Error: System.ArgumentException: Cannot convert to System.Int32.

  • Thread starter Thread starter Simon Harris
  • Start date Start date
S

Simon Harris

I have created a web service, which when I call in my browser presents the
text form etc. When I click the button, I get this error:

System.ArgumentException: Cannot convert to System.Int32.
Parameter name: type ---> System.FormatException: Input string was not in
a
correct format.
at System.Number.ParseInt32(String s, NumberStyles style,
NumberFormatInfo info)
at System.String.System.IConvertible.ToInt32(IFormatProvider provider)
at System.Convert.ChangeType(Object value, Type conversionType,
IFormatProvider provider)
at System.Web.Services.Protocols.ScalarFormatter.FromString(String
value,
Type type)
--- End of inner exception stack trace ---
at System.Web.Services.Protocols.ScalarFormatter.FromString(String
value,
Type type)
at
System.Web.Services.Protocols.ValueCollectionParameterReader.Read(NameValu
eCollection
collection)
at
System.Web.Services.Protocols.HtmlFormParameterReader.Read(HttpRequest
request)
at System.Web.Services.Protocols.HttpServerProtocol.ReadParameters()
at System.Web.Services.Protocols.WebServiceHandler.Invoke()
at
System.Web.Services.Protocols.WebServiceHandler.CoreProcessRequest()This
seems to happen only when I have parameters of different data types, e.g.:

Works:
======
<WebMethod()> _
Public Function GetAddresses(ByVal a As String, ByVal b As String) As
DataSet

Causes Error:
===========
<WebMethod()> _
Public Function GetAddresses(ByVal a As String, ByVal b As Integer) As
DataSet

Any ideas/suggestions will be much appreciated.



Regards,

Simon.
 
Hi Simon,

Are you able to show some of the code that is calling this Web service?

If the SOAP defaults the type to a string, your Web service is going to have
the problem you're seeing if it expects an integer.

Ken
MVP [ASP.NET]
 
Ken Cox said:
Hi Simon,

Are you able to show some of the code that is calling this Web service?

If the SOAP defaults the type to a string, your Web service is going to
have the problem you're seeing if it expects an integer.

Ken
MVP [ASP.NET]
Click to expand...

Hi Ken,

I solved it earlier - You were correct, it was expecting an Int, I was
passing it null.

Many Thanks for your reply.

Simon.
 
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