十六进制的数转换成字符串

数据库的数据如下：

id

calldate

md5

monid

result

poptype

cnt

2

2008-11-28 0:00:00

11ssseewwd

1

0

0

400

通过Sql转换成十六进制：

 select CallDate,convert(varbinary,Monid)monid,convert(varbinary,Result) result,PopType,sum(Cnt)
 from table1

 group by CallDate,Monid,Result,PopType order by CallDate,Monid,Result

得到的数据如下：

2008-11-28 00:00:00.000 0x00000001 0x00000000 0 400

要把0x00000001显示到GridView里，需进行转换，如下：

dt为DataTable，是查询的结果。

       for (int i = 0; i < dt.Rows.Count; i++)
        {
                    

           byte[] obj = (byte[])dt.Rows[i]["monid"];

            StringBuilder sbmonid = new StringBuilder();
            foreach (byte b in obj)
            {
                sbmonid.Append(b > 15 ? Convert.ToString(b, 16) : '0' + Convert.ToString(b, 16));
            }

            dt.Rows[i]["monidBin"] = "0x" + sbmonid.ToString();

            byte[] objresult = (byte[])dt.Rows[i]["result"];

            StringBuilder sbresult = new StringBuilder();
            foreach (byte b in objresult)
            {
                sbresult.Append(b > 15 ? Convert.ToString(b, 16) : '0' + Convert.ToString(b, 16));
            }

            dt.Rows[i]["resultBin"] = "0x" + sbresult.ToString();

                     
        }