regularexpressionvalidator.cs

不错的人事管理系统

using System;
using System.Text.RegularExpressions;

namespace System.Web.UI.WebControls
{
	/// <summary>
	/// Summary description for RegularExpressionValidator.
	/// </summary>
	public class RegularExpressionValidator : BaseValidator
	{

		public RegularExpressionValidator() : base() 
		{
		}

		protected virtual void AddAttributesToRender(HtmlTextWriter writer) 
		{
			this.AddAttributesToRender(writer);
			if (this.RenderUplevel) 
			{
				writer.AddAttribute("evaluationfunction", "RegularExpressionValidatorEvaluateIsValid");
				if (this.ValidationExpression.Length > 0)
					writer.AddAttribute("validationexpression", this.ValidationExpression);
			}
		}

		protected override bool EvaluateIsValid() 
		{
			string local0;
			Match local1;
			bool local2;

			local0 = this.GetControlValidationValue(this.ControlToValidate);
			if (local0 == null || local0.Trim().Length == 0)
				return true;
			try 
			{
				local1 = System.Text.RegularExpressions.Regex.Match(local0, this.ValidationExpression);
				if (local1.Success && local1.Index == 0)
				{
//					goto i-1;
				}
				local2 = false;
			}
			catch  
			{
				local2 = true;
			}
			return local2;
		}

		public string ValidationExpression 
		{
			get
			{
				object local0;

				local0 = this.ViewState["ValidationExpression"];
				if (local0 != null)
					return (String) local0;
				return System.String.Empty;
			}
			set
			{
				try 
				{
					System.Text.RegularExpressions.Regex.IsMatch("", value);
				}
				catch (Exception local0) 
				{
					throw new HttpException(System.Web.HttpRuntime.FormatResourceString("Validator_bad_regex", value), local0);
				}
				this.ViewState["ValidationExpression"]= value;
			}

		}
	}
}