Share an example of ASP.NET database operation class

This article mainly introduces the ASP.NET database operation class, and analyzes the basic encapsulation skills of asp.net's basic database addition, deletion, modification and query operations in the form of examples. Friends in need can refer to the following

Example descriptions in this article ASP.NET database operation class. Share it with everyone for your reference, the details are as follows:

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;
namespace Mysqlserver
{
  /// <summary>
  /// SqlServerDataBase 的摘要说明
  /// </summary>
  public class SqlServerDataBase
  {
    private string strError = null;
    private int intCount = 0;
    public SqlServerDataBase()
    {
      //
      // TODO: 在此处添加构造函数逻辑
      //
    }
    /// <summary>
    /// 公开方法DBConn，返回数据库连接
    /// </summary>
    /// <returns></returns>
    public SqlConnection DBconn()
    {
      string strConn = "Server=(local);Database=GlobalMeetings;Uid=sa;pwd=";
      try
      {
        return new SqlConnection(strConn);
      }
      catch (Exception)
      {
        return null;
      }
    }
    /// <summary>
    /// 公开属性ErrorMessage，返回错误信息
    /// </summary>
    public string ErrorMessage
    {
      get
      {
        return strError;
      }
    }
    /// <summary>
    /// 根据查询语句从数据库检索数据
    /// </summary>
    /// <param name="strSelect">查询语句</param>
    /// <param name="SqlConn">数据库连接</param>
    /// <returns>有数据则返回DataSet对象，否则返回null</returns>
    public DataSet Select(string SelectString, SqlConnection sqlConn)
    {
      strError = "";
      SqlConnection conn;
      if (sqlConn == null)
      {
        conn = DBconn();
      }
      else
      {
        conn = sqlConn;
      }
      try
      {
        //若数据库连接的当前状态是关闭的，则打开连接
        if (conn.State == ConnectionState.Closed)
        {
          conn.Open();
        }
        SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
        SqlCommand selectCommand = new SqlCommand(SelectString, conn);
        selectCommand.CommandType = CommandType.Text;
        mySqlDataAdapter.SelectCommand = selectCommand;
        DataSet myDS = new DataSet();
        mySqlDataAdapter.Fill(myDS);
        return myDS;
      }
      catch (Exception e)
      {
        strError = "数据检索失败：" + e.Message;
        return null;
      }
      finally
      {
        if (conn.State != ConnectionState.Closed)
        {
          conn.Close();
        }
      }
    }
    /// <summary>
    /// 更新数据库
    /// </summary>
    /// <param name="UpdateString">Update Sql语句</param>
    /// <param name="SqlConn">数据库连接</param>
    /// <returns>更新成功返回true</returns>
    public bool Update(string UpdateString, SqlConnection SqlConn)
    {
      return udiDataBase(UpdateString, SqlConn);
    }
    /// <summary>
    /// 从数据库中删除数据
    /// </summary>
    /// <param name="DeleteString">Delete Sql语句</param>
    /// <param name="SqlConn">数据库连接</param>
    /// <returns>删除成功返回true</returns>
    public bool Delete(string DeleteString, SqlConnection SqlConn)
    {
      return udiDataBase(DeleteString, SqlConn);
    }
    /// <summary>
    /// 把数据插入数据库
    /// </summary>
    /// <param name="InsertString">Insert Sql语句</param>
    /// <param name="SqlConn">数据库连接</param>
    /// <returns>插入成功返回true</returns>
    public bool Insert(string InsertString, SqlConnection SqlConn)
    {
      return udiDataBase(InsertString, SqlConn);
    }
    /// <summary>
    /// 根据Sql语句更新数据库
    /// </summary>
    /// <param name="UDIString">更新语句</param>
    /// <param name="SqlConn">数据库连接</param>
    /// <returns>更新成功则返回true</returns>
    public bool udiDataBase(string UDIString, SqlConnection SqlConn)
    {
      strError = "";
      SqlConnection conn;
      if (SqlConn == null)
      {
        conn = DBconn();
      }
      else
      {
        conn = SqlConn;
      }
      try
      {
        if (conn.State == ConnectionState.Closed)
        {
          conn.Open();
        }
        SqlCommand cmd = new SqlCommand(UDIString, conn);
        cmd.CommandType = CommandType.Text;
        intCount = cmd.ExecuteNonQuery();
        return !(intCount < 1);
      }
      catch (Exception e)
      {
        strError = "更新数据库失败：" + e.Message;
        return false;
      }
      finally
      {
        if (conn.State != ConnectionState.Closed)
        {
          conn.Close();
        }
      }
    }
  }
}

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