MemberManagement/FrmParameter.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MemberManagement
{
    public partial class FrmParameter : Form
    {
        private member Member;

        public FrmParameter()
        {
            InitializeComponent();
        }

        private void FrmRecharge_Load(object sender, EventArgs e)
        {
            this.GetParam();
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            ((Button)sender).Enabled = false;
            if (this.UpdateParameter())
            {
                MessageBox.Show("参数修改成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            ((Button)sender).Enabled = true;
        }
        private bool UpdateParameter()
        {
            try
            {
                using (var db = new MemberManagementEntities())
                {
                    var amount = db.parameter.FirstOrDefault(o => o.paramName == "amount");
                    if (amount == null)
                    {
                        db.parameter.Add(new parameter()
                        {
                            paramName = "amount",
                            paramValue = this.nudAmount.Value.ToString()
                        });
                    }
                    else
                    {
                        amount.paramValue = this.nudAmount.Value.ToString();
                    }
                    db.SaveChanges();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "操作数据失败", MessageBoxButtons.OK, MessageBoxIcon.Error);