Properties of Web Method in Web Service in Asp.Net

Properties of Web Method in Web Service:-

• The Buffer Response
• The Cache Duration
• The Description
• The Enable Session
• The Message Name
• The Transaction Option

The Buffer Response:-

• It enables buffering response for a Web method.
• The Buffer Response might be True or False. When set to 'True' then  default setting is true.
• Asp.Net buffers the entire response before sending it down to the client.
• The Buffer Response set to 'False' asp.net buffers the response in the chunks of 16 KB.
• If we don't want  entire control of the response in memory at once then we can set buffer response to false.

Example:-

public class Service1: System.Web.Service.WebService

{

   [WebMothod (Buffer Response :=False)]

     public void Getdata()

    {  

      . . . . . .

    }

}

The Cache Duration:-

• It enables caching of the results for a web method.
• Syntax:- [WebMethod(CacheDuration:=Property Value)]
• Here the property value is number of seconds the response should be held in the cache.
• The Dafault is '0' which means the response is not cached.
• Asp.Net will cache the results for each unique parameter set.

Example:-

[WebMothod (Cache Duration :=60)]

public double ConvertTemp(double dfHeat)
{ 
return ((dfHeat -32) * 5 )% 9);
}

Enable Session:-

• It enables the session state for Web Service Method.
• Session State is not needed for web service method, the disabling it improve the performance.
• The default enable session is  "False"

Example:-

[WebMethod (EnableSession:= False)]

public int SessionHitCounter()

{

   if(Session["HitCount"] == "")

   {

     Session["HitCount"] = 1;

   }

   else

   {

     Session["HitCount"] = CInt("HitCount") + 1;

    Return CINT("HitCount");

  }

}

Message Name:-

• It enables the WebService to iuniquly identify  overloaded method using an Alias.
• The default value is method name.
• When specifying the method name, the resulting SOAP message will reflect this name instead of the actual method name.

Example:-

[WebMethod (MessageName:= "Add Double")]

public double add1(double dValue, Double Dvalue1)

{

  return dValue1 + dValue2;

}

Transaction Options:- 

It Enables to patispate as the root element.

It has the following values.

• Disabled
• Not Supported
• Supported
• Required
• Required New

Disabled:- It indicates web service method doe not run with the transaction.

Example: [WebMethod (Transactionoption = Transactionoption.Disabled)

NotSupported: It indicates the the web service method doe not run with in  the scope of a transaction.

Example: [WebMethod (Transactionoption = Transactionoption.Notsupported)

Supported: runs with the scope of a transaction

Example: [WebMethod (Transactionoption = Transactionoption.Supported)

Required: Indicates that the Web Service requires a transaction.

Example: [WebMethod (Transactionoption = Transactionoption.Required)

Required New: Indicates that the Web Service requires new transaction.

Example: [WebMethod (Transactionoption = Transactionoption.RequiredNew)