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Convert string to unicode in C#?

How can I get the unicode values (from the code column) if I have the string?
For example, for passing the empty space " " I would like to get the value U+0020.
I found this approach:
byte[] asciiBytes1 = Encoding.ASCII.GetBytes(" ");
But this returns me the value from the decimal column.

If value is your decimal value:
string code = $"U+{value.ToString ("X4")}";
will give you what you want.
(X means hex, 4 means pad to 4 digits)

C# Hex String into Hex int

Can someone edit this to look better? Thanks!
I'm trying to have a string that is a Hex value but it is set by a third party (Not The Code Itself) and set it back to an int but still be a Hex value. C# Will let you have an int that is equal to a Hex if you have the 0x in front.
Code:
string HexValue = "0x0FC";
int OtherValue = Convert.ToInt(HexValue);
When I try this I get: 'Input string was not in a correct format.'

You can convert string into a int hex value by adding this System.Globalization.NumberStyles.HexNumber:
string HexValue = "0x0FC";
int OtherValue = int.Parse(HexValue.Substring(2),System.Globalization.NumberStyles.HexNumber);
Hope it helps!

Set the value of a new byte using a string?

I have a string with a numerical value that will fit into a data type byte variable (e.g. "243").
I want to set the byte to the numerical value of the string, something similar to byte myByte = 243; but using the string instead. How would this be possible?

Use byte.Parse() method:
byte myByte = byte.Parse("243");

You can do something like this
string myString = "243";
var byteData = Convert.ToByte(myString);

You can use this to convert your string value to byte:
byte MyByte = Convert.ToByte("243");

conversion to byte gives this error : Input string was not in a correct format

i am using convert.tobyte to convert string to byte. the problem is if the data is:
string data = "5";
byte b = Convert.tobyte(data); works fine.
but, if
string data = "S"
byte b = Convert.tobyte(data); DOESN'T WORK!
ERROR : Input string was not in a correct format
What is wrong and how to solve it?
Note: i am extracting a values from textbox, so the conversion works only if the input is number digits, not characters.
how to include the characters?
Thanks.

This is exactly how Convert.ToByte method works http://msdn.microsoft.com/en-us/library/y57wwkzk.aspx
Only digits in string accepted.
Did you meant converting the string to byte array? If so, use:
byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(yourString);
For strings containing only ASCII characters, the size of array will be equal to length of your string and every byte in array will be an ord value for the character. If string contains multibyte characters the size of array will be greater than length of string.

When you are not sure if a variable of string type could be correctly converted to a number you need to use the TryParse family of methods like Byte.TryParse method
string data = "S";
byte b;
if(byte.TryParse(data, out b))
Console.Writeline("Worked: " + b.ToString());
The TryParse has the advantage to not throw an exception if the string cannot be converted to a number and return just false or true while the out parameter is filled with the converted value if possible.

Converting string value to hex decimal

i am making application in c#. In that implication i have string which contain decimal value as
string number="12000";
The Hex equivalent of 12000 is 0x2EE0.
Here i want to assign that hex value to integer variable as
int temp=0x2EE0.
Please help me to convert that number.
Thanks in advance.

string input = "Hello World!";
char[] values = input.ToCharArray();
foreach (char letter in values)
{
// Get the integral value of the character.
int value = Convert.ToInt32(letter);
// Convert the decimal value to a hexadecimal value in string form.
string hexOutput = String.Format("{0:X}", value);
Console.WriteLine("Hexadecimal value of {0} is {1}", letter, hexOutput);
}
/* Output:
Hexadecimal value of H is 48
Hexadecimal value of e is 65
Hexadecimal value of l is 6C
Hexadecimal value of l is 6C
Hexadecimal value of o is 6F
Hexadecimal value of is 20
Hexadecimal value of W is 57
Hexadecimal value of o is 6F
Hexadecimal value of r is 72
Hexadecimal value of l is 6C
Hexadecimal value of d is 64
Hexadecimal value of ! is 21
*/
SOURCE: http://msdn.microsoft.com/en-us/library/bb311038.aspx

An int contains a number, not a representation of the number. 12000 is equivalent to 0x2ee0:
int a = 12000;
int b = 0x2ee0;
a == b
You can convert from the string "12000" to an int using int.Parse(). You can format an int as hex with int.ToString("X").

Well you can use class String.Format to Convert a Number to Hex
int value = Convert.ToInt32(number);
string hexOutput = String.Format("{0:X}", value);
If you want to Convert a String Keyword to Hex you can do it
string input = "Hello World!";
char[] values = input.ToCharArray();
foreach (char letter in values)
{
// Get the integral value of the character.
int value = Convert.ToInt32(letter);
// Convert the decimal value to a hexadecimal value in string form.
string hexOutput = String.Format("{0:X}", value);
Console.WriteLine("Hexadecimal value of {0} is {1}", letter, hexOutput);
}

If you want to convert it to hex string you can do it by
string hex = (int.Parse(number)).ToString("X");
If you want to put only the number as hex. Its not possible. Becasue computer always keeps number in binary format so When you execute int i = 1000 it stores 1000 as binary in i. If you put hex it'll be binary too. So there is no point.

you can try something like this if its going to be int
string number = "12000";
int val = int.Parse(number);
string hex = val.ToString("X");