38 lines
1.3 KiB
C#
38 lines
1.3 KiB
C#
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using System.Globalization;
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using System.Reflection;
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using System.Windows.Controls;
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using System.Windows.Data;
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namespace ValidationLibrary
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{
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public class AttributeValidator : ValidationRule
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{
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public BindingExpression ExpressionToValidate { get; set; }
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public override ValidationResult Validate(object pValue, CultureInfo pCultureInfo)
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{
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bool lValid = true;
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if (ExpressionToValidate != null)
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{
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PropertyInfo lPropInfo = null;
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object lCurrentObject = ExpressionToValidate.DataItem;
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foreach (string iPropName in ExpressionToValidate.ParentBinding.Path.Path.Split('.'))
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{
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lPropInfo = lCurrentObject.GetType().GetProperty(iPropName);
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lCurrentObject = lPropInfo.GetValue(lCurrentObject, null);
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}
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object[] lAttributes = lPropInfo.GetCustomAttributes(typeof (ValidationAttribute), true);
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if (lAttributes.Length > 0)
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{
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lValid = ((ValidationAttribute) lAttributes[0]).Validate(pValue);
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}
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}
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// TODO: Nachricht, am besten als Property im ValidationAttribut
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return new ValidationResult(lValid, null);
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}
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}
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}
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