Develop Reference

Pass input text value to javascript not working

Good day. I have read and done almost all of the solution in the questions but cant seem to solve my problem. As written in my question, in mvc, i am passing a value from controller to view a string and then get by javascript to run a modal if ever a certain condition is met. please help. thanks.
here is the code in my controller:
public ActionResult Series()
{
List<sample> series = db.samples.Where(x => x.status == "False").ToList();
if ( series.Count == 0)
{
ViewBag.Info = "None";
}
else {
ViewBag.Series = series;
ViewBag.Info = "Have";
}
return View();
}
My View:
<input type="text" value="#ViewBag.Info" id="info" name="info" />
My Javascript:
#section Scripts{
<script>
$(window).on('load', function () {
var modelll = document.getElementById("#(ViewBag.Info)").value;
var s_end = document.getElementById("myNumber2").value;
var s_current = document.getElementById("myNumber3").value;
var s_status1 = document.getElementById("status").value;
var s_id1 = parseInt(document.getElementById("myNumber").value);
var s_end2 = parseInt(s_end, 10);
var s_current2 = parseInt(s_current, 10);
var x = parseInt(s_current, 10) + 1;
document.getElementById("item1").value = s_id1;
document.getElementById("item2").value = s_end;
document.getElementById("item3").value = x;
document.getElementById("status2").value = s_status1;
if (modelll === 'Have')
{
if ((s_current2 > s_end2) && (s_current2 != s_end2)) {
$('#myModal').modal({ backdrop: 'static', keyboard: false });
$('#myModal').modal('show');
}
}
else
{
$('#myModal').modal({ backdrop: 'static', keyboard:false });
$('#myModal').modal('show');
}
});
</script>
}

getElementById need an ID but you are passing #ViewBag.Info. change it to :
var modelll = document.getElementById("info").value;
also you are making many extra variables which are not really needed. for example to get what you have in s_current2, you can use
var s_current = parseInt(document.getElementById("myNumber3").value, 10);
no need to create another variable to convert it to integer.

To get the value from textbox
var modelll = document.getElementById("info");
To set the value to textbox
document.getElementById("info").value = var modelll;
you are using #ViewBag.Info instead of element id.

Following line is causing the problem in your code :
var modelll = document.getElementById("#(ViewBag.Info)").value;
// document.getElementById needs Id but you are passing #(ViewBag.Info) which is wrong
var modelll = document.getElementById("info").value; //info id of your textbox
// now check
if (modelll === 'Have')
{ }
else
{ }

Javascript save , erase and reload input value

I have a problem with my Script. I want to do the following steps in this order:
1. Save the text in the input field.
2. Delete all text in the input field.
3. Reload the same text that was deleted before in the input field.
The problem with my script is that the ug()- function writes undefined in my textbox instead of the string that should be stored in var exput. The alert(exput) however shows me the correct content.
Help would be very much appreciated. And I'm sure there is better ways to do that, I'm quite new to this stuff.
HTML
<textarea id="a" style="width: 320px; height: 200px;"></textarea>
<input type="checkbox" id="remember" onclick="merker();deleter();ug()" />
Javascript
function merker() {
var merkzeug = document.getElementById('a').value;
ug(merkzeug);
};
function deleter() {
if(document.getElementById('remember').checked == true)
{
document.getElementById('a').value = "";
}
else {document.getElementById('a').value = "";
}
};
function ug(exput) {
alert(exput);
document.getElementById('a').value = exput;
};

Your code is calling merker(); deleter(); ug(); in the onclick event, but ug() is already called by merker(). You should be doing this instead:
function merker() {
var merkzeug = document.getElementById('a').value;
deleter();
ug(merkzeug);
};
function deleter() {
if(document.getElementById('remember').checked == true)
{
document.getElementById('a').value = "";
}
else {document.getElementById('a').value = "";
}
};
function ug(exput) {
alert(exput);
document.getElementById('a').value = exput;
};
<textarea id="a" style="width: 320px; height: 200px;"></textarea>
<input type="checkbox" id="remember" onclick="merker();" />

I changed Your Javascript:
function merker() {
merkzeug = document.getElementById('a').value;//global variable without var
ug();//why You use it here? I think only for test. So delete it after.
};
function deleter() {
if(document.getElementById('remember').checked == true)
{
document.getElementById('a').value = "";
}
else {document.getElementById('a').value = "";
}
};
function ug() {
alert(merkzeug);
document.getElementById('a').value =merkzeug;
};
Problems with your code:
method ug was used with argument and without argument ( i changed to without )
to restore deleted value it must be saved to some variable, i saved to global merkzeug variable - this is not good practice but sufficient in this case
next i used merkzeug to restore value in textarea in ug() function
i do not know why You using ug() two times? maybe delete one of them is good thing to do.
In plunker - https://plnkr.co/edit/fc6iJBL80KcNSpaBd0s9?p=info

problem is: you pass undefined variable in the last ug function:
you do: merker(value) -> ug(value); delete(); ug(/*nothing*/);
or you set your merkzeung variable global or it will never be re-inserted in your imput:
var merkzeug = null;
function merker() {
merkzeug = document.getElementById('a').value;
ug(merkzeug);
};
function deleter() {
if(document.getElementById('remember').checked == true)
{
document.getElementById('a').value = "";
}
else {document.getElementById('a').value = "";
}
};
function ug(exput) {
if (typeof exput === 'undefined') exput = merkzeung;
alert(exput);
document.getElementById('a').value = exput;
};

Javascript - How to enable/disable text input in IE9

The following script worked in IE8 but not in IE9:
function toggleSelect(fieldName)
{
var idx = fieldName.lastIndexOf("_");
var sub = fieldName.substring(19,idx);
if (document.findForm["cb_Row_PageAutoDelete_" + sub].checked) {
document.findForm["SHIP_QTY_" + sub].disabled=false ;
} else {
document.findForm["SHIP_QTY_" + sub].disabled=true ;
}
return true;
}
I can display the value of the SHIP_QTY field so I know it's on the page but the disable function does not work.
Thanks for your help.

If findForm is the name of the form, you want window.findForm rather than document.findForm. You can also just use the result of the other field's checked property directly rather than an if/else. So your code changes to:
function toggleSelect(fieldName)
{
var idx = fieldName.lastIndexOf("_");
var sub = fieldName.substring(19,idx);
window.findForm["SHIP_QTY_" + sub].disabled = window.findForm["cb_Row_PageAutoDelete_" + sub].checked;
return true;
}

Explanation of this JavaScript Code

I'm not too good on the whole JavaScript (I can do some basic validations) but this isn't my zone
I've got a piece of code below that I'm trying to understand what it does, I can read any code and understand a few parts, but this just stumped me.
Here:
function tm_search_click() {
if (document.getElementById('tm').value == 'Enter your trademark') {
document.getElementById('tm').style.backgroundColor = '#fcc';
return false;
} else {
window.location = '?tm=' + escape(document.getElementById('tm').value);
return true;
}
}
function qs(a) {
a = a.replace(/[[]/, "\[").replace(/[]]/, "\]");
var b = "[\?&]" + a + "=([^&#]*)";
var c = new RegExp(b);
var d = c.exec(window.location.href);
return d == null ? "" : decodeURIComponent(d[1]).replace(/+/g, " ")
}
if (qs("tm") != "") {
tm_trademark = document.getElementById("tm").value = unescape(qs("tm"));
tm_partner = "migu2008";
tm_frame_width = 630;
tm_frame_height = "auto";
tm_trademark_country_code = "GB";
tm_css_url = "http://remarqueble.com/api/theme/search_corporate.css";
document.getElementById("tmLoading").style.display = "block";
tm_on_search_result = function () {
document.getElementById("tmLoading").style.display = "none";
document.getElementById("tmLoaded").style.display = "block"
}
} else {
tm_search_method = "none"
}
That is all of it without the <script> tags.
Could I also edit this code so that it searches are made based on what option the user inputs?

I think it works like this (assuming that this is in tags inside html page)
Page loads.
The script checks if URL has 'tm' parameter. If it has, then it sets bunch of tm_.. parameters and callback function. I don't know how they are used.
User clicks something that triggers the tm_search_click
Script sets new URL for the page and browser starts loading that
Goto step 1.

jQuery & Handling Element ID's

I have the following code:
function mandatoryField(manF)
{
var fieldId = $(manF).val();
if(fieldId == "")
{
return false;
}
else
{
return true;
}
}
It doesn't work, but this does:
function mandatoryField()
{
var fieldId = $("#element_1").val();
if(fieldId == "")
{
return false;
}
else
{
return true;
}
}
Presume, on my first example, mandatoryField is called as such:
mandatoryField("#element_1")
Why doesn't it work when I try to replace the absolute element ID name with a variable?
Edit:
Most recent code - non-working:
function isAmExSelected()
{
return $("#creditCardType").val() == "American Express";
}
function containsOnlyDigits(str)
{
return str.match(/[^0-9]/) == null;
}
function validateCCNumber()
{
var ccn = $("#creditCardNumber").val();
var onlyDigits = containsOnlyDigits(ccn);
if(isAmExSelected())
{
return ccn.length == 15 && onlyDigits;
}
else
{
return ccn.length == 16 && onlyDigits;
}
}
function mandatoryField(manF)
{
var fieldId = $("#" + manF).val();
return fieldId != "";
}
function registerValidation(id, validateMethod(), errorMethod)
{
$(id).change(function(){
if(validateMethod() == false)
{
errorMethod();
}
});
}
$(document).ready(function(){
registerValidation("#creditCardNumber", validateCCNumber, function(){alert("Invalid Credit Card Number!")});
$('input[type=text][class=mandatory]').blur(function(){
if (mandatoryField(this.id)) {
alert('Field:' + this.id + ' is mandatory!')
}
});
});
Edit 2
I've rewritten the entire thing to look like this:
$('input[type=text][class=mandatory]').blur(function(){
if (!($("#" + this.id).val().length)) {
alert('Field:' + this.id + ' is mandatory!');
}
});
If a text input of the mandatory class blurs, then run the function: if #foo.val() does not have length (i.e. has no text in it), run the alert. I believe it should work, but it does not.

Update your code to so:
function mandatoryField(manF)
{
var fieldId = $("#" + manF).val();
if(fieldId == "")
{
return false;
}
else
{
return true;
}
}
and then try again.

Both pieces of code should work the same irrespective of whether the selector is passed in as an argument, or provided as a literal to $ directly. Also, instead of the if..else, you could do
function mandatoryField(manF) {
var fieldId = $(manF).val();
return fieldId != "";
}

Try this one:
function mandatoryField(manF)
{
if($('#' + manF).val() == "")
{
return false;
}
else
{
return true;
}
}
mandatoryField("element_1");
But this will get you value of element, not it's id. I'm not sure what you are tring to accomplish.
Trigger on field blur option:
$('input[type=text][class=classForMandatoryFields]').blur(function(){
if (mandatoryField(this.id)) {
alert('Field:' + this.id + ' is mandatory!')
}
});

Could you try:
var fieldId = manF.val();
mandatoryField($("element_1"));

Besides your selector problem, you could rewrite your function like this:
function mandatoryField(manF){
return $(manF).val().length;
}
This is, because in JavaScript everything has a truth or false meaning. For numbers, 0 is false.
EDIT:
My test works just fine:
function mandatoryField(manF){
return $(manF).val().length;
}
(...)
<input id="test" value=""/>
<input type="button" value="dd" onClick="alert('length: ' + (mandatoryField('#test'))"/>

Okay this will not work because jquery will assume manF is a DOM object but instead you are passing string.
have you ever tried
var tr = $('#element1') //----------1
alert($(tr).val()) //------------2
tr is actually a dom object
UPDATE::
why don't you try this one
//some code on some event
if(!check_mandatory())
//do something else
else do another thing
//some code on some event
and the function
function check_mandatory()
{
$('.mandatory').each(function{
if($(this).val() == ""){
alert($(this).attr("name") + "required");
//or you can use id or any attrib
return false;
}
})
}
note code might not work not tested, if it did not work then let me know