将枚举定义生成SQL中的Case-When-then语句

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Text.RegularExpressions;



namespace TestPro

{

    public partial class CaseWhenSqlGeneration : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {



        }



        protected void btnOk_Click(object sender, EventArgs e)

        {

            string enumString = this.txtEnum.Text.Trim().Replace("\r\n","");

            bool useMark = this.chkUseMark.Enabled;

            string result = string.Empty;

            List<EnumInfo> enumInfos = new List<EnumInfo>();



            string regString = "(?:(?:\\s*///\\s*<summary>)\\s*///\\s*(?<mark>[\\S]*?)(?:\\s*///\\s*</summary>))*\\s*((?<key>[\\S]+)\\s*=\\s*(?<value>[\\d]+))";

            Regex regex = new Regex(regString, RegexOptions.None);



            MatchCollection matchs = regex.Matches(enumString);

            foreach (Match match in matchs)

            {

                enumInfos.Add(new EnumInfo

                {

                    Mark = match.Groups["mark"].Value,

                    Key = match.Groups["key"].Value,

                    Value = match.Groups["value"].Value

                });

            }



            foreach (var item in enumInfos)

            {

                if (this.chkUseMark.Checked)

                {

                    result += string.Format("\r\n when {0} then '{1}' ", item.Value, string.IsNullOrEmpty(item.Mark) ? item.Key : item.Mark);

                }

                else

                {

                    result += string.Format("\r\n when {0} then '{1}' ", item.Value, item.Key);

                }

            }



            if (enumInfos != null) { result += "\r\n else '未知枚举' end"; }

            this.txtResult.Text = result;

        }

    }



    public class EnumInfo

    {

        public string Mark { get; set; }

        public string Key { get; set; }

        public string Value { get; set; }

    }

}