SysManage/AddClassCourse.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 SysManage_AddClassCourse : System.Web.UI.Page
{
    string id = string.Empty;
    protected void Page_Load(object sender, EventArgs e)
    {
        id = Request.QueryString["id"];
        if (!IsPostBack)
        {
            if (Session["RoleName"] != null)
            {
                BindClass();
                BindCourse();
                int courseId = Convert.ToInt32(ddlCourse.SelectedValue);
                BindTeacher(courseId);
                if (!string.IsNullOrEmpty(id))
                {
                    Get_Data();
                }
            }
            else
            {
                Response.Redirect("Login.aspx");
                return;
            }

        }
    }


    private void BindClass()
    {
        try
        {
            string sql = "select * from Classes";
            DB.Bind_Dropdownlist(sql, ddlClass, "ClassId", "ClassName");
        }
        catch (Exception)
        {
            Common.ShowMessage(this.Page, "页面加载时出现异常。", "");
        }
    }

    private void BindCourse()
    {
        try
        {
            string sql = "select * from Courses";
            DB.Bind_Dropdownlist(sql, ddlCourse, "CourseId", "CourseName");