I have written code for javascript but it is not called any how. I tried to call both form html side and also by assigning attribute from page load event but it is not at all called.
This is the code for my javascript.
function rdbantiplatelet_onClick(thiscontrol, trName) {
alert('hi');
var RB1 = thiscontrol;
var radio = RB1.getElementsByTagName("input");
var trDose = document.getElementById(trName.toString());
// var RB1 = document.getElementById("<%=this.rdbantiplatelet.ClientID%>");
// var radio = RB1.getElementsByTagName("input");
// var tblAntiplatelet = document.getElementById("<%=tblAntiplatelet.ClientID %>");
for (var i = 0; i < radio.length; i++){
if (radio[i].checked){
trDose.style.display = "";
return true;
}
else{
trDose.style.display = "none";
return true;
}
}
return false;
}
This is the code to call javascript written in page_load event..
rdbantiplatelet.Attributes.Add("OnClick", "return rdbantiplatelet_onClick(this,'" + trDose.ClientID.ToString() + "');");
Try an alert() first to make sure your onclick is firing, then try your rdbantiplatelet_onClick() function:
rdbantiplatelet.Attributes.Add("OnClick", "alert('I am working');");
First of all for your reference here is a list of standard html events
http://www.w3schools.com/tags/ref_eventattributes.asp
try adding something like this to the html radiobutton element
onchange="alert('on change fired');"
and
onclick="alert(' on click fired');
so you can make sure you are picking up the right event.
Once you have the right event then replace the alert call to your method
which would be something like this
onchange="rdbantiplatelet_onClick(this, this.parent.id)"
...you might have to change the 'this.parent.id'
Make sure you are running through a good web browser for development FireFox with the firebug plug-in is great for this stuff.
You are add click event to html table that holds radiobuttons. Use script below:
foreach (ListItem item in rdbantiplatelet.Items)
{
item.Attributes.Add("onclick", "return foobar(this);");
}
Related
I have button called sales and it have a JavaScript popup when I click on cancel it postback and the values in the form are inserted but when i click on ok it does not post back and the values in the form does not go in the database ( the JavaScript button is actually print call and when button is clicked it asks for print when print dialog box is open it does not post back and data is not inserted in the database)
here is the javascript code
function confirmAction(printable) {
var r = confirm("You want to Print Invoice?");
if (r == true) {
var printContents = document.getElementById(printable).innerHTML;
var originalContents = document.body.innerHTML;
document.body.innerHTML = printContents;
window.print();
document.body.innerHTML = originalContents;
__doPostBack();
}
else {
__doPostBack();
}
}
here is the code for button click
<asp:Button ID="btnaddsale" runat="server" Text="Sale" OnClick="btnaddsale_Click" OnClientClick="javascript:confirmAction('printable')"/>
Ok, couple of notes for you:
You want a postback in either case.
Your <asp:Button> will automatically do a postback either way, so you don't need to call __doPoskBack(); in this scenario.
Major issue here is that, if you want a postback, it will happen immediately when the function exits, effectively canceling out the print dialog too soon. To avoid this, we will use a JavaScript trick that will check if the document has focus, and only when it does (when user exits print dialog in the browser) will we return and allow the postback to occur.
To fix the issue,
First: Make the function return true; when user cancels, and wait for focus and then return true if the user wants to print:
function confirmAction(printable) {
var r = confirm("You want to Print Invoice?");
if (r == true) {
var printContents = document.getElementById(printable).innerHTML;
var originalContents = document.body.innerHTML;
document.body.innerHTML = printContents;
window.print();
document.body.innerHTML = originalContents;
// Check focus after user exits print dialog and then return true for the postback
var document_focus = false;
$(document).focus(function () { document_focus = true; });
setInterval(function () { if (document_focus === true) { return true; } }, 500);
}
else {
return true;
}
}
Then, change the JavaScript code to use the return statement in the OnClientClick event:
<asp:Button ID="btnaddsale" runat="server" Text="Sale"
OnClick="btnaddsale_Click"
OnClientClick="javascript:return confirmAction('printable')"/>
Update based on comments and your changed requirement:
Here's a snippet to make the script pop up after the postback. So you will insert values to database, and then add the print script / confirm dialog on page load using Page.ClientScript.RegisterStartupScript()
Note I don't recommend to embed the script in your C# code, so I'd suggest to take your confirmAction() function and place it (if not already) into a separate "yourScripts.js" file and then just call the function name when the page is loaded using jQuery. Here's an example:
In your master page or page header: This file should contain the confirmAction() function
<script type="text/javascript src="path/to/yourScriptsFile.js">
Then, in code-behind:
protected void Page_Load(object sender, EventArgs e)
{
// Only display script on PostBack, not initial page load
if (IsPostBack)
{
Page.ClientScript.RegisterStartupScript(
this.GetType(),
"confirmAction",
#"<script type=""Text/Javascript"">$(document).ready(function() { confirmAction('printable'); });</script>");
}
}
Also note, since you will NOT want a postback now, the confirmAction function should no longer return true; or use the trick code I posted above, and will just return false:
function confirmAction(printable) {
var r = confirm("You want to Print Invoice?");
if (r == true) {
var printContents = document.getElementById(printable).innerHTML;
var originalContents = document.body.innerHTML;
document.body.innerHTML = printContents;
window.print();
document.body.innerHTML = originalContents;
}
return false;
}
I've got a problem with adding some controls into a Panel(which gets "PopUpped" by a ModalPopupExtender) and add a CheckedChanged-EventHandler.
First of all, when user clicks on a button, this happens inside the CreatePanelChoose() function:
foreach (ListItem item in lbSupplier.Items)
{
string cbid = "cb" + i;
CheckBox cb = new CheckBox();
cb.ID = cbid;
cb.Text = item.Text;
cb.AutoPostBack = true;
AjaxControlToolkit.MutuallyExclusiveCheckBoxExtender mecbe = new AjaxControlToolkit.MutuallyExclusiveCheckBoxExtender();
mecbe.ID = "mecbe" + cbid;
mecbe.TargetControlID = cbid;
mecbe.Key = "SupplierKEY";
mecbe.BehaviorID = mecbe.ID + i;
//Also adding a Label
phModalPopupExtender.Controls.Add(new LiteralControl("</br>")); //phModalPopupExtender is a PlaceHolder
phModalPopupExtender.Controls.Add(cb);
phModalPopupExtender.Controls.Add(mecbe);
phModalPopupExtender.Controls.Add(lbl);
AsyncPostBackTrigger trigger = new AsyncPostBackTrigger();
trigger.ControlID = cbid;
trigger.EventName = "CheckedChanged";
UpdatePanelMatrix.Triggers.Add(trigger);
i++;
ButtonOK.Enabled = false;
}
lblText.Text = "Select one Supplier";
ModalPopupExtender1.Show();
Then i add the EventHandler in the Page_LoadComplete:
As you can see it also gets asigned to the control (I think).
The ModalPopup shows up correctly, but if I click one of the CheckBox, then it just closes it without going into cb_CheckedChanged, but it makes a Async postback ...
If I check Request.Form["__ASYNCPOST"] its true and Request.Form["__EVENTTARGET"] is also correct. (It gives me the unique id!)
Request.Form["__EVENTARGUMENT"] is empty.
I think I also need to say that I use a masterpage.
The problem shouldn't be the lifecycle of the page, because msdn says:
LoadComplete
Raised at the end of the event-handling stage.
Use this event for tasks that require that all other controls on the page be loaded.
Its the onliest place it makes me think it would be right.
Btw: yes i looked trough the topics here allready, but nothing helped me ... (google fo sure also)
Edit 1:
if (IsPostBack)
{
if (recreating == true)
{
CreatePanelChoose();
}
}
In CreatePanelChoose i do the foreach now everytime when its a postback! But it still doesnt fire cb_ChangedChecked ...
Edit 2:
MSDN-Page-Lifecycle also says:
PreInit
Raised after the start stage is complete and before the initialization
stage begins.
Use this event for the following:
Create or re-create dynamic controls.
So i tried to recreate the Panel there. But i dont have the ListItems there to get the values ... ?!
Okay, gave up ...
If someone would still have an answer, it would be great!
Right now I dont use the OnCheckedChanged-Event of the CheckBoxes anymore.
I just let them select a CheckBox and on the OnClick of the ButtonOk I loop through the CheckBoxes and check which one is selected.
I have a method that add's an onclick event too an imagebutton.
But sometimes you have to press the button multiple times before the "pop-up" window opens.
Any idea why this happens?
this is my code were I add the event to my imagebutton:
private void AddProjectDetails()
{
ImageButton imgBtn;
HiddenField hfld;
String ProjectNumber;
for (int i = 0; i < GridViewProperties.Rows.Count; i++)
{
hfld = GridViewProperties.Rows[i].FindControl("HiddenProjId") as HiddenField;
imgBtn = GridViewProperties.Rows[i].FindControl("ibtnShowExtra") as ImageButton;
ProjectNumber = hfld.Value;
imgBtn.Attributes.Add("onclick", "window.open('ProjectDetails.aspx?ProjectNumber=" + Server.UrlEncode(ProjectNumber) + "','Graph','height=590,width=600,left=50,top=50,scrollbars=yes'); return true;");
}
}
Try returning false from the javascript. This will prevent postback. Some times the postback can be faster then the windows.open, and in this case I don't think you want it.
Another solution is using an <a href='...' >image</a> instead of the imagebutton
Why are you using return true inside you java-script function.
Do you need postback on your page.
If not use return false.
I will also suggest you to write a javascript function and call it as follows
function OpenPopUp(projectNumber)
{
window.open("ProjectDetails.aspx?ProjectNumber="+ projectNumber
,'Graph','height=590,width=600,left=50,top=50,scrollbars=yes');
return false;
};
and call it inside your c# code
imgBtn.Attributes.Add("onclick", "return OpenPopUp('"+Server.UrlEncode(ProjectNumber)+"');");
Like Stefano and Shekhar said, you must not use return true for LinkButtons, Imagebuttons, unless you want the page post back.
You can also use this way:
<asp:ImageButton ID="ButtonOpenProject" runat="server" ImageUrl="~/Images/OpenProject.png" OnClientClick="return OpenProject('"<%# ProjectNumber %>"');" />
And in your JavaScript script you do something like this:
function OpenProject(ProjectNumber){
window.open('ProjectDetails.aspx?ProjectNumber=' + ProjectNumber + ','Graph','height=590,width=600,left=50,top=50,scrollbars=yes');
return false;
}
Hope this help.
I am trying to hide some divs using Javascript but i think the post back keeps reloading the page.
To make things more complicated my buttons are added programmatically by my code behind.
foreach (string line in thefilters)
{
Button newButton = new Button();
newButton.ID = Convert.ToString(line);
newButton.Text = Convert.ToString(line);
newButton.CssClass = "tblbutton";
//newButton.Attributes.Add("onclick", "hide_div("+newButton.ID+")");
newButton.OnClientClick = "return hide_div('" + newButton.ID + "')";
pnl_left.Controls.Add(newButton);
}
My javascript is located in the header as follows.
<script type="text/javascript">
function hide_div(filter) {
var pnl_right = document.getElementById("pnl_right");
var listofelements = pnl_right.getElementsById("div");
for (var i = 0; i < listofelements.length; i++) {
if (listofelements[i].id.indexOf(filter) == 0) {
document.getElementById(listofelements[i].id).style.display = 'inline';
}
else {
document.getElementById(listofelements[i].id).style.display = 'none';
}
}
return false;
}
I may have issues in the javascript for what i want to achieve but i am confident that if i can stop the postback then i can solve the javascript myself..
Thanks for any suggestions in advance.
You have not showed in which event you are adding controls. But I am assuming from your problem that you are doing this in Page_Load. If yes, try and move in OnInit event.
Second, in Page_Load you need to check
if(!IsPostBack)
{
//your code for adding controls
}
Hope that helps.
I write script like this in my .cs file :
StringBuilder script = new StringBuilder();
script.Append("<script type=\"text/javascript\"> function submitform(){");
script.Append(" document.forms['" + ((HtmlGenericControl)frm).Attributes["id"] + "'].submit();} </");
script.Append("script>");
How can i call this function in the OnClientClick of my link button ?
LinkButton hl_process = new LinkButton();
hl_process.OnClientClick = ""
Edit1:
protected Control CreateCommForm()
{
HtmlGenericControl frm = new HtmlGenericControl("form");
frm.Attributes.Add("id", "sal");
frm.Attributes.Add("method", "post");
frm.Attributes.Add("action", "https://------");
/////////////////////////////////////////
HtmlGenericControl hdn_sal_a = new HtmlGenericControl("input");
hdn_sal_a.Attributes.Add("id", "hdn_sal_a");
hdn_sal_a.Attributes.Add("name", "hdn_sal_a");
hdn_sal_a.Attributes.Add("type", "hidden");
hdn_sal_a.Attributes.Add("value", Session["emp_num"].ToString());
/////////////////////////////////////////
HtmlGenericControl hdn_sal_b = new HtmlGenericControl("input");
hdn_sal_b.Attributes.Add("id", "hdn_sal_b");
hdn_sal_b.Attributes.Add("name", "hdn_sal_b");
hdn_sal_b.Attributes.Add("type", "hidden");
hdn_sal_b.Attributes.Add("value", Session["user_name"].ToString());
frm.Controls.Add(hdn_sal_a);
frm.Controls.Add(hdn_sal_b);
column1.Controls.Add(frm);
return frm;
}
separate the concerns The Visual part your application shouldn't be affected if you move your app to java or ruby. that's what separate of concerns is.
write the client script in the client, not in the cs file:
$('#<%= hl_process.ClientID %>').click(function(){
...
$('#formId').submit();
// if the button inside the form:
this.form.submit(); // HTML5
// Or:
$(this).closest('form').submit();
// if the button not inside the form :
var class = $(this).attr('class');
$('form.' + class).submit();
});
Use jquery to bind to the click event instead of doing this on the server side:
Submit Me
then in javascript something like:
<script type="text/javascript">
$('.blah').click(function() {
document.forms[0].submit();
});
</script>
Edit:
While you can generate UI elements with codebehind it's not quite the asp.net way. Use repeaters if you must repeat the generation of controls. Actually, creating multiple forms is not the asp.net way either, as it assumes only one form running at the server context and everything else binds to an event on submission. Anyways, it seems you're still learning asp.net and probably coming form PHP or something similar.
To accommodate your request, I'd advice to stay away from from generating JS on the server side. Give different class names to your forms and use the same method above. You don't need a LinkButton to submit the form, a simple anchor <a> fits the bill.
You can use the ClientID property (if you don't use classes), but you must first attach the parent control to the page for the algorithm to kick in.
So, your code would be something like:
protected Control CreateCommForm()
{
...
column1.Controls.Add(frm);
HtmlGenericControl a = new HtmlGenericControl("a");
a.Attributes["onclick"] = "$('#" + frm.ClientID + "').submit();";
a.InnerText = "Submit me";
frm.Controls.Add(a);
return frm;
}
The alternative way (better separation of concerns)
protected Control CreateCommForm()
{
...
column1.Controls.Add(frm);
HtmlGenericControl a = new HtmlGenericControl("a");
a.Attributes["class"] = "submitter";
a.InnerText = "Submit me";
frm.Controls.Add(a);
return frm;
}
And in javascript we find the parent form and submit it (this can be in a static js file):
<script type="text/javascript">
$('.submitter').click(function(
$(this).parents('form').submit();
));
</script>