Forms Data Controls :: Set Paging On Gridview But When Click On A Page It Doesn't Work?

Feb 26, 2010

I'm trying to set paging on my gridview but when i click on a page it doesn't work. It return a blank page. Here's my code:

[Code]....

Behind code:

[Code]....

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Ajax - Gridview Paging Doesnít Work Inside UpdatePanel

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Altough questions somehow similar to this have been asked for a number of times, but the question is still unsolved. Here is the question: I have a gridview which is contained in a tab container ajax control which itself is inside an updatepanel. Gridview works excellent and its corresponding methods are fired accurately, but when I enable paging, (e.g.) after I click on page 2, the gridview hides itself. here is my PageIndexChanging method:

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
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Why paging causes gridview to stop working correctly? What can I do?

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Forms Data Controls :: Paging Datalist - Display The Next Page Of Results Doesn't Do Anything

Feb 9, 2010

I have a datalist and want the results paged I have written a pager.ascx page and have an aspx and aspx.cs page to display the results. I have a stored procedure to pull the data out of the database and a class to talk between the stored procedure and presentation controls I have the pager being displayed when the results get over the limit I have set to 10 in the web.config file but when i click on the next link to display the next page of results it doesn't do anything. my aspx page is

<uc1:Pager ID="topPager" runat="server" Visible="False" />
<asp:DataList ID="newsList" runat="server" CssClass="List" align="center">
<ItemStyle CssClass="ItemList" />
<ItemTemplate>
<h2><%# Eval("Title") %></h2>
<p>Posted <%# Eval("Date") %></p>
<p><%# Eval("News").ToString().Replace("
", "<br />") %></p>
</ItemTemplate>
</asp:DataList>
<uc1:Pager ID="bottomPager" runat="server" Visible="False" />
my aspx.cs page is
protected void Page_Load(object sender, EventArgs e)
{
// Retreive page from the query string
string page = Request.QueryString["Page"];
if (page == null) page = "1";
// How many pages of posts
int howManyPages = 1;
// pager links format
string firstPageUrl = "";
string pagerFormat = "";
//DataAccess.GetNews returns a DataTable object containing news data which is read into datalist
newsList.DataSource = DataAccess.GetNews(page, out howManyPages);
// Bind the data to the data source
newsList.DataBind();
// have the current page as interger
int currentPage = Int32.Parse(page);
// Display pager controls
topPager.Show(int.Parse(page), howManyPages, firstPageUrl, pagerFormat, false);
bottomPager.Show(int.Parse(page), howManyPages, firstPageUrl, pagerFormat, true);
}
my pager.ascx page is
<p>
Page
<asp:Label ID="currentPagelabel" runat="server" />
of
<asp:Label ID="howManyPageLabel" runat="server" />
|
<asp:HyperLink ID="previousLink" runat="server">Previous</asp:HyperLink>
<asp:Repeater ID="pagesRepeater" runat="server">
<ItemTemplate>
<asp:HyperLink ID="hyperlink" runat="server" Text='<%# Eval("Page") %>' NavigateUrl='<%# Eval("Url") %>' />
</ItemTemplate>
</asp:Repeater>
<asp:HyperLink ID="nextLink" runat="server">Next</asp:HyperLink>
</p>
my pager.aspx.cs page is
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;
}
}
// The pager control
public partial class UserControls_Pager : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
}
// Show the pager
public void Show(int currentPage, int howManyPages, string firstPageUrl, string pageUrlFormat, bool showPages)
{
// Display paging controls
if (howManyPages > 1)
{
// make the pager visable
this.Visible = true;
// Display the current page
currentPagelabel.Text = currentPage.ToString();
howManyPageLabel.Text = howManyPages.ToString();
// Create the Previous link
if (currentPage == 1)
{
previousLink.Enabled = false;
}
else
{
previousLink.NavigateUrl = (currentPage == 2) ? firstPageUrl : String.Format(pageUrlFormat, currentPage - 1);
}
// Create the Next link
if (currentPage == howManyPages)
{
nextLink.Enabled = false;
}
else
{
nextLink.NavigateUrl = String.Format(pageUrlFormat, currentPage + 1);
}
// Create the page links
if (showPages)
{
// The list of pages and their URLs as an array
PageUrl[] pages = new PageUrl[howManyPages];
// Generate (page, url) elements
pages[0] = new PageUrl("1", firstPageUrl);
for (int i = 2; i <= howManyPages; i++)
{
pages[i - 1] = new PageUrl(i.ToString(), String.Format(pageUrlFormat, i));
}
// Do not generate a link for current page
pages[currentPage - 1] = new PageUrl((currentPage).ToString(), "");
// Feed the pages to the repeater
pagesRepeater.DataSource = pages;
pagesRepeater.DataBind();
}
}
}
}
my class file is
// Retreive the list of news posts
public static DataTable GetNews(string pageNumber, out int howManyPages)
{
// Get a configured DbCommand object
DbCommand comm = GenericDataAccess.CreateCommand();
// Set the stored procedure name
comm.CommandText = "GetNews";
// create a new parameter for page number
DbParameter param = comm.CreateParameter();
param.ParameterName = "@PageNumber";
param.Value = pageNumber;
param.DbType = DbType.Int32;
comm.Parameters.Add(param);
// create a new parameter for products per page
param = comm.CreateParameter();
param.ParameterName = "@PostsPerPage";
param.Value = PlatiumMindProductionsConfiguration.PostsPerPage;
param.DbType = DbType.Int32;
comm.Parameters.Add(param);
param = comm.CreateParameter();
param.ParameterName = "@HowManyPosts";
param.Direction = ParameterDirection.Output;
param.DbType = DbType.Int32;
comm.Parameters.Add(param);
// Execute the stored procedure and saven the results in a DataTable
DataTable table = GenericDataAccess.ExecuteSelectCommand(comm);
// Calculate how many pages of posts and set the out parameter
int howManyPosts = Int32.Parse(comm.Parameters["@HowManyPosts"].Value.ToString());
howManyPages = (int)Math.Ceiling((double)howManyPosts / (double)PlatiumMindProductionsConfiguration.PostsPerPage);
// return the page of posts
return table;
}
my stored procedure is
ALTER PROCEDURE [dbo].[GetNews]
(@PageNumber INT,
@PostsPerPage INT,
@HowManyPosts INT OUTPUT)
AS
-- Declare a new table
DECLARE @News TABLE
(RowNumber INT,
NewsID INT,
Title NVARCHAR(50),
Date DATETIME,
News NVARCHAR(MAX))
-- Populate the table with the complete list
INSERT INTO @News
SELECT ROW_NUMBER() OVER (ORDER BY NewsID desc),
NewsID, Title, Date, News
FROM News
-- return the total number of posts
SELECT @HowManyPosts = COUNT(NewsID) FROM News
-- extract the request page of posts
SELECT NewsID, Title, DATE, News
FROM @News
WHERE RowNumber > (@PageNumber - 1) * @PostsPerPage
AND RowNumber <= @PageNumber * @PostsPerPage

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[Code]....

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[Code].....

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Name
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.
.
Submit

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[Code]....

And I get error:

[Code]....

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asp:AccessDataSource
ID="AccessDataSource1"
runat="server"
DataFile="~/browser.mdb"
DeleteCommand="DELETE FROM [ConferenceRoomCalendar] WHERE [ID] = ?"
InsertCommand="INSERT INTO [ConferenceRoomCalendar] ([ID], [ConferenceRoomName], [DateNeeded], [StartTime], [FinishTime], [RequestedBy], [Purpose]) VALUES
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<asp:QueryStringParameter
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QueryStringField="Date()"
Type="DateTime"
/>
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<asp:Parameter
Name="ID"
Type="Int32"
/>
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<asp:Parameter
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Type="String"
/>
<asp:Parameter
Name="DateNeeded"
Type="DateTime"
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<asp:Parameter
Name="StartTime"
Type="DateTime"
/>
<asp:Parameter
Name="FinishTime"
Type="DateTime"
/>
<asp:Parameter
Name="RequestedBy"
Type="String"
/>
<asp:Parameter
Name="Purpose"
Type="String"
/>
<asp:Parameter
Name="ID"
Type="Int32"
/>
</UpdateParameters>
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<asp:Parameter
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Type="Int32"
/>
<asp:Parameter
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Type="String"
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<asp:Parameter
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Type="DateTime"
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<asp:Parameter
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Type="String"
/>
<asp:Parameter
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Type="String"
/>
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[Code]....

And here's my FormView control:

[Code]....

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[Code].....

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[Code]....

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[Code]....

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[code]...

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So my problem is as followes:

i have a gridview in another gridview (gv2 inside gv1).

in codebehind, at pageload i have: [Code]....

witch gives me a number of total records in the gv2 to a label. something like a coment number label.

my problem occures when i press the page button (allowpaging = true) on the first gridview. it acts kinda like this:

it makes the second gridview.visible = true; doest string the number of rows, and the label.text = "";

i've tried to make a code like this:

if (Ispostback)
{
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foreach ...etc..
}
else
{
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}

Also the gridview 1 and 2 the datasource is an SqlDataSource.

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Feb 14, 2010

to explain my problem as simple as i can i have made the following page each textbox is a required field. when i enter valid data in the text box and click the button everything is fine. the problem i am having is that after this button click > i empty out the last 2 textboxes > click the button > the required field validation is not thrown.

the autopostback property being set to true is a must in this case.

[Code]....

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I am trying to get paging to work on a DataList bound to a DataSet, using SQL stored procedures, with and without parameters, and without using querystrings.

I allow visitors of the page to filter the DataList by either selecting a value from various dropdowns e.g to see products of a certain supplier on the page or by clicking hyperlinks e.g to show all products.

The problem is paging isn't working at all. The next and previous buttons are not changing the page. However, I am not getting any error messages.

Here's my code. Note I have excluded all my dropdown methods that simply call getData and pass relevant parameters. However the default dataset view should still work.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;

[Code]....

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I want to create a gridview with checkboxes. (only vb.net)

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