"Shark Bait" wrote:

> I have a TextBox the implements IValidator and most everything works fine (it
> performs validation on the TextBox. Now I'd like to stick an "*" next to the
> TextBox when validation fails. Is it even possible? I'm starting to think I'm
> hosed.
>
> Here's the code...
> using System;
> using System.Drawing;
> using System.ComponentModel;
> using System.Web.UI.WebControls;
> using System.Web.UI;
> using System.Text.RegularExpressions;
>
> namespace MasterLibrary.WebCustomControls {
>
> public enum TextBoxType{FreeForm,NumbersOnly,Email}
>
> public class TextBox : System.Web.UI.WebControls.TextBox, IValidator{
>
> bool _isValid = true;
> string _errorMessage = "";
> bool _requiredField = false;
> string _friendlyFieldName = "";
> int _maxLength = 1;
> Color _validateHighlightColor = Color.White;
> TextBoxType _textBoxType;
>
> protected override void OnInit(EventArgs e) {
> base.OnInit(e);
> Page.Validators.Add(this);
>
> }
>
>
> protected override void OnUnload(EventArgs e) {
> if (Page != null) {
> Page.Validators.Remove(this);
> }
> base.OnUnload(e);
> }
>
>
> [Category("Company"), Description("A valid TextBoxType from the
> TextBoxType enum.")]
> public TextBoxType TextBoxType{
> get{return _textBoxType;}
> set{_textBoxType = value;}
> }
>
>
> [Category("Company"), Description("The number a characters that can be
> entered into this field. Must be more then 0 (zero).")]
> public override int MaxLength
> {
> get{return _maxLength;}
> set
> {
> if(value<=0)
> {
> _maxLength=1;
> base.MaxLength=_maxLength;
> throw(new Exception("You must specify a maximum length!"));
> }
> else
> {
> _maxLength = value;
> base.MaxLength=_maxLength;
> }
> }
> }
>
>
> [Browsable(false), Category("Company"), Description("Indicates if the
> control is valid. Can be used in validation on postback.")]
> public bool IsValid {
> get { return _isValid; }
> set {
> _isValid = value;
> if (!_isValid){
> //this.BackColor = _validateHighlightColor;
> this.BorderWidth=1;
> this.BorderColor= _validateHighlightColor;
> }else{
> this.BackColor = Color.White;
> }
> }
> }
>
>
> [Category("Company"), Description("The message that will be displayed for
> a required field.")]
> public string ErrorMessage{
> get { return _errorMessage; }
> set { _errorMessage = value; }
> }
>
>
> [Category("Company"), Description("Set to true if the field is required.")]
> public bool RequiredField {
> get { return _requiredField; }
> set { _requiredField = value; }
> }
>
>
> [Category("Company"), Description("This is the name used if presented to
> the user.")]
> public string FriendlyFieldName {
> get { return _friendlyFieldName; }
> set { _friendlyFieldName = value; }
> }
>
>
> [Category("Company"), Description("Set a color to set the background to if
> there is an error.")]
> public Color ValidateHighlightColor
> {
> get{return _validateHighlightColor;}
> set{_validateHighlightColor = value;}
> }
>
>
> public virtual void Validate(){
> this._isValid= true;
>
> if (this._requiredField) {
> bool isBlank = (this.Text.Trim() == "");
>
> if (isBlank){
> this.ErrorMessage = String.Format("{0}," + _errorMessage==""? " is a
> required field.":_errorMessage, this._friendlyFieldName);
> this._isValid = false;
> }
> }
>
> if(Regex.Match(this.Text.Trim(), @"[^\w\!@#$*()'%._\s]").Success){
> this.ErrorMessage = String.Format("{0}, contains illegal characters.",
> this._friendlyFieldName.Trim()== "" ? this.ID:this._friendlyFieldName);
> this._isValid = false;
> }
>
> if(_textBoxType == TextBoxType.FreeForm){
> // Nothing.
> }
> else if(_textBoxType == TextBoxType.Email){
> if(!Regex.IsMatch(this.Text.Trim(),
> @"\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*")){
> this.ErrorMessage = String.Format("{0}, must contain a valid email
> address.", this._friendlyFieldName.Trim()== "" ?
> this.ID:this._friendlyFieldName);
> this._isValid = false;
> }
> }
> else if(_textBoxType == TextBoxType.NumbersOnly){
> if(!Regex.IsMatch(this.Text.Trim(), @"^\d+")){
> this.ErrorMessage = String.Format("{0}, must contain numbers only.",
> this._friendlyFieldName.Trim()== "" ? this.ID:this._friendlyFieldName);
> this._isValid = false;
> }
> }
>
> }
>
>
> }
> }
>
> Thanks for your thoughts.