管道基础大数据平台系统开发-【CS】-ExportMap
13693261870
2023-01-01 dc2da375cd8b8cc7fb5cb3a3f854cf53e685da9e
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using Npgsql;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data.Common;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
 
namespace DataLoader.Model
{
    public class Tool
    {
        public static MainWindow Owner = null;
 
        public static readonly string BaseDir = AppDomain.CurrentDomain.BaseDirectory;
 
        public static int UserId = 0;
 
        public static string Uname = "";
 
        public static string Token = "";
 
        public static string FormatBytes(long bytes)
        {
            string[] Suffix = { "Byte", "KB", "MB", "GB", "TB" };
 
            int i = 0;
            double dblSByte = bytes;
            if (bytes > 1024)
                for (i = 0; (bytes / 1024) > 0; i++, bytes /= 1024)
                    dblSByte = bytes / 1024.0;
 
            return String.Format("{0:0.##}{1}", dblSByte, Suffix[i]);
        }
 
        public static string GetSetting(string key)
        {
            if (!ConfigurationManager.AppSettings.AllKeys.Contains(key))
            {
                return null;
            }
 
            return ConfigurationManager.AppSettings[key];
        }
 
        public static List<DbParameter> GetParams<T>(string sql, T t)
        {
            List<DbParameter> list = new List<DbParameter>();
            Type tType = typeof(T);
            BindingFlags flags = BindingFlags.Public | BindingFlags.IgnoreCase | BindingFlags.Instance;
 
            int start = sql.IndexOf("@");
            while (start != -1)
            {
                int end = sql.IndexOf(",", start);
                if (end == -1) end = sql.IndexOf(")", start);
                if (end == -1) end = sql.IndexOf(" ", start);
                if (end == -1) end = sql.Length;
 
                string name = sql.Substring(start + 1, end - start - 1);
                PropertyInfo pi = tType.GetProperty(name, flags);
                if (pi != null)
                {
                    object value = pi.GetValue(t, null);
                    DbParameter dp = new NpgsqlParameter("@" + name, value);
                    list.Add(dp);
                }
 
                start = sql.IndexOf("@", end);
            }
 
            return list;
        }
    }
}