可以访问验证程序以检查其状态。您的代码示例使用MultiValidationBehavior及其子行为（TextValidationBehavior和CharactersValidationBehavior）。
使用条目的Behaviors集合，可以访问MultiValidationBehavior及其子行为。通过迭代Behaviors集合并查找MultiValidationBehavior行为，可以检索MultiValidationBehavior。MultiValidationBehavior具有一个Children属性，可用于检索其子行为。以下是访问MultiValidationBehavior及其子行为的方法。

// Find the MultiValidationBehavior in the Entry's Behaviors collection
MultiValidationBehavior multiValidationBehavior = null;
foreach (var behavior in myEntry.Behaviors)
{
    if (behavior is MultiValidationBehavior multiBehavior)
    {
        multiValidationBehavior = multiBehavior;
        break;
    }
}

// Check the state of the MultiValidationBehavior and its Child Behaviors
if (multiValidationBehavior != null)
{
    // Check the state of the MultiValidationBehavior
    bool isValid = multiValidationBehavior.IsValid;
    string errorMessage = multiValidationBehavior.ErrorMessage;

    // Check the state of the Child Behaviors
    foreach (var childBehavior in multiValidationBehavior.Children)
    {
        if (childBehavior is TextValidationBehavior textBehavior)
        {
            int minimumLength = textBehavior.MinimumLength;
            // Check other properties of the TextValidationBehavior
        }
        else if (childBehavior is CharactersValidationBehavior charBehavior)
        {
            CharacterType characterType = charBehavior.CharacterType;
            int maximumCharacterCount = charBehavior.MaximumCharacterCount;
            // Check other properties of the CharactersValidationBehavior
        }
        
    }
}

myValidator.IsValid在if语句的条件中有效

// Find the MultiValidationBehavior in the Entry's Behaviors collection
MultiValidationBehavior multiValidationBehavior = 
myEntry.Behaviors.OfType<MultiValidationBehavior>().FirstOrDefault();

// Check if the MultiValidationBehavior is valid
if (multiValidationBehavior?.IsValid == true)
{
    // MultiValidationBehavior is valid, do something here
}