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Update text of a control in another user-control when the text of a label in another user-control changes

I am using a usercontrol to display label text on the left side of a page and another usercontrol to display the content page, when the text of a field on the content page changes, I need to update the same status on a label on the menu usercontrol on the left.
I have used:
ScriptManager.RegisterClientScriptBlock(this, this.GetType(),"ChangeLabelText", script, false)
to change the text on the left control, the javascript associated with this gets executed but the label still shows the old text even when the text on the content page is updated after page refresh. However, it shows the new updated text when the whole page refreshes.
Please suggest an approach for resolving this issue.

If you have two UserControls on a page, and want to update a Label in the second Control from code behind of the first, you'll need to use FindControl.
//find the other control in the parent
Control control = Parent.FindControl("WebUserControl2") as Control;
//find the label in that control
Label label = control.FindControl("Label1") as Label;
//update the label
label.Text = "Updated from another control";
Update
If you want to update with javascript you just have to make sure you send the right ID.
ScriptManager.RegisterStartupScript(Page, GetType(), "changeLabel", "changeLabel('WebUserControl2_Label1', 'Updated with JS')", true);
And the javscript function
<script type="text/javascript">
function changeLabel(id, text) {
document.getElementById(id).innerHTML = text;
}
</script>

Gridview Custom controls and javascript functions c#

I have a custom control which is basically a Gridview and its first column is a TemplateField with a checkbox in the header and a checkbox for each of the rows. Clicking on the header checkbox should call some javascript to toggle each of the checkboxes in every row on display... it's a common requirement as we know.
My problem is (I'll go into more detail later) that when I have 2 of these controls on the same page, and I click the checkbox that selects all the chkboxes, the page calls the wrong bit of javascript (which only appears once on the rendered html page) and checks all the checkboxes on the wrong grid !
Here's my code:
<asp:TemplateField>
<HeaderTemplate>
<input type="checkbox" ID="chkSelectAll" onclick="SelectAllCheckboxes(this)"/>
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox runat="server" ID="chkSelected"></asp:CheckBox>
</ItemTemplate>
</asp:TemplateField>
Javascript:
<script>
function SelectAllCheckboxes(chk) {
$('#<%=gridPublishers.ClientID%>').find("input:checkbox").each(function ()
{
if (this != chk) { this.checked = chk.checked; }
});
}
</script>
So, the parent page has 2 of these controls on it. The first grid shows All the publishers and the other shows the publishers that have been selected from the first...
<h2>Selected Publishers</h2>
<cac:GridPublishers id="GridSelectedPublishers" runat="server" CssClass="GridSelectedPublishers" BindSource="DynamicFromSession" ShowMultiSelectCol="true" ShowFilterControls="false" NoRecordsMessage="No Publishers have been selected yet." />
<br /><br />
<h2>All Publishers</h2>
<cac:GridPublishers id="GridPublishers" runat="server" ShowMultiSelectCol="true" CssClass="GridPublishers" />
As I said earlier, the javascript only appears once on the rendered html page (and I understand why) but how can I get each instance of the custom control calling it's own javascript (or an alternative method) so that it only toggles its own checkboxes ??
...
I've also tried adding 2 javascript events and on grid bind trying to find the master checkbox and assign it the correct JS function, but I've searched each cell of the header row, and col 0 (where the control should be) holds 0 controls.
...
I've also tried adding a hidden button that on page load, I can assign it the correct javascript function (that will affect the correct gridview) and then the master checkbox fires the hidden button onClientClick event, but as the page reloads, it gets confused and fires the click event twice and from both grids apparently !
Please help !!

So I guess you realise that this line of code is causing the root problem of selecting the checkboxes in the wrong datagrid:
#<%=gridPublishers.ClientID%>').find
It's always going to pickup gridPublishers, and not GridSelectedPublishers.
So this is the area to fix. What you need to do is make this function a bit more abstract:
<input type="checkbox" ID="chkSelectAll" onclick="SelectAllCheckboxes(this)"/>
The onclick event passes 'this', but that's only a reference to the checkbox which isn't much help.
I'd suggest you try and make it something like this:
<input type="checkbox" ID="chkSelectAll" onclick="SelectAllCheckboxes(this,'GridSelectedPublishers')"/>
And then use the 2nd argument in the javascript function to grab the right datagrid.
Your problem now, is how to get that 2nd argument in there....you may be able to think of your own solution for this, but I would be tempted to make that checkbox an ASP checkbox, and find it during datagrid render and assign it the onClick with Attribute.Add
Making sense?

I've already marked "ben_the_builder's" answer as correct because it got me along the right line.
When I bind my grids I call this function:
private void Register_CheckAllControl_JScript()
{
// THIS IS A WORKAROUND FOR WHEN TWO OF THE SAME CUSTOM CONTROL LIVE ON THE SAME PAGE, EACH CONTROL'S JAVASCRIPT MUST SPECIFY THE ID OF THE CONTROL TO AFFECT
if (gridPublishers.HeaderRow != null)
{
CheckBox chkAll = gridPublishers.HeaderRow.FindControl("chkSelectAll") as CheckBox;
if (chkAll != null)
{
if (this.BindSource == Enumerators.BindSource.DynamicFromSession)
{
chkAll.Attributes.Add("onclick", "SelectAllCheckboxes(this,'GridSelectedPublishers');");
}
else
{
chkAll.Attributes.Add("onclick", "SelectAllCheckboxes(this,'GridPublishers');");
}
}
}
}
To access the "master" checkbox from code behind - it had to be an ASP control. an input control just wasn't recognised when iterating through the header cell collection.
My Javascript needed a little tweaking for the IDs to be correct. The control name I'm passing had to be name it was given on the parent page which belongs in the middle of the three tier final html output name (see the example, it'll make sense...)
My Javascript looks like this now:
<script>
function SelectAllCheckboxes(chk, ctrlName) {
//if ctrlName = "
$("#MainContent_" + ctrlName + "_gridPublishers").find("input:checkbox").each(function () {
if (this != chk) { this.checked = chk.checked; }
});
}
</script>

You want to use parameters. Instead of hard coding #<%=gridPublishers.ClientID%> into your javascript function, use the this parameter you pass to the function to determine the name of the grid view that contains the checkbox, then check everything inside that grid view.

Jquery popup on mouse over of calendar control

I am using the Calendar control of ASP.NET. I need to display a pop-up form when I hover over a particular date in the Calendar control. This pop-up should display data from database.
Does anyone have a solution for this?

You should have an empty div:
<div id="popup"></div>
then bind an event to the calendar elements:
('li.calendar').hover(function(){
//make an ajax call and populate the popup div with the data
//easiest method is jquery.load(), but if you need more control use jquery.ajax();
$("popup").load('path/to/page.asp',data,function(){
$("popup").show();
});
});
Look at jquery.load() and jquery.ajax()

I dont know how asp name the date spans, check it, its very easy to detect
after getting the selector
user jQuery to add the event
jQuery('selector').hover(function(){ //or use mousemove
getPopup(jQuery(this).text()); // just send any data to detect the date
}) ;
after that you'll need to make an AJAX request in the getPopup function
you may use
jQuery.get()//or jQuery.post()
__doPostBack()//if you have update panels
//or any ajax technique xmlhttprequest,PM,...
in the response of the ajax request just draw the popup ...
hope this helps
examle getPopup function
function getPopup(date/*for example*/){
jQuery.getScript('www.myWebsite.com/pageThatDrawsThePopup?date='+date);
// getScript assuming that the return value is JS code the immediately draws the popup
// ?date = date assuming that your page takes the date as query string and get the data from the database upon this field
//dont forget to change the url
//very simple very easy ...
}

Add a CSS class to the cell containing the date that should trigger the popup. You'll need to override the DayRender event to do this.
void myCalendar_DayRender(object sender, DayRenderEventArgs e)
{
if (e.Day.Date.Day.ToString().EndsWith("7")){// Replace with your own condition
e.Cell.CssClass+= "specialCell"; //replace with your own custom css class name
}
}
Then add some JavaScript (or Jquery) to trigger the pop-up. The JQuery ajax functions provide the easiest way to get your data and populate the pop-up as per #user1225246's answer.
$(document).ready(function(){
$('.specialCell').hover(function(){
function(){//This will get called when you mouseover
alert('put your JQuery AJAX code here.');
},
function(){
alert('do any clean-up (e.g. hiding the popup if you need to) here.');
}
});

How to get the values from a text box

My web page looks like this
name(textbox1)
email(textbox2)
age(textbox3)
phoneno(textbox4)
submit(button) showfile(hyperlink)
How can I get the values of textboxes saved in "showfile" web page after onclick in the submit button? Can anyone help me?

Update - based on the OP's comments, i have updated my answer
To pass a value between to pages, try this
In the first page button click event handler, write something like this
Session["Name"] = textBox1.text;
then go to the page where you want to display
In the design page add a asp.net Label control like this
<asp:Label ID="lblName" runat="server" Text=""></asp:Label>
and in the page load event handler or whatever event you want to display the text previously stored in the session write the following code
lblName.Text = Convert.ToString(Session["Name"]);
I don't think you can use textbox1 as id for more than one TextBox in your asp.net page, any way you can simply use textbox1.Text property to get the text you wanted

You can't make multiple controls with same id.So Change them to textbox1,textbox2,...After you can take value from the textboxes on button click event like textbox1.text,textbox2.text..etc

it depend on your controllers type.
let me correct you . you want to get the value of the textboxes when user click on the button.but if you want to get the value of these textboxes in client side use the jquery in a script tag :
<script>
$("input[type=submit]").click(function(){
//it return the value of first textbox
$("input[type=text]")[0].val()
});
</script>
but if these textboxes are server side controllers use can set an id for each and use this code :
this.textbox1.Text
try to ask better question if you did not get you answer.

You can access it in button Click event like
string name=Textbox1.text;
string email=Textbox2.text;
decimal Age=Convert.ToDecimal(Textbox3.text);
string phoneNo=Textbox4.text;

Removing default text from text box

I got this Text box with default value as "First Name" ..Now when I click inside this text box to enter name , this value "First Name" keeps on displaying. What I want is to the text box to clear as soon as I click inside it. What property do I need to set in mt textbox tag ?
[Edit]
ok anything from Telerik that I can use to do that ?

There is not out of the box functionality in TextBox that will accomplish this, but the ASP.Net Ajax Toolkit has a Watermark Extender that will do everything you want.
I have used both, but now personally use a jQuery Watermark Plugin
Either will work just fine, choose based on your needs.
According to the Telerik docs you just have to set the EmptyMessage property on their TextBox control. Demo Page Here

In the code behind, on Page Load you can add the following code to achieve this
TextBox1.Attributes.Add("onClick", "javascript:if(this.value=='First Name'){this.value='';}");

You can use the method suggested by #Josh. If you do not want to use Ajax Toolkit controls or JQuery you could write it on your own using Javascript. Write a function which gets called when the foucs is received by the textbox control. I thik the function is called onfocus or just focus in Javascript.

Hi I just wrote this small function which will achieve your desired result
function clearInputBox(x,prefil){
if(x.value == prefil){
x.value = '';
}
}
Your input box looks like this
<input type='text' value='First Name' onfocus="clearInputBox(this,'First Name')" />

May be this will help you

Taking Shobans advice one step farther, you could add something like this to your Page subclass
protected override void OnInitComplete(EventArgs e)
{
string jsString = "javascript:if(this.value=='" + TextBox1.Text + "'){this.value='';}";
TextBox1.Attributes.Add("onFocus", jsString);
base.OnInitComplete(e);
}
What this will do is, it will always consider that default string is the one this controll contains at esign time (the initial one in your .aspx file), so you wont have to manually change it in codebehind every time you change your .aspx. Remember, that OnIinitComplete fires before any viewstate or postback data has been applied, but after the controlls on your page have been set to their default values.
P.S. As anishMarokey pointed, use onFocus vs onClick, since fields can gain focus without clicks via Tab key.