c# 操作mssql数据库 含有带参数sql语句运行

<?xml version="1.0" encoding="utf-8"?>
<configuration>
 <appSettings>
  <add key="Default" value="Default" />
 </appSettings>
 <connectionStrings>
  <add name="Default" connectionString="Data Source=192.168.1.197;User ID=diamond;Password=88888888;Initial Catalog=EmailAnalyse" providerName="System.Data.SqlClient" />
 </connectionStrings>
</configuration>
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Text;
namespace OfficeOutlook
{
    /// <summary>
    ///DataBase 的摘要说明
    /// </summary>
    public class DataBase
    {
        protected SqlConnection BaseSqlConnection = new SqlConnection();//连接对象
        protected SqlCommand BaseSqlCommand = new SqlCommand();  //命令对象
        public DataBase()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
        protected void OpenConnection()
        {
            if (BaseSqlConnection.State == ConnectionState.Closed)  //连接是否关闭
                try
                {
           &nb