We Keep Coding

Custom naming rules in ReSharper

The project I'm working on (C# on VS 2015 with ReSharper 2016.1.2) has a new requirement which requires us to remove all usages of p_ prefixes in parameter names (p_Param becomes param).
I'd like to create a ReSharper Code Inspection Custom Pattern to take care of this for me (to match the string pattern with squiggly lines and auto-fix in the solution).
I've followed the tutorial at https://www.jetbrains.com/help/resharper/2016.1/Code_Inspection__Creating_Custom_Inspections_and_QuickFixes.html but I'm a bit stuck.
I've tried the following patterns:
Var 1
Find: $prefix$$varName$ ($prefix$ - identifier, matching regex [^p_*] (start with p_, continue with anything, $varName$ - identifier)
Replace $varName$
Var 2
Find: p_$varName$ ($varName$ - identifier)
Replace $varName
I'd also need to transform the $varName$ identifier from PascalCase to cammelCase (no ideea how to do this).
When searching via 'Search now' - no results are found in either situation.
Any help is appreciated.

Using ReSharper, you can change the naming style of variables and have it apply to an entire solution.
The location of this option will (probably) vary but for my version of R# (2016.1.2), it's under ReSharper->Options->Code Editing->C#->Naming Style:
From there, change the Entity Kinds to how you want them to appear. In mine, I prefer _lowerCamelCase for private instance fields for example.
Once your changes are made, find any field of that type in code (I'll use a private variable) that doesn't follow that format, click it and then click the light bulb to the left. From there mouse-over the arrow on "Rename to ......" and select Fix naming in solution.
You might have to do it a few times but that's how I rename stuff based on my preferred code style.

Automated refactoring: Add an argument to all method invocations

So, in my ASP.NET C# code base I have possibly hundreds of bits of code like this:
Response.Redirect("something.aspx?Error=" + ex.Message);
I want to automatically add an argument to all of these method calls to add 'true' as the second parameter to this method, like this:
Response.Redirect("sometihng.aspx?Error=" + ex.Message, true);
I have Visual Studio 2010 and the latest version of Resharper at my disposal.
I tried using the 'Search with Pattern' feature in Resharper (VS menu -> ReSharper -> Find -> Search with Pattern) to see if this would automatically refactor my codebase, but I'm not sure exactly how or if it works. Here's what I tried:
On the right-hand side, I created an 'Argument' placeholder called 'anyString', in the hope that this would find and replace all invocations of Response.Redirect that have a string in the first argument, but this found no matches in my code-base.
Any ideas on how I might solve this without resorting to manually changing all references?

As per the Jetbrains Resharper documentation on 'Searching a Code with Pattern':
Pay attention, that when you use a placeholder, its name should be
enclosed with dollar signs (use the syntax $xx$, where xx represents
placeholder name),whereas when you create a new placeholder, you
should omit these special symbols.
Therefore, I was on the right track. Also for the placeholder I just need '$anyString$' and it will find all invocations of the method, even if they are made up multiple string objects (e.g. string literals and string objects). So this is how it would look:
The 'anyString' placeholder pattern was created by performing the following steps:
1) Click 'Add Placeholder' -> Argument
2) Give it a name, e.g. 'anyString'
For my case, I also checked the 'Limit minimal number of arguments' and selected 1, and I also checked the 'Maximal' box and set that to 1 also.
The 'Save' button is also useful if you intend on reusing the pattern again.

why does MS anti xss library (v4) remove html 5 data attributes

AntiXss library seems to strip out html 5 data attributes, does anyone know why?
I need to retain this input:
<label class='ui-templatefield' data-field-name='P_Address3' data-field-type='special' contenteditable='false'>[P_Address3]</label>
The main reason for using the anti xss library (v4.0) is to ensure unrecognized style attributes are not parsed, is this even possible?
code:
var result = Sanitizer.GetSafeHtml(html);
EDIT:
The input below would result in the entire style attributes removed
Input:
var input = "<p style=\"width:50px;height:10px;alert('evilman')\"/> Not sure why is is null for some wierd reason!<br><p></p>";
Output:
var input = "<p style=\"\"/> Not sure why is is null for some wierd reason!<br><p></p>";
Which is fine, if anyone messes around with my code on client side, but I also need the data attribute tags to work!

I assume you mean the sanitizer, rather than the encoder. It's doing what it's supposed to - it simply doesn't understand HTML5 or recognise the attributes, so it strips them. There are ways to XSS via styles.
It's not possible to customise the safe list either I'm afraid, the code base simply doesn't allow for this - I know a large number of people want those, but it would take a complete rewrite to support it.

c# Use two validators on the same field

I have run into a problem trying to modify a form I myself have not built.
The form has a asp:input field for a date value, wich is checked by a requiredFieldVal and a rangeVal. The rangeVal has type set to "date" and min value 2000-01-01: max value 3000-01-01
Now to the problem, I'm trying to add so that the user also can input the date in the form of "20000101" in other words without the "-".
I tried adding another rangeVal with Integer type and the min,max values, and put them both in the same ValidationGroup, but that didnt work.
How do I allow the user to use both (either one of them) formats in the date input field.
Thank you in advance!

When you use multiple validation controls to validate a single control all of the validation controls must pass.
You could use a regular expression (as Kevin points out) but doing the validation you require (checking that the value is a valid DateTime object and within the specified range) will be difficult to do cleanly.
I'd suggest writing your own CustomValidator control and then use that to validate your values however you want to.

You can use a regular expression validator in place of the range validator. I'm a little rusty with Regex, but I am sure you can find something here.
http://www.regular-expressions.info/
Here is a link to the dates page:
http://www.regular-expressions.info/dates.html
try this, I think it will work. If not, let me know and I will work on correcting it:
((19|20)\d\d[- /.](0[1-9]|1[012])[-/.](0[1-9]|[12][0-9]|3[01])|((19|20)\d\d(0[1-9]|1[012])(0[1-9]|[12][0-9]|3[01])))
Another post brought up a point this regex won't validate some invalid dates like feb 31. In this case, I would just create a validation class which inherits from the regex validator and override the EvaluateIsValid method and check to see if it is an actual date. This allows most of the validation done on the client end, with the backup being at the server level which should be doing a secondary validation anyway.

Regex index in matching string where the match failed

I am wondering if it is possible to extract the index position in a given string where a Regex failed when trying to match it?
For example, if my regex was "abc" and I tried to match that with "abd" the match would fail at index 2.
Edit for clarification. The reason I need this is to allow me to simplify the parsing component of my application. The application is an Assmebly language teaching tool which allows students to write, compile, and execute assembly like programs.
Currently I have a tokenizer class which converts input strings into Tokens using regex's. This works very well. For example:
The tokenizer would produce the following tokens given the following input = "INP :x:":
Token.OPCODE, Token.WHITESPACE, Token.LABEL, Token.EOL
These tokens are then analysed to ensure they conform to a syntax for a given statement. Currently this is done using IF statements and is proving cumbersome. The upside of this approach is that I can provide detailed error messages. I.E
if(token[2] != Token.LABEL) { throw new SyntaxError("Expected label");}
I want to use a regular expression to define a syntax instead of the annoying IF statements. But in doing so I lose the ability to return detailed error reports. I therefore would at least like to inform the user of WHERE the error occurred.

I agree with Colin Younger, I don't think it is possible with the existing Regex class. However, I think it is doable if you are willing to sweat a little:
Get the Regex class source code
(e.g.
http://www.codeplex.com/NetMassDownloader
to download the .Net source).
Change the code to have a readonly
property with the failure index.
Make sure your code uses that Regex
rather than Microsoft's.

I guess such an index would only have meaning in some simple case, like in your example.
If you'll take a regex like "ab*c*z" (where by * I mean any character) and a string "abbbcbbcdd", what should be the index, you are talking about?
It will depend on the algorithm used for mathcing...
Could fail on "abbbc..." or on "abbbcbbc..."

I don't believe it's possible, but I am intrigued why you would want it.

In order to do that you would need either callbacks embedded in the regex (which AFAIK C# doesn't support) or preferably hooks into the regex engine. Even then, it's not clear what result you would want if backtracking was involved.

It is not possible to be able to tell where a regex fails. as a result you need to take a different approach. You need to compare strings. Use a regex to remove all the things that could vary and compare it with the string that you know it does not change.
I run into the same problem came up to your answer and had to work out my own solution. Here it is:
https://stackoverflow.com/a/11730035/637142
hope it helps