在GridView上分頁

Question

我現在停留在如何在另一頁上顯示網格數據的問題上。

基本上，我有一個啟用了Paging的GridView名稱“ gdvRiders”。 問題是，當我單擊頁面2時，我得到了一個沒有數據的空白頁面。 有人能幫我嗎？ 我開始學習C＃

這是我的代碼：

protected void Page_Load(object sender, EventArgs e)
    {
        DataBase db = new DataBase(true);
        string strSQL;
        DataTable dt;

        if (!IsPostBack)
        {
            strSQL = "SELECT r.surname, r.firstname, cn.country, r.age, f.flagurl " +
                     "FROM (Riders r INNER JOIN par_CountryNation cn ON r.countryid = cn.countryid) INNER JOIN par_Flags f ON cn.flagid = f.flagid ";

            dt = db.getDataTableAc(strSQL, "list_Riders");

            gdvRiders.DataSource = dt;
            gdvRiders.DataBind();

        }

    }

    protected void gdvRiders_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
            gdvRiders.PageIndex = e.NewPageIndex;
            gdvRiders.DataBind();

    }
}

Answer 1

您需要將數據關聯到網格的數據源 。 You should put the code to bind the gridview in separate function and call it from page_load and PageIndexChanging.

protected void gdvRiders_PageIndexChanging(object sender, GridViewPageEventArgs e)
{             
       strSQL = "SELECT r.surname, r.firstname, cn.country, r.age, f.flagurl " +
                 "FROM (Riders r INNER JOIN par_CountryNation cn ON r.countryid = cn.countryid) INNER JOIN par_Flags f ON cn.flagid = f.flagid ";
        dt = db.getDataTableAc(strSQL, "list_Riders");
        gdvRiders.PageIndex = e.NewPageIndex;
        gdvRiders.DataSource = dt; 
        gdvRiders.DataBind();

}