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Show alert message when clicking on text box set in MasterPage in c#

I want to check whether the TextBox is disabled or not.
If we try to click on the disabled TextBox. It should show an alert message.
This is my code with source http://jsfiddle.net/Alfie/2kwKc/ but in my case not working.
On MasterPage.master :
<asp: ContentPlaceHolder ID="head" runat="server">
</asp: ContentPlaceHolder >
<script type="text/javascript">
$("#txDateRet").click(function () {
if (this.readOnly) {
alert("The textbox is clicked.");
}
});
</script>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
On Markup Default.aspx webpage:
<asp:TextBox ID="txDateRet" runat="server"
ReadOnly="true" BackColor="Yellow"
Width="300" CssClass="toUpper"
Enabled="false"></asp:TextBox>
#Update #1
<asp:ContentPlaceHolder ID="head" runat="server">
</asp:ContentPlaceHolder>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#txDateRet").click(function () {
if ($(this).attr("readonly") == "readonly") {
alert($(this).attr("readonly"));
}
});
});
</script>
<asp:TextBox ID="txDateRet"
ClientIDMode="Static"
runat="server"
ReadOnly="true"
BackColor="Yellow"
Width="300"
CssClass="toUpper"
Enabled="false">
</asp:TextBox>
#Update #2
$(document).ready(function () {
$("#txDateRet").click(function () {
alert($(this).attr("readonly"));
});
});
#Update #3
<div class="pure-g">
<div class="pure-u-1 pure-u-md-1-3">
<input name="ctl00$ContentPlaceHolder1$txDateRet"
type="text" value="26/02/2019"
readonly="readonly"
id="txDateRet"
class="toUpper"
style="background-color:Yellow;width:300px;" />
</div>
</div>

There are may three reasons:
1- Because that code rendered before loading JQuery library so put that script before triggering click event.
2- Because that element is and ASP.Net element in a place holder, it may will get different ID that you can see it by inspecting it.
totally change the code like:
<asp: ContentPlaceHolder ID="head" runat="server">
</asp: ContentPlaceHolder >
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#txDateRet").click(function () {
if (this.readOnly) {
alert("The textbox is clicked.");
}
});
});
</script>
<asp:TextBox ID="txDateRet" ClientIDMode = "static" runat="server"
ReadOnly="true" BackColor="Yellow"
Width="300" CssClass="toUpper"
Enabled="false"></asp:TextBox>
3- Or that readonly prop will not get true after rendering it may will get readonly="readonly" so if (this.readOnly) will not work, it may should changed to if (this.readOnly == "readonly").
hope this answer give you the clue.

I think in webform we give the complete id of textbox with content place holder.
You can try this.
$("#head_txDateRet").click(function () {
if (this.readOnly) {
alert("The textbox is clicked.");
}
});

Textbox not getting readonly

I have a textbox, on click, it allows you to select date from calendar control. If the date is deleted, it should uncheck the checkbox available just next to the textbox.
With below code, I am able to achieve everything other than making the textbox readonly so that user is not able to type anything. Also, once the text is selected, checkbox gets checked but when text is deleted the checkbox doesn't get unchecked.
Can anyone suggest what needs I might be doing wrong here ?
<asp:CalendarExtender ID="CalForDate" runat="server" TargetControlID="txtDate" Format="MM/dd/yyyy" PopupPosition="BottomLeft" DefaultView="Days"></asp:CalendarExtender>
<asp:TextBox runat="server" ID="txtDate" AutoPostBack="true" EnableViewState = "false" onKeyPress="javascript:return ChkCheckBox()" OnTextChanged="txtDate_OnTextChanged"></asp:TextBox>
The javascript code:
function ChkCheckBox() {
var txtDate = document.getElementById('ctl00_ctl00_cphMSTMainPage_cphMSTLDAHomePage_txtDate').value;
if (txtDate.length == 9) {
document.getElementById('ctl00_ctl00_cphMSTMainPage_cphMSTLDAHomePage_chkDate').checked = true;
}
else
{
document.getElementById('ctl00_ctl00_cphMSTMainPage_cphMSTLDAHomePage_chkDate').checked = false;
}
In pageload I have added:
if (!IsPostBack){
txtDate.Attributes.Add("readonly", "readonly");}
And on text changed:
public void txtDate_OnTextChanged(object o, EventArgs e){
if (!(string.IsNullOrEmpty(txtDate.Text)))
{
chkDate.Visible = true;
chkDate.Checked = true;
}
else
{
chkDate.Visible = true;
chkDate.Checked = false;
} }

You can easily achieve this using jquery. I am sending you the sample code. Please don't hesitate to ask further assistance if needed.
<script type="text/javascript">
$(document).ready(function () {
$('#txtDate').on('change', function () {
//console.log('Tested');
if ($(this).val().toString().trim() != '') {
$('[Id*=ckTest]').attr('checked', 'checked');
}
else {
$('[Id*=ckTest]').removeAttr('checked');
}
});
$('#btnClear').click(function () {
$('#txtDate').val('');
$('#txtDate').trigger('change');
});
});
</script>
The code file is as below.
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:TextBox ID="txtDate" runat="server" ReadOnly="true" ClientIDMode="Static"></asp:TextBox>
<asp:CheckBox ID="ckTest" runat="server" />
<ajaxToolkit:CalendarExtender ID="CalendarExtender1" runat="server" TargetControlID="txtDate" />
<button id="btnClear">Clear</button>
</div>
</form>
Just add jquery to project i used
jquery-2.1.4.min.js

How can I pass a value from a Button_Click event to Page_Load

It seems I am struggling with the order of the page life cycle. Based on the user selecting button 1 or 2, I need to have respective controls added dynamically during the Page_Load event. My problem is when a button is clicked the Page_Load event is executed before Button_Click event code is read. There for my variable "doWhat" is not assigned a value until after the Page_Load event. How can I have the "doWhat" variable assigned a value to be read during the Page_Load?
Below is asp.net form code for the two buttons:
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button 1" onclick="Button_Click" />
<asp:Button ID="Button2" runat="server" Text="Button 2" onclick="Button_Click" />
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
</div>
</form>
Below is the code behind:
int doWhat;
protected void Page_Load(object sender, EventArgs e)
{
doWhat = Convert.ToUInt16(ViewState["doWhat"]);
if (doWhat == 1)
{
// code to dynamically load group 1 controls
}
else
{
// code to dynamically load group 2 controls
}
Label1.Text = Convert.ToString(doWhat);
}
protected void Button_Click(object sender, EventArgs e)
{
Button btn = sender as Button;
if (btn.ID == "Button1")
{
doWhat = 1;
}
else
{
doWhat = 2;
}
ViewState.Add("doWhat", doWhat);
}

If you are comfortable with javascript then you can achieve it by making following changes in your design and code. Add a hidden field in your aspx page. Your HTML code should be like this.
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button 1" OnClick="Button_Click" OnClientClick="return doWhatAction(1);" />
<asp:Button ID="Button2" runat="server" Text="Button 2" OnClick="Button_Click" OnClientClick="return doWhatAction(2);" />
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
<asp:HiddenField ID="HiddenField1" Value="1" runat="server" />
<script type="text/javascript">
var doWhatAction = function (actionIndex) {
//alert(actionIndex);
document.getElementById("<%=HiddenField1.ClientID%>").value = actionIndex;
return true;
}
</script>
</div>
</form>
And your code will be something like...
int doWhat;
protected void Page_Load(object sender, EventArgs e)
{
//doWhat = Convert.ToUInt16(ViewState["doWhat"]);
doWhat = Convert.ToUInt16(HiddenField1.Value);
if (doWhat == 1)
{
// code to dynamically load group 1 controls
}
else
{
// code to dynamically load group 2 controls
}
Label1.Text = Convert.ToString(doWhat);
}
protected void Button_Click(object sender, EventArgs e)
{
//Do Nothing
//Button btn = sender as Button;
//if (btn.ID == "Button1")
//{
// doWhat = 1;
//}
//else
//{
// doWhat = 2;
//}
//ViewState.Add("doWhat", doWhat);
}

You can use jquery or javascript i this case.
Took on hidden variable in form
initialize it on click event of button in javascript
Read value of hidden variable in page load
<head >
<title>Hidden Variable</title>
<script type="text/javascript">
function SetHDNValue()
{
var hdnControlID = '<%= hdnControl.ClientID %>';
document.getElementById(hdnControlID).value=1;
}
</script>
</head>
<body >
<form id="form1" runat="server">
<div>
<input id="hdnControl" type="hidden" runat="server" />
<asp:Button ID="btnJSValue" Text="Click" runat="server" OnClientClick="SetHDNValue()"
/>
</div>
</form>
</body>
And in code behind file hdnControl.value

Since long ago I am not working with asp.net forms. And forgot doing things.But I found how you can do. As on stackoverflow link like answers is wrong. I copied main statements from the link which indicate how post-back events works and how you can use it for your purpose. For more http://aspsnippets.com/Articles/How-to-find-the-control-that-caused-PostBack-in-ASP.Net.aspx
All controls accept Button and ImageButton use JavaScript for causing a postback. To enable postback on these controls one has to set AutoPostBack property to true.
When you set this property to true, __doPostBack function is called on event which causes a postback.
The __doPostBack function is not visible in Source of the page until you place a LinkButton or set AutoPostBack to true for any of the above discussed controls.
Here is how generated __doPostBack looks:
<script type = "text/javascript">
function __doPostBack(eventTarget, eventArgument) {
if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
theForm.__EVENTTARGET.value = eventTarget;
theForm.__EVENTARGUMENT.value = eventArgument;
theForm.submit();
}
}
</script>
The __doPostBack function simply stores the below two arguments in two hidden fields
eventTarget – The name of the control that caused the postback
eventArgument – The argument to be sent to server.
In two hidden fields which also appear only when AutoPostBack is set to true
Finally, here is how you can distinguish by getting control's ID that caused the postback :
if (IsPostBack)
{
string CtrlID = string.Empty;
if (Request.Form["__EVENTTARGET"] != null &&
Request.Form["__EVENTTARGET"] != string.Empty)
{
CtrlID = Request.Form["__EVENTTARGET"];
/****implement Your logic depending on control ID****/
}
}

How to show-or-hide image loader in the row that button clicked on it in jquery?

I have a grid view with update panel and I set an image loader when the post back occur, But when I click on one button in for example row 5, all of loader display inline,but i just need to show the exactly image loader near my button that i click on it,How can I do that in j query or java script?
<script type="text/javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_beginRequest(BeginRequestHandler);
prm.add_endRequest(EndRequestHandler);
function BeginRequestHandler(sender, args) {
//$(".load").show();
$('.btn').live("click", function () {
//$('tr [type="checkbox"]:checked').parent().parent().each(function () {
//if ($(this).find('input[id*="txtSalaryHead"]').length > 0) {
//alert($(this).find('input[id*="txtSalaryHead"]').val() + "---" + $(this).find('input[id*="hdnHeadId"]').val())
//}
$(".load").show();
});
//});
}
function EndRequestHandler(sender, args) {
$(".load").hide();
}
</script>
and this my code:
<asp:Panel runat="server" ID="pnl1">
<asp:UpdatePanel ID="UpdatePanel3" runat="server">
<ContentTemplate>
<asp:Label ID="Label6" runat="server" Font-Bold="True" ForeColor="#D53B22"
Text="تعداد : " Width="42px"></asp:Label>
<asp:DropDownList ID="ddl_no" runat="server" CssClass="ddlno">
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem Value="3"></asp:ListItem>
<asp:ListItem Value="4"></asp:ListItem>
<asp:ListItem Value="5"></asp:ListItem>
<asp:ListItem Value="6"></asp:ListItem>
<asp:ListItem Value="7"></asp:ListItem>
<asp:ListItem Value="8"></asp:ListItem>
<asp:ListItem Value="9"></asp:ListItem>
<asp:ListItem Value="10"></asp:ListItem>
</asp:DropDownList>
<asp:Button ID="btn_addBasket" runat="server" CssClass="btn" Text="اضافه به سبد" OnClick="btn_addBasket_Click" />
<img src="images/ajax-loader.gif" class="load" style="display:none;"/>
</ContentTemplate>
</asp:UpdatePanel>
<script type="text/javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_beginRequest(BeginRequestHandler);
prm.add_endRequest(EndRequestHandler);
function BeginRequestHandler(sender, args) {
//$(".load").show();
$('.btn').live("click", function () {
//$('tr [type="checkbox"]:checked').parent().parent().each(function () {
//if ($(this).find('input[id*="txtSalaryHead"]').length > 0) {
//alert($(this).find('input[id*="txtSalaryHead"]').val() + "---" + $(this).find('input[id*="hdnHeadId"]').val())
//}
$(".load").show();
});
//});
}
function EndRequestHandler(sender, args) {
$(".load").hide();
}
</script>
</asp:Panel>
this code in my grid view template and i want show img with id=loader when my button(id=btn_addbasket) click

I can't be more specific without seeing your markup, but in general it looks like something like this is happening:
<div>
<div>
<span class="load">something</span>
<button class="btn">click here</button>
</div>
<div>
<span class="load">something</span>
<button class="btn">click here</button>
</div>
<div>
<span class="load">something</span>
<button class="btn">click here</button>
</div>
</div>
So in your JavaScript code, when you reference $('.load'), you're referencing every element with that class. But you only want to reference the nearest element to the button that was clicked. Perhaps instead of this:
$(".load").show();
Try something more like this:
$(this).closest('div').find('.load').show();
Again, without seeing your markup, I can't be specific. This is a general concept, not code to be copied/pasted to solve your problem. But what this is essentially doing is:
Referencing the button which was clicked: $(this)
Referencing the parent div (or whatever element you use) to that button: $(this).closest('div')
Referencing children of that parent with the class load: $(this).closest('div').find('.load')
This way only the elements of class load which share that common parent element with the specific button (I'm guessing there should be only one for each button) are referenced when calling show().

Jquery not called?

<div>
<asp:Button ID="btnCalculate" runat="server" Text="Calculate Claim" OnClientClick="cfrm();"/>
</div>
<div style="visibility: hidden;">
<asp:Button ID="btnYes" runat="server" OnClick="btnYes_Clicked" />
</div>
<script language="javascript" type="text/javascript">
function cfrm() {
var fee = $('[id$=lblTotalProcedureFee]').text();
if (fee > 500) {
if (confirm('Are you sure to do this operation?')) {
$('#<%= this.btnYes.ClientID %>').click();
}
}
}
</script>
I am trying to call "btnYes_Clicked" from the query. Refer to above code. It doesn't work.. then i edited the code just to test. First click, it doesn't work. 2nd click, it goes to the btnYes_Clicked event. I'm using master page which has update panels. Please help. Thanks..
<script language="javascript" type="text/javascript">
function cfrm() {
$('#<%= this.btnYes.ClientID %>').click();
}
</script>

Maybe you can try something like this, using return in OnClientClick and in cfrm to prevent form unwanted form submitting :
<div>
<asp:Button ID="btnCalculate" runat="server" Text="Calculate Claim" OnClientClick="return(cfrm());"/>
</div>
<script language="javascript" type="text/javascript">
function cfrm() {
var fee = $('[id$=lblTotalProcedureFee]').text();
if (fee > 500) {
if (confirm('Are you sure to do this operation?')) {
$('#<%= this.btnYes.ClientID %>').click();
}
}
return false;
}
</script>
Hope this will help