App_Code/DataCode.cs

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using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;

/// <summary>
///DataCode 的摘要说明
/// </summary>

    public class DataCode
    {
        public DataCode()
        {
            //
            //TODO: 在此处添加构造函数逻辑
            //
        }
        #region 定义连接字符串


        /// <summary>
        /// 定义连接字符串
        /// </summary>
        /// <returns></returns>
        public SqlConnection getcon()
        {
            //string zhang = "Data Source=(local);DataBase=db_Examination;User Id=sa;Pwd=123";
            string zhang = ConfigurationManager.ConnectionStrings["db_Examination_DataConnectionString"].ConnectionString;
            SqlConnection wei = new SqlConnection(zhang);
            return wei;
        }
        #endregion

        #region 数据的操作


        /// <summary>
        /// 数据的操作
        /// </summary>
        /// <param name="strcon"></param>
        /// <returns></returns>
        public bool dataos(string strcon)
        {
            SqlConnection con = this.getcon();
            con.Open();
            SqlCommand strcom = new SqlCommand(strcon, con);
            try
            {
                strcom.ExecuteNonQuery();
                return true;
            }
            catch