如何在 C# 中将字符串转换为 ascii 到二进制？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/736533/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How do you convert a string to ascii to binary in C#?
提问by Kredns
A while back (freshman year of high school) I asked a really good C++ programmer who was a junior to make a simple application to convert a string to binary. He gave me the following code sample:
不久前（高中一年级），我问一位非常优秀的 C++ 程序员，他是一名大三学生，他制作了一个简单的应用程序，将字符串转换为二进制。他给了我以下代码示例：
void ToBinary(char* str)
{
char* tempstr;
int k = 0;
tempstr = new char[90];
while (str[k] != 'var str = "Hello world";
With LINQ
foreach (string letter in str.Select(c => Convert.ToString(c, 2)))
{
Console.WriteLine(letter);
}
Pre-LINQ
foreach (char letter in str.ToCharArray())
{
Console.WriteLine(Convert.ToString(letter, 2));
}
')
{
itoa((int)str[k], tempstr, 2);
cout << "\n" << tempstr;
k++;
}
delete[] tempstr;
}
So I guess my question is how do I get an equivalent to the itoa function in C#? Or if there is not one how could I achieve the same effect?
所以我想我的问题是如何获得与 C# 中的 itoa 函数等效的函数？或者如果没有，我怎么能达到同样的效果？
采纳答案by Samuel
This is very easy to do with C#.
这很容易用 C# 做到。
return Convert.ToString(int.Parse(str), 2); // "5" --> "101"
回答by JP Alioto
Use an ASCIIEncodingclass and call GetBytespassing the string.
使用ASCIIEncoding类并调用GetBytes传递字符串。
回答by mqp
It's not clear precisely what you want, but here's what I think you want:
目前还不清楚你想要什么，但我认为你想要的是：
string[] binaryDigits = str.Select(c => Convert.ToString(c, 2));
foreach(string s in binaryDigits) Console.WriteLine(s);
This isn't what the C++ code does. For that, I suggest:
这不是 C++ 代码所做的。为此，我建议：
protected void Page_Load(object sender, EventArgs e)
{
string page = "";
int counter = 0;
foreach (string s in Request.QueryString.AllKeys)
{
if (s != Request.QueryString.Keys[0])
{
page += s;
page += "=" + BinaryCodec.encode(Request.QueryString[counter]);
}
else
{
page += Request.QueryString[0];
}
if (!page.Contains('?'))
{
page += "?";
}
else
{
page += "&";
}
counter++;
}
page = page.TrimEnd('?');
page = page.TrimEnd('&');
Response.Redirect(page);
}
public class BinaryCodec
{
public static string encode(string ascii)
{
if (ascii == null)
{
return null;
}
else
{
char[] arrChars = ascii.ToCharArray();
string binary = "";
string divider = ".";
foreach (char ch in arrChars)
{
binary += Convert.ToString(Convert.ToInt32(ch), 2) + divider;
}
return binary;
}
}
public static string decode(string binary)
{
if (binary == null)
{
return null;
}
else
{
try
{
string[] arrStrings = binary.Trim('.').Split('.');
string ascii = "";
foreach (string s in arrStrings)
{
ascii += Convert.ToChar(Convert.ToInt32(s, 2));
}
return ascii;
}
catch (FormatException)
{
throw new FormatException("SECURITY ALERT! You cannot access a page by entering its URL.");
}
}
}
}
回答by Jarrod
Thanks, this is great!! I've used it to encode query strings...
谢谢，这太棒了！！我用它来编码查询字符串......
public static string ToBinary(this string data, bool formatBits = false)
{
char[] buffer = new char[(((data.Length * 8) + (formatBits ? (data.Length - 1) : 0)))];
int index = 0;
for (int i = 0; i < data.Length; i++)
{
string binary = Convert.ToString(data[i], 2).PadLeft(8, '0');
for (int j = 0; j < 8; j++)
{
buffer[index] = binary[j];
index++;
}
if (formatBits && i < (data.Length - 1))
{
buffer[index] = ' ';
index++;
}
}
return new string(buffer);
}
回答by Krythic
Here's an extension function:
这是一个扩展函数：
Console.WriteLine("Testing".ToBinary());
You can use it like:
你可以像这样使用它：
01010100011001010111001101110100011010010110111001100111
which outputs:
输出：
##代码##and if you add 'true' as a parameter, it will automatically separate each binary sequence.
如果您添加 'true' 作为参数，它将自动分隔每个二进制序列。
