mainMaster.master.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;

public partial  class mainMaster : System.Web.UI.MasterPage
{
    SqlData da = new SqlData();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["uname"] == null)
        {
            return;
        }
        if (!IsPostBack)
        {
            setjifen();
        }
    }

    private void setjifen()
    {
        string sql = "select integral from users where username='" + Session["uname"] + "'";
        var jf = Convert.ToInt32("" + da.ExecuteScalar(sql));
        lbljf.Text = jf + "";
    }

    protected void btnlogin_Click(object sender, EventArgs e)
    {
        string sql = "select userpname from users where username='" + this.txtuname.Text + "' and userpwd='" + this.txtupass.Text + "'";
        var f = "" + da.ExecuteScalar(sql);
        if (f == "")
        {
            Response.Write("<script>javascript:alert('验证失败！请注册后再登录');document.location=document.location;</script>");
        }
        else
        {
            Session["uname"] = txtuname.Text;

            Session["upname"] = f;
            Response.Redirect("default.aspx");
        }
    }
    protected void btnreg_Click(object sender, EventArgs e)
    {
        Response.Redirect("register.aspx");
    }

    protected void btnqd_Click(object sender, EventArgs e)
    {
        string sql = @"select count(1) from qiandao where userid = " + Session["uname"] + " and CONVERT(VARCHAR(10),ctime,121) = '" + DateTime.Now.ToString("yyyy-MM-dd") + "'";
        var count = "" + da.ExecuteScalar(sql);
        if (count != "0")
        {