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Exclusion Expressions

This category lets you define regular expressions that are used to exclude spans of text from the spell checking process. This is useful for excluding things such as common format specifier patterns in designer code, CSS class name patterns, control name patterns, etc.

To add a new expressions, click the Add button. A dialog box will appear in which you can enter the expression and indicate which options if any should be used with it (Ignore Case, Multi-line, and/or Single Line). A comment can also be entered to describe the entry. To edit an expression, select it in the list and click the Edit button or double click it. The same dialog box will appear in which you can modify the expression settings. To remove an expression, select it in the list and click the Remove button.

For non-global settings, an option is available to inherit the exclusion expressions from configurations above the current one. If enabled, any additional expressions in the current configuration are added to those. If disabled, the settings in the current configuration will replace the inherited list of exclusion expressions. If not inherited and the list is left empty, it effectively clears the list of exclusion expressions.

The following are some common date/time format specifiers that may appear in designer code. In designer code, the format specifiers are typically not contained with braces and are thus included in the spell checking process. This can result in a large number of misspelling reports for non-words such as "dd" and "yyyy" in format specifiers such as "MM/dd/yyyy". By using one or more exclusion expressions to ignore such spans, they can be removed and not reported.

Example Exclusion Expressions
Various Date/Time Formats

(d{1,2}, )?yyyy
(d{1,2}[/\- ])?yy(yy)?
d{3,4}( dd)?
h{1,2}:(mm|nn)(:ss)?(.f{1,4})?( tt| AM/?PM)?  Options: Ignore Case
M{2,4}[/\- ]d{1,2}
M{2,4} yyyy


[{(]?[0-9A-F]{8}[-]?([0-9A-F]{4}[-]?){3}[0-9A-F]{12}[)}]?  Options: Ignore Case

Another example is CSS class name or control ID patterns. For example, adding the expression btn[a-z\-]*? would prevent the ID and class names from being reported in the following line of Razor code in an HTML file.

@Html.MyButton("Save", id: "btn-save", classes: "btn btn-default my-btn-class")
Tip Tip

It is possible that a large number of exclusion expressions may slow down the overall spell checking process, especially for spell checking as you type. It may be better to define expressions common to a particular type of project within that project's solution or project spell checking configuration file rather than putting all of them in the global configuration.

See Also

Other Resources