ASP.Net Insert Date in Database Error: String was not recognized as a valid DateTime

Hey

Refer below sample.

HTML

<asp:ScriptManager runat="server" />
<div class=" input-group date form_date">
    <asp:TextBox ID="txt_todate" class="form-control years hasDatepicker" placeholder="Enter Date"
        runat="server"></asp:TextBox>
    <span class="input-group-addon"><a href="#"><i id="Image2" class="fa fa-calendar"></i>
    </a>
        <cc1:CalendarExtender ID="CalendarExtender2" runat="server" TargetControlID="txt_todate"
            CssClass="" Format="MM/dd/yyyy" Enabled="True" PopupButtonID="txt_todate" />
    </span>
</div>
<asp:Button Text="Insert" runat="server" OnClick="Insert" />

Namespaces

C#

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

VB.Net

Imports System.Data.SqlClient

Code

C#

protected void Insert(object sender, EventArgs e)
{
    string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("INSERT INTO TestDate VALUES(@Date)", con))
        {
            cmd.Parameters.AddWithValue("@Date", txt_todate.Text);
            con.Open();
            cmd.ExecuteNonQuery();
            con.Close();
        }
    }
}

VB.Net

Protected Sub Insert(ByVal sender As Object, ByVal e As EventArgs)
    Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Using con As SqlConnection = New SqlConnection(constr)
        Using cmd As SqlCommand = New SqlCommand("INSERT INTO TestDate VALUES(@Date)", con)
            cmd.Parameters.AddWithValue("@Date", txt_todate.Text)
            con.Open()
            cmd.ExecuteNonQuery()
            con.Close()
        End Using
    End Using
End Sub