Hi rani,
Check this example. Now please take its reference and correct your code.
Database
I have made use of the following table Customers with the schema as follows.
I have already inserted few records in the table.
You can download the database table SQL by clicking the download link below.
Download SQL file
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<script type="text/javascript">
var app = angular.module('MyApp', []);
app.controller('MyController', function ($scope, $http, $window) {
PopulateCustomers();
function PopulateCustomers() {
$http.post("Default.aspx/BindCustomers", { headers: { 'Content-Type': 'application/json'} })
.then(function (response) {
$scope.Customers = eval(response.data.d);
});
}
$scope.Delete = function () {
var selected = "";
for (var i = 0; i < $scope.Customers.length; i++) {
if ($scope.Customers[i].Selected != undefined && $scope.Customers[i].Selected) {
selected += $scope.Customers[i].Id + ",";
}
}
$http.post("Default.aspx/Delete", { ids: selected }, { headers: { 'Content-Type': 'application/json'} })
.then(function (response) {
PopulateCustomers();
});
}
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div ng-app="MyApp" ng-controller="MyController">
<table>
<thead>
<tr>
<th>Action</th>
<th>Id</th>
<th>Name</th>
<th>Country</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="customer in Customers">
<td><input type="checkbox" name="Selected" ng-model="customer.Selected" /></td>
<td>{{ customer.Id }}</td>
<td>{{ customer.Name }}</td>
<td>{{ customer.Country }}</td>
</tr>
</tbody>
</table>
<br />
<input type="button" value="Delete Selected" ng-click="Delete()" />
</div>
</form>
</body>
</html>
Namespaces
C#
using System.Collections.Generic;
using System.Configuration;
using System.Data.SqlClient;
using System.Web.Script.Serialization;
using System.Web.Services;
VB.Net
Imports System.Collections.Generic
Imports System.Configuration
Imports System.Data.SqlClient
Imports System.Web.Script.Serialization
Imports System.Web.Services
Code
C#
[WebMethod]
public static string BindCustomers()
{
List<object> customers = new List<object>();
string sql = "SELECT * FROM Customers";
using (SqlConnection conn = new SqlConnection())
{
conn.ConnectionString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlCommand cmd = new SqlCommand(sql))
{
cmd.Connection = conn;
conn.Open();
using (SqlDataReader sdr = cmd.ExecuteReader())
{
while (sdr.Read())
{
customers.Add(new
{
Id = sdr["CustomerId"],
Name = sdr["Name"],
Country = sdr["Country"]
});
}
}
conn.Close();
}
return (new JavaScriptSerializer().Serialize(customers));
}
}
[WebMethod]
public static void Delete(string ids)
{
using (SqlConnection conn = new SqlConnection())
{
conn.ConnectionString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlCommand cmd = new SqlCommand("DELETE FROM Customers WHERE CustomerID IN (" + ids.TrimEnd(',') + ")"))
{
cmd.Connection = conn;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
}
}
VB.Net
<WebMethod()>
Public Shared Function BindCustomers() As String
Dim customers As List(Of Object) = New List(Of Object)()
Dim sql As String = "SELECT * FROM Customers"
Using conn As SqlConnection = New SqlConnection()
conn.ConnectionString = ConfigurationManager.ConnectionStrings("constr").ConnectionString
Using cmd As SqlCommand = New SqlCommand(sql)
cmd.Connection = conn
conn.Open()
Using sdr As SqlDataReader = cmd.ExecuteReader()
While sdr.Read()
customers.Add(New With {
.Id = sdr("CustomerId"),
.Name = sdr("Name"),
.Country = sdr("Country")
})
End While
End Using
conn.Close()
End Using
Return (New JavaScriptSerializer().Serialize(customers))
End Using
End Function
<WebMethod()>
Public Shared Sub Delete(ByVal ids As String)
Using conn As SqlConnection = New SqlConnection()
conn.ConnectionString = ConfigurationManager.ConnectionStrings("constr").ConnectionString
Using cmd As SqlCommand = New SqlCommand("DELETE FROM Customers WHERE CustomerID IN (" & ids.TrimEnd(","c) & ")")
cmd.Connection = conn
conn.Open()
cmd.ExecuteNonQuery()
conn.Close()
End Using
End Using
End Sub
Screenshot
