Display (Show) Success Message after Record Inserted (Form Submit) in ASP.NET

This code snippet will illustrate how to display (show) success message using JavaScript alert message box after record inserted (Form Submit) in ASP.NET.

HTML Markup

The following HTML Markup consists of a standard form with some fields and a Button to submit the form and insert the data into database.

<table border="0" cellpadding="0" cellspacing="0">
    <tr>
        <td> Name: </td>
        <td>
            <asp:TextBox ID="txtName" runat="server" /> </td>
    </tr>
    <tr>
        <td> City: </td>
        <td>
            <asp:TextBox ID="txtCity" runat="server" /> </td>
    </tr>
    <tr>
        <td> Country: </td>
        <td>
            <asp:TextBox ID="txtCountry" runat="server" /> </td>
    </tr>
    <tr>
        <td> </td>
        <td>
            <asp:Button ID="btnSave" Text="Save" runat="server" OnClick="Save" /> </td>
    </tr>
</table>

protected void Save(object sender, EventArgs e)
{
    //Insert record here.
    //Display success message.
    string message = "Your details have been saved successfully.";
    string script = "window.onload = function(){ alert('";
    script += message;
    script += "')};";
    ClientScript.RegisterStartupScript(this.GetType(), "SuccessMessage", script, true);
}