Accessing Web Services From CRM Forms
I have been very busy planning for our next release and I have to say, I am very excited about what we are doing next! More on that later........... I am still getting mail from folks asking how to access a web service from CRM forms. I thought I share a little JScript code that I used for some of my demos. This code accesses a public web service to get the exchange rate between US$ and a given currency. I did a MSN search and found a public web service; webservicex.net; that provides a public currency converter web service. Then I added one picklist and two fields to the Invoice Business Entity using the Customization tools in CRM V3.0: fabrikam_exchangerate (shows the exchange rate) and fabrikam_totalcurrency (shows the total amount in the selected currency).
Here is the code followed by a snapshot of the Customized CRM Invoice form. You can easily copy and paste this code into your OnChange, OnSave or OnLoad form event using the CRM V3.0 form editor. I added the code as an OnChange event to a new picklist (target currency) that I added earlier to the form.
// Declaring Some variable here including the web service to connect to
var
i=0; var j=0; var k=0; var r=0;
var
serverUrl = "https://www.webservicex.net";
//This is my picklist. I have already added three currency that i want to support the exchange to
switch
(parseInt(event.srcElement.DataValue, 10))
{
case 1:
i = "JPY";
break;
case 2:
i = "GBP";
break;
case 3:
i = "EUR";
break;
}
//Instantiating connection to the web service and calling the get method
var
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.open("get", serverUrl + "/CurrencyConvertor.asmx/ConversionRate?FromCurrency=USD&ToCurrency="+escape(i), false);
xmlhttp.send();
var
startTag = "<double xmlns=\"https://www.webserviceX.NET/\">";
var
endTag = "</double>";
var
exch;
var
valueStart = 0;
var
valueEnd = 0;
//Parsing the returned XML
valueStart = xmlhttp.responseXML.xml.indexOf(startTag, valueEnd) + startTag.length;
valueEnd = xmlhttp.responseXml.xml.indexOf(endTag, valueEnd+1);
exch = xmlhttp.responseXML.xml.substring(valueStart, valueEnd);
//Setting the Exchange rate on the custom attribute that i have added for this purpose earlier
crmForm.all.fabrikam_exchangerate.DataValue = parseFloat (exch);
j = crmForm.all.totalamount.DataValue;
var
kk = j*(parseFloat(exch));
//Calculating and setting the total sum in the selected currency
crmForm.all.fabrikam_totalcurrency.DataValue = kk;
