Razor Blade Tutorials

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

RazorBlade API Docs

Text.Has(...)

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  ")	✔️	✔️

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: False

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.

@inherits Custom.Hybrid.Razor12
@using ToSic.Razor.Blade;
<!-- unimportant stuff, hidden -->
RazorBlade Text.Has(...) v1.1 These... <!-- unimportant stuff, hidden -->

@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 @hlp.TutLink("Tags.Br2Nl(...)", "blade220") </li>
  <li>...resulting in: @Text.Has(Tags.Br2Nl("<br>"))</li>
</ul>


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