获得如下结果并显示第2列(用户控制)&第3列(用户控件)按列1分组。我已经制作了如下代码,但它很慢,实际上当我只使用第1列时,加载很快(5秒),当我使用第1列和第1列时column2(用户控件“文档列表”)加载是10秒,当我使用第1列和第1列时第2列(文档列表“)& column3(”DocTransList“)加载是45秒。我认为LINQ中的代码效率不高,但我不知道如何解决它。
TRANSMITTAL No Documents REV
TT-001 DOC-001 01
DOC-002 01
public partial class Transmittals : System.Web.UI.Page
{
class TransmittalPresentationModel
{
public int TransID { get; set; }
public String TransmittalNo { get; set; }
public IEnumerable<tblDocument> Documents { get; set; }
public IEnumerable<tblTransmittall> DocTrans { get; set; }
}
private EDMSDataContext _DataContext;
protected void Page_Load(object sender, EventArgs e)
{
_DataContext = new EDMSDataContext();
if (!IsPostBack)
{
DisplayAuthors();
}
}
private void DisplayAuthors()
{
var query =
from transmittal in _DataContext.tbltransmittalNos
orderby transmittal.TRANSMITTAL
select new TransmittalPresentationModel
{
TransID = transmittal.TransID,
TransmittalNo = transmittal.TRANSMITTAL,
Documents = transmittal.tblTransmittalls.Select(Transmittals => Transmittals.tblDocument),
DocTrans = transmittal.tblTransmittalls
};
GridViewTransmittals.DataSource = query.ToList();
GridViewTransmittals.DataBind();
}
protected void GridViewTransmittals_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.DataItem == null) return;
TransmittalPresentationModel transmittal = (TransmittalPresentationModel)e.Row.DataItem;
DocumentList documentList = (DocumentList)e.Row.FindControl("DocumentList1");
DocTransList doctranslist = (DocTransList)e.Row.FindControl("DocTransList2");
documentList.Documents = transmittal.Documents;
documentList.DataBind();
doctranslist.DocTrans = transmittal.DocTrans;
doctranslist.DataBind();
}
}
答案 0 :(得分:0)
您遇到了问题,因为您的记录都需要在每页加载/刷新时都加载到GridView中。这会从数据库中提取数据,并且每次都绘制每一行,这非常耗时。
更好的选择是使用Ajax加载GridView。
或在服务器端使用分页,仅将数据提供给所需的页面。