I am trying to pass the contents of a javascript variable to the server for processing. I can pass static strings no problem but when I pass a variable containing a string, the WebMethod is not called. Here is my code:
(Client)
function expand(checkbox)
{
var selectedrow = checkbox.parentNode.parentNode;
var rowindex = selectedrow.rowIndex;
var parent = document.getElementById("parentTable");
var NextRow = parent.rows[rowindex + 1];
var cols = selectedrow.cells[1];
var ID = cols.firstElementChild.attributes.value;
$.ajax({
type: "post",
url: "Playground.aspx/childBind",
data: "{sendData: ID}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (result) { alert("successful!" + result.d); }
})
NextRow.style.visibility = "visible";
}
(Server)
[WebMethod]
public static string childBind(string sendData)
{
return String.Format("Hello");
}
Now, if I were to try data: "{sendData: "ok"}", the WebMethod gets called and returns a response. How is my syntax wrong?
You don't have to pass it as a string. Since ID is a javascript variable you have to pass its value. When you pass data as "{sendData: ID}" it will not pass the value of ID.
Try this
data: { sendData: ID }
You were sending a string instead of an object ("{sendData: ID}" instead of {sendData: ID}). And the data you were sending wasn't JSON. So remove the contentType line and change the data line. You should re-write this as:
$.ajax({
type: "post",
url: "Playground.aspx/childBind",
data: {sendData: ID},
dataType: "json",
success: function (result) { alert("successful!" + result.d); }
})
You can also write this, if you want to send JSON:
$.ajax({
type: "post",
url: "Playground.aspx/childBind",
data: $.getJSON({sendData: ID}),
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function (result) { alert("successful!" + result.d); }
})
Since you are using jQuery run these tests for the answer:
var ID = 45;
var x = "{sendData: ID}";
alert(jQuery.isPlainObject(x)); // false
var y = { sendData: ID};
alert(jQuery.isPlainObject(y)); // true
Here is the jsFiddle:
http://jsfiddle.net/3ugKE/
You are passing in 'ID' as a string rather than a variable.
All you need to do is remove the quotes around your data object.
Further reading on JSON and javascript objects:
http://www.json.org/
http://www.w3schools.com/js/js_objects.asp
you can use this code :
$.ajax({
type: "post",
url: "Playground.aspx/childBind",
data: JSON.stringify({sendData: ID}),
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (result) { alert("successful!" + result.d); }
})
Related
I am trying to pass a json object to my .net webmethod.
Here is my C#:
[WebMethod]
public static string Guncelle(string personel)
{
return "It came.";
}
And my jquery ajax:
var saveData = {};
saveData.Isim = isim;
saveData.Soyad = soyisim;
saveData.Firma = firma;
.
.
.
var result = JSON.stringify({ personel: saveData });
$.ajax({
type: "POST",
url: "Personeller.aspx/Guncelle",
data: result,
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (msg) {
alert(msg.d);
},
error: function (msg) {
alert(msg.d);
}
})
When I run code, it returns 'undefined' with alert. What is the correct way of passing json object to C# Webmethod ? I tried other examples for passing an object but none of them worked for me.
try this: data: "{personel:'" + saveData+ "'}"
I am using the below code to call a ashx page. But it's not working for me. I have place my code here. I always got the error message message "Request Failed". Please help me..
<script type="text/javascript">
function CallLoginHandler(user, pass) {
alert(user);//Got value
alert(pass);//Got Value
$(function(){
$.ajax({
type: "POST",
url: "../handler/JQGridHandler.ashx?MainPage=GetUserDetails&Type=2&user=" + user + "&pass=" + pass + "",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: OnComplete,
error: OnFail
});
return false;
});
}
function OnComplete(result) {
alert([result.Id, result.Name, result.Age, result.Department]);
}
function OnFail(result) {
alert('Request Failed');
}
</script>
remove these lines:
$(function(){ // <----remove this
return false; // and this
}); // and this too
Update to this function:
function CallLoginHandler(user, pass) {
$.ajax({
type: "POST",
url: "../handler/JQGridHandler.ashx", // updated url
data: { // pass your data like this since type is post
MainPage:"GetUserDetails",
Type:2,
user:user,
pass:pass
},
contentType: "application/json; charset=utf-8",
dataType: "json",
success: OnComplete,
error: OnFail
});
}
and also your url is not correct:
url: "../handler/JQGridHandler...... + pass + "",
// --here you have a blank `""` after pass-----^
and since your type: "post" so you can pass the data like this:
data: {
MainPage:"GetUserDetails",
Type:2,
user:user,
pass:pass
},
Separate your string into a javascript object to be encoded and sent to the server as JSON based on your content type. Also, get rid of $(function(){ in your function call, it's useless here.
$.ajax({
type: "POST",
url: "../handler/JQGridHandler.ashx';
contentType: "application/json; charset=utf-8",
dataType: "json",
data: {
MainPage: 'GetUserDetails',
Type: 2,
user: user,
pass: pass
}
success: OnComplete,
error: OnFail
});
If this doesn't work, then the issue is likely one of the following:
The URL address is wrong
The server is evaluating a GET as opposed to a POST request
The server expects, application/x-www-form-urlencoded but you've declared it's json
You have a routing issue
Note: Do not send your user and pass in query string.
function CallLoginHandler(user, pass) {
$.ajax({
type: "POST",
url: "../handler/JQGridHandler.ashx",
data: {
MainPage: 'GetUserDetails',
Type: 2,
user: user,
pass: pass
},
// DO NOT SET CONTENT TYPE to json
// contentType: "application/json; charset=utf-8",
// DataType needs to stay, otherwise the response object
// will be treated as a single string
dataType: "json",
success: OnComplete,
error: OnFail
});
});
}
Your handler.ashx file
using System;
using System.Web;
using Newtonsoft.Json;
public class Handler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
string user= context.Request.Form["user"];
//.....
var wrapper = new { d = myName };
// in order to use JsonConvert you have to download the
// Newtonsoft.Json dll from here http://json.codeplex.com/
context.Response.Write(JsonConvert.SerializeObject(wrapper));
}
public bool IsReusable
{
get
{
return false;
}
}
}
source
Below are both my C# and
JavaScript code, I can access this method but I'm not getting the expected output
from "success":
success: function( msg ){
alert( msg.d );
}
Instead it returns [object object]
Javascript:
$.ajax({
type: "POST",
url: "Home.aspx/UpdateSelectionStatus,
data: '{id_ver: "' + id + '" }',
contentType: "application/json; charset=utf-8",
dataType: "json",
cache: false,
success: function(msg){alert(msg.d);},
failure: function(){ }
});
C#:
[System.Web.Services.WebMethod]
[System.Web.Script.Services.ScriptMethod]
public static string UpdateSelectionStatus(string id_ver){
return "success" + id_ver;
}
That is the bug:
alert(msg.d);
just use msg directly:
success: function (msg) {alert(msg); },
You returned a simple string, not a complex type, so you haven't got any property like "d".
Please try below code: it is working at my end.
var vid = 10;
$.ajax({
type: "POST",
url: "/Home.aspx/UpdateSelectionStatus",
data: "{id_ver:'" + + vid + "'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
alert(data.d);
}
});
success: function( msg ){
alert( msg.d.toString());
}
i have seen a lot of answers in this site that have helped me a lot but in this one i need to ask guys to help me out.
i have a textarea as a Html editor to pass html content to the server and append it to a newly created Html page( for user POST,etc), but jquery or ASP.NET does not accept the Html content passed by jquery through data: {}
--For Jquery:
$("#btnC").click(function (e) {
e.preventDefault();
//get the content of the div box
var HTML = $("#t").val();
$.ajax({ url: "EditingTextarea.aspx/GetValue",
type: "POST",
contentType: "application/json; charset=utf-8",
dataType: "json",
data: '{num: "' + HTML + '"}', // pass that text to the server as a correct JSON String
success: function (msg) { alert(msg.d); },
error: function (type) { alert("ERROR!!" + type.responseText); }
});
and Server-Side ASP.NET:
[WebMethod]
public static string GetValue(string num)
{
StreamWriter sw = new StreamWriter("C://HTMLTemplate1.html", true);
sw.WriteLine(num);
sw.Close();
return num;//return what was sent from the client to the client again
}//end get value
Jquery part gives me an error:
Invalid object passed in and error in
System.Web.Script.Serialization.JavascriptObjectDeserializer.
It's like jquery doesnt accept string with html content.what is wrong with my code ?
Pass it like this
JSON.stringify({'num':HTML});
You have to stringify the content to JSON properly. HTML may contain synataxes that would make the JSON notation invalid.
var dataToSend = JSON.stringify({'num':HTML});
$.ajax({ url: "EditingTextarea.aspx/GetValue",
type: "POST",
contentType: "application/json; charset=utf-8",
dataType: "json",
data: dataToSend , // pass that text to the server as a correct JSON String
success: function (msg) { alert(msg.d); },
error: function (type) { alert("ERROR!!" + type.responseText); }
});
You can use this
var HTML = escape($("#t").val());
and on server end you can decode it to get the html string as
HttpUtility.UrlDecode(num, System.Text.Encoding.Default);
Make sure JSON.stringify,dataType: "json" and, contentType: "application/json; charset=utf-8", is there in the ajax call.
[HttpPost]
public ActionResult ActionMethod(string para1, string para2, string para3, string htmlstring)
{
retrun view();
}
$.ajax({
url: '/Controller/ActionMethod',
type: "POST",
data: JSON.stringify({
para1: titletext,
para2: datetext,
para3: interchangeNbr.toString(),
htmlstring : messageText.toString()
}),
dataType: "json",
contentType: "application/json; charset=utf-8",
cache: false,
success: function successFunc(data) {
},
error: function errorFunc(jqXHR) {
$('#errroMessageDiv').css({ 'color': 'red' }).text(jqXHR.message).show();
}
});
In Info.aspx.cs i get a compressed file from the WebService. After decoding the content i have an xml File. Using XmlToJSON and JavaScriptSerializer the result is a JSON object. How can i use this object in Info.aspx?
Suppose your json is n below format
var A={
propertyOne: "propertyOne",
propertyTwo: "propertyTwo"
}
Use as below:
A.propertyOne
A.propertyTwo
Try this,
var returnValue = new Object();
returnValue.entityfirst = $("#entityfirst ").val();
returnValue.entitysecond = $("#entitysecond ").val();
returnValue.entitythird = $("#entitythird").val();
var request = $.ajax({
url: ..., //access method url
type: 'POST',
cache: false,
data: JSON.stringify(returnValue),
dataType: 'json',
contentType: 'application/json; charset=utf-8'
});
In you aspx page you have to use javascript if you do a dynamic load.
for example you call and recieve like this (jQuery) :
$.ajax({
url: "myUrlPageForCallJsonService",
type: 'POST',
data: "yourParamsForGettingJson"
dataType: 'json',
complete: function (results) { console.log('complete'); },
success: function (data) { //You logic in the success function
for (var i = 0; i < data.length; i++) {
console.log("success");
_html += '<li>'+ data[i].Param1 + '</li>';
}
_html += '</ul>';
$('#renderbody').html(_html);
},
fail: function (data) { console.log("fail"); }
});
Hope that's help