Creating a web
service for performing arithmetic operations
Introduction:
I am creating a web service for performing arithmetic operations or
say a calculator. Then, I will use this service in a windows based application
to perform arithmetic operations like a calculator. So, let's create a web
service. Following is the Code Snippet.
Now replace
the code on .asmx.cs page with the following code.
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using
System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
namespace calc
{
/// <summary>
/// Summary description for CalcWebService
/// </summary>
[WebService(Namespace
= "mycalculatorexample.org")]
[WebServiceBinding(ConformsTo =
WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script,
using ASP.NET AJAX, uncomment the following line.
//
[System.Web.Script.Services.ScriptService]
public
class CalcWebService
: System.Web.Services.WebService
{
[WebMethod]
public
string calculate(string
first, string second,
char sign)
{
string
result;
switch
(sign)
{
case '+':
{
result = (Convert.ToInt32(first) +
Convert.ToInt32(second)).ToString();
break;
}
case '-':
{
result = (Convert.ToInt32(first) -
Convert.ToInt32(second)).ToString();
break;
}
case '*':
{
result = (Convert.ToInt32(first) *
Convert.ToInt32(second)).ToString();
break;
}
case '/':
{
result = (Convert.ToInt32(first) /
Convert.ToInt32(second)).ToString();
break;
}
case '%':
{
result = (Convert.ToInt32(first) %
Convert.ToInt32(second)).ToString();
break;
}
default:
result = "Invalid";
break;
}
return
result;
}
}
}
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Run the application.
Output:
Go to test page by clicking at "calculate" -> do the entry and click the
"invoke" button.
It will show the result like the below figure. (After clicking the "invoke"
button)
Similarly, you can perform different operations like addition,
subtraction, multiplication, division and modulo division. Now we consume this
web service into window form application.
Create a windows application and add a service reference (You can get help
here
). After adding the reference, go to the design page and arrange the UI controls
like in the below figure.
Now, write the following code in the .cs file.
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using
System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Calculator
{
public partial
class Form1 :
Form
{
public Form1()
{
InitializeComponent();
}
string i, j;
static
char c;
private
void btnthree_Click(object
sender, EventArgs e)
{
textBox1.Text +=
Convert.ToString(3);
}
private
void btnone_Click(object
sender, EventArgs e)
{
textBox1.Text +=
Convert.ToString(1);
}
private
void btntwo_Click(object
sender, EventArgs e)
{
textBox1.Text +=
Convert.ToString(2);
}
private
void btnfour_Click(object
sender, EventArgs e)
{
textBox1.Text +=
Convert.ToString(4);
}
private
void btnfive_Click(object
sender, EventArgs e)
{
textBox1.Text +=
Convert.ToString(5);
}
private
void btnsix_Click(object
sender, EventArgs e)
{
textBox1.Text +=
Convert.ToString(6);
}
private
void btnseven_Click(object
sender, EventArgs e)
{
textBox1.Text +=
Convert.ToString(7);
}
private
void btneight_Click(object
sender, EventArgs e)
{
textBox1.Text +=
Convert.ToString(8);
}
private
void btnnine_Click(object
sender, EventArgs e)
{
textBox1.Text +=
Convert.ToString(9);
}
private
void btnzero_Click(object
sender, EventArgs e)
{
textBox1.Text +=
Convert.ToString(0);
}
private
void btnplus_Click(object
sender, EventArgs e)
{
i = textBox1.Text;
textBox1.Text =
"";
c = '+';
}
private
void btnminuse_Click(object
sender, EventArgs e)
{
i = textBox1.Text;
textBox1.Text =
"";
c =
'-';
}
private
void btnmultiply_Click(object
sender, EventArgs e)
{
i = textBox1.Text;
textBox1.Text =
"";
c =
'*';
}
private
void btndivide_Click(object
sender, EventArgs e)
{
i = textBox1.Text;
textBox1.Text =
"";
c =
'/';
}
private
void btnmodulo_Click(object
sender, EventArgs e)
{
i = textBox1.Text;
textBox1.Text =
"";
c =
'%';
}
private
void btnequal_Click(object
sender, EventArgs e)
{
j = textBox1.Text;
calclocalhost.CalcWebService obj =
new calclocalhost.CalcWebService();
textBox1.Text = obj.calculate(i,
j, c);
}
}
}
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Run the application.
Output:
You can work as calculator.
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