login.aspx.cs

一个简单的聊天代码

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 login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        { popol();
       
    }

    }
  
    void popol()
    { 
        DataTable dt = Spbase.GreatDs("Select * from Spclass").Tables[0];
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            ListItem Dr = new ListItem(dt.Rows[i]["name"].ToString(), dt.Rows[i][0].ToString());
            DropDownList1.Items.Add(Dr);

        } 
    }
    protected void ImageButton_Click1(object sender, ImageClickEventArgs e)
    {
        if (TextBox_usertext.Text == "")
        {
            Sp.MessageBox.Show(this.Page,"请输入用户名！");
        }
        else if (TextBox_userpass.Text == "")
        { Sp.MessageBox.Show(this.Page, "请输入密码！"); }
        else 
        { 
            string pu, pw;
        pu = spstr.tosql(TextBox_usertext.Text);
        pw = spstr.tosql(TextBox_userpass.Text);
        string sql = "select * from usercenter where usertext='" + pu + "' and userpass='" + pw + "'";
        DataTable dt = new DataTable();
        dt = Spbase.GreatDs(sql).Tables[0];   

        if (dt.Rows.Count > 0)
        {
            Response.Write("<script language=javascript>alert('您已经成功登陆!');</script>");
            Session["memberlogin"] = "ok";
            Session["membername"] = pu;
            Session["memberpass"] = pw;

        }
        else { Response.Write("<script language=javascript>alert('非法登陆!');</script>"); }
    }
}
    protected void ImageButton2_Click(object sender, ImageClickEventArgs e)
    {
     Response.Write("<script language=javascript>top.location.href='agree.aspx';</script>");
    }
    protected void ImageButton3_Click(object sender, ImageClickEventArgs e)
    {
        string gjz, lb;
        gjz = spstr.tosql(TextBox_gjz.Text);
        lb = DropDownList1.SelectedValue;
        string url = "List.aspx?Spcs=" + lb + "&Ser=" + gjz;
        Response.Write("<script language=javascript>top.location.href='" + url + "';</script>");
        

    }
}