Display Bootstrap Modal Popup after record inserted in ASP.Net

Hi Ruben12345,

Please refer below sample.

HTML

<script type="text/javascript" src='https://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.8.3.min.js'></script>
<script type="text/javascript" src='https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.0.3/js/bootstrap.min.js'></script>
<link rel="stylesheet" href='https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.0.3/css/bootstrap.min.css'
    media="screen" />
<script type="text/javascript">
    function ShowPopup(name, country) {
        $("#MyPopup #lblName").html(name);
        $("#MyPopup #lblCountry").html(country);
        $("#MyPopup").modal("show");
    }
</script>
<div id="MyPopup" class="modal fade" role="dialog">
    <div class="modal-dialog">
        <!-- Modal content-->
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal">
                    &times;</button>
                <h4 class="modal-title">
                </h4>
            </div>
            <div class="modal-body">
                <span id="lblName"></span>
                <br />
                <span id="lblCountry"></span>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-danger" data-dismiss="modal">
                    Close</button>
            </div>
        </div>
    </div>
</div>
<div>
    Name :
    <asp:TextBox ID="txtName" runat="server" />
    <br />
    Country :
    <asp:TextBox ID="txtCountry" runat="server" />
    <br />
    <asp:Button ID="Button1" Text="Insert" runat="server" OnClick="Insert" />
</div>

Namespaces

C#

using System.Data.SqlClient;
using System.Configuration;

VB.Net

Imports System.Data.SqlClient

Code

C#

protected void Insert(object sender, EventArgs e)
{
    using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ConnectionString))
    {
        using (SqlCommand cmd = new SqlCommand("INSERT INTO Customers(Name, Country) VALUES(@Name,@Country)", con))
        {
            cmd.Parameters.AddWithValue("@Name", txtName.Text);
            cmd.Parameters.AddWithValue("@Country", txtCountry.Text);
            con.Open();
            int i = 0;
            i = cmd.ExecuteNonQuery();
            con.Close();
            if (i > 0)
            {
                ClientScript.RegisterStartupScript(this.GetType(), "Popup", "ShowPopup('" + txtName.Text + "', '" + txtCountry.Text + "');", true);
            }
        }
    }
}

VB.Net

Protected Sub Insert(ByVal sender As Object, ByVal e As EventArgs)
    Using con As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("constr").ConnectionString)
        Using cmd As SqlCommand = New SqlCommand("INSERT INTO Customers(Name, Country) VALUES(@Name,@Country)", con)
            cmd.Parameters.AddWithValue("@Name", txtName.Text)
            cmd.Parameters.AddWithValue("@Country", txtCountry.Text)
            con.Open()
            Dim i As Integer = 0
            i = cmd.ExecuteNonQuery()
            con.Close()
            If i > 0 Then
                ClientScript.RegisterStartupScript(Me.[GetType](), "Popup", "ShowPopup('" & txtName.Text & "', '" + txtCountry.Text & "');", True)
            End If
        End Using
    End Using
End Sub

Screenshot