Bind ASP.Net GridView with TemplateField using jQuery AJAX and WebMethod

Hey Sowmya90,

Please refer below sample.

HTML

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
    $(function () {
        GetCustomers();
    });   
    function GetCustomers() {
        $.ajax({
            type: "POST",
            url: "CS.aspx/GetCustomers",
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: OnSuccess,
            failure: function (response) {
                alert(response.d);
            },
            error: function (response) {
                alert(response.d);
            }
        });
    }

    function OnSuccess(response) {
        var xmlDoc = $.parseXML(response.d);
        var xml = $(xmlDoc);
        var customers = xml.find("Customers");
        var row = $("[id*=gvCustomers] tr:last-child").clone(true);
        $("[id*=gvCustomers] tr").not($("[id*=gvCustomers] tr:first-child")).remove();
        $.each(customers, function () {
            var customer = $(this);
            $(".CustomerId", row).html($(this).find("CustomerId").text());
            $(".Name", row).val($(this).find("Name").text());
            var country = $(this).find("Country").text();
            var options = row.find('[id*=ddlCountry] option');
            $.each($(options), function () {

                if ($(this).html() == country) {
                    $(this).attr('selected', 'selected');
                }
            });
            $(".Country", row).val($(this).find("Country").text());
            $("[id*=gvCustomers]").append(row);
            row = $("[id*=gvCustomers] tr:last-child").clone(true);
        });
    };
</script>
<asp:GridView runat="server" ID="gvCustomers" CssClass="myGvClass" ClientIDMode="Static"
    EmptyDataText="No Data found" ShowHeaderWhenEmpty="true" AutoGenerateColumns="False">
    <Columns>
        <asp:TemplateField HeaderText="CustomerId">
            <ItemTemplate>
                <asp:Label ID="txtCustomerId" runat="server" Text='<%# Bind("CustomerId") %>' CssClass="CustomerId"></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Name">
            <ItemTemplate>
                <asp:TextBox ID="txtName" runat="server" Text='<%# Bind("Name") %>' CssClass="Name"></asp:TextBox>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Country">
            <ItemTemplate>
                <asp:DropDownList runat="server" ID="ddlCountry">
                    <asp:ListItem Value="0">United State</asp:ListItem>
                    <asp:ListItem Value="1">India</asp:ListItem>
                    <asp:ListItem Value="2">France</asp:ListItem>
                    <asp:ListItem Value="3">Russia</asp:ListItem>
                </asp:DropDownList>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Namespaces

C#

using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Web.Services;

VB.Net

Imports System.Web.Services
Imports System.Data.SqlClient
Imports System.Data

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        BindDummyRow();
    }
}

private void BindDummyRow()
{
    DataTable dummy = new DataTable();
    dummy.Columns.Add("CustomerId");
    dummy.Columns.Add("Name");
    dummy.Columns.Add("Country");
    dummy.Rows.Add();
    gvCustomers.DataSource = dummy;
    gvCustomers.DataBind();
}

[WebMethod]
public static string GetCustomers()
{
    string query = "SELECT CustomerId, Name, Country From Customers";
    SqlCommand cmd = new SqlCommand(query);
    return GetData(cmd).GetXml();
}

private static DataSet GetData(SqlCommand cmd)
{
    string strConnString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    using (SqlConnection con = new SqlConnection(strConnString))
    {
        using (SqlDataAdapter sda = new SqlDataAdapter())
        {
            cmd.Connection = con;
            sda.SelectCommand = cmd;
            using (DataSet ds = new DataSet())
            {
                sda.Fill(ds, "Customers");
                DataTable dt = new DataTable();
                ds.Tables.Add(dt);
                return ds;
            }
        }
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not IsPostBack Then
        BindDummyRow()
    End If
End Sub

Private Sub BindDummyRow()
    Dim dummy As DataTable = New DataTable()
    dummy.Columns.Add("CustomerId")
    dummy.Columns.Add("Name")
    dummy.Columns.Add("Country")
    dummy.Rows.Add()
    gvCustomers.DataSource = dummy
    gvCustomers.DataBind()
End Sub

<WebMethod()>
Public Shared Function GetCustomers() As String
    Dim query As String = "SELECT CustomerId, Name, Country From Customers"
    Dim cmd As SqlCommand = New SqlCommand(query)
    Return GetData(cmd).GetXml()
End Function

Private Shared Function GetData(ByVal cmd As SqlCommand) As DataSet
    Dim strConnString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Using con As SqlConnection = New SqlConnection(strConnString)
        Using sda As SqlDataAdapter = New SqlDataAdapter()
            cmd.Connection = con
            sda.SelectCommand = cmd
            Using ds As DataSet = New DataSet()
                sda.Fill(ds, "Customers")
                Dim dt As DataTable = New DataTable()
                ds.Tables.Add(dt)
                Return ds
            End Using
        End Using
    End Using
End Function

Screenshot