如何获取给定ascii值的字符

Question

如何获取给定ascii代码的ascii字符.

例如,我正在寻找一种方法,给出代码65将返回"A".

谢谢

Answer 1

你的意思是"A"(a string)还是"A"(a char)？

int unicode = 65;
char character = (char) unicode;
string text = character.ToString();

请注意,我已经将Unicode而不是ASCII称为C#的本机字符编码; 基本上每个char都是UTF-16代码点.

Answer 2

 string c = Char.ConvertFromUtf32(65);

c将包含"A"

Answer 3

这适用于我的代码.

string asciichar = (Convert.ToChar(65)).ToString();

返回: asciichar = 'A';

Answer 4

有几种方法可以做到这一点。

使用char struct（以字符串形式再次返回）

string _stringOfA = char.ConvertFromUtf32(65);

int _asciiOfA = char.ConvertToUtf32("A", 0);

简单地转换值（显示的字符和字符串）

char _charA = (char)65;

string _stringA = ((char)65).ToString();

使用ASCIIEncoding。
可以在循环中使用它来完成整个字节数组

var _bytearray = new byte[] { 65 };

ASCIIEncoding _asiiencode = new ASCIIEncoding();

string _alpha = _asiiencode .GetString(_newByte, 0, 1);

您可以重写类型转换器类，这将使您可以对值进行一些精美的验证：

var _converter = new ASCIIConverter();

string _stringA = (string)_converter.ConvertFrom(65);

int _intOfA = (int)_converter.ConvertTo("A", typeof(int));

这是课程：

public class ASCIIConverter : TypeConverter
{
    // Overrides the CanConvertFrom method of TypeConverter.
    // The ITypeDescriptorContext interface provides the context for the
    // conversion. Typically, this interface is used at design time to 
    // provide information about the design-time container.
    public override bool CanConvertFrom(ITypeDescriptorContext context,
       Type sourceType)
    {
        if (sourceType == typeof(string))
        {
            return true;
        }
        return base.CanConvertFrom(context, sourceType);
    }

    public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
    {
        if (destinationType == typeof(int))
        {
            return true;
        }
        return base.CanConvertTo(context, destinationType);
    }


    // Overrides the ConvertFrom method of TypeConverter.
    public override object ConvertFrom(ITypeDescriptorContext context,
       CultureInfo culture, object value)
    {

        if (value is int)
        {
            //you can validate a range of int values here
            //for instance 
            //if (value >= 48 && value <= 57)
            //throw error
            //end if

            return char.ConvertFromUtf32(65);
        }
        return base.ConvertFrom(context, culture, value);
    }

    // Overrides the ConvertTo method of TypeConverter.
    public override object ConvertTo(ITypeDescriptorContext context,
       CultureInfo culture, object value, Type destinationType)
    {
        if (destinationType == typeof(int))
        {
            return char.ConvertToUtf32((string)value, 0);
        }
        return base.ConvertTo(context, culture, value, destinationType);
    }
}