"Jaime Stuardo" <jstua***@manquehue.net> wrote in message
news:ujIk$IkOGHA.2604@TK2MSFTNGP09.phx.gbl...
> Hi all..
>
> I have programmed a composite control that is compound by one TextBox and
> one ImageButton. This is intended to be a popup calendar. All works well,
> except when the value is retrieved.
>
> For example, I placed that control inside a FormView control that is
> databound. When the page is ran and the user enters a date in the textbox,
> after he presses the submit image button on the page and it is posted back
> to the same page, the default date value is retrieved for the date when
> the datasource is going to update the record. When I debug the control, I
> can see that the date textbox contains a null value.
>
> This is the code of my control that is related to the date and the
> textbox.
>
> -------------------------------------------------------------
>
> [DefaultProperty("Date")]
> [ToolboxData("<{0}:DateSelector runat=server></{0}:DateSelector>")]
> public class DateSelector : CompositeControl
> {
>    private TextBox _txtDate = new TextBox();
>    private Image _imgCalendar = new Image();
>    private CompareValidator _dateCompareValidator = new
> CompareValidator();
>
>    #region " .Propiedades. "
>
>    [Bindable(true)]
>    [Category("Data")]
>    [DefaultValue("01/01/0001")]
>    [Localizable(true)]
>    [Description("Fecha seleccionada")]
>    public DateTime Date
>    {
>        get
>        {
>            EnsureChildControls();
>            return
> (_txtDate.Text.Equals(String.Empty))?DateTime.Today:DateTime.Parse(_txtDate.Text);
>        }
>        set
>        {
>            EnsureChildControls();
>            if (value == DateTime.MinValue)
>                _txtDate.Text = "";
>            else
>                _txtDate.Text = value.ToString("dd/MM/yyyy");
>        }
>    }
>
>    [Bindable(true)]
>    [Category("Appearance")]
>    [DefaultValue("")]
>    [Localizable(true)]
>    [Description("Imagen del botón del calendario")]
>    [Editor("System.Web.UI.Design.ImageUrlEditor, System.Design",
>    typeof(System.Drawing.Design.UITypeEditor))]
>    public string ImageFile
>    {
>        get
>        {
>            return _imgCalendar.ImageUrl;
>        }
>        set
>        {
>            _imgCalendar.ImageUrl = value;
>        }
>    }
>
>    #endregion
>
>    protected override void CreateChildControls()
>    {
>        // Agrega el textbox
>        _txtDate.ID = "txtDate";
>        _txtDate.Columns = 10;
>        this.Controls.Add(_txtDate);
>        // Agrega la imagen del calendario
>        _imgCalendar.ID = "imgCalendar";
>        string script = "javascript:popUpCalendar(this,
> document.getElementById('" + _txtDate.ClientID + "'), 'dd-mm-yyyy',
> '__doPostBack (document.getElementById(\\'" + _txtDate.ClientID +
> "\\'))')";
>        _imgCalendar.Attributes.Add("onclick", script);
>        _imgCalendar.ImageAlign = ImageAlign.AbsMiddle;
>        _imgCalendar.Attributes.Add("style", "cursor:hand;");
>        this.Controls.Add(_imgCalendar);
>        base.CreateChildControls();
>    }
>
>    protected override void OnPreRender(EventArgs e)
>    {
>        // Agrega el stylesheet del calendario
>        if (!String.IsNullOrEmpty(_urlStyleSheet))
>        {
>            HtmlLink style_link = new HtmlLink();
>            style_link.Attributes.Add("href",
> VirtualPathUtility.ToAbsolute(_urlStyleSheet));
>            style_link.Attributes.Add("rel", "stylesheet");
>            style_link.Attributes.Add("type", "text/css");
>            Page.Header.Controls.Add(style_link);
>        }
>        // Agrega el archivo JS
>        if (!String.IsNullOrEmpty(_urlScript))
>        {
>            // Inicializa la variable JS imgDir que contiene el path de las
> imágenes
>            HtmlGenericControl js_var = new HtmlGenericControl("script");
>            js_var.Attributes.Add("type", "text/javascript");
>            js_var.InnerHtml = "imgDir = '" +
> VirtualPathUtility.ToAbsolute(VirtualPathUtility.GetDirectory(_imgCalendar.ImageUrl))
> + "';";
>            Page.Header.Controls.Add(js_var);
>            // Incluye el archivo JS
>            HtmlGenericControl js = new HtmlGenericControl("script");
>            js.Attributes.Add("type", "text/javascript");
>            js.Attributes.Add("src",
> VirtualPathUtility.ToAbsolute(_urlScript));
>            Page.Header.Controls.Add(js);
>        }
>    }
>
>    protected override object SaveViewState()
>    {
>        EnsureChildControls();
>        object[] state = new object[2];
>        object objBase = base.SaveViewState();
>        state[0] = objBase;
>        state[1] = _txtDate.Text;
>        return state;
>    }
>
>    protected override void LoadViewState(object savedState)
>    {
>        object[] state = (object[])savedState;
>        base.LoadViewState(state[0]);
>        EnsureChildControls();
>        _txtDate.Text = state[1].ToString();
>    }
> }
>
> -------------------------------------------------------------
>
> Any help will be greatly appreciated
> Thanks
>
> Jaime
>