下面是用C#写的ASP.NET数据库操作类:
- 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();
- }
- }
- }
- }
- }
-----------------------------
ASP.NET数据库操作类写好了,下面是两种调用方法
1、
- string strUserPsw = UserPsw.Text.Trim();
- string UserPassWord = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(strUserPsw, "MD5");//md5加密
- SqlServerDataBase obj = new SqlServerDataBase();
- obj.Insert("insert into asUserInfo (UserName,UserPassword,Question,Answer,CreateTime) values('" + UserName.Text.Trim() + "','" + UserPassword + "','" + Question.Text.Trim() + "','" + Answer.Text.Trim() + "','" + DateTime.Now.ToString() + "' )", null);
2、
- private bool IsUsernameExist(string strUsername)
- {
- bool bRet = true;
- SqlServerDataBase db = new SqlServerDataBase();
- DataSet ds = db.Select("select * from asUserInfo where UserName = '" + strUsername + "'", null);
- if (ds == null ds.Tables.Count == 0 ds.Tables[0].Rows.Count == 0)
- {
- bRet = false;
- }
- else
- {
- bRet = true;
- }
- return bRet;
- }
以上就介绍了用C#写的ASP.NET数据库类及调用方法。
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