jQuery UI DatePicker Set default date as Current Date for TextBox in ASP.Net

Dear @ashishk,

The problem is with your system date format. the above example gives dateformat based on your system date format. if you want your required date format then use System.Globalization. please change below query with below example 

using System.Globalization;  // add this namespace for CultureInfo.InvariantCulture


public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        txtDate.Text = DateTime.Today.ToString("MM/dd/yyyy", CultureInfo.InvariantCulture);
    }

    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        string dt = Request.Form[txtDate.UniqueID];
    }
}

Hi ashishk,

Check this example. Now please take its reference and correct your code.

HTML

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.6/jquery.min.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
<link rel="Stylesheet" type="text/css" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css" />
<script type="text/javascript">
    $(function () {
        $("[id$=txtDate]").datepicker({
            showOn: 'button'
            , buttonImageOnly: true
            , buttonImage: 'https://i.imgur.com/u6upaAs.png'
            , dateFormat: 'mm/dd/yy'
        });
        $("[id$=txtDate]").datepicker("setDate", new Date());
    });
</script>
<asp:TextBox ID="txtDate" runat="server" ReadOnly="true"></asp:TextBox>
<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />

C#

protected void btnSubmit_Click(object sender, EventArgs e)
{
    string dt = Request.Form[txtDate.UniqueID];
}

VB.Net

Protected Sub btnSubmit_Click(sender As Object, e As System.EventArgs)
    Dim dt As String = Request.Form(txtDate.UniqueID)
End Sub

Screenshot