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MyUtil
using System;

namespace Bruce.Lib
{
    public class BUtil
    {
        /// <summary>
        /// 測試參數中是否含有null或空值
        /// </summary>
        /// <param name="data">任意物件</param>
        /// <returns>含有null、DBNull或空值則為true,反之為false</returns>
        public static bool ContainsNullOrEmpty(params object[] data)
        {
            foreach (object d in data)
            {
                if (d == null || d == DBNull.Value || string.IsNullOrEmpty(d.ToString()))
                    return true;
            }
            return false;
        }
        /// <summary>
        /// 將任意物件轉成字串,免去再判斷null或DBNull的處理
        /// </summary>
        /// <param name="data">任意物件</param>
        /// <returns></returns>
        public static string StringValue(object data)
        {
            return data == null || data == DBNull.Value ? string.Empty : Convert.ToString(data);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="data"></param>
        /// <param name="length"></param>
        /// <returns></returns>
        public static string Summary(object data, int length)
        {
            if (length < 1) throw new ArgumentException();
            string str = StringValue(data);
            return str.Length > length ? str.Substring(0, length) + "..." : str;
        }
    }
}
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