<script type="text/javascript">
function GetValue3(id) {
text1 = documnet.getElementById(input parameter from cs file);
alert("this is from cs file");
//database transactions here <-------method1
}
$(function () {
button1 = document.getElementById(input parameter from aspx file);
$("[id*=Button1]").on("click", function () {
alert("this is from aspx file");
//database transactions here <-------method2
})
})
</script>
My question is that there are two procedures for database transactions, first from taking parameters from aspx.cs code befind file and second from aspx file.
In my code i want to do database transactions using second approach (by using parameters from aspx.cs code behind) because it is required in my coding.
please guide me how can i build this approach.
not sure what you are trying to achieve but you need to differentiate between client events and server events
to get element in JS you can get its ID from 'ClientID'
ASPX file:
<asp:TextBox ID="txtTest" OnTextChanged="txtTest_TextChanged" runat="server" AutoPostBack="true" ></asp:TextBox>
<asp:Button ID="btn1" OnClick="btn1_Click" runat="server" Text="Click" />
<script type="text/javascript">
function textFromTextBox() {
var text1 = documnet.getElementById('<%= this.txtTest.ClientID %>');
}
</script>
aspx cs file
protected void btn1_Click(object sender, EventArgs e)
{
var text = txtTest.Text;
}
protected void txtTest_TextChanged(object sender, EventArgs e)
{
var updatedText = txtTest.Text;
}
EDIT:
you cannot attach code behind method to ordinary html element. You can only attach javascript events to these elements or inputs. If its the case then its irrelevant if you are using asp.net web forms, python, ruby on backend server.
<input type="button" id="sbutton" value="Save" />
<script type="text/javascript">
(function (){
documnet.getElementById('sbutton').addEventListener("click", function(){ //do your crud operation });;
})
()
</script>
How can I validate that the file selected in AjaxFileUpload is already uploaded or are Pending
For eg:
I want to validate for those file which are still pending to be uploaded.
Here is my .aspx page code
<form id="form1" runat="server">
<asp:ToolkitScriptManager runat="server">
</asp:ToolkitScriptManager>
<asp:AjaxFileUpload ID="AjaxFileUpload1" runat="server"
Width="400px" OnUploadComplete="OnUploadComplete" Mode="Auto" />
</form>
.aspx.cs code is
protected void OnUploadComplete(object sender, AjaxControlToolkit.AjaxFileUploadEventArgs e)
{
string fileName = Path.GetFileName(e.FileName);
AjaxFileUpload1.SaveAs(Server.MapPath("~/uploads/" + fileName));
}
Suppose I had already uploaded 2 files and then after I add a new file to get upload but How can I validate that 2 files are uploaded and the new placed file is not uploaded.
I need to validate this from java script
I need to validate this on any button onclientclick event.
Resolved with below javascript
function validateImageUploaded() {
if ($(".ajax__fileupload_fileItemInfo").length > 0) {
if ($("div.ajax__fileupload_fileItemInfo").children('div').hasClass("pendingState"))
{
alert("found");
return false;
}
}
else {
alert('select your file');
return false;
}}
You can do this using .children and .hasClass
$("div.ajax__fileupload_fileItemInfo").children('div').hasClass("pendingState")
I have created a user control which actually creates an empty dialog box for application form. I wanted to render this user control on the click event of a button(like we render partial views). I have an .aspx page that contains a button. On clicking the button the user control that creates a dialog, opens up. Below is the jquery code written to open the dialog in a user control:
Jquery
createAliasPopUpForm: function (rowNumberId) {
// debugger;
var self = this;
var dat = $("input[id*='hdnAliasRecordmetaData']").val();
self.metaDataColumns = JSON.parse(dat);
//debugger;
// now bind update data to pop up
if (self.metaDataColumns.length > 0) {
if (rowNumberId != 'undefined' && rowNumberId != null) {
self.rowNumber = rowNumberId;
// fill alias record to meta data
var listdata = $("input[id*='hdnAliasRecordList']").val();
var aliasList = JSON.parse(listdata);
if (aliasList.Rows.length > 0) {
$.each(aliasList.Rows, function (i, val) {
if (this.RowNumber == rowNumberId) {
self.fillAliasRecord(self.metaDataColumns, this.Columns);
return false;
}
});
}
}
else {
// right now cloumn list has MDM record value so need to clear that value only
$.each(self.metaDataColumns, function (i, val) {
this.Value = '';
});
}
// sort array
//self.metaDataColumns.sort(common.dynamicSortMultiple("GroupOrder", "MetadataId"));
self.metaDataColumns.sort(common.dynamicSortMultiple("GroupOrder", "ColumnNumber"));
self.createPopupHtml(self.metaDataColumns, rowNumberId);
self.init();
$('#popUpHeader').find('h4').remove();
$('#popUpHeader').append(' <h4 class="modal-title" >Alias Record</h4>');
$("#updateConfirmPopUp").dialog({
autoOpen: true,
width: 600,
resizable: false,
draggable: false,
modal: true,
show: { effect: 'blind' }
});
}
},
userControl
<%# Control Language="C#" AutoEventWireup="true" CodeFile="AddAlias.ascx.cs" Inherits="OCM.Phoenix.WebToolsFramework.Server.Modules.MDMAdmin.AddAlias" %>
<script language="javascript" type="text/javascript" src='<%= ResolveClientUrl("~/scripts/jquery-1.4.2.min.js") %>'></script>
<script language="javascript" src="../Scripts/jquery.js" type="text/javascript"></script>
<script language="javascript" src="../Scripts/jquery-ui.js" type="text/javascript"></script>
<script language="javascript" src="../Scripts/bootstrap.min.js" type="text/javascript"></script>
<script language="javascript" src="../Scripts/Common.js" type="text/javascript"></script>
<script language="javascript" src="../Scripts/AdminEdit.js" type="text/javascript"></script>
<asp:HiddenField ID="hdnAliasRecordmetaData" runat="server" />
<asp:HiddenField ID="hdnAliasRecordList" runat="server" />
<script>
$(function () {
adminEditForm.createAliasPopUpForm();
});
</script>
code behind file just contains the load event
aspx page
<%# Page Language="C#" AutoEventWireup="true" CodeFile="AddAliasPage.aspx.cs" Inherits="Modules_MDMDataHub_AddAliasPage" %>
<%# Register Src="UserControls/AddAlias.ascx" TagPrefix="uc" TagName="alias" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<script src="Scripts/jquery.js"></script>
<script src="Scripts/jquery-ui.js"></script>
<script src="Scripts/AdminEdit.js"></script>
<body>
<form id="form1" runat="server">
<div>
<uc:alias ID="alias" runat="server" />
<br />
<asp:button ID="btn1" OnClick="btn1_Click" runat="server"> </asp:button>
</div>
</form>
</body>
</html>
Although, I have created the click event of the button, that calls the below function to render the html of the user control. but its actuaaly not working as it keeps giving me an errer as the hdnmetadatavalue must be inside the form tag. I did it but still i get the error. Am i doing something wrong here? Please help
private string RenderControl()
{
var sb = new System.Text.StringBuilder();
using (var stWriter = new System.IO.StringWriter(sb))
using (var htmlWriter = new HtmlTextWriter(stWriter))
{
var p = new Page();
var ctrl = (AddAlias)p.LoadControl("~/Modules/MDMDataHub/UserControls/AddAlias.ascx");
ctrl.Visible = true;
// do your own init logic if needed
p.Controls.Add(ctrl);
ctrl.RenderControl(htmlWriter);
return sb.ToString();
}
}
By reviewing your code:
var ctrl = (AddAlias)p.LoadControl("~/Modules/MDMDataHub/UserControls/AddAlias.ascx");
// ... other lines
ctrl.RenderControl(htmlWriter);
I assume you are trying to call RenderControl method for user control to HTML rendering, where the page will raise form tag exception if the user control was rendered outside defined form tag with runat="server".
Use Page.VerifyRenderingInServerForm method on page code behind to ensure all user controls render properly:
public override void VerifyRenderingInServerForm(Control control) {
// nothing to override here
}
public override boolean EnableEventValidation {
get { return false; }
}
Reference: UserControl's RenderControl is asking for a form tag in (C# .NET)
I have a simple contact form in aspx.
I want to validate the reCaptcha (client-side) before submitting the form.
Please help.
Sample code:
<%# Page Language="VB" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="Default2" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Test Form</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.11.2/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.11.2/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css">
<script src="https://www.google.com/recaptcha/api.js" async defer></script>
<script>
$("#cmdSubmit").click(function () {
//need to validate the captcha
});
</script>
</head>
<body>
<form id="form1" runat="server">
<label class="clsLabe">First Name<sup>*</sup></label><br />
<input type="text" id="txtFName" name="txtFName" class="clsInput" /><br />
<div class="g-recaptcha" data-sitekey="my_key"></div>
<img id="cmdSubmit" src="SubmitBtn.png" alt="Submit Form" style="cursor:pointer;" />
</form>
</body>
</html>
I want to validate the captcha on cmdSubmit click.
Please help.
This Client side verification of reCaptcha - the following worked for me :
if reCaptcha is not validated on client side grecaptcha.getResponse(); returns null, else is returns a value other than null.
Javascript Code:
var response = grecaptcha.getResponse();
if(response.length == 0)
//reCaptcha not verified
else
//reCaptch verified
Use this to validate google captcha with simple javascript.
This code at the html body:
<div class="g-recaptcha" id="rcaptcha" style="margin-left: 90px;" data-sitekey="my_key"></div>
<span id="captcha" style="margin-left:100px;color:red" />
This code put at head section on call get_action(this) method form button:
function get_action(form)
{
var v = grecaptcha.getResponse();
if(v.length == 0)
{
document.getElementById('captcha').innerHTML="You can't leave Captcha Code empty";
return false;
}
else
{
document.getElementById('captcha').innerHTML="Captcha completed";
return true;
}
}
If you render the Recaptcha on a callback
<script src="https://www.google.com/recaptcha/api.js?onload=onloadCallback&render=explicit" async defer></script>
using an empty DIV as a placeholder
<div id='html_element'></div>
then you can specify an optional function call on a successful CAPTCHA response
var onloadCallback = function() {
grecaptcha.render('html_element', {
'sitekey' : 'your_site_key',
'callback' : correctCaptcha
});
};
The recaptcha response will then be sent to the 'correctCaptcha' function.
var correctCaptcha = function(response) {
alert(response);
};
All of this was from the Google API notes :
Google Recaptcha v2 API Notes
I'm a bit unsure why you would want to do this. Normally you would send the g-recaptcha-response field along with your Private key to safely validate server-side. Unless you wanted to disable the submit button until the recaptcha was sucessful or such - in which case the above should work.
Hope this helps.
Paul
Simplified Paul's answer:
Source:
<script src="https://www.google.com/recaptcha/api.js"></script>
HTML:
<div class="g-recaptcha" data-sitekey="YOUR_KEY" data-callback="correctCaptcha"></div>
JS:
var correctCaptcha = function(response) {
alert(response);
};
I used HarveyEV's solution but misread it and did it with jQuery validate instead of Bootstrap validator.
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.14.0/jquery.validate.min.js"></script>
<script>
$("#contactForm").validate({
submitHandler: function (form) {
var response = grecaptcha.getResponse();
//recaptcha failed validation
if (response.length == 0) {
$('#recaptcha-error').show();
return false;
}
//recaptcha passed validation
else {
$('#recaptcha-error').hide();
return true;
}
}
});
</script>
I thought all of them were great but I had troubles actually getting them to work with javascript and c#. Here is what I did. Hope it helps someone else.
//put this at the top of the page
<script src="https://www.google.com/recaptcha/api.js"></script>
//put this under the script tag
<script>
var isCaptchaValid = false;
function doCaptchaValidate(source, args) {
args.IsValid = isCaptchaValid;
}
var verifyCallback = function (response) {
isCaptchaValid = true;
};
</script>
//retrieved from google and added callback
<div class="g-recaptcha" data-sitekey="sitekey" data-callback="verifyCallback">
//created a custom validator and added error message and ClientValidationFucntion
<asp:CustomValidator runat="server" ID="CustomValidator1" ValidationGroup="Initial" ErrorMessage="Captcha Required" ClientValidationFunction="doCaptchaValidate"/>
Unfortunately, there's no way to validate the captcha on the client-side only (web browser), because the nature of captcha itself requires at least two actors (sides) to complete the process.
The client-side - asks a human to solve some puzzle, math equitation, text recognition, and the response is being encoded by an algorithm alongside with some metadata like captcha solving timestamp, pseudo-random challenge code.
Once the client-side submits the form with a captcha response code, the server-side needs to validate this captcha response code with a predefined set of rules, ie. if captcha solved within 5 min period, if the client's IP addresses are the same and so on.
This a very general description, how captchas works, every single implementation (like Google's ReCaptcha, some basic math equitation solving self-made captchas), but the only one thing is common - client-side (web browser) captures users' response and server-side (webserver) validates this response in order to know if the form submission was made by a human or a robot.
NB. The client (web browser) has an option to disable the execution of JavaScript code, which means that the proposed solutions are completely useless.
you can render your recaptcha using following code
<div id="recapchaWidget" class="g-recaptcha"></div>
<script type="text/javascript">
var widId = "";
var onloadCallback = function ()
{
widId = grecaptcha.render('recapchaWidget', {
'sitekey':'Your Site Key'
});
};
</script>
<script src="https://www.google.com/recaptcha/api.js?onload=onloadCallback&render=explicit" async defer></script>
Then you can validate your recaptcha by using "IsRecapchaValid()" method as follows.
<script type="text/javascript">
function IsRecapchaValid()
{
var res = grecaptcha.getResponse(widId);
if (res == "" || res == undefined || res.length == 0)
{
return false;
}
return true;
}
</script>
Source Link
You can simply check on client side using
grecaptcha.getResponse() method
var rcres = grecaptcha.getResponse();
if(rcres.length){
grecaptcha.reset();
showHideMsg("Form Submitted!","success");
}else{
showHideMsg("Please verify reCAPTCHA","error");
}
I used Palek's solution inside a Bootstrap validator and it works. I'd have added a comment to his but I don'y have the rep;). Simplified version:
$('#form').validator().on('submit', function (e) {
var response = grecaptcha.getResponse();
//recaptcha failed validation
if(response.length == 0) {
e.preventDefault();
$('#recaptcha-error').show();
}
//recaptcha passed validation
else {
$('#recaptcha-error').hide();
}
if (e.isDefaultPrevented()) {
return false;
} else {
return true;
}
});
Here's how we were able to validate the RECAPTCHA using .NET:
FRONT-END
<div id="rcaptcha" class="g-recaptcha" data-sitekey="[YOUR-KEY-GOES-HERE]" data-callback="onFepCaptchaSubmit"></div>
BACK-END:
public static bool IsCaptchaValid(HttpRequestBase requestBase)
{
var recaptchaResponse = requestBase.Form["g-recaptcha-response"];
if (string.IsNullOrEmpty(recaptchaResponse))
{
return false;
}
string postData = string.Format("secret={0}&response={1}&remoteip={2}", "[YOUR-KEY-GOES-HERE]", recaptchaResponse, requestBase.UserHostAddress);
byte[] data = System.Text.Encoding.ASCII.GetBytes(postData);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://www.google.com/recaptcha/api/siteverify");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;
using (var stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
var response = (HttpWebResponse)request.GetResponse();
var responseString = "";
using (var sr = new System.IO.StreamReader(response.GetResponseStream()))
{
responseString = sr.ReadToEnd();
}
return System.Text.RegularExpressions.Regex.IsMatch(responseString, "\"success\"(\\s*?):(\\s*?)true", System.Text.RegularExpressions.RegexOptions.Compiled);
}
Call the above method within your Controller's POST action.
If you just want to avoid a trip to the server when the user hasn't even attempted the reCAPTCHA, put a validate function in the onsubmit action:
<form id="start_game" action="start-game" method="post" onsubmit="return validate_form();">
And then make that function something like this:
function validate_form() {
const recaptcha_box_checked = (grecaptcha.getResponse()) ? true : false;
if (recaptcha_box_checked) {
return true;
}
else {
alert("You must check the 'I am not a robot' box before you can start a game!");
return false;
}
}
Now, the user could certainly subvert this, but your backend is going to check the g-recaptcha-response with a google server using your secret key. This just stops the user from having to go through another page or two when she simply forgets to check the box.
You cannot validate alone with JS only. But if you want to check in the submit button that reCAPTCHA is validated or not that is user has clicked on reCAPTCHA then you can do that using below code.
let recaptchVerified = false;
firebase.initializeApp(firebaseConfig);
firebase.auth().languageCode = 'en';
window.recaptchaVerifier = new firebase.auth.RecaptchaVerifier('recaptcha-container',{
'callback': function(response) {
recaptchVerified = true;
// reCAPTCHA solved, allow signInWithPhoneNumber.
// ...
},
'expired-callback': function() {
// Response expired. Ask user to solve reCAPTCHA again.
// ...
}
});
Here I have used a variable recaptchVerified where I make it initially false and when Recaptcha is validated then I make it true.
So I can use recaptchVerified variable when the user click on the submit button and check if he had verified the captcha or not.
if (typeof grecaptcha !== 'undefined' && $("#dvCaptcha").length > 0 && $("#dvCaptcha").html() == "") {
dvcontainer = grecaptcha.render('dvCaptcha', {
'sitekey': ReCaptchSiteKey,
'expired-callback' :function (response){
recaptch.reset();
c_responce = null;
},
'callback': function (response) {
$("[id*=txtCaptcha]").val(c_responce);
$("[id*=rfvCaptcha]").hide();
c_responce = response;
}
});
}
function callonanybuttonClick(){
if (c_responce == null) {
$("[id*=txtCaptcha]").val("");
$("[id*=rfvCaptcha]").show();
return false;
}
else {
$("[id*=txtCaptcha]").val(c_responce);
$("[id*=rfvCaptcha]").hide();
return true;
}
}
<div id="dvCaptcha" class="captchdiv"></div>
<asp:TextBox ID="txtCaptcha" runat="server" Style="display: none" />
<label id="rfvCaptcha" style="color:red;display:none;font-weight:normal;">Captcha validation is required.</label>
Captcha validation is required.
<%# Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src='https://www.google.com/recaptcha/api.js'></script>
<script type="text/javascript">
function get_action() {
var v = grecaptcha.getResponse();
console.log("Resp" + v);
if (v == '') {
document.getElementById('captcha').innerHTML = "You can't leave Captcha Code empty";
return false;
}
else {
document.getElementById('captcha').innerHTML = "Captcha completed";
return true;
}
}
</script>
</head>
<body>
<form id="form1" runat="server" onsubmit="return get_action();">
<div>
<div class="g-recaptcha" data-sitekey="6LeKyT8UAAAAAKXlohEII1NafSXGYPnpC_F0-RBS"></div>
</div>
<%-- <input type="submit" value="Button" />--%>
<asp:Button ID="Button1" runat="server"
Text="Button" />
<div id="captcha"></div>
</form>
</body>
</html>
It will work as expected.
I want to use getJSON()'s demo to show its use insetead of $.ajax.
I've till created the following code.
<%# Page Language="VB" AutoEventWireup="false" CodeFile="Test_JSON.aspx.vb" Inherits="Test_HTML" %>
<!DOCTYPE HTML>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Test HTML</title>
<script src="Script/jquery-1.9.1.js" type="text/javascript"></script>
</head>
<body>
<form id="form1" runat="server">
<div>
Enter Name:
<asp:TextBox runat="server" ID="txtName"></asp:TextBox>
<asp:Button runat="server" ID="btnView" Text="View Label of Name" />
</div>
</form>
<script type="text/javascript">
function getJsonData() {
debugger;
$("#btnView").val = $("#txtName").val();
var objJson = {};
objJson["name"] = $("#txtName").val();
return objJson;
}
$("#btnView").click(function(event) {
debugger;
$.getJSON('/Test_JSON.aspx/getJsonData', function(result) {
debugger;
$('<p> APPEND TEXT </p>').appendTo('#btnView');
$('<p> PREPEND TEXT </p>').prependTo('#btnView');
});
});
</script>
</body>
</html>
VB code for PageMethod
Imports Newtonsoft.Json
Partial Class Test_HTML
Inherits System.Web.UI.Page
<Web.Services.WebMethod()> _
Public Shared Function getJsonData(ByVal name As String) As String
Dim jsonString As String = String.Empty
Dim dt_jsonData As New DataTable
Dim dr As DataRow = dt_jsonData.NewRow
Try
dt_jsonData.Columns.Add("name")
dr("name") = name.ToString.Trim()
dt_jsonData.Rows.Add(dr)
If dt_jsonData.Rows.Count <> 0 Then
jsonString = JsonConvert.SerializeObject(dt_jsonData)
End If
Catch ex As Exception
Return ""
Exit Function
End Try
Return jsonString
End Function
End Class
I want to get data from getJsonData(). But my getJSON() is not getting executed with URL. Is there any other way I should use this?
All I need to do is:
1> Enter text in text box
2> Click on button
3> Get textbox's value through getJSON() method and use it somewhere else.
4> And also use appendTo and prependTo methods for demo.