App_Code/DBClass.cs

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


/// <summary>
/// DBClass 的摘要说明
/// </summary>
public class DBClass
{

	public DBClass()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}
    /// <summary>
    /// 数据库连接
    /// </summary>
    /// <returns>SqlConnection对象</returns>
    public SqlConnection GetConnection()
    {
        string myStr = ConfigurationManager.AppSettings["ConnectionString"].ToString();
        SqlConnection myConn = new SqlConnection(myStr);
        return myConn;
    }
    /// <summary>
    /// 修改用户信息
    /// </summary>
    /// <param name="P_str_userid">用户编号</param>
    public void UpdateUserInfo(string P_str_userid)
    {
        SqlConnection myConn = GetConnection();
        SqlCommand myCmd = new SqlCommand("Proc_UpdateUserLTInfo", myConn);
        myCmd.CommandType = CommandType.StoredProcedure;
        //添加参数
        SqlParameter userId = new SqlParameter("@userid", SqlDbType.NVarChar, 50);
        userId.Value = P_str_userid;
        myCmd.Parameters.Add(userId );
        //执行过程
        myConn.Open();
        try
        {
            myCmd.ExecuteNonQuery();
        }
        catch
        {
            myCmd.Dispose();
            myConn.Close();

        }