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Using javascript regex containing '@' in razor

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13

2

I am performing email address validation with javascript in a razor view page.
The regex I am going to use is similar to the one proposed at Validate email address in JavaScript?

However, because the regex contains an '@' character, I am getting parser error when try to run the web app.

my regex looks like

/^...otherpart @* ... other part$/

I tried to add an '@' character to make the in the origin regex ... @@* ..., this eliminated the compilation error but seems to make the regex stops working. (we have used it in another web app that does not use razor engine, so I know it works).

Is there any other way to escape the '@' character?

javascript regex asp.net-mvc asp.net-mvc-4 razor

share|improve this question

edited May 23 '17 at 11:47

Community♦

111 silver badge

asked Oct 18 '13 at 3:14

Wei MaWei Ma

1,51744 gold badges3030 silver badges6464 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Have you tried wrapping your script block with <text><script>...</script></text>?
  
  – Jasen
  Oct 18 '13 at 3:28
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Jasen I have not tried the <text></text> trick. Will try tomorrow and let you know the result.
  
  – Wei Ma
  Oct 18 '13 at 3:32
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If you use this script is several places it's probably a good idea to put it in it's own .js file. Individual validation rules, such as max/min, could be put in data- attributes for elements and read via jQuery.
  
  – jfrankcarr
  Oct 18 '13 at 3:48
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Jasen,@jfankcarr. I have taken your advise and used a separate file and everything is working now. Thanks!
  
  – Wei Ma
  Oct 18 '13 at 17:43
  
  

  
  
  
  

add a comment | 

13

2

I am performing email address validation with javascript in a razor view page.
The regex I am going to use is similar to the one proposed at Validate email address in JavaScript?

However, because the regex contains an '@' character, I am getting parser error when try to run the web app.

my regex looks like

/^...otherpart @* ... other part$/

I tried to add an '@' character to make the in the origin regex ... @@* ..., this eliminated the compilation error but seems to make the regex stops working. (we have used it in another web app that does not use razor engine, so I know it works).

Is there any other way to escape the '@' character?

javascript regex asp.net-mvc asp.net-mvc-4 razor

share|improve this question

edited May 23 '17 at 11:47

Community♦

111 silver badge

asked Oct 18 '13 at 3:14

Wei MaWei Ma

1,51744 gold badges3030 silver badges6464 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Have you tried wrapping your script block with <text><script>...</script></text>?
  
  – Jasen
  Oct 18 '13 at 3:28
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Jasen I have not tried the <text></text> trick. Will try tomorrow and let you know the result.
  
  – Wei Ma
  Oct 18 '13 at 3:32
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If you use this script is several places it's probably a good idea to put it in it's own .js file. Individual validation rules, such as max/min, could be put in data- attributes for elements and read via jQuery.
  
  – jfrankcarr
  Oct 18 '13 at 3:48
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Jasen,@jfankcarr. I have taken your advise and used a separate file and everything is working now. Thanks!
  
  – Wei Ma
  Oct 18 '13 at 17:43
  
  

  
  
  
  

add a comment | 

I am performing email address validation with javascript in a razor view page.
The regex I am going to use is similar to the one proposed at Validate email address in JavaScript?

However, because the regex contains an '@' character, I am getting parser error when try to run the web app.

my regex looks like

/^...otherpart @* ... other part$/

I tried to add an '@' character to make the in the origin regex ... @@* ..., this eliminated the compilation error but seems to make the regex stops working. (we have used it in another web app that does not use razor engine, so I know it works).

Is there any other way to escape the '@' character?

javascript regex asp.net-mvc asp.net-mvc-4 razor

share|improve this question

edited May 23 '17 at 11:47

Community♦

111 silver badge

asked Oct 18 '13 at 3:14

Wei MaWei Ma

1,51744 gold badges3030 silver badges6464 bronze badges

/^...otherpart @* ... other part$/

share|improve this question

edited May 23 '17 at 11:47

Community♦

111 silver badge

asked Oct 18 '13 at 3:14

Wei MaWei Ma

1,51744 gold badges3030 silver badges6464 bronze badges

share|improve this question

edited May 23 '17 at 11:47

Community♦

111 silver badge

asked Oct 18 '13 at 3:14

Wei MaWei Ma

1,51744 gold badges3030 silver badges6464 bronze badges

edited May 23 '17 at 11:47

Community♦

111 silver badge

edited May 23 '17 at 11:47

Community♦

111 silver badge

asked Oct 18 '13 at 3:14

Wei MaWei Ma

1,51744 gold badges3030 silver badges6464 bronze badges

asked Oct 18 '13 at 3:14

Wei MaWei Ma

1,51744 gold badges3030 silver badges6464 bronze badges

3 Answers
3

active

oldest

votes

19

You can add another @ in front of it to escape @@, try leaving out the quantifer *. If this doesn't seem to work then add <text></text> around the function, it tells Razor to not parse the contents. Alternatively you can put Javascript in a separate file to accomplish your needs.

If for some reason you have multiple @@ in your string, place code blocks ahead @:@@

share|improve this answer

edited Oct 18 '13 at 3:56

answered Oct 18 '13 at 3:28

hwndhwnd

61k44 gold badges5858 silver badges101101 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I've tried a few things... <text> and beginning the line with @: but only @@ appears to do the trick. The other option is to use a separate file.
  
  – Jasen
  Oct 18 '13 at 3:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  agreed but it doesn't work.
  
  – Jasen
  Oct 18 '13 at 4:01
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  I would be inclined to put all of that into a separate file instead of writing a funky regex pattern to satisfy the Razor parser. Sometimes it's hard enough understanding a regex pattern without having to think about escaped characters.
  
  – Jasen
  Oct 18 '13 at 4:07
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Yeah. Separate file worked.
  
  – Wei Ma
  Oct 18 '13 at 17:45
  

  
  
  
  

add a comment | 

10

Put the following inside the regEx instead of @:

@('@')

The above will be rendered to a single @.

Your example will become:

/^...otherpart @('@')* ... other part$/

share|improve this answer

answered Jan 3 '16 at 18:59

Shadi NamroutiShadi Namrouti

2,4322020 silver badges2424 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This should be the accepted answer! Doubling up the @@ changes your REGEX and that's not what you want. still, I wish there were a better way to scape the @ sign in razor, something like @
  
  – Kemuel Sanchez
  Nov 16 '17 at 12:35
  

  
  
  
  

add a comment | 

0

Simply just use double @@.

It works for me and I think that is the only way.

share|improve this answer

edited Mar 21 '17 at 15:18

Alexander Stepaniuk

5,36044 gold badges2323 silver badges4545 bronze badges

answered Mar 20 '17 at 20:36

keyone2693keyone2693

1688 bronze badges

add a comment | 

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19

You can add another @ in front of it to escape @@, try leaving out the quantifer *. If this doesn't seem to work then add <text></text> around the function, it tells Razor to not parse the contents. Alternatively you can put Javascript in a separate file to accomplish your needs.

If for some reason you have multiple @@ in your string, place code blocks ahead @:@@

share|improve this answer

edited Oct 18 '13 at 3:56

answered Oct 18 '13 at 3:28

hwndhwnd

61k44 gold badges5858 silver badges101101 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I've tried a few things... <text> and beginning the line with @: but only @@ appears to do the trick. The other option is to use a separate file.
  
  – Jasen
  Oct 18 '13 at 3:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  agreed but it doesn't work.
  
  – Jasen
  Oct 18 '13 at 4:01
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  I would be inclined to put all of that into a separate file instead of writing a funky regex pattern to satisfy the Razor parser. Sometimes it's hard enough understanding a regex pattern without having to think about escaped characters.
  
  – Jasen
  Oct 18 '13 at 4:07
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Yeah. Separate file worked.
  
  – Wei Ma
  Oct 18 '13 at 17:45
  

  
  
  
  

add a comment | 

19

You can add another @ in front of it to escape @@, try leaving out the quantifer *. If this doesn't seem to work then add <text></text> around the function, it tells Razor to not parse the contents. Alternatively you can put Javascript in a separate file to accomplish your needs.

If for some reason you have multiple @@ in your string, place code blocks ahead @:@@

share|improve this answer

edited Oct 18 '13 at 3:56

answered Oct 18 '13 at 3:28

hwndhwnd

61k44 gold badges5858 silver badges101101 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I've tried a few things... <text> and beginning the line with @: but only @@ appears to do the trick. The other option is to use a separate file.
  
  – Jasen
  Oct 18 '13 at 3:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  agreed but it doesn't work.
  
  – Jasen
  Oct 18 '13 at 4:01
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  I would be inclined to put all of that into a separate file instead of writing a funky regex pattern to satisfy the Razor parser. Sometimes it's hard enough understanding a regex pattern without having to think about escaped characters.
  
  – Jasen
  Oct 18 '13 at 4:07
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Yeah. Separate file worked.
  
  – Wei Ma
  Oct 18 '13 at 17:45
  

  
  
  
  

add a comment | 

You can add another @ in front of it to escape @@, try leaving out the quantifer *. If this doesn't seem to work then add <text></text> around the function, it tells Razor to not parse the contents. Alternatively you can put Javascript in a separate file to accomplish your needs.

If for some reason you have multiple @@ in your string, place code blocks ahead @:@@

share|improve this answer

edited Oct 18 '13 at 3:56

answered Oct 18 '13 at 3:28

hwndhwnd

61k44 gold badges5858 silver badges101101 bronze badges

share|improve this answer

edited Oct 18 '13 at 3:56

answered Oct 18 '13 at 3:28

hwndhwnd

61k44 gold badges5858 silver badges101101 bronze badges

answered Oct 18 '13 at 3:28

hwndhwnd

61k44 gold badges5858 silver badges101101 bronze badges

answered Oct 18 '13 at 3:28

hwndhwnd

61k44 gold badges5858 silver badges101101 bronze badges

10

Put the following inside the regEx instead of @:

@('@')

The above will be rendered to a single @.

Your example will become:

/^...otherpart @('@')* ... other part$/

share|improve this answer

answered Jan 3 '16 at 18:59

Shadi NamroutiShadi Namrouti

2,4322020 silver badges2424 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This should be the accepted answer! Doubling up the @@ changes your REGEX and that's not what you want. still, I wish there were a better way to scape the @ sign in razor, something like @
  
  – Kemuel Sanchez
  Nov 16 '17 at 12:35
  

  
  
  
  

add a comment | 

10

Put the following inside the regEx instead of @:

@('@')

The above will be rendered to a single @.

Your example will become:

/^...otherpart @('@')* ... other part$/

share|improve this answer

answered Jan 3 '16 at 18:59

Shadi NamroutiShadi Namrouti

2,4322020 silver badges2424 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This should be the accepted answer! Doubling up the @@ changes your REGEX and that's not what you want. still, I wish there were a better way to scape the @ sign in razor, something like @
  
  – Kemuel Sanchez
  Nov 16 '17 at 12:35
  

  
  
  
  

add a comment | 

Put the following inside the regEx instead of @:

@('@')

The above will be rendered to a single @.

Your example will become:

/^...otherpart @('@')* ... other part$/

share|improve this answer

answered Jan 3 '16 at 18:59

Shadi NamroutiShadi Namrouti

2,4322020 silver badges2424 bronze badges

@('@')

/^...otherpart @('@')* ... other part$/

share|improve this answer

answered Jan 3 '16 at 18:59

Shadi NamroutiShadi Namrouti

2,4322020 silver badges2424 bronze badges

answered Jan 3 '16 at 18:59

Shadi NamroutiShadi Namrouti

2,4322020 silver badges2424 bronze badges

answered Jan 3 '16 at 18:59

Shadi NamroutiShadi Namrouti

2,4322020 silver badges2424 bronze badges

0

Simply just use double @@.

It works for me and I think that is the only way.

share|improve this answer

edited Mar 21 '17 at 15:18

Alexander Stepaniuk

5,36044 gold badges2323 silver badges4545 bronze badges

answered Mar 20 '17 at 20:36

keyone2693keyone2693

1688 bronze badges

add a comment | 

0

Simply just use double @@.

It works for me and I think that is the only way.

share|improve this answer

edited Mar 21 '17 at 15:18

Alexander Stepaniuk

5,36044 gold badges2323 silver badges4545 bronze badges

answered Mar 20 '17 at 20:36

keyone2693keyone2693

1688 bronze badges

add a comment | 

Simply just use double @@.

It works for me and I think that is the only way.

share|improve this answer

edited Mar 21 '17 at 15:18

Alexander Stepaniuk

5,36044 gold badges2323 silver badges4545 bronze badges

answered Mar 20 '17 at 20:36

keyone2693keyone2693

1688 bronze badges

share|improve this answer

edited Mar 21 '17 at 15:18

Alexander Stepaniuk

5,36044 gold badges2323 silver badges4545 bronze badges

answered Mar 20 '17 at 20:36

keyone2693keyone2693

1688 bronze badges

edited Mar 21 '17 at 15:18

Alexander Stepaniuk

5,36044 gold badges2323 silver badges4545 bronze badges

edited Mar 21 '17 at 15:18

Alexander Stepaniuk

5,36044 gold badges2323 silver badges4545 bronze badges

answered Mar 20 '17 at 20:36

keyone2693keyone2693

1688 bronze badges

answered Mar 20 '17 at 20:36

keyone2693keyone2693

1688 bronze badges