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POWPF Validation of Textbox, what should the binding look like?
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  1. POWPF Validation of Textbox, what should the binding look like?
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    copied!<p>I'm trying to validate a textbox in WPF. I found some examples on the internet and I've put together some things. But right now it just validates everything as if it was wrong. I was told it's my binding, as I'm not sure what to bind to what I've come here for some clarification :)</p> <p>Here's my validator:</p> <pre class="lang-cs prettyprint-override"><code>class TextRangeValidator : ValidationRule { private int _minimumLength = 0; private int _maximumLength = 0; private string _errorMessage; public int MinimumLength { get { return _minimumLength; } set { _minimumLength = value; } } public int MaximumLength { get { return _maximumLength; } set { _maximumLength = value; } } public string ErrorMessage { get { return _errorMessage; } set { _errorMessage = value; } } public override ValidationResult Validate(object value, CultureInfo cultureInfo) { ValidationResult result = new ValidationResult(true, null); string inputString = (string)value.ToString(); if (inputString.Length &lt; this.MinimumLength || ( inputString.Length &gt; this.MaximumLength)) { result = new ValidationResult(false, this.ErrorMessage); } return result; } } </code></pre> <p>Here's my xaml code:</p> <pre><code>&lt;TextBox Height="23" HorizontalAlignment="Left" Margin="118,60,0,0" Name="CreateUserCPRTextbox" VerticalAlignment="Top" Width="120" &gt; &lt;TextBox.Text &gt; &lt;Binding Path="Name" UpdateSourceTrigger="PropertyChanged" ValidatesOnDataErrors="true"&gt; &lt;Binding.ValidationRules &gt; &lt;validators:TextRangeValidator ValidatesOnTargetUpdated="True" MinimumLength="10" MaximumLength="10" ErrorMessage="CPR nummer ikke gyldigt" /&gt; &lt;/Binding.ValidationRules&gt; &lt;/Binding&gt; &lt;/TextBox.Text&gt; &lt;/TextBox&gt; </code></pre> <p>Right now my binding property is just named name, I've tried to make it bind to the CreateUserCPRTextbox.Text but it doesn't work. How does this work?</p>
 

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