validate file name using jquery

Try something like this.

how would I add it to a add.validator function

Below is a link to the JQuery validator plugin, and followed by an example using a regexp

http://docs.jquery.com/Plugins/Validation/rules

http://stackoverflow.com/questions/280759/jquery-validate-how-to-add-a-rule-for-regular-expression-validation

JonNorman

the code does not work. basically no validation is triggering

Hi erik, you are either not using the plugin http://docs.jquery.com/Plugins/Validation or you are not then calling the method you have setup using validator.addMethod.

jQuery.validator.addMethod("filename", function(value, element) { 
  return this.optional(element) || /^(?!^(PRN|AUX|CLOCK\$|NUL|CON|COM\d|LPT\d|\..*)(\..+)?$)[^\x00-\x1f\\?*:\";|/]+$/g.test(value); 
}, "Please specify a valid file name");
$("#myform").validate({
  rules: {
    fileName: "filename"
  }
});

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Have a look at the documententation, this will show you how to set-up custom validator methods and look at the built in methods for how to use them.

I am using the method but I am  calling the method like this
rules: {
    fileName: "true"
  }

that to me says that the field with the name "fileName" is looking for a method called "true" to do the validation, if your field is named "fileName" you should do:

rules: {
    fileName: "filename"
  } 

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Where filename (all lowercase) is the name of the method you have added, and fileName (java case) is the name of your field.

the reason I am asking is I need to do this validation conditionally, so if for example var x = 1 the validate filename other wise do not

Hi Erik,

I suggest that in the method you add you should do the conditional check:

jQuery.validator.addMethod("filenameOrxEquals1", function(value, element) { 
  return this.optional(element) || x==1 || /^(?!^(PRN|AUX|CLOCK\$|NUL|CON|COM\d|LPT\d|\..*)(\..+)?$)[^\x00-\x1f\\?*:\";|/]+$/g.test(value); 
}, "Please specify a valid file name");
$("#myform").validate({
  rules: {
    fileName: "filename"
  }
});
...
rules: {
    fileName: "filenameOrxEquals1"
  } 

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this sets up the method called filenameOrxEquals1 and then uses it in the rules for the fileName field.