Admins/AttendCount.aspx.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

public partial class Admins_AttendCount : System.Web.UI.Page
{
    DB db = new DB();
    string sql;
    protected void Page_Load(object sender, EventArgs e)
    {

        if (!IsPostBack)
        {
            //绑定系部
            string sql = "select * from Department";
            DataTable dt = db.reDt(sql);
            depart.DataSource = dt;
            depart.DataTextField = "DepartName";
            depart.DataValueField = "DepartID";
            depart.DataBind();
            depart.Items.Insert(0, new ListItem("==请选择==", ""));

            //绑定专业
            //sql = "select * from Special";
            //dt = db.reDt(sql);
            //special.DataSource = dt;
            //special.DataTextField = "SpeciName";
            //special.DataValueField = "SpeciID";
            //special.DataBind();
            special.Items.Insert(0, new ListItem("==请选择==", ""));

            //绑定班级
            //sql = "select * from Class";
            //dt = db.reDt(sql);
            //Class.DataSource = dt;
            //Class.DataTextField = "ClassName";
            //Class.DataValueField = "ClassID";
            //Class.DataBind();
            Class.Items.Insert(0, new ListItem("==请选择==", ""));

            //查考勤类型
            sql = "select * from AttendType";
            dt = db.reDt(sql);
            AttendType.DataSource = dt;
            AttendType.DataTextField = "TypeName";
            AttendType.DataValueField = "TypeID";
            AttendType.DataBind();
            AttendType.Items.Insert(0, new ListItem("--请选择--", ""));

        }
    }
    protected void depart_SelectedIndexChanged(object sender, EventArgs e)
    {

       
        if (depart.SelectedValue != "")