Hello everybody, I got myself a strange problem
I have a DataGrid in the page, nothing special about it, only it connects datasource programatically and it supports paging.y. So the code is something like this
private void Page_Load(objec t sender, System.EventArg s e
if (!IsPostBack
GridBind()
private void GridBind(
myGrid..DataSou rce = GetSomeDataSour ce()
myGrid.DataBind ()
private void PageChanged(obj ect source, System.Web.UI.W ebControls.Data GridPageChanged EventArgs e
myGrid.CurrentP ageIndex = e.NewPageIndex
BindData()
This worked perfectly OK. Then I decided to try also to create grid columns dynamically. So I set the AutoGenerateCol umns property to false. I changed the code, so it would create some columns like this
private void Page_Load(objec t sender, System.EventArg s e
AddSomeColumnsT oGrid();
if (!IsPostBack
GridBind()
Now when I load the page for the 1st time, everything is OK. When I want to go to another page grid mystically disappears. I tried to debug the page setting breakpoint inside the PageChanged event and I never got there
Being desperate I tried everything possible then I came to something like this
private void Page_Load(objec t sender, System.EventArg s e
AddSomeColumnsT oGrid();
//if (!IsPostBack
GridBind()
and it worked. But now I am creating dataset 2 times in postback (supposing it's the page changed event)
Am I doing anything wrong? Because I really don't know how to solve this problem. Any helps would be very appreciated. 4 1431
I made some errors in the first source code, it should be this
private void Page_Load(objec t sender, System.EventArg s e
if (!IsPostBack
GridBind()
private void GridBind(
myGrid.DataSour ce = GetSomeDataSour ce()
myGrid.DataBind ()
private void PageChanged(obj ect source, System.Web.UI.W ebControls.Data GridPageChanged EventArgs e
myGrid.CurrentP ageIndex = e.NewPageIndex
GridBind()
I made some errors in the first source code, it should be this
private void Page_Load(objec t sender, System.EventArg s e
if (!IsPostBack
GridBind()
private void GridBind(
myGrid.DataSour ce = GetSomeDataSour ce()
myGrid.DataBind ()
private void PageChanged(obj ect source, System.Web.UI.W ebControls.Data GridPageChanged EventArgs e
myGrid.CurrentP ageIndex = e.NewPageIndex
GridBind()
Add the AddSomeColumnsT oGrid() method to the GridBind method. That way, any time you are going to bind the grid you know you have the columns.
I tried what you suggested, but the problem stays. Let's revisit the code once more (as you proposed):
private void Page_Load(objec t sender, System.EventArg s e)
{
if (!IsPostBack)
GridBind();
}
private void GridBind()
{
AddSomeColumnsT oGrid();
myGrid.DataSour ce = GetSomeDataSour ce();
myGrid.DataBind ();
}
private void PageChanged(obj ect source, System.Web.UI.W ebControls.Data GridPageChanged EventArgs e)
{
myGrid.CurrentP ageIndex = e.NewPageIndex;
GridBind();
}
Again it works OK when the page is loading for the 1st time. When I try to get another page, grid is gone. Debugging the project I found out that the execution never reaches the PageChanged handler. That is what confuses me mostly.
Because when I comment the line in Page_load like this:
private void Page_Load(objec t sender, System.EventArg s e)
{
// if (!IsPostBack)
GridBind();
}
it works. But now, unfortunately, the grid shows 2 copies of columns, logically, because I added them twice.
Resolution - the biggest problem as I see it is, that the execution is not passed to the handler of PageChanged event when postback occures, when I hit page number at the bottom of the grid.
This is pretty weird, I know. But that is why the solution is not easy to find in ANY help. Thanks in advance for further suggestions. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: RJN |
last post by:
Hi
Sorry for posting again.
I have a datagrid which is put inside a div tag to make it scrollable. I
need to page the datagrid. The page numbers appear at the bottom of the
datagrid and has to be scrolled down completely to see the page number
links. The page number should always be visible outside the scroll bar.
Basically I want to create the paging links dynamically and on click of
this it should fire PageIndexChanged event.
|
by: Shawn |
last post by:
Hi.
I already have a datagrid where I'm using paging. I have a stored procedure
that fills a temp table with 200-500 rows and then sends back 10 records at
the time. When I go to page 2 the SP fills the temp table again and returns
rows 10-19. The temp table is dropped after each call to the SP, so it has
to be created and filled every time the user changes page in the datagrid.
My question is this: Would it be more efficient to...
|
by: Axel Dahmen |
last post by:
Hi,
I'm using a DataGrid control to show a table's content with paging. For
navigation through the pages I'm using the DataGrid's intrinsic navigation
section.
My problem: The DataGrid navigation links use JavaScript to jump between
pages. I want them to use standard hyperlinks providing the page number in
some URL parameter so that I can copy the hyperlink elsewhere.
|
by: tshad |
last post by:
Is there a way to carry data that I have already read from the datagrid from
page to page?
I am looking at my Datagrid that I page through and when the user says get
the next page, I have to go to the database to get the next page. Is there
a way to use the dataset to allow us to read back and forth in it instead of
going back to the database to get it?
Thanks,
|
by: Pat |
last post by:
I have 3 Datagrid nested.
Master
Details
Child
The master has paging (And i'm using the paging inbuilt in the Datagrid)
in the Master DataGrid you select a linkbutton(using commandname) and it
populates the data in the Details DataGrid
(I'm using Dim Filter As String =
CStr(dtgMaster.DataKeys(dtgMaster.SelectedIndex)).Replace("'", "''") to
filter btw the Datagrids)
| |
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
| |
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |