Admins/AddSt.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;
using System.IO;

public partial class Admins_AddSt : System.Web.UI.Page
{
    DB db = new DB();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {

            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--", ""));

            //查专业
            //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--", ""));
            //查考勤类型

            //查学生
            //sql = "select * from Users";
            //dt = db.reDt(sql);
            //Users.DataSource = dt;
            //Users.DataTextField = "UserName";
            //Users.DataValueField = "UserID";
            //Users.DataBind();
        }


    }
    protected void depart_SelectedIndexChanged(object sender, EventArgs e)
    {
        //绑定系部与专业

        if (depart.SelectedValue != "")
        {
            string sql = "select * from Special where departID=" + depart.SelectedValue;
            DataTable dt = db.reDt(sql);
            special.DataSource = dt;
            special.DataTextField = "SpeciName";
            special.DataValueField = "SpeciID";
            special.DataBind();
            special.Items.Insert(0, new ListItem("--请选择--", ""));
        }