Simple EmailAddress Textbox custom control

Question

User56700650 posted

I'm creating a custom control which contains a textbox, regular expression, and a few other properties, as well as a method Validate().
My problem is that when the server posts back all of the properties are null or their default values.

Can anyone point me in the right direction?

<mc:EmailTextBox ID="EmailTextBox1" runat="server" />

protected override void CreateChildControls( )
        {
            this.Controls.Clear( );
            this.Controls.Add( this.TxtEmail );
        }  

public bool Validate( )
        {
            bool isValid = false;

            if( this.IsRequired )
            {
                if( this.TxtEmail.Text.Length == 0 )
                {
                    isValid = false;
                }                
            }

            if( !String.IsNullOrEmpty( this.RegularExpression ) )
            {
                Regex reg = new Regex( this.RegularExpression );
                if( !reg.IsMatch( this.TxtEmail.Text ) )                               <--- is always null or empty
                {
                    isValid = false;
                }
                else
                {
                    isValid = true;
                }
            }
            else
            {
                isValid = true;
            }

            return isValid;
        }

 

Answer 1

User1790760290 posted

CreateChildControls( ) happened after validation, so you may need to move it before validation event like page_init

Answer 2

User-16411453 posted

 Forms require event handlers

OnInit instead of CreateChildControls 

Answer 3

User56700650 posted

For whatever reason if I inherit from TextBox instead of WebControl it works fine.

Answer 4

User-16411453 posted

You have to declare this.TxtEmail as private or public in declarations.  CreateChildControls just creates controls to be rendered on the page.

Validate has no idea that the control exist.