Problem with ViewState and Response.Redirect in ASP.Net

Hi

I have insert.aspx page that there are textboxs, DropDownlist and button that users can enter thier product information

I want when users click on button after it insert data in database it show text in lblerrorV and clear all text from textboxs and DropDown List so I used response.redirect

below is my bhind code

 protected void ImageButton2_Click1(object sender, ImageClickEventArgs e)
    {
        string data = Server.UrlDecode(Request.QueryString["BehCode"]);


        string price = RadioButton2.Checked ? TextBox1.Text : "null";
        SqlCommand _cmd = new SqlCommand("insertproduct4", _cn);
        _cmd.CommandType = CommandType.StoredProcedure;

        _cn.Open();

        _cmd.Parameters.AddWithValue("@Name", txtname.Text);
        _cmd.Parameters.AddWithValue("@Model", txtmodel.Text);
        _cmd.Parameters.AddWithValue("@Description", CKEditorControl1.Text);
        _cmd.Parameters.AddWithValue("@Price", price);

        _cmd.Parameters.AddWithValue("@Classification", DDL1.SelectedItem.Text);
        _cmd.Parameters.AddWithValue("@subset", DDL2.SelectedItem.Text);
        _cmd.Parameters.AddWithValue("@behcode", data);
        _cmd.Parameters.AddWithValue("@id", Convert.ToInt32(ViewState["Id"]));
        _cmd.Parameters.Add("@Result", SqlDbType.NVarChar, 90);
        _cmd.Parameters["@Result"].Direction = ParameterDirection.Output;


        object o = _cmd.ExecuteScalar();
        int ID = (o != null && o != DBNull.Value) ? Convert.ToInt32(o) : 0;

        if (ID > 0)
        {
            ViewState["Id"] = ID.ToString();
        }

        Response.Redirect(Request.Url.AbsoluteUri);

  

        _cn.Close();
      


        
        lblerrorV.Text = _cmd.Parameters["@Result"].Value.ToString();





    }

but here when I click on button it insert data in database and refresh page again but it didn't show any text in lblerrorV.Text  I want when it clear all texts from textbox and DDL it show text in lblerrorV.Text  too

what can I do?

Best Regards