I am using javascript to set asp:hiddenfield to '1' but not getting set.
I am setting it like this:
<script type="text/javascript">
function uploadComplete(sender, args) {
var myHidden = document.getElementById('<%= HdnFieldEmployeePicture.ClientID %>');
myHidden.value = '1';
}
</script>
from:
<asp:AsyncFileUpload ID="FileUpload1" OnClientUploadComplete="uploadComplete" ClientIDMode="AutoID" UploaderStyle="Modern" runat="server"/>
<asp:HiddenField ClientIDMode="Static" ID="HdnFieldHasFileUploaded" runat="server" />
I am checking it on server side:
if (HdnFieldHasFileUploaded.Value == "1")
{
but not set to 1.
AsyncControl and hidden field are inside UpdatePanel.
Your javascript code will not work because javascript method bindings get broken when your page is partially submitted using asp.net update panel. You need to add following lines of code to get it back to work.
<script type="text/javascript">
function EndRequestHandler(sender, args) {
// bind your methods here
}
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
</script>
Related
Trying to trigger javascript function on click of asp.net button , but it won't work. I tried usesubmitbehaviour=false and trying adding return to function also.
Here is my code snippet
<script type="text/javascript">
function checkout() {
alert("test")
var stripe = Stripe("*********")
var button = document.getElementById("Button1");
stripe.redirecttocheckout({
sessionId = document.getElementById('<%= test.ClientID %>').value
})
}
</script>
and function call from button click of asp.net
<asp:Button ID ="Button1" runat ="server"
class="btn btn-secondary bt-dark bt-darkregister"
style="width:210px"
Text="Continue to secure payment"
OnclientClick=" return checkout()" />
Why do you use OnclientClick and not OnClick?
You can try using it in thr following manner and tell me what happens?
<asp:Button id="Button1"
Text="Click here for greeting..."
OnClick="GreetingBtn_Click"
runat="server"/>
You have to provide more information.
Move your script block to inside of the form /form tags
And
OnClientClick="checkout();return false;"
And you js code looks wrong too.
Try this:
<script>
function checkout() {
alert("test");
}
</script>
So your js code is missing the ending ";" on each line of js
I have just today learned how to call backend functions from Javascript and my first Javascript function worked. However, when I tried the very same function and calls on a different front end webpage of the same project for the same button, which is delete, the Javascript function is no longer being called. This is so weird. Here is the Javascript function:
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<script type = "text/javascript" >
function watchdelete() {
if (drpManufacturer.SelectedItem.Text != "") // If there is a selected Manufacturer
{
return confirm("Are you Sure You want to delete this Dimension Detail?");
}
else
{
alert("Please select a Manufacturer first before deleting");
return false;
}
}
</script>
<asp:ScriptManager ID="scripman1" runat="server" EnablePageMethods="True">
</asp:ScriptManager>
Here is the OnClientClick call for the delete button:
<asp:Button ID="btnDimensionDel" runat="server" Text="Delete" OnClientClick = " return watchdelete();" OnClick="btnDimensionDel_Click" />
Am I doing something wrong? All I did was add a few lines to a Javascript function that was previously working on another page. I have a feeling there is some syntax error in this Javascript function but you will have to excuse me as I am new to Javascript. Can one use a boolean type for return values in Javascript? Thank you very much in advance.
Use this code:
<script type = "text/javascript" >
function watchdelete() {
var manufacturer = document.getElementById('<%:drpManufacturer.ClientID%>');
var strManufacturer = manufacturer.options[manufacturer.selectedIndex].value;
if (strManufacturer) // If there is a selected Manufacturer
{
return confirm("Are you Sure You want to delete this Dimension Detail?");
}
else {
alert("Please select a Manufacturer first before deleting");
return false;
}
}
</script>
remove return statement:
<asp:Button ID="btnDimensionDel" runat="server" Text="Delete"
OnClientClick="watchdelete()" OnClick="btnDimensionDel_Click" />
i have a function like this:
<script type="text/javascript" >
function postBack(e) {
var lnk=document.getElementById('<%=e.getAttribute("ClientID") %>');
lnk.click();
};
</script>
and have a link button like this:
<asp:LinkButton onfocus="postBack(this);" id="lnk_home" runat="server"
AccessKey="h" onclick="lnk_home_Click">Home</asp:LinkButton>
I want to redirect page when i press Alt+h
But it does not work. I get the following error when i press Alt+h:
[Compiler Error Message: CS0103: The name 'e' does not exist in the current context]
Any suggestions about how to fix this problem? Thanks
UPDATE**
Server side code:
protected void lnk_home_Click(object sender, EventArgs e)
{
home home_view = LoadControl("home.ascx") as home;
Panel pnl_view = (Panel)ContentPlaceHolder1.FindControl("pnl_view");
//pnl_view.Controls.Clear();
pnl_view.Controls.Add(home_view);
}
You don't need a separate JavaScript function, just use this.click():
<asp:LinkButton onfocus="this.click()" id="lnk_home" runat="server" AccessKey="h" onclick="lnk_home_Click">Home</asp:LinkButton>
Or if you do want to use a separate function (perhaps to perform some common routine on multiple LinkButtons) invoke click method on passed object itself:
<asp:LinkButton onfocus="postBack(this);" id="lnk_home" runat="server" AccessKey="h" onclick="lnk_home_Click">Home</asp:LinkButton>
<script type="text/javascript" >
function postBack(oLink) {
// some common code
oLink.click();
};
</script>
UPDATE When you actually click the link with the mouse - event may fire twice, so you need to limit it to one click:
<asp:LinkButton onfocus="this.AllowClick=true;this.click();" OnClientClick="if (this.AllowClick) {this.AllowClick=false} else {return false}" id="lnk_home" runat="server" AccessKey="h" onclick="lnk_home_Click">Home</asp:LinkButton>
In my Vb .net code-behind (Visual Studio 2005), in a method fired by click event:
hdnUrl and hdnParameters are hiddenFields
Protected Sub btnExample_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExample.Click
.
.
.
hdnUrl.Value = "Mypage.aspx?i=" & SomeCveDefinedInCodeBehind.Tostring & "&u=" & OtherCveDefinedInCodeBehind.Tostring
hdnParameters.value = "resizable: no; scroll: no; center: yes; dialogHeight: 525px; dialogWidth:750px; status: no;"
ScriptManager.RegisterClientScriptBlock(Page, Page.GetType, DateTime.Now.ToString, "<script type='text/javascript'> ShowWindow(); </script>", False)
.
.
.
In my page:
<asp:Content ID="Content3" ContentPlaceHolderID="cph3" runat="Server">
.
.
.
<asp:HiddenField ID="hdnUrl" runat="server" Value="" />
<asp:HiddenField ID="hdnParameters" runat="server" Value="" />
<asp:HiddenField ID="hdnResult" runat="server" Value="" />
<script language="javascript" type="text/javascript">
function ShowWindow()
{
alert('i am here');
var url = document.getElementById('<%= hdnUrl.ClientID %>').value;
var Parameters = document.getElementById('<%= hdnParameters.ClientID %>').value;
//For test:
alert(url); //------ i need to get here: "My page.aspx?...", but i always get: ""
alert(parameters); // i need to get here my parameters, but i always get: ""
.
.
.
var dialogWin = window.showModalDialog(url, "some text", parameters); //showModalDialog window, will return a data that i need in CodeBehind
document.getElementById('<%= hdnResult.ClientID %>').value=dialogWin.result;
//Then i could manage the result, in code-behind
}
</script>
</asp:Content>
Only if in the hidden field definition i set:
<asp:HiddenField ID="hdnUrl" runat="server" Value="My text" />
i can get this text in the javascript alert, but i need define the text in code-behind
Thanks for your Help and suggestions.
is there another way for pass url and parameters, to the window.showModalDialog???
or another way for get the result of the window.showModalDialog in code.behind???
Watch the casing on your Parameters variable. Also try using RegisterStartupScript instead of RegisterClientScriptBlock. The difference is the former will put your javascript at the bottom of the page while the latter puts it at the top. This will cause the script to run before the document it fully loaded.
ScriptManager.RegisterStartupScript(Page, Page.GetType, DateTime.Now.ToString, "<script type='text/javascript'> ShowWindow(); </script>", False)
I have an ASP.NET page (WebForm1) that opens a modal dialog WebForm2 (via OpenForm2() js function) for some further processing. Upon closing the dialog I just update the UpdatePanel via JavaScript. Now the problem is, during this js call it doesn't block the UI.
This is only happening when I am calling the OpenForm2 js method from the server side (Button1_Click). As the UI already went into block mode, upon closing the WebForm2 it doesn't wait for the completion of partial postback (JavaScript) and unblocks the UI.
If I directly call the OpenForm2 js function in OnClientClick tag of the button (Button 2 in the sample), it works well and keeps blocking the UI till completion of postback.
I tried wrapping the partial postback js code in an add_endRequest, but in that case it keeps calling the refreshUpdatePanel() js method, hence blocking/unblocking the UI keeps going on. May this be happening due to two add_endRequest used on a page in that case?
Any assistance is highly appreciated in this regard.
NOTE: I have used jQuery blockUI for blocking the page during partial postbacks.
The code sample for the WebForm1 page is as follows. (The WebForm2 aspx page just have a button to close the dialog and a related js function).
WebForm1.aspx
<head runat="server">
<title></title>
<script src="js/jquery-1.6.1.min.js" type="text/javascript"></script>
<script src="js/jquery.blockUI.js" type="text/javascript"></script>
<script type="text/javascript">
function OpenForm2() {
var url = "WebForm2.aspx";
var width = 950;
var height = 455; // screen.availHeight - (120 + 65);
// open modal dialog
obj = window.showModalDialog(url, window, "dialogWidth:" + width + "px; dialogHeight:" + height + "px; center:yes");
// partial postback to reflect the changes made by form2
refreshUpdatePanel();
//Sys.WebForms.PageRequestManager.getInstance().add_endRequest(refreshUpdatePanel);
// ** here it doesn't wait for the completion and unblocks the UI **
}
function refreshUpdatePanel() {
//window.__doPostBack('UpdatePanel1', '1');
// a timeout/delay before a client side updatepanel postback. That compelled the UI to go in blocking again with a little screen flickering.
setTimeout('__doPostBack("<%= UpdatePanel1.ClientID %>", "1")', 0);
}
$(document).ready(function () {
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_initializeRequest(InitializeRequest);
prm.add_endRequest(EndRequest);
$.blockUI.defaults.css = {};
function InitializeRequest(sender, args) {
// Whatever you want to happen when the async callback starts
$.blockUI();
}
function EndRequest(sender, args) {
// Whatever you want to happen when async callback ends
$.unblockUI();
}
});
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" OnLoad="UpdatePanel1_Load">
<ContentTemplate>
<asp:Label ID="Label2" runat="server" Text=""></asp:Label><br />
<asp:Button ID="Button1" runat="server" Text="Button 1" OnClick="Button1_Click" />
<asp:Button ID="Button2" runat="server" Text="Button 2" OnClientClick="OpenForm2();return false;" />
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
WebForm1.aspx.cs
protected void Button1_Click(object sender, EventArgs e)
{
// some server side processing here
System.Threading.Thread.Sleep(1000);
// then calling javascript function to open form2 as modal
ScriptManager.RegisterClientScriptBlock(UpdatePanel1, UpdatePanel1.GetType(), "Button1Click", "OpenForm2();", true);
}
protected void UpdatePanel1_Load(object sender, EventArgs e)
{
string parameter = Request["__EVENTARGUMENT"];
if (parameter == "1")
{
System.Threading.Thread.Sleep(3000);
Label2.Text = DateTime.Now.ToString();
}
}
use
function refreshUpdatePanel() {
__doPostBack"<%= UpdatePanel1.ClientID %>", '1');
}
instead of
function refreshUpdatePanel() {
window.__doPostBack('UpdatePanel1', '1');
}
thank you