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We want to retrieve data from the following database table tblEmployee
The retrieved data should be displayed as shown below
Step 1 : Create SQL Server table and insert employee data
Step 2 : Create a stored procedure to retrieve employee data by ID
Step 3 : Create new asp.net web application project. Name it Demo.
Step 4 : Include a connection string in the web.config file to your database.
Step 5 : Add a class file to the project. Name it Employee.cs. Copy and paste the following code.
Step 6 : Add a new WCF Service (Ajax-enabled). Name it EmployeeService.svc. Copy and paste the following code.
Step 7 : Add an HTML page to the ASP.NET project. Copy and paste the following HTML and jQuery code
Part 65 - Check if username exists in database with ajax
Part 66 - How to suggest available username
Part 67 - Calling aspx page method using jquery
In this video we will discuss, how to call WCF Service using jQuery AJAX
We want to retrieve data from the following database table tblEmployee
The retrieved data should be displayed as shown below
Step 1 : Create SQL Server table and insert employee data
Create table tblEmployee
(
Id int primary
key identity,
Name nvarchar(50),
Gender nvarchar(10),
Salary int
)
GO
Insert into tblEmployee values ('Mark', 'Male', 50000)
Insert into tblEmployee values ('Sara', 'Female', 60000)
Insert into tblEmployee values ('John', 'Male', 45000)
Insert into tblEmployee values ('Pam', 'Female', 45000)
GO
Step 2 : Create a stored procedure to retrieve employee data by ID
Create procedure spGetEmployeeById
@Id int
as
Begin
Select ID, Name, Gender, Salary
from tblEmployee
where ID = @Id
End
Step 3 : Create new asp.net web application project. Name it Demo.
Step 4 : Include a connection string in the web.config file to your database.
<add name="DBCS"
connectionString="server=.;database=SampleDB;integrated security=SSPI" />
Step 5 : Add a class file to the project. Name it Employee.cs. Copy and paste the following code.
namespace Demo
{
public class Employee
{
public int ID { get; set; }
public string Name { get; set; }
public string Gender { get; set; }
public int Salary { get; set; }
}
}
Step 6 : Add a new WCF Service (Ajax-enabled). Name it EmployeeService.svc. Copy and paste the following code.
using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.ServiceModel;
using System.ServiceModel.Activation;
namespace Demo
{
[ServiceContract(Namespace = "")]
[AspNetCompatibilityRequirements(RequirementsMode =
AspNetCompatibilityRequirementsMode.Allowed)]
public class EmployeeService
{
[OperationContract]
public Employee GetEmployeeById(int employeeId)
{
Employee employee = new Employee();
string cs = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
using (SqlConnection con = new SqlConnection(cs))
{
SqlCommand cmd = new SqlCommand("spGetEmployeeById", con);
cmd.CommandType = CommandType.StoredProcedure;
SqlParameter parameter = new SqlParameter();
parameter.ParameterName = "@Id";
parameter.Value = employeeId;
cmd.Parameters.Add(parameter);
con.Open();
SqlDataReader rdr = cmd.ExecuteReader();
while (rdr.Read())
{
employee.ID = Convert.ToInt32(rdr["Id"]);
employee.Name = rdr["Name"].ToString();
employee.Gender = rdr["Gender"].ToString();
employee.Salary = Convert.ToInt32(rdr["Salary"]);
}
}
return employee;
}
}
}
Step 7 : Add an HTML page to the ASP.NET project. Copy and paste the following HTML and jQuery code
<html>
<head>
<script src="jquery-1.11.2.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$('#btnGetEmployee').click(function () {
var empId = $('#txtId').val();
$.ajax({
url: 'EmployeeService.svc/GetEmployeeById',
method: 'post',
contentType: "application/json;charset=utf-8",
data: JSON.stringify({
employeeId: empId }),
dataType: 'json',
success: function (data) {
$('#txtName').val(data.d.Name);
$('#txtGender').val(data.d.Gender);
$('#txtSalary').val(data.d.Salary);
},
error: function (err) {
alert(err);
}
});
});
});
</script>
</head>
<body style="font-family:Arial">
ID :
<input id="txtId" type="text" style="width: 86px" />
<input type="button" id="btnGetEmployee" value="Get
Employee" />
<br /><br />
<table border="1" style="border-collapse: collapse">
<tr>
<td>Name</td>
<td><input id="txtName" type="text" /></td>
</tr>
<tr>
<td>Gender</td>
<td><input id="txtGender" type="text" /></td>
</tr>
<tr>
<td>Salary</td>
<td><input id="txtSalary" type="text" /></td>
</tr>
</table>
</body>
</html>
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