DbConnectionStringBuilderDescriptor.cs

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using System.ComponentModel;
 
namespace System.Data.Common;
 
internal sealed class DbConnectionStringBuilderDescriptor : PropertyDescriptor
{
    internal bool RefreshOnChange { get; }
 
    public override Type ComponentType { get; }
 
    public override bool IsReadOnly { get; }
 
    public override Type PropertyType { get; }
 
    internal DbConnectionStringBuilderDescriptor(string propertyName, Type componentType, Type propertyType, bool isReadOnly, Attribute[] attributes)
        : base(propertyName, attributes)
    {
        ComponentType = componentType;
        PropertyType = propertyType;
        IsReadOnly = isReadOnly;
    }
 
    public override bool CanResetValue(object component)
    {
        if (component is DbConnectionStringBuilder dbConnectionStringBuilder)
        {
            return dbConnectionStringBuilder.ShouldSerialize(DisplayName);
        }
        return false;
    }
 
    public override object GetValue(object component)
    {
        if (component is DbConnectionStringBuilder dbConnectionStringBuilder && dbConnectionStringBuilder.TryGetValue(DisplayName, out object value))
        {
            return value;
        }
        return null;
    }
 
    public override void ResetValue(object component)
    {
        if (component is DbConnectionStringBuilder dbConnectionStringBuilder)
        {
            dbConnectionStringBuilder.Remove(DisplayName);
            if (RefreshOnChange)
            {
                dbConnectionStringBuilder.ClearPropertyDescriptors();
            }
        }
    }
 
    public override void SetValue(object component, object value)
    {
        if (component is DbConnectionStringBuilder dbConnectionStringBuilder)
        {
            if (typeof(string) == PropertyType && string.Empty.Equals(value))
            {
                value = null;
            }
            dbConnectionStringBuilder[DisplayName] = value;
            if (RefreshOnChange)
            {
                dbConnectionStringBuilder.ClearPropertyDescriptors();
            }
        }
    }
 
    public override bool ShouldSerializeValue(object component)
    {
        if (component is DbConnectionStringBuilder dbConnectionStringBuilder)
        {
            return dbConnectionStringBuilder.ShouldSerialize(DisplayName);
        }
        return false;
    }
}