how can I convert a char to a char* in c#?

Question

how can I convert a char to a char* in c#?

I'm initializeing a String object like this:

String test=new String('c');

and I'm getting this error:

Argument '1': cannot convert from 'char' to 'char*'

Answer 1

That is a bit of a strange way to initialize a string, if you know beforehand what you want to store in it.

You can simply use:

String test="c";

If you have a specific need to convert a char variable to a string, you can use the built in ToString() function:

String test = myCharVariable.ToString();

Answer 2

unsafe
{
    char c = 'c';
    char *ch = &c;
}

Your example has a String and a compile error from using one of the String constructor overloads, so I'm guessing you really just want an array of chars, aka a String and maybe not a char* .

In which case:

char c = 'c';
string s = c.ToString(); // or...
string s1 = "" +c;

Also available:

unsafe
{
    char c = 'c';
    char* ch = &c;
    string s1 = new string(ch);
    string s2 = new string(c, 0);
}

Answer 3

string myString1 = new string(new char[] {'a'});
string myString2 = 'a'.ToString();
string myString3 = "a";
string myString4 = new string('a', 1);
unsafe {
    char a = 'a';
    string myString5 = new string(&a);
}

Answer 4

There is no overload of the public constructor for String that accepts a single char as a parameter. The closest match is

public String(char c, int count)

which creates a new String that repeats the char c count times. Thus, you could say

string s = new string('c', 1);

There are other options. There is a public constructor of String that accepts a char[] as a parameter:

public String(char[] value)

This will create a String that is initialized with the Unicode characters in value . Thus you could say

char c = 'c';
string s = new String(new char[] { c });

Another option is to say

char c = 'c'
string s = c.ToString();

But the most straightforward approach that most will expect to see is

string s = "c";

As for converting a char to a char * you can not safely do this. If you want to use the overload of the public constructor for String that accepts a char * as a parameter, you could do this:

unsafe {
    char c = 'c';
    char *p = &c;
    string s = new string(p);
}

Answer 5

不能再有另一个答案：

string test = string.Empty + 'c';

Answer 6

String类有许多构造函数，如果您要创建包含一个字符的字符串，则可以使用以下内容：

String test = new String(new char[] { 'c' });

Answer 7

如果你正在编写它，你有什么理由不能使用：

String test = "c";

Answer 8

怎么样：

var test = 'c'.ToString()

Answer 9

When using a char in the String constructor, you should also give a count parameter to specify how many times that character should be added to the string:

String test=new String('c', 1);

See also here .

Answer 10

使用

String test("Something");

Answer 11

String test = new String（new char [] {'c'}）;

Answer 12

The easiest way to do this conversion from your example is just change the type of quotes you are using from single quotes

String test = new String('c');

to double quotes and remove the constructor call:

String test = "c";

Answer 13

char c = 'R';
char *pc = &c;

Answer 14

Using single quotes (as in your question: 'c' ) means that you are creating a char . Using double quotes, eg "c" , means you creating a string . These are not interchangable types in c#.

A char* , as you might be aware, is how strings are represented in c++ to some extent, and c# supports some of the conventions of c++. This means that a char* can easily (for the programmer at least) be converted to a string in c#. Unfortunately a char is not inherently a char*, so the same cannot be done.