Regex to match alphanumeric and spaces

Question

What am I doing wrong here   string q    john s    string clean   Regex Replace q       a-zA-Z0-9    s    string Empty      clean     johns   I want  john s

User · Accepted Answer

just a FYI  string clean   Regex Replace q      a-zA-Z0-9 s    string Empty     would actually be better like  string clean   Regex Replace q       w s    string Empty

User · Answer

The following regex is for space inclusion in textbox   Regex r   new Regex    a-zA-Z  s      r IsMatch textbox1 text     This works fine for me

User · Answer

I got it   string clean   Regex Replace q      a-zA-Z0-9 s    string Empty     Didn t know you could put  s in the brackets

User · Answer

There appear to be two problems    You re using the   outside a    which matches the start of the line You re not using a   or   which means you will only match a single character    I think you want the following regex      a-zA-Z0-9 s

User · Answer

The following regex is for space inclusion in textbox   Regex r   new Regex    a-zA-Z  s      r IsMatch textbox1 text     This works fine for me

User · Answer

This   string clean   Regex Replace dirty     a-zA-Z0-9 x20    String Empty              x20 is ascii hex for  space  character      you can add more individual characters that you want to be allowed  If you want for example     to be ok in the return string add  x3f

User · Answer

bottom regex with space  supports all keyboard letters from different culture   string input    78-selim g  zel667       Regex regex   new Regex      w x20    d      var result  regex Replace input         selim g  zel

User · Answer

There appear to be two problems    You re using the   outside a    which matches the start of the line You re not using a   or   which means you will only match a single character    I think you want the following regex      a-zA-Z0-9 s

User · Answer

There appear to be two problems    You re using the   outside a    which matches the start of the line You re not using a   or   which means you will only match a single character    I think you want the following regex      a-zA-Z0-9 s

User · Answer

I suspect   doesn t work the way you think it does outside of a character class   What you re telling it to do is replace everything that isn t an alphanumeric with an empty string  OR any leading space   I think what you mean to say is that spaces are ok to not replace - try moving the  s into the    class

User · Answer

The circumflex inside the square brackets means all characters except the subsequent range   You want a circumflex outside of square brackets

User · Answer

I got it   string clean   Regex Replace q      a-zA-Z0-9 s    string Empty     Didn t know you could put  s in the brackets

User · Answer

I suspect   doesn t work the way you think it does outside of a character class   What you re telling it to do is replace everything that isn t an alphanumeric with an empty string  OR any leading space   I think what you mean to say is that spaces are ok to not replace - try moving the  s into the    class

User · Answer

I got it   string clean   Regex Replace q      a-zA-Z0-9 s    string Empty     Didn t know you could put  s in the brackets

User · Answer

bottom regex with space  supports all keyboard letters from different culture   string input    78-selim g  zel667       Regex regex   new Regex      w x20    d      var result  regex Replace input         selim g  zel

User · Answer

This   string clean   Regex Replace dirty     a-zA-Z0-9 x20    String Empty              x20 is ascii hex for  space  character      you can add more individual characters that you want to be allowed  If you want for example     to be ok in the return string add  x3f

User · Answer

The circumflex inside the square brackets means all characters except the subsequent range   You want a circumflex outside of square brackets

User · Answer

The circumflex inside the square brackets means all characters except the subsequent range   You want a circumflex outside of square brackets

User · Answer

There appear to be two problems    You re using the   outside a    which matches the start of the line You re not using a   or   which means you will only match a single character    I think you want the following regex      a-zA-Z0-9 s

User · Answer

I suspect   doesn t work the way you think it does outside of a character class   What you re telling it to do is replace everything that isn t an alphanumeric with an empty string  OR any leading space   I think what you mean to say is that spaces are ok to not replace - try moving the  s into the    class

User · Answer

I got it   string clean   Regex Replace q      a-zA-Z0-9 s    string Empty     Didn t know you could put  s in the brackets

User · Answer

The circumflex inside the square brackets means all characters except the subsequent range   You want a circumflex outside of square brackets

User · Answer

I suspect   doesn t work the way you think it does outside of a character class   What you re telling it to do is replace everything that isn t an alphanumeric with an empty string  OR any leading space   I think what you mean to say is that spaces are ok to not replace - try moving the  s into the    class

[c#] Regex to match alphanumeric and spaces

Examples related to c#

Examples related to regex