将一个的datatable绑定到下拉框，指定显示某列的数据

cbx.DataSource = null;DataSet dsJH = new DataSet();OperatePort.Operate_Block("select", 0, qkmc, "", 1, 1, "", out dsJH);if (!Common.JudgeDs(dsJH)){    cbx.DataSource = dsJH.Tables[0];    cbx.DisplayMember = "井号";}

private void btnOpenfile_Click(object sender, EventArgs e)        {            OpenFileDialog odlgTxt = new OpenFileDialog();            odlgTxt.Title = "请选择文件";            odlgTxt.Filter = "文本文件(*.txt)|*.TXT";            if (odlgTxt.ShowDialog() == DialogResult.OK)            {                string file = odlgTxt.FileName;                string str = File.ReadAllText(file, System.Text.Encoding.GetEncoding("gb2312"));                txtJH.Text = str;            }        }

 中问的逗号是两个char，用foreach遍历时，是两个，会影响前面的字符组成的字符串。英文的逗号是一个char，

string jHAll = txtJH.Text.Trim().Replace('，',',');                string jing = "";                foreach (char jh in jHAll)                {                   //if (jh != '，'|jh != ',')                    if (jh != ',')                    {                        jing += jh.ToString();                    }                    if (jh == ',')                    {                     }

string jHAll = txtJH.Text.Trim().Replace('，',',');                string[] jhs = jHAll.Split(',');                string jing = "";                foreach (string jh in jhs)                {　　　　　　　　　　}