C # Remove string Spaces

(1) trim method

String TT = "AAA ";

Tt = TT. Trim () function for removing spaces at the beginning and end of a string

Tt = TT. trimend () Remove the trailing space of the string

Tt = TT. trimstart () Remove the first space of the string

(2) Remove spaces from characters using ASCII values

Since the ASCII value of space is 32, when removing all spaces in the string, you only need to cyclically access all characters in the string and determine whether their ASCII value is 32. Remove all spaces in the string.CodeAs follows:

Charenumerator cenumerator = textbox1.text. getenumerator ();

While (cenumerator. movenext ())

{

Byte [] array = new byte [1];

Array = system. Text. encoding. ASCII. getbytes (cenumerator. Current. tostring ());

Int asciicode = (short) (array [0]);

If (asciicode! = 32)

{

Textbox2.text + = cenumerator. Current. tostring ();

}

}

The three methods can only remove halfwidth spaces, but not fullwidth spaces.

(3) Replace Method

Use the replace method that comes with the string: Str. Replace ("", "") ----------- STR is the input or the string to be checked.

# Replace function. Note the following for its parameters:

If its parameter is an expression, the system first computes the expression for preprocessing and then performs the replacement operation.

For example, (getnamebyid is a function ):

String strsource = "this is an example ";

Strsource = strsource. Replace ("name", getnamebyid (1 ));

Obviously, strsource does not contain "name", so it will not be replaced. However, getnamebyid is called every time this line of code is replaced. If getnamebyid is more complex logic, or the replacement operation is in a loop, the system efficiency will be greatly affected.

Recommended:

If (strsource. indexof ("name")>-1)

{

Strsource = strsource. Replace ("name", getnamebyid (1 ));

}