How to Call a Server side Function on the Client side Pin

Posted by Vuyiswamb under ASP.NET on 8/5/2010 | Views : 3292 | Status : [Member] [MVP] [Administrator] | Replies : 2

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Good Day All

i have a Function e.g


public String Getdata(String mystr)

{

//Do what ever

//return  a String

}

and i want to call this function and pass data in Javascript like this

function KeyPress() {
            var TExtbox1 = document.getElementById('Text1');
        
         if (TExtbox1.value.length == 2) {

        //call the function here and pass the textbox1 value.  

   return false;
         }
        }

Thanks

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Responses

Posted by: Narayanjha on: 8/5/2010 [Member] Starter

0	Hello, Please refer below link. http://www.codeproject.com/KB/ajax/demoajaxapp.aspx You can achieve this functionality by using Ajax.dll Regards, Narayan Vuyiswamb, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Muhilan on: 8/5/2010 [Member] Starter

0	you can use Microsoft.XMLDOM object to call server side function from javascript 1. create sepereate aspx page with your functionilty but it should return XML Data ex.. lets take example.aspx Public sReturnXml As New StringBuilder on_PageLoad event //public String Getdata(String mystr) mystr= Request.querystring["val"].ToString() //Do what ever //return a String sReturnXml.Append("<result1>") sReturnXml.Append("<Result>string</Result">) sReturnXml.Append("</result1>") Response.ContentType = "text/xml" Response.Write(sReturnXml.ToString) Response.End() } 2. How to call example.aspx [code] var _xmlSend = new ActiveXObject("Microsoft.XMLDOM"); var _xmlRecv = new ActiveXObject("Microsoft.XMLDOM"); var _xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); if (TExtbox1.value.length == 2) { _xmlSend.loadXML("<node />"); _sSubmitUrl = "../example.aspx?val=" + Textbox1.value; _xmlHttp.Open("POST", _sSubmitUrl, false); _xmlHttp.onreadystatechange = checkReadyState; _xmlHttp.Send(_xmlSend); } function checkReadyState() { var iState = _xmlHttp.readyState; if (iState == 4)//readystate = completed. { if (_xmlHttp.responseXML.xml != ""){ _xmlRecv.loadXML(_xmlHttp.responseXML.xml); varaiblereturnstring = _xmlRecv.selectSingleNode("/result/Result").text; return true; } else { return false; } } [/code] Vuyiswamb, if this helps please login to Mark As Answer. \| Alert Moderator

you can use Microsoft.XMLDOM object to call server side function from javascript

1. create sepereate aspx page with your functionilty but it should return XML Data
ex..
lets take example.aspx


 Public sReturnXml As New StringBuilder

on_PageLoad event

//public String Getdata(String mystr)



mystr= Request.querystring["val"].ToString()



//Do what ever



//return  a String



        sReturnXml.Append("<result1>")

        sReturnXml.Append("<Result>string</Result">)

        sReturnXml.Append("</result1>")

        Response.ContentType = "text/xml"

        Response.Write(sReturnXml.ToString)

        Response.End()

}

2. How to call example.aspx

[code]
var _xmlSend = new ActiveXObject("Microsoft.XMLDOM");
var _xmlRecv = new ActiveXObject("Microsoft.XMLDOM");
var _xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");

if (TExtbox1.value.length == 2) {

_xmlSend.loadXML("<node />");
_sSubmitUrl = "../example.aspx?val=" + Textbox1.value;
_xmlHttp.Open("POST", _sSubmitUrl, false);
_xmlHttp.onreadystatechange = checkReadyState;
_xmlHttp.Send(_xmlSend);

}

function checkReadyState()
{
var iState = _xmlHttp.readyState;

if (iState == 4)//readystate = completed.
{
if (_xmlHttp.responseXML.xml != ""){
_xmlRecv.loadXML(_xmlHttp.responseXML.xml);
varaiblereturnstring = _xmlRecv.selectSingleNode("/result/Result").text;
return true;
}
else {

return false;
}
}
[/code]

Vuyiswamb, if this helps please login to Mark As Answer. | Alert Moderator

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