Custom Validator & SQL

Question

I don't know why I couldn't get this work: using System; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data; using System.Data.SqlClient; namespace DateValidatorControl { public class DateValidator : BaseValidator { private TextBox DatetoValidTextBox; public string _schedule = null; public string Schedule { get { return _schedule; } set { _schedule = value; } } protected override bool EvaluateIsValid() { bool result; Control ctrl = base.FindControl(base.ControlToValidate); DatetoValidTextBox = (TextBox)ctrl; string DatetoValid = DatetoValidTextBox.Text.ToString(); string connectStr = "server=10.1.1.1; uid=; pwd=; database=Temporary"; string SSQL = "Select ddate from TseparateD where schedule = '" + _schedule + "' and "; SSQL = SSQL + "ddate = '" + DatetoValid + "'"; SqlConnection connectObj = new SqlConnection(connectStr); SqlCommand commandObj = new SqlCommand(SSQL, connectObj); SqlDataReader readerObj; connectObj.Open(); readerObj = commandObj.ExecuteReader(); if(readerObj.Read()) { result=true; }else{ result=false; } readerObj.Close(); connectObj.Close(); return result; } } } ================================================= It got a parser error: Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: File or assembly name DateValidatorControl, or one of its dependencies, was not found. Source Error: Line 1: <%@ Page Language="C#" Debug="true" %> Line 2: <%@ Register TagPrefix="MEC" Namespace="DateValidatorControl" Assembly="DateValidatorControl" %> Line 3: <%@ Import Namespace="System.Data" %> Line 4: <%@ Import Namespace="System.Drawing" %> ================================================= any idea? I created another simple .dll file before, I can get that to work. So I think the location to pu the .dll should be correct. I am new to C#, sorry if it just got a stupid error.