how to add a pages to datalisit in asp.net

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C#

ASP.NET

hI,Friends i am want to add pages to data list iam write code like below but it is not working properly please help me...

my code is :

protected void Page_Load(object sender, EventArgs e)
{
    ViewState["currentPage"]=0;
    
    
    if (!Page.IsPostBack)
    {          
    }

    databinddatalist();
}

private void Binddatalistgal()
{
    string constr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
   SqlDataAdapter dadapter = new SqlDataAdapter("SELECT Album2.AlbumID, Album2.DefaultPhotID, Album2.AlbumName,Album2.AlbumDescription, PhotAlbum.Photo FROM Album2 INNER JOIN PhotAlbum ON Album2.DefaultPhotID = PhotAlbum.PhotoID", constr);
   DataSet dset = new DataSet();
   adsource = new PagedDataSource();
   dadapter.Fill(dset);
   adsource.DataSource = dset.Tables[0].DefaultView;
   adsource.PageSize = 2;
   adsource.AllowPaging = true;
   adsource.CurrentPageIndex = Convert.ToInt32(ViewState["currentPage"]);
   dl_imgalbums.DataSource = adsource;
   dl_imgalbums.DataBind();
   lbnnext.Enabled = !adsource.IsLastPage;
   lbnprevious.Enabled = !adsource.IsFirstPage;
}

protected void lbnprevious_Click(object sender, EventArgs e)
{
    int currentPage = Convert.ToInt32(ViewState["currentPage"]);
    
    currentPage -= 1;
    
    ViewState["currentPage"] = currentPage;
    Binddatalistgal();
}
protected void lbnnext_Click(object sender, EventArgs e)
{
    int currentPage = Convert.ToInt32(ViewState["currentPage"]);
    
    currentPage += 1;
    
    ViewState["currentPage"] = currentPage;
    Binddatalistgal();  
}

when i am click in next link it will shows like

"This webpage is not available"

so please help me.............