Today, in this
article let's dig out another concept with its clear implementation. This
concept would be highly useful for day to day programming life and its one of
the main concept for WCF developers.
Question arises: What
is Data Contract?
It is type of standardize
relationship which can be established between service and client for data
exchange.
Question arises: What
is Data Member?
It is part of Data
Contract, which is used define some methods, properties which mainly plays an
active role during data exchange between client and service.
Question arises: How
Data Contract differs from message Contract?
Message Contract is that
which describes how the SOAP messages are sent to and from services with header
and bodies in the envelop. If you are more prescribed about sending message and
where by concentrating on layout then I would suggest you go for message
contract. On the other hand, the Data Contracts describes the data structure
with supported data types how the client can consume the WCF Service. In other
words, It is a standardize relationship between service and client to exchange
data.
The Complete Code of
DataContractClass.cs looks like this:
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Runtime.Serialization;
namespace
DataContract1
{
[DataContract]
public class
DataContractClass
{
private double
_firstNumber;
private double
_secondNumber;
private double
_dataresult;
public
DataContractClass(double firstnum,
double secondnum,
double result)
{
this._firstNumber
= firstnum;
this._secondNumber = secondnum;
this._dataresult = result;
}
public DataContractClass(DataContractClass
simple)
{
this._firstNumber =
simple._firstNumber;
this._secondNumber =
simple._secondNumber;
this._dataresult =
simple._dataresult;
}
[DataMember]
public double
FirstNumber
{
get {
return _firstNumber; }
set { _firstNumber =
value; }
}
[DataMember]
public double
SecondNumber
{
get {
return _secondNumber; }
set { _secondNumber =
value; }
}
[DataMember]
public double
DataResult
{
get {
return _dataresult; }
set { _dataresult =
value; }
}
}
}
The Complete Code of
IService1 looks like this:
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Runtime.Serialization;
using
System.ServiceModel;
using
System.ServiceModel.Web;
using
System.Text;
namespace
DataContract1
{
// NOTE: You can use the "Rename" command on the "Refactor"
menu to change the interface name "IService1" in both code and config file
together.
[ServiceContract]
public interface
IService1
{
[OperationContract]
DataContractClass Add(DataContractClass data);
[OperationContract]
DataContractClass Sub(DataContractClass data);
[OperationContract]
DataContractClass Mul(DataContractClass data);
[OperationContract]
DataContractClass Div(DataContractClass data);
}
}
The Complete Code of
Service1.svc looks like this:
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Runtime.Serialization;
using
System.ServiceModel;
using
System.ServiceModel.Web;
using
System.Text;
namespace
DataContract1
{
// NOTE: You can use the "Rename" command on the "Refactor"
menu to change the class name "Service1" in code, svc and config file together.
public class
Service1 : IService1
{
public DataContractClass
Add(DataContractClass data)
{
var result =
new DataContractClass(data);
result.DataResult = result.FirstNumber + result.SecondNumber;
return result;
}
public DataContractClass
Sub(DataContractClass data)
{
var result =
new DataContractClass(data);
result.DataResult = result.FirstNumber - result.SecondNumber;
return result;
}
public DataContractClass
Mul(DataContractClass data)
{
var result =
new DataContractClass(data);
result.DataResult = result.FirstNumber * result.SecondNumber;
return result;
}
public DataContractClass
Div(DataContractClass data)
{
var result =
new DataContractClass(data);
result.DataResult = result.FirstNumber / result.SecondNumber;
return result;
}
}
}
The Complete Code of
Web.Config looks like this:
<?xml
version="1.0"?>
<configuration>
<system.web>
<compilation
debug="true"
targetFramework="4.0"
/>
</system.web>
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid
disclosing metadata information, set the value below to false and remove the
metadata endpoint above before deployment
-->
<serviceMetadata
httpGetEnabled="true"/>
<!--
To receive exception details in faults for debugging purposes, set the value
below to true. Set to false before deployment to avoid disclosing exception
information -->
<serviceDebug
includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment
multipleSiteBindingsEnabled="true"
/>
</system.serviceModel>
<system.webServer>
<modules
runAllManagedModulesForAllRequests="true"/>
</system.webServer>
</configuration>
The Complete Code of
WebForm1.aspx looks like this:
<%@
Page Language="C#"
AutoEventWireup="true"
CodeBehind="WebForm1.aspx.cs"
Inherits="DataContractWCF.WebForm1"
%>
<!DOCTYPE
html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html
xmlns="http://www.w3.org/1999/xhtml">
<head
id="Head1" runat="server">
<title></title>
<style
type="text/css">
.div
{
font-family:
Cambria;
}
</style>
</head>
<body>
<form
id="form1"
runat="server">
<asp:ScriptManager
ID="ScriptManager1"
runat="server">
</asp:ScriptManager>
<asp:UpdatePanel
ID="UpdatePanel1"
runat="server">
<ContentTemplate>
<div
class="div">
<center>
Vijay's Arthimetic<br
/>
<table>
<tr>
<td>
<asp:Label
ID="Label1"
runat="server"
Text="Please Enter First
Number" Font-Bold="true"
ForeColor="Brown"
Font-Italic="true"></asp:Label>
</td>
<td>
<asp:TextBox
ID="TextBox1"
runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:Label
ID="Label2"
runat="server"
Text="Please Enter
Second Number" Font-Bold="true"
ForeColor="Brown"
Font-Italic="true"></asp:Label>
</td>
<td>
<asp:TextBox
ID="TextBox2"
runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button
ID="Button1"
runat="server"
Text="Addition Button"
Width="170px" OnClick="Button1_Click"
/>
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button
ID="Button2"
runat="server"
Text="Substraction
Button" Width="170px"
OnClick="Button2_Click"
/>
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button
ID="Button3"
runat="server"
Text="Multiplication
Button" Width="170px"
OnClick="Button3_Click"
/>
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button
ID="Button4"
runat="server"
Text="Division Button"
Width="170px" OnClick="Button4_Click"
/>
</td>
</tr>
</table>
<table>
<tr>
<td>
</td>
<td>
<asp:Label
ID="Label3"
runat="server"
Visible="false"
ForeColor="BlueViolet"
Font-Size="Larger"></asp:Label>
</td>
</tr>
</table>
</center>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
The Complete Code of
WebForm1.aspx.cs looks like this:
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
DataContractWCF.ServiceReference1;
namespace
DataContractWCF
{
public partial
class WebForm1
: System.Web.UI.Page
{
protected void
Page_Load(object sender,
EventArgs e)
{
TextBox1.Focus();
}
protected
void Button1_Click(object
sender, EventArgs e)
{
try
{
if (TextBox1.Text ==
"" || TextBox2.Text ==
"")
{
Label3.Text = "<b><i>Please
Enter Some Values";
Label3.Visible = true;
}
else
{
var objClient =
new Service1Client();
var objClass =
new DataContractClass();
objClass.FirstNumber = Convert.ToDouble(TextBox1.Text);
objClass.SecondNumber = Convert.ToDouble(TextBox2.Text);
var datares =
((IService1)objClient).Add(objClass);
Label3.Text = "The Addition of: "
+ objClass.FirstNumber + "  and  " +
objClass.SecondNumber + "  is :<b> "
+ datares.DataResult;
Label3.Visible = true;
TextBox1.Text = "";
TextBox2.Text = "";
}
}
catch (Exception
exception)
{
exception.Message.ToString();
}
}
protected
void Button2_Click(object
sender, EventArgs e)
{
try
{
if (TextBox1.Text ==
"" || TextBox2.Text ==
"")
{
Label3.Text = "<b><i>Please
Enter Some Values";
Label3.Visible = true;
}
else
{
var objClient =
new Service1Client();
var objClass =
new DataContractClass();
objClass.FirstNumber = Convert.ToDouble(TextBox1.Text);
objClass.SecondNumber = Convert.ToDouble(TextBox2.Text);
var datares =
((IService1)objClient).Sub(objClass);
Label3.Text = "The Substraction
of: " + objClass.FirstNumber + "  and
 " + objClass.SecondNumber + "  is
:<b> " + datares.DataResult;
Label3.Visible = true;
TextBox1.Text = "";
TextBox2.Text = "";
}
}
catch (Exception
exception)
{
exception.Message.ToString();
}
}
protected
void Button3_Click(object
sender, EventArgs e)
{
try
{
if (TextBox1.Text ==
"" || TextBox2.Text ==
"")
{
Label3.Text = "<b><i>Please
Enter Some Values";
Label3.Visible = true;
}
else
{
var objClient =
new Service1Client();
var objClass =
new DataContractClass();
objClass.FirstNumber = Convert.ToDouble(TextBox1.Text);
objClass.SecondNumber = Convert.ToDouble(TextBox2.Text);
var datares =
((IService1)objClient).Mul(objClass);
Label3.Text = "The
Multiplication of: " + objClass.FirstNumber +
"  and  " + objClass.SecondNumber +
"  is :<b> " + datares.DataResult;
Label3.Visible = true;
TextBox1.Text = "";
TextBox2.Text = "";
}
}
catch (Exception
exception)
{
exception.Message.ToString();
}
}
protected
void Button4_Click(object
sender, EventArgs e)
{
try
{
if (TextBox1.Text ==
"" || TextBox2.Text ==
"")
{
Label3.Text = "<b><i>Please
Enter Some Values";
Label3.Visible = true;
}
else
{
var objClient =
new Service1Client();
var objClass =
new DataContractClass();
objClass.FirstNumber = Convert.ToDouble(TextBox1.Text);
objClass.SecondNumber = Convert.ToDouble(TextBox2.Text);
var datares =
((IService1)objClient).Div(objClass);
Label3.Text = "The Division of: "
+ objClass.FirstNumber + "  and  " +
objClass.SecondNumber + "  is :<b> "
+ datares.DataResult;
Label3.Visible = true;
TextBox1.Text = "";
TextBox2.Text = "";
}
}
catch (Exception
exception)
{
exception.Message.ToString();
}
}
}
}
The Output of the
Application looks like this:
![DataContractOne.png]()
The Addition Operation
Output looks like this:
![DataContractTwo.png]()
The Invalid Data Results
Output looks like this:
![DataContractThree.png]()
I hope this article is
useful for you.