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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