how to find controlid of one aspx page in some other aspx page. and assign value to the parent page

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Hi,can i find id of any control of aspx page in some different
aspx page.
let say i have one textbox in parent page (default1.aspx) and i want to find this id in diffenrent page let say default2.aspx and assign value to the textbox in the page
default1.
i am going to dafault2.aspx by ajax code as

C#

var txtnameid = document.getElementById(id);

          CreateXmlHttp();

          var requestUrl = "Default2.aspx?id="+txtnameid+"";

          if (XmlHttp) {
              XmlHttp.onreadystatechange = function() { setvalue(txtnameid) };
              XmlHttp.open("GET", requestUrl, true);
              XmlHttp.send(null);
          }


function setvalue(id)
    { 
 	    // To make sure receiving response data from server is completed
	    if(XmlHttp.readyState == 4)
	    {	
		    // To make sure valid response is received from the server, 200 means response received is OK
		    if(XmlHttp.status == 200)
		    {		    
		         var strData = XmlHttp.responseText;
                id.value=strData

		    }
		    else {
	
		    }
    		
	    }

    }

The above code is working for me, but i want to find id in default2.aspx and assign value to textbox which is present in default1.aspx from default2.aspx .
How can i do this.please help

Posted 18-Sep-12 7:54am

aassaahh

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MrLonely_2 · Answer 1 · 2012-09-18T14:30:00

Solution 1

yes you can do this but you must use master page through which you can find and reach to any control you want,
create master page for the two pages and this code to find control:

C#

ContentPlaceHolder pp = this.Master.FindControl("MainContent") as ContentPlaceHolder;
TextBox tb = pp.FindControl("TextBoxID") as TextBox;

Posted 18-Sep-12 14:30pm

MrLonely_2

Updated 18-Sep-12 14:31pm

v2

Comments

aassaahh 19-Sep-12 10:14am

yes ,you are right i can use this techniq but this will reduce my performance as i think since there will be two page event for master and normal aspx page ,am i right?? .

MrLonely_2 22-Sep-12 19:06pm

No, this do not affect on performance, do it

aassaahh 23-Sep-12 14:02pm

i have created master page for it but it is not working for me.showing null reference error

MrLonely_2 24-Sep-12 1:07am

Is the second page (default2) which you want to get control is previous page for default1 ??
if yes you can use PreviousPage Property like that:

TextBox txt = (TextBox)Page.PreviousPage.FindControl("serverNameText");

aassaahh 24-Sep-12 6:34am

i am going to that page using this code CreateXmlHttp();

var requestUrl = "Default2.aspx?id="+txtnameid+"";

if (XmlHttp) {
XmlHttp.onreadystatechange = function() { setvalue(txtnameid) };
XmlHttp.open("GET", requestUrl, true);
XmlHttp.send(null);
}
I am still not getting ID.

MrLonely_2 24-Sep-12 20:14pm

which language you use? javascript??
you must write this code by c# or vb.net

aassaahh 25-Sep-12 2:25am

ok can i get some sample code for this,but i dont want the whole page to be refresh.

MrLonely_2 25-Sep-12 2:31am

Please, tell me what do you want to do exactly, to give you the best scenario and whole code as your case exactly.

aassaahh 25-Sep-12 4:46am

actually i have 50 dropdown on my page each populated with respect to other selected index change.i may have use update panel to prevent the page to be fully refreshed.but since you know update panel are not fast.that why i thought to write ajax code for it.but now i have to use code as
if (XmlHttpM.readyState == 4) {
// To make sure valid response is received from the server, 200 means response received is OK
<pre> if (XmlHttpM.status == 200) {
var strData = XmlHttpM.responseText;
//alert(strData)
if (strData != "") {

var arrscheme = strData.split("~");
id.length = 0;

for (i = 0; i < arrscheme.length - 1; i++) {

var strscheme = arrscheme[i];
//var arrschnm = strscheme.split("~");

// id.options[i] = new Option();
id.options[i] = new Option(strscheme, strscheme);
// id.options[i].value =parseInt(strscheme[0]) //arrschnm[0];
// id.options[i].text = (strscheme[0]) //arrschnm[1];

clearInterval(callfunc)
}

}
else {

id.length = 0;
id.options[0] = new Option();
id.options[0].value = "";
id.options[0].text = "";
}
// document.body.style.cursor = "auto";
} </pre>
for every dropdown ,i want to avoid this code ,and want to make a class and write a method there to bind dropdown or any control.

aassaahh 25-Sep-12 4:49am

My mission is to bind dropdown and assign value to control depending on selectedindex change.and also want to keep in mind page should not be fully refreshed.and should be fast.

MrLonely_2 25-Sep-12 11:42am

Why you put textbox control on another page?
we use ajax to change value of controls on the same page as when you use ajax you do not redirect to the any page!!
if your textbox is on the same page you can do it.

aassaahh 6-Oct-12 13:49pm

My textbox is in the page defualt1.aspx ,i want to assign value to this textbox from default2.aspx.
I am redirecting to defualt2.aspx by ajax code.ie
var requestUrl = "Default2.aspx?id="+txtnameid+"";

if (XmlHttp) {
XmlHttp.onreadystatechange = function() { setvalue(txtnameid) };
XmlHttp.open("GET", requestUrl, true);
XmlHttp.send(null);
}