Teacher/AddZhScore.aspx.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;
using System.Data.SqlClient;

public partial class AddZhScore : System.Web.UI.Page
{
    Alert alert = new Alert();
    data data = new data();
    data mydata = new data();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            DropDownList3.DataSource = mydata.GetDataReader("select a.* from  student a inner join SelectCourse b on b.Stuid=a.xuehao  where  courseid in(select id from course where teacherID='" + Session["id"].ToString() + "')");
            DropDownList3.DataTextField = "xuehao";
            DropDownList3.DataValueField = "username";
            DropDownList3.DataBind();
            string geshu = data.ReturnSql("select count(*) from StScore where StXueHao='" + DropDownList3.SelectedValue + "'");

            SqlDataReader dr1 = data.GetDataReader("select sum(Score) as zScore from StScore where StXueHao='" + DropDownList3.SelectedValue + "'  ");
           

            if (!string.IsNullOrEmpty(Request.QueryString["xuehao"]))
            {

                SqlDataReader dr = data.GetDataReader("select * from StZHScore where StXueHao='" + Request.QueryString["xuehao"].ToString() + "'  ");
                if (dr.Read())
                {
                    TextBox1.Text = dr["PDScore"].ToString();
                    TextBox2.Text = dr["XXScore"].ToString();
                    TextBox3.Text = dr["FJScore"].ToString();
                    TextBox4.Text = dr["IsChk"].ToString();
                    double a = float.Parse(TextBox1.Text) + float.Parse(TextBox3.Text)  + float.Parse(TextBox2.Text) ;
                    TextBox5.Text = a.ToString("0");
                    LinkButton1.Text = "修改";
                }
                else
                {

                }
            }

        }
    }

    protected void LinkButton1_Click(object sender, EventArgs e)
    {
        if (string.IsNullOrEmpty(Request.QueryString["xuehao"]))
        {
            string bj = null;
            SqlDataReader drs = data.GetDataReader("select * from Teacher where xuehao='" + DropDownList3.SelectedValue + "'");
            if (drs.Read())
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