i'm not able to hide ajax modalpopupextender

 

CancelControlID="Button2" BackgroundCssClass="Background" >

 

 index.aspx.cs page code

 

public partial class WebForm1 : System.Web.UI.Page
{

 

/*Some code here*/

public void HidePopup()

}

}

 

 I have another page where i write code of popup

 

Enruiry

Full Name

Email id

State

City

Mobile No.



ControlToValidate="TextBoxMobile" ErrorMessage="*" ValidationExpression="[0-9]{10}">

 Popup.aspx.cs page code

 

protected void btnSubmit_Click(object sender, EventArgs e)
{
string con = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
try
{
if (Page.IsValid)
{

using (SqlConnection connection = new SqlConnection())
{
connection.ConnectionString = con;

SqlCommand cmd = new SqlCommand();
cmd.Connection = connection;
cmd.CommandText = "spInsertEnquiry";
cmd.CommandType = System.Data.CommandType.StoredProcedure;

cmd.Parameters.AddWithValue("@fname", TextBoxFullName.Text);
cmd.Parameters.AddWithValue("@email", TextBoxEmail.Text);
cmd.Parameters.AddWithValue("@state", TextBoxState.Text);
cmd.Parameters.AddWithValue("@city", TextBoxCity.Text);
cmd.Parameters.AddWithValue("@mobilephone", TextBoxMobile.Text);

connection.Open();
cmd.ExecuteNonQuery();
}
}
}

catch
{

}

WebForm1 ob = new WebForm1();
ob.HidePopup();
}

 

Error :  object reference not set to an instance