ColumnAttribute.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.ComponentModel.DataAnnotations.Schema;
 
[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false)]
public class ColumnAttribute : Attribute
{
    private int _order = -1;
 
    private string _typeName;
 
    public string? Name { get; }
 
    public int Order
    {
        get
        {
            return _order;
        }
        set
        {
            if (value < 0)
            {
                throw new ArgumentOutOfRangeException("value");
            }
            _order = value;
        }
    }
 
    public string? TypeName
    {
        get
        {
            return _typeName;
        }
        [param: DisallowNull]
        set
        {
            if (string.IsNullOrWhiteSpace(value))
            {
                throw new ArgumentException(System.SR.Format(System.SR.ArgumentIsNullOrWhitespace, "value"), "value");
            }
            _typeName = value;
        }
    }
 
    public ColumnAttribute()
    {
    }
 
    public ColumnAttribute(string name)
    {
        if (string.IsNullOrWhiteSpace(name))
        {
            throw new ArgumentException(System.SR.Format(System.SR.ArgumentIsNullOrWhitespace, "name"), "name");
        }
        Name = name;
    }
}