Bind User Control inside a GridView

Hi guys;

I'm trying to bind a property of one User Control but it doesn't work. The User Control is inside a GridView.

//Just an example<asp:GridView ID="gvTraining" runat="server" ><Columns><asp:TemplateField><ItemTemplate><uc2:ExportFormTreinamento ID="Export" runat="server" CodigoTreinamento='<%# (int)Eval("TREI_CD_TREINAMENTO") %>' /></ItemTemplate></asp:TemplateField></Columns></asp:GridView>

The property "CodigoTreinamento" belongs to my UserControl.

    //UserControl
    public partial class ExportFormTreinamento : System.Web.UI.UserControl
    {
        private int _codigoTreinamento { get; set; }

        public int CodigoTreinamento
        {
            get { return _codigoTreinamento; }
            set { _codigoTreinamento = value; }
        }

        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void lbtnExportFormulario_Click(object sender, EventArgs e)
        {
            if (_codigoTreinamento > 0)
            {
            }
        }
    }

The method set is working fine but when the User Control is selected the property "CodigoTreinamento" has value 0.

I saw in another forum a question about it (link) and I'm doing almost the same thing. I tried to use "this.DataBind()" in the set method but it also doesn't work.

Any idea about what to do to fix this problem?

PS.: I'm using Update Panel. Would be it the reason of this problema?

Deise Vicentin
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