Archive for October 22, 2007

Calling Asp.NET web service from form onLoad in CRM

Posted: October 22, 2007 in Microsoft Dynamics CRM
Tags:
9

This is the code we can make use for calling ASP.NET webservice in form onLoad javascript event handler of our Entity in Microsoft CRM.

This example calls the simple Hello World service and assigns the value returned (i.e. “Hello World”) to a field in the entity form

xmlHttp=new ActiveXObject(“Microsoft.XMLHTTP”);

xmlHttp.open(‘post’, ‘http://localhost/WebService1/Service1.asmx/HelloWorld’, false);

xmlHttp.send();

var xmlDoc=xmlHttp.responseXML;

var responseElement=xmlDoc.getElementsByTagName(“string”)[0];

var exch=responseElement.firstChild.nodeValue;

crmForm.all.address1_name.DataValue=exch ;

return false;

Check this link for more information

http://nishantrana.wordpress.com/2007/10/18/calling-aspnet-webservice-from-javascript-ajax/

Bye

Calling Asp.NET web service from javascript (Ajax)-(Passing Parameter-POST)

Posted: October 22, 2007 in Ajax, ASP.NET
Tags:
22

Hi,

Now we will modify the application that we developed in the previous post to work with POST parameter

http://nishantrana.wordpress.com/2007/10/22/calling-aspnet-web-service-from-javascript-ajax-passing-parameter/

We have changed the get to post as we are now not passing the value for Name by appending it in the url.

Only make changes to the function getMessage()

function getMessage()

{

var name=’Nishant’;

xmlHttp=new ActiveXObject(“Microsoft.XMLHTTP”);

xmlHttp.open(“POST“, “http://localhost/WebService1/Service1.asmx/HelloWorld”, true);

xmlHttp.onreadystatechange=doUpdate;

xmlHttp.setRequestHeader(“Content-Type”,”application/x-www-form-urlencoded”);

xmlHttp.send(“name=”+escape(name));

return false;

}

Let’s understand the changes that we have made

First of all we have change the method of passing data to POST from GET.

But still we need to pass the name’s value which our web service method needs.

For that we’ll modify our Send() method

xmlHttp.send(“name=”+escape(name));

We are using the same name/value pair in send()  which we used at the end of the request URL in the GET version

escape()-It makes sure that the values are valid values i.e. no tricky characters are there.

But this is not enough that is why we added this line

xmlHttp.setRequestHeader(“Content-Type”,”application/x-www-form-urlencoded”);

Here the server doesn’t know what kind of data it can expect or is coming from our application.

We are making use of setRequestHeader function to tell the server about the content type we are going to send.

The server can get this information from request’s header that it recieves.

Content-Type  -> Name of the header

application/x-www-form-urlencoded -> http://www.w3.org/TR/html4/interact/forms.html#h-17.13.4.1

Bye

Calling Asp.NET web service from javascript (Ajax)-(Passing Parameter-GET)

Posted: October 22, 2007 in Ajax, ASP.NET
Tags:
13

Hi,

Now we will modify the application that we developed in the previous post to work with parameters

http://nishantrana.wordpress.com/2007/10/18/calling-aspnet-webservice-from-javascript-ajax/

1) First we will modify the default Hello World service to accept a parameter like this

[WebMethod]

public string HelloWorld(string Name)

{

return “Hello “+Name+”!”;

}

2) Add the html textbox control in the webform

<INPUT type=”text” id=”Info”>

3) Add the following in the body

<BODY onload=”getMessage()”>

4) Put the following script in our webpage.

<script language=”javascript”>

var xmlHttp;

function getMessage()

{

xmlHttp=new ActiveXObject(“Microsoft.XMLHTTP”);

xmlHttp.open(“get”, “http://localhost/WebService1/Service1.asmx/HelloWorld? name=’Nishant’”, true);

xmlHttp.onreadystatechange=doUpdate;

xmlHttp.send(); return false;

}

function doUpdate()

{

if(xmlHttp.readyState==4)

{

var xmlDoc=xmlHttp.responseXML;

var responseElement=xmlDoc.getElementsByTagName(“string”)[0];

var respText=responseElement.firstChild.nodeValue;

document.forms[0].elements['Info'].value=respText;

}

}

</script>

5) We have changed the method of passing the data to server from post to get as we are passing the value for Name by appending it in the url.

6) Right now if we run the application it will give us error as “object not found”.

7) The reason for the error is that we have to make our web service configured for get method.

8- We need to open web.config of our web service and add the following line inside system.web section

<webServices>

<protocols>

<add name=”HttpGet”/>

</protocols>

</webServices>

9) We need to build the service again

10) This time our application should work without any error.

Bye