AJAX :: Update Panel And GridView On LCD Screen?
Apr 9, 2010
I've an ASP.NET page with UpdatePanel containing WebPartManager, two web part zones and user controls as web parts. The web parts have GridViews. When testing on LCD screens, sometime GridView does not update correctly - some information is missing from columns in some rows. On normal PC the rendering is just fine. What might be the problem ? I'm using PageMethods to check for page update and then use _doPostback to update the whole page. Sometimes the caption of the web parts have also overlapped letters.
I've UpdateMode as conditional with rendering as block. Should I use inline mode ? What other things I could check and try ? Should I follow this link [URL] to destroy the GridView inside the web part on partial rendering?
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Sep 5, 2010
We have two update panels on our webpage. Now first update panel is having button cancel. While second update panel is having a file upload control.
Now if the user uploads a file that is going to upload in about 2 mins, and in between, say after 30 seconds the user clicks the cancel button, the upload taking place in update panel 2 should stop.
How do we achieve this ?
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Jun 5, 2010
I have a panel withitn an updatepanel with some buttons.
When one of the buttons is pressed, I'm updating a different update panel.
The problem is that when I click the button, nothing seems to happen.
If I click the button again , then I see the first update. If I click it again, I see the second update and so on..
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Aug 27, 2010
I have 2 gridviews in an update panel that for some reason will not update. There is no data entry, paging, sorting going on, the data is just there to be displayed. I'm using a timer that initiates every 5 minutes to trigger the updatepanel. I also have an updatepanel on an additional page where I am also using a trigger to fire the updatepanel with 2 charts and 1 oneline/column gridview. The 2 charts update just like they are supposed to however the gridview does not. Here is the code for the 2 Gridview aspx page:
[Code]....
Does anyone know the solution to this issue or if Gridviews just don't refresh in UpdatePanels.
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Apr 10, 2010
i've a gridview, a dropdownlist and an updatepanel
without UpdatePanel : when i select values from dropdownlist it updates the gridview, working fine
with UpdatePanel : it showing an javascript error
"Line: 4044
Error: Sys.InvalidOperationException: Two components with the same id 'ctl"
and when i close the window (ie8) the error is coming
"Line: 2989
Error: Sys.ArgumentNullException: Value cannot be null.
Parameter name: element"
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Oct 19, 2010
On my aspx page, I'm having troubles when I have an update panel within the footer template of a gridview. It appears to be an intermitent problem that occurs on subsequent postback when you do a delete command in the gridview. The first delete command always goes through fine (first postback). Clicking on another row to delete on the gridview (or any other button on the form) triggers this error: An error has occurred because a control with id 'ctl00$SupremeContent$grdLineNumbers$ctl09$ctl00' could not be located or a different control is assigned to the same ID after postback. If the ID is not assigned, explicitly set the ID property of controls that raise postback events to avoid this error.
If you click the back button in the browser, then click on another page, then come back to this page, you can delete another record. Another attempt to delete another record brings you back to the above problem. Thectl00$SupremeContent$grdLineNumbers$ctl09$ctl00 changes each time you delete, come back to the page and delete. If I disable the udpate panel, there's no errors. The reason I have the update panel is so that the user can select the relevant pipe specification (they see multiple columns using a textbox, drop down extender, panel and gridview) without the form's data being reset by the embedded gridview's selected index changed event. I've been trying to figure this out for a month now. Oh ya, this form is within a master page.
Here's the gridview code:
[Code]....
And this is the event that handles the delete command:
[Code]....
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Jan 8, 2010
add new row in gridview programmatically without postback (using update panel)?
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May 14, 2010
I have gridview with SelectedIndexChanged event.
when I click on a record in gridview it should call the SelectedIndexChanged event and do some operations.
SelectedIndexChanged event is working OK, but when I put the gridview inside ajax updatepanle SelectedIndexChanged event will not response even if I add AsyncPostBackTrigger trigger for SelectedIndexChanged event.
<%@ Page Title="" Language="C#" MasterPageFile="~/Master.Master" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="IMAM_APPLICATION.WebForm1" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<div id="mydiv">
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<br /> <br />
<br />
<asp:GridView ID="GridView1" runat="server"
style="position:absolute; top: 280px; left: 30px; height: 240px; width: 915px;"
PageSize="5"
onselectedindexchanged="GridView1_SelectedIndexChanged"
AutoGenerateColumns="False" DataKeyNames="idcontact_info">
<Columns>
<asp:CommandField ShowSelectButton="True" />
<asp:BoundField AccessibleHeaderText="Midle Name" DataField="Midle_Name" />
<asp:BoundField DataField="Last_Name" HeaderText="Last Name" />
<asp:BoundField DataField="Phone_home" HeaderText="Phone Home" />
<asp:BoundField DataField="cell_home" HeaderText="Mobile Home" />
<asp:BoundField DataField="phone_work" HeaderText="Phone Work" />
<asp:BoundField DataField="cell_Work" HeaderText="Mobile Work" />
<asp:BoundField DataField="Email_Home" HeaderText="Personal Home" />
<asp:BoundField DataField="Email_work" HeaderText="Work Email" />
</Columns>
</asp:GridView>
<br />
<br />
<br /></ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="GridView1"
EventName="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
<asp:RadioButton ID="rdoSearchFlat" runat="server"
style="position:absolute; top: 565px; left: 70px;" Text="Flat Search"
GroupName="Search"/>
<asp:TextBox ID="txtSearch" runat="server"
style="position:absolute; top: 560px; left: 170px;" ></asp:TextBox>
<asp:Button ID="btnSearch" runat="server" Text="Search"
style="position:absolute; top: 555px; left: 375px;"
CausesValidation="False" onclick="btnSearch_Click"/>
<asp:Label ID="Label7" runat="server" Style="position: absolute; top: 630px; left: 85px;"
Text="First Name"></asp:Label>
<asp:TextBox ID="txtFirstName" runat="server" Style="top: 630px; left: 185px; position: absolute;
height: 22px; width: 128px">
</asp:TextBox>
</div>
</asp:Content>
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Feb 4, 2010
I am having problems getting the Autocomplete extender to work within a grid view which is contained inside an update panel.Outside of the update panel the auto complete works fine, but when placed inside the 'EditItemTemplate' tags on my gridview it does not display any results. Debugging revealed that the webservice is being called and values returned, but they are not being displayed within the grid view.
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Oct 2, 2010
after filling all criteria when i press search button the result arrives in gridview nw when searchbutton pressed after that every 20seconds i want 2 update gridview data which is in update panel
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Dec 3, 2010
I have a Gridview select button and whole gridview enclosed with Update Panel + trigger on select. I found CSS of Gridview lost on select. How to deal with this ?
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Sep 20, 2015
My gridview is inside master page now in the link button used inside gridview for downloading, it is not downloading a file.
I followed this article : [URL] .....
It works in child pages, but when i use gridview inside master page and follow this article , it wont download a file. Here's my coding for beck end :
protected void DownloadFile(object sender, EventArgs e) {
try {
string filePath = (sender as LinkButton).CommandArgument;
Response.ContentType = "application/pdf";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + Path.GetFileName(filePath));
Response.WriteFile(filePath);
Response.End();
} catch (Exception) {
throw;
} }
Rest coding in html is same as mentioned in article.
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Jul 5, 2013
How to set scroll using css in gridview without update panal
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May 16, 2010
I have one update panel inside updatepanel i have one dropdownlist .When i change dropdownlist value so as per value button1 which is out of updatepanel not visible =true or false as per dropdownlist value.
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Jun 22, 2010
I have a user control which has a gridview with hidden fields in some of the template columns. The grid columns are created and bound by code dynamically in each postback and not in design mode. The gridview is placed in an update panel. In my aspx page where i use the user control , there is a dropdown which fires postback and based on the selected value of the dropdown the grid data gets filtered. The dropdown in aspx is not part of any update panel.
After the postback of dropdown, the grid data gets filtered and the grid is rebound with fresh values. The values in the controls like label, button or link button are bound correctly. But the values in the hidden fields are not refreshed and always points to the values of the rows that was generated before the postback of the page (initial page load).
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May 7, 2015
If the gridview and print button are inside the update panel,then the print fuction is not calling.
If i place the print button outside the update panel then it is working fine.
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Jul 14, 2013
Gridview binding data from database without doing postback on the select of item in dropdown.i know it is possible through ajax update panel but for some specific reason it can't use it.And i think that gridview is a server-side control and if i implement it by using table structure , jquery ajax and web service then it will loose all gridview properties of edit, update and paging etc.
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Dec 3, 2010
i hv a gridview in modal popup,I hv taken checkboxes in itemtemplate and written code in javascript function to checked or uncheck the checkboxes.and in pageindexchanged event calling that javascript function to maintain the state of checkboxes.it is working fine.but when i put it inside update panel nothing is happening.
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Aug 6, 2010
Looking for the best technique on handling or at least some documentation showing an example.
Starting Page
Gridview control withing an update panel (also various controls used for filtering NOT IN UPDATE PANEL)
Databinding does not happen during page load.
Databinding is initiated when update panel trigger (asp:Button object) is clicked
Hyperlink column is added to returned records
Hyperlink posts to a separate page for detail for record which the hyperlink was clicked.
Second Page
While navigating via the browser back button to previous page (which contained the update panel and gridview) only the (various controls used for filtering) have retained state. The gridview is not shown (which is how the page loads initially when starting) How can I retain the state of the Gridview and add a step in the browser history all together?
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Nov 22, 2010
I have three panels on a page:
panel_A has a gridView gv1 with PageSize = "5" OnRowCommand = "LoadCompanyInfo" OnPageIndexChanging="gridView_PageIndexChanging1"
Panel_B has gridview gv2 with PageSize = "5"
OnRowCommand = "SelectEmployee" OnPageIndexChanging="gridView_PageIndexChanging2"
Panel_C has labels CompanyID, CompanyName, EFirst, ELast and EMiddle.
Panel_A panel_B and panel_C are in an update panel.
Each row in gv1 is a LinkButton, so if I click on a row, it runs a method 'LoadCompanyInfo' which updates the labels in panel_C and also populates the gridview on panel_B. This part is working fine, when I click on a row in gv1, it updates the labels text in Panel_C and populates gv2 in panel_B. I am having the following issues:
1. When I click on a row in gv2, it makes the labels text in panel_C blank and gv2 also becomes blank, shows EmptyDataText. I expect it to just update EFirst, ELast and EMiddle. in panel_A.
2. When I click on the next page no on gv1 it fires LoadCompanyInfo method first and then goes in the gridView_PageIndexChanging1 event. I expect it to go in the gridView_PageIndexChanging1 event only and show next page in gv1 and not in LoadCompanyInfo, because I am just clicking on page no 2 not row 2.
3. gv1 refreshes on a timer event OnTick = Timer_Tick, and it clears off data in panel_B and panel_C. I want it to just update panel_A.
I guess I will have to set up nested Update panels to accomplish this.
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Mar 1, 2010
I have seen alot of posts on the inetrnet with the solution to mainatin gridview scroll using an Ajax Update Panel.
Every solution I have seen though seems to have the same problem..as explained they dont work in content forms with master pages...at leat no solution I have seen has worked.
Does anyone know how to resolve this problem of using update panel to maintain gridview scroll with masterpages?
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Aug 4, 2010
i have my master page with one update panel working like a banner, so when the timer do tick every 5 sec
the image change. That works fine, but i have an update panel in my index page, this update panel works with some buttons that change the text inside the panel when click.
Now, the problem.
When i click one button to change the text and the banner change, the text returns to his default text. The update in master page is affecting the update on index page.
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Jan 12, 2011
<cc1:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</cc1:ToolkitScriptManager>
<asp:Timer runat="server" id="timer" Interval="5000" OnTick="timer_Tick">
</asp:Timer>
[code]...
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Jan 2, 2010
I have a panel bar..each time I press panel bar item I display ascx control with in update panel..but it lakes update panel loading time lot..how I can decrease that loading time?
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Aug 30, 2010
I have an AJAX Modal Popup panel that contains a RadioButtonList, 2 labels and 2 DropDowns. I want to update the Labels and DropDowns when a radio button is selected. My attempt at this posts back which causes the ajax popup to disappear.
aspx called on image click:
<asp:Panel ID="pnlModalContainer" runat="server">
<asp:RadioButtonList ID="rblTest" runat="server" RepeatDirection="Horizontal" OnSelectedIndexChanged="rblTest_SelectedIndexChanged">
[code]...
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