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 MyOnLineExam.BusinessLogicLayer;

public partial class Web_admin_MultiSelectLists : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            ImageButton1.Attributes.Add("OnClick", "javascript:return confirm('确实要删除这些试题吗？')");
            InitDDLData();  //初始化考试科目          
        }
    }

    //初始化考试科目
    protected void InitDDLData()
    {
        Course course = new Course();       //创建考试科目对象
        DataSet ds = course.QueryCourse();  //查询考试科目信息
        ddlCourse.DataSource = ds;          //指名考试科目列表框数据源
        ddlCourse.DataTextField = "Name";   //DataTextField显示Name字段值
        ddlCourse.DataValueField = "ID";    //DataValueField显示ID字段值
        ddlCourse.DataBind();               //绑定数据
    }
    //显示选择科目的单选题
    protected void ddlCourse_SelectedIndexChanged(object sender, EventArgs e)
    {
        GridViewBind();//为GridView绑定数据
    }
    protected void GridViewBind()
    {
        MultiProblem multiproblem = new MultiProblem();  //创建多选题对象
        DataSet ds = multiproblem.QueryMultiProblem(int.Parse(ddlCourse.SelectedValue));//根据考试科目查询多选题信息
        GridView1.DataSource = ds.Tables[0].DefaultView;    //为GridView控件指名数据源
        GridView1.DataBind();                               //绑定数据
    }
    //删除试题事件
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        MultiProblem multiproblem = new MultiProblem();  //创建单选题对象
        int ID = int.Parse(GridView1.DataKeys[e.RowIndex].Values[0].ToString()); //取出要删除记录的主键值
        if (multiproblem.DeleteByProc(ID))
        {
            Response.Write("<script language=javascript>alert('成功删除试题！')</script>");
        }
        else
        {
            Response.Write("<script language=javascript>alert('删除试题失败！')</script>");
        }
        GridViewBind();//重新绑定数据
    }
    //删除多条记录
    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        MultiProblem multi = new MultiProblem();//创建MultiProblem对象              
        foreach (GridViewRow dr in GridView1.Rows)//对GridView中的每一行进行判断
        {
            if (((CheckBox)dr.FindControl("xuanze")).Checked)//如果选择了进行删除
            {
                int ID = int.Parse(((Label)dr.FindControl("Label1")).Text);
                multi.ID = ID;
                multi.DeleteByProc(ID);
            }
        }
    }
}