Help with this Helper[Answered] RSS

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  jw7965

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  Help with this Helper

  Aug 17, 2013 12:10 PM|jw7965|LINK

  Hi. I would appreciate some help in getting this Helper working.

  I have a folder App_Code and in it Helpers.cshtml. In it is the code for Truncate helper:

  @helper Truncate(string input, int length)
  {
      if (input.Length <= length) {
          @input
      } else {
          @input.Substring(0, length)
      }
  }

  And the code in my webgrid:

  grid.Column("MemberComment", "Member Comment", format: @@Html.Truncate(@item.MemberComment, 200)),
  

  This errors with: CS1646: Keyword, identifier, or string expected after verbatim specifier: @

  I tried various combinations of @Html, @@Html, @item, item and <text></text> with no luck.

  Any suggestions?

• • Reply
  Nasser Malik

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  Re: Help with this Helper

  Aug 17, 2013 12:28 PM|Nasser Malik|LINK

  Try like

  grid.Column("MemberComment", "Member Comment", format: @(Html.Truncate(Convert.ToString(item.MemberComment), 200))),

  Please Mark as Answer if find helpful -- Nasser --
  Skype: maleknasser1
  LinkedIn: https://www.linkedin.com/in/maliknasser
  
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  rrrsr7205

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  Re: Help with this Helper

  Aug 17, 2013 12:36 PM|rrrsr7205|LINK

  Does @Helpers.Truncate help?

  You may be better served by defining a function for the truncate, as opposed to an Html helper.  The function would return one of the two possible results shown in your helper.  They would be returned to the code as a string and the calling code can then determine how the results are displayed/formatted.

  You will also want to put a test for  input==null in your helper

  RRR
• • Reply
  jw7965

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  Re: Help with this Helper

  Aug 17, 2013 12:52 PM|jw7965|LINK

  Hi Nasser.

  Thanks for the suggestion but I get the same error with this, i.e. CS1646: Keyword, identifier, or string expected after verbatim specifier: @

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  jw7965

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  Re: Help with this Helper

  Aug 17, 2013 12:59 PM|jw7965|LINK

  HI.

  Yes this approach works - thanks!

  Here's the final code:

  grid.Column("MemberComment", "Member Comment", format:@<text>@(Helpers.Truncate(Convert.ToString(item.MemberComment), 200)))</text>),

  I'm still quite new when it comes to fuctions and helpers, obviously, but I'll give your suggestion a try.

  Thx again.

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  Mikesdotnett...

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  Re: Help with this Helper

  Aug 17, 2013 01:42 PM|Mikesdotnetting|LINK

  rrrsr7025 is correct. You should define this as a function not a helper. For more infomration on the difference between the two, see this: http://www.mikesdotnetting.com/Article/173/The-Difference-Between-@Helpers-and-@Functions-In-WebMatrix

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• • Reply
  jw7965

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  Re: Help with this Helper

  Aug 18, 2013 04:13 PM|jw7965|LINK

  Just in case there are other newbies like myslef interested in defining functions here is my Truncate function:

  public static HtmlString Truncate(string value, int length){
          if(value == null || value.Length <= length){
              return new HtmlString(value);
              } else {
               return new HtmlString(value.Substring(0, length)); 
              }
      }  

  And the code to use it in webgrid:

  grid.Column("Comment", format:@<text> @(Functions.Truncate(Convert.ToString(item.Comment), 200))</text>),