本文整理汇总了C#中Encoding.GetPreamble方法的典型用法代码示例。如果您正苦于以下问题：C# Encoding.GetPreamble方法的具体用法？C# Encoding.GetPreamble怎么用？C# Encoding.GetPreamble使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Encoding的用法示例。
在下文中一共展示了Encoding.GetPreamble方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: VerifyEncoding
public static void VerifyEncoding(Encoding encoding, int codePage, EncoderFallback encoderFallback, DecoderFallback decoderFallback)
{
if (encoderFallback == null)
{
Assert.NotNull(encoding.EncoderFallback);
Assert.Equal(codePage, encoding.EncoderFallback.GetHashCode());
}
else
{
Assert.Same(encoderFallback, encoding.EncoderFallback);
}
if (decoderFallback == null)
{
Assert.NotNull(encoding.DecoderFallback);
Assert.Equal(codePage, encoding.DecoderFallback.GetHashCode());
}
else
{
Assert.Same(decoderFallback, encoding.DecoderFallback);
}
Assert.Empty(encoding.GetPreamble());
Assert.False(encoding.IsSingleByte);
}示例2: ValidateConsoleEncoding
public static unsafe void ValidateConsoleEncoding(Encoding encoding)
{
Assert.NotNull(encoding);
// The primary purpose of ConsoleEncoding is to return an empty preamble.
Assert.Equal(Array.Empty<byte>(), encoding.GetPreamble());
// There's not much validation we can do, but we can at least invoke members
// to ensure they don't throw exceptions as they delegate to the underlying
// encoding wrapped by ConsoleEncoding.
Assert.False(string.IsNullOrWhiteSpace(encoding.EncodingName));
Assert.False(string.IsNullOrWhiteSpace(encoding.WebName));
Assert.True(encoding.CodePage >= 0);
bool ignored = encoding.IsSingleByte;
// And we can validate that the encoding is self-consistent by roundtripping
// data between chars and bytes.
string str = "This is the input string.";
char[] strAsChars = str.ToCharArray();
byte[] strAsBytes = encoding.GetBytes(str);
Assert.Equal(strAsBytes.Length, encoding.GetByteCount(str));
Assert.True(encoding.GetMaxByteCount(str.Length) >= strAsBytes.Length);
Assert.Equal(str, encoding.GetString(strAsBytes));
Assert.Equal(str, encoding.GetString(strAsBytes, 0, strAsBytes.Length));
Assert.Equal(str, new string(encoding.GetChars(strAsBytes)));
Assert.Equal(str, new string(encoding.GetChars(strAsBytes, 0, strAsBytes.Length)));
fixed (byte* bytesPtr = strAsBytes)
{
char[] outputArr = new char[encoding.GetMaxCharCount(strAsBytes.Length)];
int len = encoding.GetChars(strAsBytes, 0, strAsBytes.Length, outputArr, 0);
Assert.Equal(str, new string(outputArr, 0, len));
Assert.Equal(len, encoding.GetCharCount(strAsBytes));
Assert.Equal(len, encoding.GetCharCount(strAsBytes, 0, strAsBytes.Length));
fixed (char* charsPtr = outputArr)
{
len = encoding.GetChars(bytesPtr, strAsBytes.Length, charsPtr, outputArr.Length);
Assert.Equal(str, new string(charsPtr, 0, len));
Assert.Equal(len, encoding.GetCharCount(bytesPtr, strAsBytes.Length));
}
Assert.Equal(str, encoding.GetString(bytesPtr, strAsBytes.Length));
}
Assert.Equal(strAsBytes, encoding.GetBytes(strAsChars));
Assert.Equal(strAsBytes, encoding.GetBytes(strAsChars, 0, strAsChars.Length));
Assert.Equal(strAsBytes.Length, encoding.GetByteCount(strAsChars));
Assert.Equal(strAsBytes.Length, encoding.GetByteCount(strAsChars, 0, strAsChars.Length));
fixed (char* charsPtr = strAsChars)
{
Assert.Equal(strAsBytes.Length, encoding.GetByteCount(charsPtr, strAsChars.Length));
byte[] outputArr = new byte[encoding.GetMaxByteCount(strAsChars.Length)];
Assert.Equal(strAsBytes.Length, encoding.GetBytes(strAsChars, 0, strAsChars.Length, outputArr, 0));
fixed (byte* bytesPtr = outputArr)
{
Assert.Equal(strAsBytes.Length, encoding.GetBytes(charsPtr, strAsChars.Length, bytesPtr, outputArr.Length));
}
Assert.Equal(strAsBytes.Length, encoding.GetBytes(str, 0, str.Length, outputArr, 0));
}
}示例3: GetPreamble
public void GetPreamble(Encoding encoding)
{
Assert.Empty(encoding.GetPreamble());
}