I have a simple ASP.NET Button inside of iFrame, for strange reason i have to click it twice in order to fire an event.
<asp:Button ID="btnSaveComment" runat="server" Text="Add Comment"
CssClass="button"
OnClick="btnSaveComment_Click"
ValidationGroup="add" />
protected void btnSaveComment_Click(object sender, EventArgs e)
{
AddComment();
}
I suspect that when you initially click an area above the button you're giving focus to the iframe (that is to say, the page within it), and on the second click the mouse can interact with the button.
On the other hand, if the page seems to be posting back but not actually doing anything until the second click, then it might well be related to the page lifecycle, as suggested in an answer comments by #AndroidHustle.
Edit:
To test the theory of whether or not the frame is focused, try giving it focus via script. Something like the following might help:
<script type="text/javascript">
document.getElementById("iFrameId").focus();
</script>
I had the same problem. Here is how I solved it:
$("#MainContent_Button1").hover(function (event) {
$("#MainContent_Button1").click()
});
Now it only takes 1 click, and the button functions like it's supposed to.
<asp:Button ID="Button1" runat="server" Text="Save Payment Plan" OnClick="Button1_Click" />
Related
im trying to hide div by clicking the button, but it does hide it for a second and return the div (looks like it refreshing page).here is my html code :
<div id="page">
<p>First Paragraph</p>
<p>Second Paragraph</p>
<p>Yet one more Paragraph</p>
<asp:Button ID="Button1" runat="server" Text="Button" />
</div>
and here is my jquery code:
$(document).ready(function () {
$("#Button1").click(function () {
$("#page").hide();
});
});
What Rick said in his answer AND you need to add Type="Button" to your button.
<Button ID="Button1" type="button">Button</button>
The default button type is submit, which will cause the page refresh. AND, as Rick mentioned, ASP buttons will also submit. So, you need to use an HTML button and set the type="button" attribute.
From MDN
The type of the button. Possible values are:
submit: The button submits the form data to the server. This is the default if the attribute is not specified, or if the attribute
is dynamically changed to an empty or invalid value.
reset: The button resets all the controls to their initial values.
button: The button has no default behavior. It can have client-side scripts associated with the element's events, which are
triggered when the events occur.
An ASP Button with runat="server" causes a server post-back. If you aren't going to be acting on that click from the server, just use a client-side button like:
<button id="Button1" type="button">Button</button>
Set the client id mode to static on the button, then it'll work. It's not working because that hasn't been specified so the name is changing.
<asp:Button ID="Button1" ClientIDMode ="Static" runat="server" Text="Button" />
If you wanted to disable the postback to simply hide something without processing anything, then just using a client side button is the best option.
this is my scenario:
I want to display a button(btnGenerate) based on the amount of rows displayed in my gridview. I've gotten it to display for a second then it goes away again. I'm using the onclientclick of one of my other buttons(btnImport). What I think is causing the problem is that on the same button(btnImport)'s OnClick event two gridview's performs for each a databind. Could this be the problem? I have written a script using javascript to perform this task from the client side. Is there a better way to do it? What can I do to fix my problem?
Here is my code that I have so far:
<asp:Button runat="server" ID="btnImport" Text="Load Data from File"
BackColor="#990000" ForeColor="White" nowrap OnClick="btnImport_Click"
style="display:none" OnClientClick="DisplayButtonGenerate()"/>
<asp:Button ID="btnGenerate" runat="server" Text="Generate New Stock Codes"
BackColor="#990000" ForeColor="White" OnClick="btnGenerate_Click"
style="display:none" />
I have two gridviews : ErrorsGrid that displays all the faulty records and InventoryGrid that displays the records that are correct. Like I said above, the idea is to display btnGenerate if ErrorsGrid has rowCount=0.
protected void btnImport_Click(object sender, EventArgs e)
{
InventoryGrid.DataBind();
ErrorsGrid.DataBind();
}
protected void btnGenerate_Click(object sender, EventArgs e)
{
FinalMessage.AppendLine(_InsertWrapper.PostData());
}
Here is the script:
<script language="javascript" type="text/javascript">
function DisplayButtonGenerate() {
var rowCount = <%=ErrorsGrid.Rows.Count %>;
var buttonGen = document.getElementById("<%=btnGenerate.ClientID%>");
if(rowCount == 0)
{
buttonGen.style.display = "block";
}
}
</script>
Your btnImport has server-side OnClient and client-side OnClientClick both set. I guess what's happening is the client-side is called first, shows the button, then the server-side one kicks in, the page gets refreshed from the server, and your button is hidden again. You can do it in one way or another, but not both:
Server-side: Remove the OnClientClick & style="display:none" & JavaScript, set the Visible property of the button to false, and in the code-behind click event on the server add:
if(ErrorsGrid.Rows.Count == 0)
btnImport.Visible = True;
Client-side: Return false from the JavaScript function to the OnClientClick:
OnClientClick="return DisplayButtonGenerate()"
function DisplayButtonGenerate() {
....
return false;
}
If you want to update InventoryGrid,ErrorsGrid grid controls in code after you click a button, you need to keep those in a UpdatePanel
<asp:UpdatePanel ID="upnl" runat="server" UpdateMode="Conditional">
<contenttemplate>
InventoryGrid,ErrorsGrid mark up
</contentTemplate>
<Triggers>
//set async trigger as btnImport
</Triggers>
</asp:UpdatePanel>
Let's breakdown your problem into steps.
you click on btnImport, it first calls the OnClientClick, does client side processing
and then does a full postback, goes to server side and processes its server side handler OnClick.
after the OnClick handler is processed, the page again renders, the unconditioned code in the btnGenerate display:none again runs, and the default state is again rendered.
you see the problem? even if you are manipulating certain logic in your clientClick, it all resets on page reload, because your btnImport is doing that.
Solutions:
there are couple of things I can suggest.
Use UpdatePanel to prevent Postback of the entire page or
make your btnImport a client side button altogether, and do a post using xhr or jQuery's ajax.
Set the visibility of btnGenerate on the server side itself
most simple would be the 3rd one i.e. remove the onclientclick event from the code and change your btnImport to do this:
protected void btnImport_Click(object sender, EventArgs e)
{
InventoryGrid.DataBind();
ErrorsGrid.DataBind();
//set visibility of btnGenerate in Page_Load also;
btnGenerate.Visible = ErrorsGrid.Rows.Count == 0;
}
and remove display:none from btnGenerate from client
There's no need for a JS function here.
Simply check the datasource for ErrorsGrid if count != 0 and if it's not just set the visibility of your button in codebehind.
If i've understood your req. correctly, setting 'Visbible' property of button to true or false should work. i.e btnGenerate.Visible=true/false. Initially you can set the button visibility as false then based on the record count you can modify it in the required event handler.
I did a lot of searching and cannot figure this out.
I have a ModalPopupExtender pop-up that I want to display when the user clicks a link DoSomething. The pop-up has a dropdown control that I then want to populate on the fly when the user asks to open the dialogue. This needs to happen server side via the code behind. Currently I am trying to do it via an OnClick event on the link but as soon as the link is tied to the ModalPopupExtender the link OnClick code is not executed.
Code snippet:
<asp:LinkButton ID="lnkDoSomething" runat="server" onClick="lnkDoSomething_Click">Do Something</asp:LinkButton>
<asp:ModalPopupExtender ID="mpelnklnkDoSomething" runat="server" BackgroundCssClass="modalBackground"
DropShadow="true" PopupControlID="lnkDoSomething"
PopupDragHandleControlID="pnlDragHandlerForlnkDoSomething"
TargetControlID="lnklnkDoSomething"></asp:ModalPopupExtender>
The problem is as soon as I set the ModalPopupExtender to the link the OnClick code does not execute. This obviously is by design but it doesn't make sense to me (naive) as if the user clicks the link the OnClick code should be executed.
Any ideas why this is not supported and what the correct solution is?
Attach the ModalPopupExtender to a dummy button and show the modal on the LinkButton's OnClick even from the code-behind:
Markup:
<asp:LinkButton ID="lnkDoSomething" runat="server" onClick="lnkDoSomething_Click">Do Something</asp:LinkButton>
<asp:Button id="dummyButton" runat="server" style="display:none;" />
<asp:ModalPopupExtender ID="mpelnklnkDoSomething" runat="server"
BackgroundCssClass="modalBackground" DropShadow="true" PopupControlID="controlToPopUpId"
PopupDragHandleControlID="pnlDragHandlerForlnkDoSomething"
TargetControlID="dummyButton"></asp:ModalPopupExtender>
Code-behind:
protected void lnkDoSomething_Click(Object sender, EventArgs e)
{
//do work
mpelnklnkDoSomething.Show();
}
I have an asp wizard on my page with three steps.
<asp:Wizard ID="wizardBestellen" runat="server" ActiveStepIndex="0" DisplaySideBar="False" onfinishbuttonclick="wizard_NextButtonClick" onnextbuttonclick="wizard_NextButtonClick" onpreviousbuttonclick="wizard_PreviousButtonClick">
<StartNavigationTemplate></StartNavigationTemplate>
<StepNavigationTemplate></StepNavigationTemplate>
<FinishNavigationTemplate></FinishNavigationTemplate>
<WizardSteps>
<asp:WizardStep runat="server" ID="step1" StepType="Start">
<uc1:control ID="uc1" runat="server" />
</asp:WizardStep>
<asp:WizardStep runat="server"ID="step2" StepType="Step">
<uc2:control ID="uc2" runat="server" />
</asp:WizardStep>
<asp:WizardStep ID="step3" runat="server" StepType="Finish">
<uc3:control ID="uc3" runat="server" />
</asp:WizardStep>
</WizardSteps>
</asp:Wizard>
Now every control has a next and a previous button which after the click validates your data and sends you to the next step. The buttons all look like:
<asp:LinkButton ID="bntPrevious" runat="server" CommandName="MovePrevious" CssClass="buttonOrange" CausesValidation="false"><span>Previous</span></asp:LinkButton>
<asp:LinkButton ID="btnNext" runat="server" CommandName="MoveNext" CssClass="buttonOrange" CausesValidation="true"><span>Next</span></asp:LinkButton>
So far it all works perfectly..
Now i wanted to disable the buttons after clicking on it and show a div with a loader image. So i created a div named divLoader and a javascript function which hides the div the buttons are in and shows the div with the loader.
function ToggleDiv(divButton, divLabel)
{
if (divButton.style.display == 'block')
{
divButton.style.display = 'none';
divLabel.style.display = 'block';
}
else
{
divButton.style.display = 'block';
divLabel.style.display = 'none';
}
}
But i can't get this to work. The ToggleDiv function works great in another situation, so thats not the problem.
I've tried calling the function from the OnClick attribute in the linkbutton but this gave me an error. I tried the OnClientClick, but this didn't work and i also tried setting the onclick attribute in the code behind, this also was a dead end.
Can anybody explain to me what i am doing wrong or is there another way to prevent users clicking the button twice?
Sounds like you're not getting the binding to work.
The first thing I would do is check the emitted control IDs by doing a view-source. Some implementation of the .NET framework add extra fluff to these control IDs, so can't guarantee that it will be the same as appears on the form.
Next, I would try some JavaScript late binding. If you have a JavaScript file, put it there. If not create one or add a JavaScript block to the foot of your form (create a new file for preference).
All this would be much easier with a JAvaScript lbrary such as jQuery, but for the moment lets assume you don't have one.
Add a window onload event handler
window.onload = function(){
//code to go here
}
Now add the click binding for your button:
window.onload = function(){
document.getElementById("***YOUR BUTTON ID***").onclick = function(){
ToggleDiv(this, document.getElementById("***YOUR LABEL ID***"));
}
}
I said this would be a little easer with jQuery, well, this is the equivalent implementation:
$(document).ready(function(){
$("#***YOUR BUTTON ID***").click(function(){
$(this).toggle();
$("#***YOUR LABEL ID***")).toggle();
});
});
The above sample removes the need for your ToggleDiv function entirely.
On a ASP.Net page, I am in front of a problem only with IE. Here is the description.
On a page, there is two buttons and one label. The first button is visible and calls a JS function on the click event. This JS function calls the click function of the second button. The second button has an C€ event handler on the click event. The C# event handler edit the label.
In Firefox : the label is correctly edited after the clicks.
In IE (8) : the label is not edited, despite the C€ event handler has been correctly hit.
Also, I observed, in IE, that the Page_Load event is called two times after the JS button click :
Page_Load
button2_OnClick => change of the Label Text
Page_Load => The Label Text is reset :(
In Firefox, the Page_Load is called only once.
My question is : how to make IE refresh correctly the page as Firefox does after a JS button click ?
Below is the sample test code :
1) Page ASPX
<head runat="server">
<title></title>
<script type="text/javascript">
function button1Click(sender, args) {
var button2 = document.getElementById("button2");
button2.click();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button runat="server" ID="button1" Text="Click-me!" OnClientClick="button1Click();" />
<asp:Button runat="server" ID="button2" Text="Second" OnClick="button2_OnClick" style="display:none" />
<p />
<asp:Label runat="server" ID="label1" Text="Init" />
</div>
</form>
</body>
</html>
2) C# code-behind :
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void button2_OnClick(object sender, EventArgs e)
{
label1.Text = "Changed";
}
}
The ID of your button will not be button1 or button2 when it's rendered. It will probably be something like ctl001_button1. Therefore your javascript will not work. In ASP.NET 4 you can override this behaviour by using an assigned ClientID.
<asp:Button runat="server" ID="button1" Text="Click-me!"
OnClientClick="button1Click();" ClientIDMode="Static" />
<asp:Button runat="server" ID="button2" Text="Second"
OnClick="button2_OnClick" style="display:none" ClientIDMode="Static" />
As an aside, this alludes to the main problem with ASP.NET Winforms - it tricks developers into thinking that the web is a connected environment.
What actually happens when you click an <asp:Button /> element by default is that a postback is invoked. I.e. Your browser sends a request to the server for a new page. It sends up something called ViewState which is how the server knows what you've done and what to render. There is no "event" handled as such.
I think the problem is with the way you are trying to get the hidden button
var button2 = document.getElementById("button2");
maybe change this to
var button2 = document.getElementById("<%= button2.ClientID %>");
After the buttons are rendered in the browser, the ID is changed by the ASP.Net engine, and not the same as your source.
http://msdn.microsoft.com/en-us/library/system.web.ui.control.clientid.aspx
Hope this helps.