MemberManagement/Common/Helper.cs

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using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MemberManagement.Common
{
    public class Helper
    {
        /// <summary>
        /// 获取Web.Config中的AppSetting中节点的值
        /// </summary>
        /// <param name="key">AppSetting中节点键</param>
        /// <param name="defValue">默认值</param>
        /// <returns></returns>
        public static string GetAppSettingValue(string key, string defValue = null)
        {
            if (string.IsNullOrEmpty(key)) return defValue;
            var value = ConfigurationManager.AppSettings[key];
            if (string.IsNullOrEmpty(value)) return defValue;
            return value;
        }

        /// <summary>
        /// 获取Web.Config中的AppSetting中节点的值
        /// </summary>
        /// <param name="key">AppSetting中节点键</param>
        /// <param name="defValue">默认值</param>
        /// <returns></returns>
        public static void SetAppSettingValue(string key, string value)
        {
            ConfigurationManager.AppSettings[key] = value;
        }

        public static string GetSystemTitle()
        {
            return GetAppSettingValue(ConstKey.SystemTitle, "会员管理系统v1.0");
        }

        /// <summary>
        /// 输出数据到Excel
        /// </summary>
        /// <param name="data">数据</param>
        /// <param name="columns">列字段以及列名</param>
        /// <param name="savePath">保存路径</param>
        /// <returns>成功TRUE/失败FALSE</returns>
        public static bool ExportExcel<T>(List<T> data,Dictionary<string,string> columns,string savePath)
        {
            bool succeed = true;
            try
            {
                ClearStyle();