详细讲解DataList自定义分页的方法(3)

Code
protected void PagerButton_Click(object sender, EventArgs e)
{
   string arg = ((LinkButton)sender).CommandArgument.ToString().ToLower();
   int pageIndex = int.Parse(ViewState["PageIndex"].ToString());
   switch (arg)
   {
       case "first":
            pageIndex = 0;
            break;
       case "last":
            int itemCount = this.GetDataSource().Rows.Count;
            int totalPage = itemCount % this.ListSize == 0 ? itemCount / ListSize : itemCount / (ListSize + 1);
            pageIndex = totalPage - 1;
            break;
       case "prev":
            pageIndex = pageIndex - 1;
            break;
       case "next":
            pageIndex = pageIndex + 1;
            break;
    }
    ViewState["PageIndex"] = pageIndex;
    this.BindGrid();
    ddlPage.SelectedIndex = pageIndex;
}
触发下拉框的事件

Code
protected void ddlPage_SelectedIndexChanged(object sender, EventArgs e)
{
   ViewState["PageIndex"] = Int32.Parse(ddlPage.SelectedValue)-1;
   this.BindGrid();
   ddlPage.SelectedIndex = Int32.Parse(ViewState["PageIndex"].ToString());
}
代码很简单,就不解释了...要注意的是,下拉框要在页面载入的时候初始化,不然触发不到下拉框的事件.