not by default recognize all the old (legacy) Windows-specific code pages. If Encoding.GetEncoding("Windows-1252") throws an exception with your runtime version, try registrering an additional provider with
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
(may need additional assembly reference to System.Text.Encoding.CodePages.dll) before you use Encoding.GetEncoding("Windows-1252").
See CodePagesEncodingProvider class documentation.
I need to convert file encoding from the default windows encoding to another specific encoding like "IBM864", and then save the file in the new encoding.
please any one can help me.
Read the input file:
string content = File.ReadAllText(inputFilePath);
Write the content with the specified encoding:
Encoding enc = Encoding.GetEncoding(864); //864 is the codepage for IBM864-Arabic (864)
File.WriteAllText(outputFilePath,content,enc);
I've been trying this for quite a while now, but can't figure it out. I'm trying to export data to Excel via a *.csv file. It works great so far, but I have some encoding problems when opening the files in Excel.
(original string on the left, EXCEL result on the right):
Messwert(µm / m) ==> Messwert(µm / m)
Dümme Mässöng ==> Dümme Mässöng
Notepad++ tells me that the file is encoded "ANSI as UTF8"(WTF?)
So here are different ways I tried to get a valid result:
obvious implementation:
tWriter.Write(";Messwert(µm /m)");
more sophisticated one (tried probably a dozen or more encoding combinations:)
tWriter.Write(Encoding.Default.GetString(Encoding.Unicode.GetBytes(";Messwert(µm /m)")));
tWriter.Write(Encoding.ASCII.GetString(Encoding.Unicode.GetBytes(";Messwert(µm /m)")));
and so on
Whole source code for the method creating the data:
MemoryStream tStream = new MemoryStream();
StreamWriter tWriter = new StreamWriter(tStream);
tWriter.Write("\uFEFF");
tWriter.WriteLine(string.Format("{0}", aMeasurement.Name));
tWriter.WriteLine(aMeasurement.Comment);
tWriter.WriteLine();
tWriter.WriteLine("Zeit in Minuten;Messwert(µm / m)");
TimeSpan tSpan;
foreach (IMeasuringPoint tPoint in aMeasurement)
{
tSpan = new TimeSpan(tPoint.Time - aMeasurement[0].Time);
tWriter.WriteLine(string.Format("{0};{1};", (int)tSpan.TotalMinutes, getMPString(tPoint)));
}
tWriter.Flush();
return tStream;
Generated CSV file:
Dümme Mössäng
Testmessung die erste
Zeit in Minuten;Messwert(µm / m)
0;-703;
0;-381;
1;1039;
1;1045;
2;1457;
2;1045;
This worked perfect for me:
private const int WIN_1252_CP = 1252; // Windows ANSI codepage 1252
this._writer = new StreamWriter(fileName, false, Encoding.GetEncoding(WIN_1252_CP));
CSV encoding issues (Microsoft Excel)
try the following:
using (var sw = File.Create(Path.Combine(txtPath.Text, "UTF8.csv")))
{
var preamble = Encoding.UTF8.GetPreamble();
sw.Write(preamble, 0, preamble.Length);
var data = Encoding.UTF8.GetBytes("懘荧,\"Hello\",text");
sw.Write(data, 0, data.Length);
}
It writes the proper UTF8 preamble to the file before writing the UTF8 encoded CSV.
This solution is written up as a fix for a Java application however you should be able to do something similar in C#. You may also want to look at the documentation on the StreamWriter class, in the remarks it refers to the Byte Order Mark (BOM).
"ANSI as UTF8"(WTF?)
NotePad++ is probably correct. The encoding is UTF8 (i.e., correct Unicode header), but only contains ANSI data (i.e., é is not encoded in correct UTF8 way, which would mean two bytes).
Or: it is the other way around. It is ANSI (no file header BOM), but the encoding of the individual characters is, or looks like, UTF8. This would explain the ü and other characters expanding in more than one other character. You can fix this by forcing the file to be read as Unicode.
If it's possible to post (part of) your CSV, we may be able to help fixing it at the source.
Edit
Now that we've seen your code: can you remove the StreamWriter and replace it with a TextWriter? Also, remove the hand-encoding of the BOM, it is not necessary. When you create a TextWriter, you can specify the encoding (don't use ASCII, try UTF8).
Trevor Germain's helped me to save in the correct encoded format
using (var sw = File.Create(Path.Combine(txtPath.Text, "UTF8.csv")))
{
var preamble = Encoding.UTF8.GetPreamble();
sw.Write(preamble, 0, preamble.Length);
var data = Encoding.UTF8.GetBytes("懘荧,\"Hello\",text");
sw.Write(data, 0, data.Length);
}
I'd suggest you open up the text file in a hex editor, and see what it really is. The BOM for UTF-16 is 0xFEFF, which the writing code is apparently writing to the stream - but the rest of the writing doesn't specify an encoding to use - it would use the default encoding of the StreamWriter, which is UTF-8. There appears to be a mix up of encodings.
When you pop open the file in hex view, if you see lots of 0x00 between the characters, you're working with UTF-16, which is Encoding.Unicode in C#. If there are no 0x00 between chars, the encoding is probably UTF-8.
If the latter case, just fix up the BOM to be EF BB BF rather than FE FF, and read normally with UTF-8 encoding.
For my scenario using StreamWriter I found explicitly passing UTF8 encoding to the StreamWriter enabled excel to read the file using the correct encoding.
See this answer for more details:
https://stackoverflow.com/a/22306937/999048