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  • ASP.net Logion用户登陆验证代码

    web.config

    <configuration>

    ……

    <system.web>

           <database>

            <add key="strConn" value="server=107.120.65.99;database=DB;uid=DB;pwd=DB" />

    </database>

    </system.web>

    ……

    </configuration>


    Global.asax.cs

    protected void Session_End(Object sender, EventArgs e)

    {

            Application.Lock();

            Application.Remove(Session.SessionID.ToString());

            Application["OL_UserCount"]=(int)Application["OL_UserCount"]-1;

            Application.UnLock();

    }


    login.aspx

    <table class="logintable">

    <tr>    <td colspan="2" class="tdcaption"><font class="fcaption">ログイン</font></td></tr>

    <tr>        <td><font class="font100">ユーザーID:</font></td></tr>

            <td><asp:TextBox CssClass="itxt" ID="txtName" Runat="server"></asp:TextBox></td></tr>

    <tr>        <td><font class="font100">パスワード:</font></td>

            <td><asp:TextBox CssClass="itxt" ID="txtPwd" TextMode="Password" Runat="server"></asp:TextBox></td></tr>

    <tr>        <td><asp:Button CssClass="ibutton" ID="btnSubmit" Text="login" Runat="server"></asp:Button></td>

            <td><input type="reset" class="ibutton" name="btnReset" value="reset"></td></tr>

    </table>


    login.aspx.cs

    using System.Collections.Specialized;

    using System.Data.SqlClient;

    public void LoginBySQL()

    {

         string strConn=(String) ((NameValueCollection) Context.GetConfig("system.web/database"))["strConn"];

         using (SqlConnection conn = new SqlConnection(strConn))

         {

             SqlCommand cmd = new SqlCommand("sp_IDPWD",conn);

             cmd.CommandType=CommandType.StoredProcedure;    //这里采用存储过程

             cmd.Parameters.Add("@ID",SqlDbType.VarChar,20);

             cmd.Parameters.Add("@PWD",SqlDbType.VarChar,20);

             cmd.Parameters["@ID"].Value=txtName.Text;

             cmd.Parameters["@PWD"].Value=txtPwd.Text;

             conn.Open();

             using (SqlDataReader dr = cmd.ExecuteReader())

             {

                 if(dr.Read())

                 {

                    bool NotOL=true;

                    for(int i=0;i<Application.Count;i++)

                    {

                       if(Application[Application.GetKey(i).ToString()].ToString()==dr["UserID"].ToString())

                       NotOL=false;

                    }

                    if(NotOL)

                    {

                       Application[Session.SessionID.ToString()]=dr["UserID"].ToString();

                       Application["OL_UserCount"]=(int)Application["OL_UserCount"]+1;


                       Session["UserName"]=dr["UserName"].ToString();//Sessions
                       Response.Redirect("./main/main.aspx");

                    }

                    else

                       message.Text="已经登陆";

                 }

                 else

                 {

                    message.Text="密码错误";

                 }

            }

        }

    }

    存储过程
    ALTER PROCEDURE dbo.sp_IDPWD
     (
      @id varchar(20),
      @pwd varchar(20)
      /*@pwd datatype OUTPUT*/
     )
    AS
     SET NOCOUNT ON
     select * from [DB].[DB].[Admin] where (UserID=@id) and ([Password]=@pwd)
     RETURN

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  • 原文地址:https://www.cnblogs.com/juan/p/1424632.html
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