根据数据库帮助类采用事务插入图片到sql server数据库中

我们定义数据库为image类型，然后读取图片为字符流，再保存到数据库中，首先我们定义一个读取图片的公共类，此公共类以后会用到，所以可以建立相应的帮助类

 public static byte[] ReadFile(string sPath)
        {
            //Initialize byte array with a null value initially.
            byte[] data = null;

            //Use FileInfo object to get file size.
            FileInfo fInfo = new FileInfo(sPath);
            long numBytes = fInfo.Length;

            //Open FileStream to read file
            FileStream fStream = new FileStream(sPath, FileMode.Open, FileAccess.Read);

            //Use BinaryReader to read file stream into byte array.
            BinaryReader br = new BinaryReader(fStream);

            //When you use BinaryReader, you need to supply number of bytes to read from file.
            //In this case we want to read entire file. So supplying total number of bytes.
            data = br.ReadBytes((int)numBytes);
            return data;
        }

　　再定义一下插入图片的语句类

    /// <summary>
        /// 保存图片数据库语句
        /// WZW
        /// 2018-10-09 17：11
        /// </summary>
        /// <param name="ImageData"></param>
        /// <param name="BUitrasoundID"></param>
        /// <param name="currentid"></param>
        /// <param name="parameter"></param>
        /// <returns></returns>
        private StringBuilder SaveImg(byte[] ImageData, string BUitrasoundID,int currentid,out SqlParameter parameter)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("insert into imagetabel(");
            strSql.Append("ImageData,Time,Type,ImageType,ReferenceID)");
            strSql.Append(" values (");
            strSql.Append("@ImageData"+currentid+",'" + System.DateTime.Now + "',1,0,@BSID) ");
            parameter = new SqlParameter("@ImageData" + currentid, ImageData);
            return strSql;

        }

　　主体代码如下

StringBuilder strSql = new StringBuilder();
            Random random=new Random();
            SqlCommand command = new SqlCommand();
            SqlParameter[] parameters = new SqlParameter[3];
            strSql.Append("set XACT_ABORT ON ");
            strSql.Append(" begin tran t1 ");
            StringBuilder strSql2 = new StringBuilder();
            strSql.Append(" declare @BSID int ");
            strSql2.Append("insert into table(");
            strSql2.Append("ID,CheckResult,TestTime,Result,Picture,Type)");
            strSql2.Append(" values (");
            strSql2.Append("'" + ID + "','" +CheckResult + "','" + TestTime + "','" + FeaturesResult + "','" +BUltrasoundPicture + "','" + BUitrasoundType + "') ");
            strSql2.Append(";select @BSID=@@IDENTITY ");
            strSql.Append(strSql2);
            if (ImageData != null)
            {
                SqlParameter parameter = null;
                strSql.Append(SaveImg(ImageData," ",1, out parameter));
                parameters[0] = parameter;
            }
                        if (ImageData2 != null)
                             {
                SqlParameter parameter = null;
                            strSql.Append(SaveImg(ImageData2, " ",2, out parameter));
                              parameters[1] = parameter;
            }
                        if (ImageData3 != null)
                             {
                SqlParameter parameter = null;
                            strSql.Append(SaveImg(ImageData3," ",3, out parameter));
                              parameters[2] = parameter;
            }
            strSql.Append("commit tran t1");
            return Convert.ToInt32(SqlHelper.ExecuteNonQuery(SqlHelper.connectionString, CommandType.Text, strSql.ToString(),parameters));

　　其中图片表的关联id关联主表插入后的id，由语句select @BSID=@@IDENTITY得到，当主键自增时此语句才生效。