Bind Grid View using Session in ASP.Net

HTML 

The following HTML Markup consists of an ASP.Net GridView along with some TextBoxes and a Button in order to insert data in GridView control.

<asp:GridView ID="GridView1" runat="server" CssClass="Grid" AutoGenerateColumns="false"

    EmptyDataText="No records has been added.">

    <Columns>

        <asp:BoundField DataField="Name" HeaderText="Name" ItemStyle-Width="120" />

        <asp:BoundField DataField="Country" HeaderText="Country" ItemStyle-Width="120" />

    </Columns>

</asp:GridView>

<br />

<table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse">

    <tr>

        <td style="padding-bottom: 10px">

            Name:<br />

            <asp:TextBox ID="txtName" runat="server" />

        </td>

    </tr>

    <tr>

        <td style="padding-bottom: 10px">

            Country:<br />

            <asp:TextBox ID="txtCountry" runat="server" />

        </td>

    </tr>

    <tr>

        <td style="width: 100px">

            <asp:Button ID="btnAdd" runat="server" Text="Add" OnClick="Insert" />

        </td>

    </tr>

</table>

Namespace

using System.Data;

Code

protected void Page_Load(object sender, EventArgs e)

{

    if (!this.IsPostBack)

    {

        DataTable dt = new DataTable();

        dt.Columns.AddRange(new DataColumn[2] {new DataColumn("Name"), new DataColumn("Country") });

        Session["

BindData

"] = dt;

        this.BindGrid();

    }

}

protected void BindGrid()

{

    GridView1.DataSource = (DataTable)Session["

BindData

"];

    GridView1.DataBind();

}

protected void Insert(object sender, EventArgs e)

{

    DataTable dt = (DataTable)Session["Customers"];

    dt.Rows.Add(txtName.Text.Trim(), txtCountry.Text.Trim());

    Session["BindData"] = dt;

    this.BindGrid();

    txtName.Text = string.Empty;

    txtCountry.Text = string.Empty;

}