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#2 RazorBlade - Text.Has() tells you if something really has content

RazorBlade - Text.First() lets you pick a value from many variables

Requirements

RazorBlade 3.09

Resources

Text.Has(...)

RazorBlade Text.Has(...) v1.1

These demos show how to really check if a variable has text using Text.Has. This combines checks for...

null
empty
only html-nbsp
only html character #160 (also nbsp)
only new-line

Note that these examples use functions, emojis and RazorBlade Fluent API so click on the links if you don't understand that.

Examples

Test	Code	Result	...when html counts
Null value	Text.Has(null)	❌	❌
Just spaces	Text.Has(" ")	❌	❌
text with only line breaks	Text.Has("\n\n")	❌	❌
tabs, spaces and line breaks	Text.Has("\n\t \n")	❌	❌
only nbsp characters	Text.Has("   ")	❌	✔️
char-code of nbsp characters	Text.Has(" ")	❌	✔️
real text	Text.Has("real text")	✔️	✔️
Real text with nbps etc.	Text.Has("real\n text  ")	✔️	✔️

<table class="demo table table-hover">
  <tr>
    <th>Test</th>
    <th>Code</th>
    <th>Result</th>
    <th>...when html counts</th>
  </tr>
  @RowEmojified("Null value", null)
  @RowEmojified("Just spaces", "     ")
  @RowEmojified("text with only line breaks", "\n\n")
  @RowEmojified("tabs, spaces and line breaks", "\n\t  \n")
  @RowEmojified("only nbsp characters", "&nbsp; &nbsp;")
  @RowEmojified("char-code of nbsp characters", "&#160;")
  @RowEmojified("real text", "real text")
  @RowEmojified("Real text with nbps etc.", "real\n text &nbsp;")
</table>

Special case: <BR> Whitespace

If your string is like Text.Has("<br>") it will be: True
If you want to ignore BRs, combine it with Tags.Br2Nl(...)
...resulting in:

Output

False

@Text.Has(Tags.Br2Nl("<br>"))

RazorBlade - Text.Crop() and Text.Ellipsis()

#2 RazorBlade - Text.Has() tells you if something really has content

RazorBlade - Text.First() lets you pick a value from many variables

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><em>RazorBlade</em> Text.Has(...) <em>v1.1</em></h2>
      <p>
        These demos show how to really check if a variable has text using Text.Has. This combines checks for...
      </p>
      <ul>
        <li>null</li>
        <li>empty</li>
        <li>only html-nbsp</li>
        <li>only html character #160 (also nbsp)</li>
        <li>only new-line</li>
      </ul>
    </div>
  </div>

  <div class="alert alert-success mt-2" role="alert">
    Note that these examples use @Sys.TutLink("functions", "reuse=home"),  @Sys.TutLink("emojis", "html210") and @Sys.TutLink("RazorBlade Fluent API", "blade800") so click on the links if you don't understand that.
  </div>


@functions {
  // Quick helper to convert true/false into emojis
  string Boolmoji(bool value) { return value ? "✔️" : "❌"; }

  // Create a row (TR) containing data about a Text.Has example
  dynamic RowEmojified(string label, string value) {
    var valueForShowing = value == null 
      ? "null" 
      : "\"" + value.Replace("\n", "\\n").Replace("\t", "\\t") + "\"";
    return Tag.Tr(
      Tag.Td(label),
      Tag.Td("Text.Has(" + Tags.Encode(valueForShowing) + ")"),
      Tag.Td(Boolmoji(Text.Has(value))),
      Tag.Td(Boolmoji(Text.Has(value, false)))
    );
  }
}

<h2>Examples</h2>

  <table class="demo table table-hover">
    <tr>
      <th>Test</th>
      <th>Code</th>
      <th>Result</th>
      <th>...when html counts</th>
    </tr>
    @RowEmojified("Null value", null)
    @RowEmojified("Just spaces", "     ")
    @RowEmojified("text with only line breaks", "\n\n")
    @RowEmojified("tabs, spaces and line breaks", "\n\t  \n")
    @RowEmojified("only nbsp characters", "&nbsp; &nbsp;")
    @RowEmojified("char-code of nbsp characters", "&#160;")
    @RowEmojified("real text", "real text")
    @RowEmojified("Real text with nbps etc.", "real\n text &nbsp;")
  </table>



<h2>Special case: &lt;BR&gt; Whitespace</h2>

<ul>
  <li>If your string is like Text.Has("&lt;br&gt;") it will be: @Text.Has("<br>")</li>
  <li>If you want to ignore BRs, combine it with @Sys.TutLink("Tags.Br2Nl(...)", "blade220") </li>
  <li>...resulting in:</li>
</ul>

 @Text.Has(Tags.Br2Nl("<br>"))



<!-- unimportant stuff, hidden -->