protected void Buttonzsdss_Click(object sender, EventArgs e)//按知识点检索教学资源
    {
        if (TreeView1.CheckedNodes.Count == 0)
        {
            ScriptManager.RegisterClientScriptBlock(this, typeof(string), "", "alert('请在左侧知识树中勾选知识点!');", true);
            return;
        }
        HFziyuanlx.Value = "zhishidian";
        List <int> zhishidianids = new List <int>();

        GetZhisshidianids(zhishidianids);
        if (username != null && usershenfen != null)//对登录用户
        {
            string    ziyuanleixing = DropDownListziyuanleixing.SelectedValue;
            string    meitileixing  = DropDownListmeitileixing.SelectedValue;
            DataTable dt            = ZiyuanInfo.GetZiyuan(zhishidianids, username, usershenfen, ziyuanleixing, meitileixing);
            GridView1.DataSource = dt;
            GridView1.DataBind();
        }
        else//对游客
        {
            string    ziyuanleixing = DropDownListziyuanleixing.SelectedValue;
            string    meitileixing  = DropDownListmeitileixing.SelectedValue;
            DataTable dt            = ZiyuanInfo.GetZiyuan(zhishidianids, ziyuanleixing, meitileixing);
            GridView1.DataSource = dt;
            GridView1.DataBind();
        }
    }
    protected void Button1_Click(object sender, EventArgs e)//按关键字检索教学资源
    {
        HFziyuanlx.Value = "guanjinazi";
        string guanjianzi = TextBox1.Text.Trim();

        if (username != null && usershenfen != null)
        {
            GridView1.DataSource = ZiyuanInfo.GetGuanjianziZiyuan(username, usershenfen, guanjianzi);
        }
        else
        {
            GridView1.DataSource = ZiyuanInfo.GetGuanjianziZiyuan(guanjianzi);
        }
        GridView1.DataBind();
    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        if (TreeView1.CheckedNodes.Count == 0)
        {
            ScriptManager.RegisterClientScriptBlock(this, typeof(string), "", "<script language='javscript'>alert('请在左侧知识树中勾选知识点!');</script>", false);
            return;
        }
        switch (HFziyuanlx.Value.Trim())
        {
        case "guanjianzi":
            string guanjianzi = TextBox1.Text.Trim();
            if (username != null)
            {
                GridView1.DataSource = ZiyuanInfo.GetGuanjianziZiyuan(username, usershenfen, guanjianzi);
            }
            else
            {
                GridView1.DataSource = ZiyuanInfo.GetGuanjianziZiyuan(guanjianzi);
            }
            GridView1.DataBind();
            GridView1.PageIndex = e.NewPageIndex;
            break;

        case "zhishidian":
            List <int> zhishidianids = new List <int>();
            GetZhisshidianids(zhishidianids);
            string ziyuanleixing = DropDownListziyuanleixing.SelectedValue;
            string meitileixing  = DropDownListmeitileixing.SelectedValue;
            if (username != null && usershenfen != null)
            {
                GridView1.DataSource = ZiyuanInfo.GetZiyuan(zhishidianids, username, usershenfen, ziyuanleixing, meitileixing);
            }
            else
            {
                GridView1.DataSource = ZiyuanInfo.GetZiyuan(zhishidianids, ziyuanleixing, meitileixing);
            }
            GridView1.DataBind();
            GridView1.PageIndex = e.NewPageIndex;
            break;

        default:
            break;
        }
    }