●c#使用正则表达式

using System.Text.RegularExpressions;

            string drugComment = "药品价格及供应商:1.3,0001,药品供应商; 其他";  //字符串格式示例：价格，供应商代码，供应商名称
            
//正则截取
            Regex regSupply = new Regex(@"供应商代码（d*）");  //定义供应商正则表达式
            Match matSupply = regSupply.Match(drugComment);  //根据正则表达式，从字符串中截取供应商信息

            string matSupplyCode = matSupply.Groups[0].ToString();
            if (matSupplyCode.Length > 7)  //如果有供货商代码，需要验证
            {
                string strSupplyCode = matSupplyCode.Substring(6, matSupplyCode.Length - 7);  //截取供应商代码
            }
            else
                new CustMsgBoxWindow().Show(msg: "区域药品备注中无供应商代码！");
                    
//正则匹配
            Regex reg = new Regex(@"^药品价格及供应商:(d{1,}.d{1,}|d{1,}),d{1,},S{1,};"); //用正则表达式验证药品备注中的进价及供应商格式
            if (reg.IsMatch(drugComment))
            {
                string strYPBZ = drugComment.Substring(drugComment.IndexOf(";") + 1);
                string strPriceAddSupply = drugComment.Substring(drugComment.IndexOf(":") + 1, drugComment.IndexOf(";") - drugComment.IndexOf(":") - 1);
                string[] strPAS = strPriceAddSupply.Split(',');
            }
            else
                tbYPBZ.Text = drugComment;

//正则替换
            Regex reg = new Regex(@"^药品价格及供应商((d*.d*|d*),d*,S*);"); //用正则表达式验证药品备注中的进价及供应商格式
            if (reg.IsMatch(strYPBZ))
                strYPBZ = reg.Replace(strYPBZ, strPriceAddSupply);  //strPriceAddSupply替换strYPBZ中符合格式的字符串片段
            else
                strYPBZ = strPriceAddSupply + "  " + strYPBZ;

            tbYPBZ.Text = strYPBZ;