using DevExpress.XtraEditors.DXErrorProvider;
using System;
using System.Windows.Forms;

namespace HL_FristAidPlatform_Public
{
    ///<summary>
    ///验证值是否存在的验证规则
    ///</summary>
    public class CustomValidationRule : ValidationRule
    {
        public CustomValidationRule(Func<object, bool> validationFunction)
        {
            this.ValidateFunction = validationFunction;
        }

        ///<summary>
        ///获取或设置验证方法
        ///</summary>
        private Func<object, bool> ValidateFunction { get; set; }

        ///<summary>
        ///验证待验证控件的值是否已存在
        ///</summary>
        ///<param name="control">待验证控件。</param>
        ///<param name="value">待验证控件的值</param>
        ///<returns>若是值已存在，返回false;不然返回true。</returns>
        public override bool Validate(Control control, object value)
        {
            if (this.ValidateFunction == null)
                throw new InvalidOperationException("必须设置ValidateFunction属性");
            return ValidateFunction(value);
        }
    }
}