PEIS/DcmToPng/Utils/DAOHelp.cs

#region CopyRight

/****************************************************************
 * Project：健康体检信息管理系统（PEIS）
 * Author：张剑峰
 * CLR Version：4.0.30319.42000
 * CreateTime：2023-05-01 14:43:04
 * Version：v2.0
 *
 * Description：
 *
 * History：
 *
*****************************************************************
 * Copyright @ 云南新八达科技有限公司 2023 All rights reserved
*****************************************************************/

#endregion CopyRight

using PEIS.Utils;
using System.Data;
using System.Data.SqlClient;
using System.Diagnostics;
using System.Reflection;
using DcmToPng.Helper;

namespace DicomTool.Utils
{
    /*
        * 操作数据库的方法
        * 约定:
        * 1)对象属性必须有public string TableName
        * 2)属性名与字段名一样。
        * 3)主键属性需标记自定义特性KeyFlagAttribute，表示此属性是数据表中的主键
        * 4)数据表中每个表必须设有主键
        */

    public class DAOHelp
    {
        #region 属性

        /// <summary>
        /// 数据库连接字符串
        /// </summary>

        #endregion 属性

        #region 数据库增、删、改、查

        public static DataTable GetDataBySql(string sql)
        {
            DateTime startTime = DateTime.Now;
            DataTable dt = new DataTable();
            using (SqlConnection conn = new SqlConnection(Constant.ConnectionString))
            {
                try
                {
                    conn.Open();
                    SqlCommand cmd = new SqlCommand(sql, conn);
                    cmd.CommandTimeout = Convert.ToInt32(60);
                    SqlDataAdapter adapter = new SqlDataAdapter(cmd);

                    foreach (DataColumn column in dt.Columns)
                    {
                        if (column.DataType == typeof(string))
                        {
                            column.DefaultValue = string.Empty;
                        }
                    }

                    adapter.Fill(dt);
                }
                catch (Exception e)
                {
                    Debug.WriteLine("GetDataBySQL异常：" + sql + "," + e.Message);
                    Console.WriteLine("数据库连接失败，请检查网络，或联系管理员！" + e.Message);
                }
            }

            // 数据库连接池
            //DBConnectionSingletion pool = DBConnectionSingletion.Instance;
            //DBConnectionSingletion.ConnectionString = connectionString;
            //SqlConnection conn = pool.BorrowDBConnection();
            //SqlCommand cmd = new SqlCommand(sql, conn);
            //SqlDataAdapter adapter = new SqlDataAdapter(cmd);
            //adapter.Fill(dt);
            //pool.ReturnDBConnection(conn);

            //Global.CostTime("conn.Open", StartTime);

            return dt;
        }

        /// <summary>
        /// 执行非查询SQL
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static int ExecuteSql(String sql, Boolean startTrans = false)
        {
            //sql = sql.ToUpper();
            Debug.WriteLine("执行SQL=>" + sql);
            int n = 0;//影响的行数
            DateTime StartTime = DateTime.Now;
            DataTable dt = new DataTable();
            using (SqlConnection conn = new SqlConnection(Constant.ConnectionString))
            {
                if (startTrans)
                {
                    SqlTransaction trans = null;
                    try
                    {
                        conn.Open();
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine("数据库连接失败，请检查网络，或联系管理员！" + e.Message);
                    }
                    try
                    {
                        trans = conn.BeginTransaction();
                        SqlCommand cmd = new SqlCommand(sql, conn);
                        cmd.CommandTimeout = Convert.ToInt32(60);
                        n = cmd.ExecuteNonQuery();
                        trans.Commit();
                    }
                    catch
                    {
                        trans.Rollback();
                        Debug.WriteLine(sql);
                        Console.WriteLine("SQL执行错误！");
                    }
                }
                else
                {
                    try
                    {
                        conn.Open();
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine("数据库连接失败，请检查网络，或联系管理员！" + e.Message);
                    }
                    try
                    {
                        SqlCommand cmd = new SqlCommand(sql, conn);
                        n = cmd.ExecuteNonQuery();
                    }
                    catch
                    {
                        Debug.WriteLine(sql);
                        Console.WriteLine("SQL执行错误！");
                    }
                }
            }
            return n;
        }

        public static List<T> GetDataBySQL<T>(String sql) where T : class, new()
        {
            Debug.WriteLine("执行SQL=>" + sql);
            Type type = typeof(T);
            List<T> list = new List<T>();
            DataTable dt = GetDataBySql(sql.ToUpper());

            foreach (DataRow row in dt.Rows)
            {
                PropertyInfo[] pArray = type.GetProperties();
                T entity = new T();
                foreach (PropertyInfo p in pArray)
                {
                    if (dt.Columns.IndexOf(p.Name) == -1)
                    {
                        continue;
                    }
                    if (p.Name == "TableName")
                    {
                        continue;
                    }
                    else
                    {
                        if (row[p.Name] is String)
                        {
                            p.SetValue(entity, row[p.Name], null);
                            continue;
                        }
                        if (row[p.Name] is Int32)
                        {
                            p.SetValue(entity, Convert.ToInt32(row[p.Name]), null);
                            continue;
                        }
                        if (row[p.Name] is Int64)
                        {
                            p.SetValue(entity, Convert.ToInt64(row[p.Name]), null);
                            continue;
                        }
                        if (row[p.Name] is DateTime)
                        {
                            p.SetValue(entity, Convert.ToDateTime(row[p.Name]), null);
                            continue;
                        }
                        if (row[p.Name] is byte[])
                        {
                            //Image image = Global.BytesToImage((byte[])row[p.Name]);
                            p.SetValue(entity, row[p.Name], null);
                            continue;
                        }
                        if (row[p.Name] is DBNull)
                        {
                            if (p.PropertyType.Name == "Int64" || p.PropertyType.Name == "Int32")
                            {
                                p.SetValue(entity, 0, null);
                                continue;
                            }
                            else if (p.PropertyType.Name == "Decimal")
                            {
                                p.SetValue(entity, Convert.ToDecimal(0), null);
                                continue;
                            }
                            else if (p.PropertyType.Name == "Boolean")
                            {
                                p.SetValue(entity, false, null);
                                continue;
                            }
                            else if (p.PropertyType.Name == "Image" || p.PropertyType.Name == "Byte[]")
                            {
                                p.SetValue(entity, null, null);
                                continue;
                            }
                            else
                            {
                                p.SetValue(entity, null, null);
                            }
                            continue;
                        }
                        //object[] attrs = p.GetCustomAttributes(false);
                        //if (attrs.Count() > 0)
                        //{
                        //    if (attrs[0].GetType().Name.Equals("RefFlagAttribute"))
                        //    {
                        //        if (attrs.Count() == 1)
                        //            continue;
                        //    }
                        //}
                        p.SetValue(entity, row[p.Name], null);
                    }
                }
                list.Add(entity);
            }
            return list;
        }

        #endregion 数据库增、删、改、查
    }
}