Question

我正在尝试在gridview中实现自定义分页而不使用任何数据源控件。到目前为止，我没有找到任何好的/完整的教程。

以下是我创建gridview的方法：

 <asp:GridView ID="GridView1" runat="server" AllowPaging="True" PageSize="10" 
               onpageindexchanging="GridView1_PageIndexChanging" ShowFooter="True">
 </asp:GridView>

单击按钮时会填充此网格。需要根据列表框控件中的项目选择数据库中的行

protected void btnSearch_Click(object sender, EventArgs e)
{
    using (context = new TrackForceDataEntities())
    {
        try
        {
            string[] arr = lstStates.Items.Cast<ListItem>().Select(i => i.Text).ToArray();
            var searchResults = context.data_vault.Where(d => arr.Contains(d.STATE)).OrderByDescending(d=>d.STATE);

            GridView1.DataSource = searchResults;
            GridView1.DataBind();
         }
         catch (Exception exception)
         {
             Response.Write(exception.Message);
         }
     }
}

上面的查询非常慢，因为它带来了所有记录，如何才能获取一个页面记录并仍显示分页？

接下来是gridview PageIndexChanging事件。当我点击第2页时，它会显示第2页的行，但分页链接会消失。

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    using (context = new TrackForceDataEntities())
    {
        try
        {
            // var searchResults = context.data_vault.Where(d => d.STATE == lstStates.SelectedItem.Text).OrderBy(d => d.dv_id).Take(10).Skip(2);


            //var selection = lstStates.Items(i => i.Text).ToArray();
            //var result = context.data_vault.Where(x => selection.Contains(x.Prop));

            string[] arr = lstStates.Items.Cast<ListItem>().Select(i => i.Text).ToArray();

            var result = context.data_vault.Where(d => arr.Contains(d.STATE)).OrderByDescending(d => d.STATE).Skip(e.NewPageIndex * GridView1.PageSize)
                                         .Take(GridView1.PageSize)
                .ToList();

            //var result = context.data_vault.Where(d => d.STATE == lstStates.SelectedItem.Text).OrderBy(d => d.STATE).Skip(e.NewPageIndex * GridView1.PageSize).Take(GridView1.PageSize).ToList();
            //// this is very important part too
            GridView1.PageIndex = e.NewPageIndex;

            GridView1.DataSource = result;
            GridView1.DataBind();

        }
        catch (Exception exception)
        {
            Response.Write(exception.Message);
        }
    }
}

Answer 1

通过以下链接您将能够得到答案。通过传递页码和页面大小，通过sql server完成了分页。

Click here

asp.net中的自定义分页，没有使用Entity Framework的数据源控件

1 个答案: