To use a specific encoding when working with XDocument, you can create an XDeclaration.
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XDocument xDoc = new XDocument(); xDoc.Declaration = new XDeclaration("1.0", "ISO-8859-1", ""); |
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Dim xDoc As New XDocument() xDoc.Declaration = New XDeclaration("1.0", "ISO-8859-1", "") |
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To change the encoding of a String using .NET you can use this Extension Method which is part of the Fesslersoft.Extensions. This method needs a source and a target encoding. Some people might find the source encoding parameter needless, but as Joel stated in his excellent blogpost
“It does not make sense to have a string without knowing what encoding it uses” (Joel Spolsky)
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public static string ChangeEncoding(this string input, Encoding sourceEncoding, Encoding targetEncoding) { byte[] utfBytes = sourceEncoding.GetBytes(input); byte[] isoBytes = Encoding.Convert(sourceEncoding, targetEncoding, utfBytes); return targetEncoding.GetString(isoBytes); } |
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<System.Runtime.CompilerServices.Extension> _ Public Shared Function ChangeEncoding(input As String, sourceEncoding As Encoding, targetEncoding As Encoding) As String Dim utfBytes As Byte() = sourceEncoding.GetBytes(input) Dim isoBytes As Byte() = Encoding.Convert(sourceEncoding, targetEncoding, utfBytes) Return targetEncoding.GetString(isoBytes) End Function |
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There are various methods to remove unicode characters from a String in .NET.
Below i will show you some methods and the benchmark results.
Before choosing a method, take a look at the Benchmark result and the Framework Compatibility.
A for Loop removed 100 000 times the unicode characters of the string value
ᾭHeὣlݬl♫oѪ₪ Wor♀ld. This has been repeated 40 Times for each method. All Methods returned the right result Hello World.
| Method | Average runtime (ms) |
| Regex | 2 433 204 |
| Regex (compiled) | 1 646 337 |
| String Normalization | 1 016 305 |
| Encodings | 2 183 387 |
| LINQ | 492 708 |
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public static String StripUnicodeCharactersFromString(string inputValue) { return Regex.Replace(inputValue, @"[^\u0000-\u007F]", String.Empty); } |
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Private Function ConvertToASCIIUsingRegex(inputValue As String) As String Return Regex.Replace(inputValue, "[^\u0000-\u007F]", String.Empty) End Function |
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private static Regex _compiledUnicodeRegex = new Regex(@"[^\u0000-\u007F]", RegexOptions.Compiled); public static String StripUnicodeCharactersFromString(string inputValue) { return _compiledUnicodeRegex.Replace(inputValue, String.Empty); } |
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Private _compiledUnicodeRegex As New Regex("[^\u0000-\u007F]", RegexOptions.Compiled) Public Function StripUnicodeCharactersFromString(inputValue As String) As [String] Return _compiledUnicodeRegex.Replace(inputValue, [String].Empty) End Function |
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public static String StripUnicodeCharactersFromString(string inputValue) { StringBuilder newStringBuilder = new StringBuilder(); newStringBuilder.Append(inputValue.Normalize(NormalizationForm.FormKD).Where(x => x < 128).ToArray()); return newStringBuilder.ToString(); } |
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Public Function StripUnicodeCharactersFromString(inputValue As String) As [String] Dim newStringBuilder As New StringBuilder() newStringBuilder.Append(inputValue.Normalize(NormalizationForm.FormKD).Where(Function(x) Convert.ToInt32(x) < 128).ToArray()) Return newStringBuilder.ToString() End Function |
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public static String StripUnicodeCharactersFromString(string inputValue) { return Encoding.ASCII.GetString(Encoding.Convert(Encoding.UTF8, Encoding.GetEncoding(Encoding.ASCII.EncodingName, new EncoderReplacementFallback(String.Empty), new DecoderExceptionFallback()), Encoding.UTF8.GetBytes(inputValue))); } |
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Public Function StripUnicodeCharactersFromString(inputValue As String) As [String] Return Encoding.ASCII.GetString(Encoding.Convert(Encoding.UTF8, Encoding.GetEncoding(Encoding.ASCII.EncodingName, New EncoderReplacementFallback([String].Empty), New DecoderExceptionFallback()), Encoding.UTF8.GetBytes(inputValue))) End Function |
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public static String StripUnicodeCharactersFromString(string inputValue) { return new string(inputValue.Where(c => c <= sbyte.MaxValue).ToArray()); } |
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Public Function StripUnicodeCharactersFromString(inputValue As String) As [String] Return New String(inputValue.Where(Function(c) Convert.ToInt32(c) <= SByte.MaxValue).ToArray()) End Function |
Do you have an alternate or faster method for removing unicode?
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