Forms Data Controls :: How To Display Large Amount Of Data (about 150.000) On One Page Without Paging
Mar 5, 2010
we have a classic ASP Webpage for displaying reporting data.
The process is following:
user inputs reporting criteria reporting criteria are passed to a method in a VB6 DLL containing the reporting business logic (generating a dynmic sql statement) VB6 DLL method returns xml data xml data are displayed with xsd transformation 150.000 datarows are displayed in some seconds (less than 10 seconds maybe) Now we want to extend this reporting function and decided to use asp.net (2.0) So I have written a little prototyp application with a SqlDataSource Object and a GridView Control.
A table with less data (about 100 or so) are displayed quickly.
But a view with about 150.000 datarows needs about 2 minutes and ended with a OutOfMemoryException!
The request of the customer is definitvely to display the data on one page like in the old classic asp application!
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protected void Page_Load(object sender, EventArgs e)
{
// Retreive page from the query string
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int howManyPages = 1;
// pager links format
string firstPageUrl = "";
string pagerFormat = "";
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newsList.DataSource = DataAccess.GetNews(page, out howManyPages);
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// have the current page as interger
int currentPage = Int32.Parse(page);
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bottomPager.Show(int.Parse(page), howManyPages, firstPageUrl, pagerFormat, true);
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<p>
Page
<asp:Label ID="currentPagelabel" runat="server" />
of
<asp:Label ID="howManyPageLabel" runat="server" />
|
<asp:HyperLink ID="previousLink" runat="server">Previous</asp:HyperLink>
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</asp:Repeater>
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using System;
// Simple struct that represents a (page number, url) association
public struct PageUrl
{
private string page;
private string url;
// Page property definition
public string Page
{
get
{
return page;
}
}
// Url property definition
public string Url
{
get
{
return url;
}
}
// Constructor
public PageUrl(string page, string url)
{
this.page = page;
this.url = url;
}
}
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{
protected void Page_Load(object sender, EventArgs e)
{
}
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(@PageNumber INT,
@PostsPerPage INT,
@HowManyPosts INT OUTPUT)
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NewsID INT,
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