CRM Dynamics 2015插件转换错误，指定的转换无效

Question

Below is a snippet of the code for the plugin, I also added the WCF service to be consumed(code) as well.

PLUGIN CODE BELOW

if (context.InputParameters.Contains("Target") &&  context.InputParameters["Target"] is Entity)
            {

            Entity phoneCallEntity = (Entity)context.InputParameters["Target"];

            if (phoneCallEntity.LogicalName != "phonecall")
                return;

            if (context.MessageName == "Create")
            {
                try
                {

                    int NumberToCall = phoneCallEntity.Attributes.Contains("phonenumber") ? (int)phoneCallEntity.Attributes["phonenumber"] : 0;
                    int ReceiveCallOn = phoneCallEntity.Attributes.Contains("new_destination") ? (int)phoneCallEntity.Attributes["new_destination"] : 0;
                    string apiKey = phoneCallEntity.Attributes.Contains("new_apikey") ? phoneCallEntity.Attributes["new_apikey"].ToString() : null;
                    int fId = phoneCallEntity.Attributes.Contains("new_fid") ? (int)phoneCallEntity.Attributes["new_fid"] : 0;

                    BasicHttpBinding binding = new BasicHttpBinding();
                    binding.Name = "BasicHttpBinding_IService1";

Here i call the service

 binding.SendTimeout = new TimeSpan(0, 10, 0);
 EndpointAddress endPointAddress = new EndpointAddress("http://localhost:62009/Service1.svc");
 ServiceReference1.Service1Client client = new ServiceReference1.Service1Client(binding, endPointAddress);
 client.WebCall(NumberToCall, ReceiveCallOn, apiKey, fId);

Above I call the WCF Service

public void WebCall(Int64 NumberToCall, Int64 ReceiveCallOn, string APIkey, int FID)
    {
        string url = string.Format("https://xxxx{0},{1},{2}", NumberToCall, ReceiveCallOn, APIkey, FID);
        WebRequest webRequest = WebRequest.Create(url);
        WebResponse webResp = webRequest.GetResponse();
        webRequest.Method = "POST";
    }

Code snippet above is the actual WCF Service being consumed, So the issue is with the casting of the Number toi call and the ReceiveCallOn number, they are both cell phone numbers , in CRM they are a phone data type, any ideas why I cannot cast this.

Answer 1

the field phonenumber from entity phonecall is Single Type of Text (with format Phone ), this means that is a string (as your custom field if the field settings are the same) so your code can be:

string NumberToCall = phoneCallEntity.Contains("phonenumber") ? phoneCallEntity["phonenumber"].ToString() : "";
string ReceiveCallOn = phoneCallEntity.Contains("new_destination") ? phoneCallEntity["new_destination"].ToString() : "";

Answer 2

You should rather use Parse or TryParse . Just casting to int will sometimes convert a char character to its asci value, or have an exception on NULL values. Since you are working with user input I guess the following should be saver. (if you absolutely want int's the below should be ok), I do however agree with the previous post\\answer that you should look at working, with strings rather.

so ...

var NumberToCall =0;
var ReceiveCallOn =0;

if (phoneCallEntity.Contains("phonenumber"))
   int.TryParse(phoneCallEntity["phonenumber"].ToString(), out NumberToCall);
if (phoneCallEntity.Contains("new_destination") )
   int.TryParse(phoneCallEntity["new_destination"].ToString(), out ReceiveCallOn);

... just taking your parse exception into consideration .

Or just Parse

if (phoneCallEntity.Contains("phonenumber"))
{
    int NumberToCall = int.Parse(phoneCallEntity["phonenumber"].ToString());
}
if (phoneCallEntity.Contains("new_destination"))
{
    int ReceiveCallOn = int.Parse(phoneCallEntity["new_destination"].ToString());
}