I have two UpdatePanels. One UpdatePanel has a CheckBox and a UserControl. UserControl has some TextBoxes. In other updatepanel, there are few Labels.
I have added javascript function to checkbox to hide/show it. I am using Javascript to avoid partial postbacks to server.
I also want to update the second UpdatePanel when checkbox is checked/unchecked or some data is changes in user control's textboxes.
Can I call javascript function as well as server side function on same checkbox ? I tried adding triggers to second updatepanel but they are not fired.
updatepanel1
checkbox
usercontrol
textbox1
texbox2
updatepanel2
label1 (updated on change of textbox 1)
label2 (updated on change of textbox 1)
my checkbox markupd looks like this
<asp:CheckBox ID="chkShippingSameAsBilling" runat="server"
Text=" Ship to same address"
AutoPostBack="true" Checked="true"
onclick="return ShowShippingAddress();"
/>
You can add a dummy button on the page. Set async postback trigger for the second panel on the button.
<asp:AsyncPostBackTrigger ControlID="btnAsync" EventName="Click" />
In the check changed of the check box, in javascript call function
btnAsync.Click();
It will postback the second update panel asynchronously. You can call server side functions from second panel postback or by adding server side click event to dummy button.
Put a hidden button in your second updatePanel:
<div style="display:none">
<asp:Button ID="YourButton" runat="server" />
</div>
Then click in using your onclick function:
function ShowShippingAddress()
{
document.getElementById('<%# YourButton.ClientID %>').click()
}
That should cause the second to postback and update.
You will need to set up a trigger in the second panel to use the event from the checkbox, there are some examples here.
http://www.asp.net/web-forms/tutorials/aspnet-ajax/understanding-asp-net-ajax-updatepanel-triggers
Trigger an update of the UpdatePanel by a control that is in different ContentPlaceHolder
Also, take a look at knockout.js or jquery for some more elegant solutions...
http://knockoutjs.com/
Related
I have one asp button I want avoid pageload on button click
Plz someone help
Even JavaScript method will be ok for me
The framework fundamentally does not work that way. If you stay true to the framework, you can wrap your button in an update panel. That will remove the visible postback, but that will still fire the postback and perform the page load and click event.
In essence the update panel will dump your entire page into memory, then reload only the differences, simulating an ajax request.
The link submitted only allows the button to perform a JavaScript function, which would still need to Ajax to the backend.
<asp:UpdatePanel ID="upSample" runat="server" ...>
<ContentTemplate>
<asp:Button id="btnSample" runat="server" ... />
</ContentTemplate>
</asp:UpdatePanel>
Otherwise you should not use a server side event at all, simply do traditional html <input type="button" click="btnSample_Click()" /> that is actually doing Ajax directly to the server side.
I am hoping this is easy, but I have looked and can't find a solution that will work for me. I have an aspx page with 2 user controls on it. One is a user control with a spun-up Auto Complete text box, that I want the "Enter" key to to cause a postback.
I have a button in the other control on the page that the onClick does something else. When I put text in the Auto Complete and press enter, the onClick for the button fires. Is there a way to have the enter key not cause the onClick to fire.
I have tried some javascript to disable the enter key press, but that breaks my text box enter.
What are my options.
EDIT 1
Here is some markup that I have
<uc:CompanyAC runat="server" ID="ac" />
<cc2:GenericGridView OnHtmlDataCellPrepared="HtmlDataCellPrepared"
KeyFieldName="CompanyID" ID="gridCompanies" DataSourceID="ManageCompaniesObjectDataSource" runat="server"
AutoGenerateColumns="False" />
The CompanyAC control has a textbox with some jquery that does autocomplete WS call (no need to show that
<asp:TextBox ID="searchbox" runat="server" Width="400px" />
The GenericGridView control contains a button
<asp:Button runat="server" ID="Button" Text="New" AllowFocus="false" OnClick="Button_Click" />
So what happens is that when the Enter Key is hit when the focus is on the Textbox, the button that is in the other control fires its onclick. I do not want that to happen, but I still want the postback to happen
try this
$('input').keypress(function(event){
if(event.keyCode==13)
{
event.preventDefault();
}
})
If you're using jQuery, you might try this:
$('input').on('keypress', function(e){
// Attempt form submit (after event function exits).
var f = $(this).parents('form');
setTimeout(function(){f.submit();}, 1);
// Return false to prevent form submit when enter key is pressed.
return !((window.event) ? window.event.keyCode : e.which)==13);
});
I'm adding a variable number of update panels in Page_Init.
I already have a script manager in my master page.
The problem is that when I try to add a trigger like:
AsyncPostBackTrigger trig2 = new AsyncPostBackTrigger();
trig2.ControlID = ddl22.UniqueID;
trig2.EventName = "SelectedIndexChanged";
up2.Triggers.Add(trig2);
where ddl22 is a DropDownList, the event never seems to trigger the UpdatePanel.
In the UpdatePanel I have another DropDownList the data of which i want to change when the trigger happens.
The funny thing is that in the master page I have a timer. This timer is only supposed to trigger the UpdatePanel in the master but it seems to trigger all of my update panels. However, even when it triggers the update panel in the child page, the second DropDownList does not change its data.
The data is databound to the DropDownList in the UpdatePanel in page_init. It is bound to an objectdatasource which uses the selected item in the first DropDownList as a parameter to determine what data it should bind.
Did you set AutoPostBack="True" for your drop down list? I suspect this is the issue.
Also set your update panel mode to conditional-UpdateMode="Conditional" so that i does not affect other update panels.
Try this,
In Source Code,
<asp:UpdatePanel ID="up2" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:DropDownList ID="ddl1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddl1_SelectedIndexChanged"></asp:DropDownList>
<asp:DropDownList ID="ddl2" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddl2_SelectedIndexChanged"></asp:DropDownList>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="ddl2" />
</Triggers>
</asp:UpdatePanel>
You can manually call the UpdatePanel to refresh without specifying a trigger on a postBack event. Firstly, set the UpdateMode property to 'Conditional', then you can just call an update on your updatepanel from code behind like
MyUpdatePanel.Update();
I have an asp.net web page with asp:button control. I need to show two (normal) HTML buttons for the click event of the asp:button control.
My requirement is when the page load for the first time there will be only asp:button there visible. After I click on that asp:button other two HTML buttons should be visible. But they should be visible for all the other postbacks. I mean if there would be any post backs, that HTML buttons should be visible constantly. How could I do that? Please help me. I tried to implement that using jquery hide and show.
You can use <asp:Button> controls for the other two buttons, and can set Visible="false" initially, then setting Visible="true" when you need to show them. This way, the server can do everything, and retain viewstate too so you don't have to reshow the buttons everytime the page posts back.
ASP buttons are standard buttons but can trigger the functionality you want through the OnClientClick property:
<asp:Button .. UseSubmitBehavior="false" Text="Move up" OnClientClick="moveSlider(1);return false;" />
<asp:Button .. UseSubmitBehavior="false" Text="Move down" OnClientClick="moveSlider(-1);return false;" />
Using return false; makes sure that the button doesn't postback, and UseSubmitbehavior="false" renders an <input type='button' /> instead.
HTH.
Is it possible to use an UpdatePanel that has like a few text boxes, and a search button, and then perhaps another UpdatePanel that has a gridview in it to return the results of what was searched. When the user clicks search it hides the boxes, and displays the gridview. Can I do this with UpdatePanels? I am using c# for my coding. Or should I be doing this another way?
You only need one UpdatePanel in that case and setup a Trigger to your search Button.
Put only the controls that will be refreshed in your UpdatePanel.
Example:
<asp:TextBox ID="txtSearchCriteria" runat="server" />
<asp:Button ID="btnSearch" runat="server" OnClick="btnSearch_Click" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnSearch" EventName="Click" />
</Triggers>
<ContentTemplate>
<asp:GridView ID="grdSearchResults" runat="server">
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
Implement the btnSearch_Click function to execute your search and bind the results to the GridView. The UpdatePanel will handle the ajax call and replacing of the HTML that the GridView will produce.
You want to keep as much out of the UpdatePanel as possible and only include what will actually change because it is transmitting that HTML with each update so it's a waste of resources if you are not actually doing anything to those controls with each action. That is why a trigger is best to be used in this case which will hook the UpdatePanel to the Click event outside of the UpdatePanel scope.
Read up more on UpdatePanel and how triggers work on MSDN.
If I understand the question correctly, you can do that with two <asp:Panel> controls inside the <UpdatePanel>. One panel for the textboxes, and the other for the gridview. You set which panel to show in the codebehind, depending on whether you're expecting your user to enter search criteria, or review the search results.
Yes you can.
You also could use just one update panel. Since you the Search Form (could be in a Panel) and the GridView inside the UpdatePanel.