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URL Parameters (text)
#2 URL Parameters (number)
Preserve Parameters
Requirements
Resources
Related

Working with number URL Parameters

When you expect a number, you usually need to convert it to an int or similar for further use. Otherwise you'll be comparing numbers with strings. For example if (3 == "3") would return false - which is not what you usually want.
Additionally, you usually want to ensure that if no parameter is found, you will have a default value - othertise you may run into errors.

Output

  • Raw id from URL:
    Equal to string "27": False
    Equal to number 27: (would throw error)
  • Number id from URL: 0
    Equal to string "27": (would throw error)
    Equal to number 27: False 
@{
   // This variable is a string, but could be null or empty
   var idAsString = CmsContext.Page.Parameters["id"];
   // This converts the id parameter to int and takes 0 as fallback
   var id = Kit.Convert.ToInt(CmsContext.Page.Parameters["id"], 0);
 }
 <ul>
   <li>
     <strong>Raw id from URL:</strong> @idAsString <br>
     Equal to string "27": @(idAsString == "27") <br>
     Equal to number 27: (would throw error) <br>
   </li>
   <li>
     <strong>Number id from URL:</strong> @id <br>
     Equal to string "27": (would throw error) <br>
     Equal to number 27: @(id == 27) <br>
   </li>
 </ul>
URL Parameters (text)
#2 URL Parameters (number)
Preserve Parameters

Source Code of this file

Below you'll see the source code of the file. Note that we're just showing the main part, and hiding some parts of the file which are not relevant for understanding the essentials. Click to expand the code

@inherits Custom.Hybrid.Razor14
@using ToSic.Razor.Blade;
<!-- unimportant stuff, hidden -->


<div @Sys.PageParts.InfoWrapper()>
  @Html.Partial("../shared/DefaultInfoSection.cshtml")
  <div @Sys.PageParts.InfoIntro()>
    <h2>Working with <em>number</em> URL Parameters</h2>
    <p>
      When you expect a number, you usually need to convert it to an <code>int</code> or similar for further use. Otherwise you'll be comparing numbers with strings. For example <code>if (3 == "3")</code> would return <code>false</code> - which is not what you usually want. <br>
      Additionally, you usually want to ensure that if no parameter is found, you will have a default value - othertise you may run into errors.
    </p>
    <ul>
      @SubpageLink("This page without additional params", "")
      @SubpageLink("put ?id=27 in the url", "id=27")
    </ul>
  </div>
</div>

 @{
    // This variable is a string, but could be null or empty
    var idAsString = CmsContext.Page.Parameters["id"];
    // This converts the id parameter to int and takes 0 as fallback
    var id = Kit.Convert.ToInt(CmsContext.Page.Parameters["id"], 0);
  }
  <ul>
    <li>
      <strong>Raw id from URL:</strong> @idAsString <br>
      Equal to string "27": @(idAsString == "27") <br>
      Equal to number 27: (would throw error) <br>
    </li>
    <li>
      <strong>Number id from URL:</strong> @id <br>
      Equal to string "27": (would throw error) <br>
      Equal to number 27: @(id == 27) <br>
    </li>
  </ul>



<hide>
@functions {
  dynamic SubpageLink(string label, string urlparams) {
    return Tag.Li()
      .Wrap(
        Tag.A(label).Href(Link.To(parameters: "?basics311=page&" + urlparams))
      );
  }
}

@* Footer *@
@Html.Partial("../Shared/Layout/FooterWithSource.cshtml", new { Sys = Sys })