Bdtjtk

Since I'm using many viewstates, I'm trying to stop relying on them because pages take forever to load. I have this repeater with a table and when I click a button it enables a form that has another repeater. I need to pass the ID of the row of the 1st repeater so i can update the data related to that item on submit button.

Note. The ID i need is on the 1st column of repeater

<td>

    <asp:Label ID="lblIdRegisto" runat="server" Text='<%# Eval("ID_Registo") %>' Style="display: none;" />

    <asp:Label ID="lblReferenciaCliente" runat="server" Text='<%# Eval("Ref_Cliente") %>' />

</td>

here is my code

this is my submit button

protected void btnValidarFormulario_Click(object sender, EventArgs e)

{

    if (Page.IsValid)

    {

        string cnnStr = ConfigurationManager.ConnectionStrings["ValidacaoFormas_ConnectionString"].ConnectionString;



        ADefinicao def = new ADefinicao();



        def.ReferenciaInterna = txtRefInterna.Text;

        def.Indice = txtIndice.Text;

        def.Observacoes = txtObservacoes.Text;

        def.isValid = "Sim";

        def.DataValidacao = DateTime.Now.ToString("dd-MM-yyyy").ToString();



        string nome = Session["Nome"].ToString();

        int id = Convert.ToInt32(ViewState["id"]);



        id = ADefinicao.UpdateADefinicao(nome, id, def);



        ScriptManager.RegisterStartupScript(this, this.GetType(), "key_name", "ShowToast('success','Documento validado com sucesso.'); setTimeout(function(){window.location.href ='/Conta/Início.aspx'}, 3000);", true);

    }

}

and this is the main repeater

<asp:Repeater ID="rptValidacao" runat="server" DataSourceID="SqlDataSource1" OnItemCommand="rptValidacao_ItemCommand">

    <HeaderTemplate>

        <table id="tblValidarRegistos" class="table table-bordered table-striped table-hover dataTable text-center">

        <thead class="thead-dark">

            <tr>

                <th class="text-center">Ref. Cliente</th>

                <th class="text-center">Ref. Interna</th>

                <th class="text-center">Índice</th>

                <th class="text-center">Qtd. Formas</th>

                <th class="text-center"></th>

            </tr>

        </thead>

    </HeaderTemplate>

    <ItemTemplate>

        <tr style="font-size:15px;">

            <td>

                <asp:Label ID="lblIdRegisto" runat="server" Text='<%# Eval("ID_Registo") %>' Style="display: none;" />

                <asp:Label ID="lblReferenciaCliente" runat="server" Text='<%# Eval("Ref_Cliente") %>' />

            </td>

            <td>

                <asp:Label ID="lblReferenciaInterna" runat="server" Text='<%# Eval("Ref_Interna") %>' />

            </td>

            <td>

                <asp:Label ID="lblIndicie" runat="server" Text='<%# Eval("Indice") %>' />

            </td>

            <td>

                <asp:Label ID="lblQTDFormas" runat="server" Text='<%# Eval("QTD_Formas") %>' />

            </td>

            <td>

                <asp:ImageButton ID="ibtnValidar" runat="server" ImageUrl="/Images/Icones/success.png" CommandName="Validar" CommandArgument='<%# Eval("ID_Registo") %>' Width="25" />                                    

            </td>

        </tr>

    </ItemTemplate>

    <FooterTemplate>

        </table>

    </FooterTemplate>

</asp:Repeater>

I was wondering if is there a way to pass an arguent from that repeater to this button

<asp:Button ID="btnValidarFormulario" CssClass="submit-button font-weight-bold" runat="server" Text="Validar Documentação" ValidationGroup="vgValidarDocumentacao"  OnClick="btnValidarFormulario_Click" />

EDIT.

This the the form that appears when img button clicked on repeater with some data and needs to be updated, it's a bit long so i only posted cause i was asked. The submit button is at the end. I only need the ID where all the data on the form comes from and pass it to the submit button

 <div id="divValidar" class="card card-danger shadow mx-auto custom-card-layout" visible="false" runat="server" style="min-width: 600px; max-width: 950px;">

    <div class="card-header text-center custom-card-header">

        <h3 class="card-title font-weight-bold">A - Definição</h3>

    </div>

    <!-- /.card-header -->



    <!-- form start -->

    <div class="card-body">



        <div class="container">



            <asp:ValidationSummary runat="server"

                ID="ValidationSummary2"

                DisplayMode="BulletList"

                HeaderText="<b>Preencha todos os campos devidamente para proseguir.</b>"

                ValidationGroup="vgADefinicao"

                CssClass="alert validation-summary"

                ShowSummary="true" />





            <fieldset>

                <legend>Informação Referêncial</legend>





                <div class="row justify-content-center">



                    <div class="col-sm-4">

                        <div class="form-group col-10 mx-auto text-center">

                            <asp:Label ID="lblRefCliente" Text="1. Referência Cliente" AssociatedControlID="txtRefCliente" runat="server"></asp:Label>

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <asp:TextBox ID="txtRefCliente" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>





                        </div>

                    </div>



                    <div class="col-sm-4">

                        <div class="form-group col-10 mx-auto">

                            <asp:Label ID="lblRefInterna" Text="2. Referência Interna" AssociatedControlID="txtRefInterna" runat="server"></asp:Label>

                            <asp:TextBox ID="txtRefInterna" CssClass="form-control form-control-sm border border-dark" runat="server" placeholder="Referência Interna"></asp:TextBox>

                        </div>

                    </div>





                    <div class="col-sm-4">

                        <div class="form-group col-10 mx-auto">

                            <asp:Label ID="lblIndice" Text="3. Índice" AssociatedControlID="txtIndice" runat="server"></asp:Label>

                            <asp:TextBox ID="txtIndice" CssClass="form-control form-control-sm border border-dark" runat="server" placeholder="Indíce"></asp:TextBox>

                        </div>

                    </div>

                </div>



            </fieldset>



            <fieldset>

                <legend>Casquilhos e Formas - Quantidade</legend>





                <div class="row justify-content-center pb-4">



                    <div class="col-md-6">

                    </div>



                    <div class="col-md-6 text-center">

                        <strong>5. Quantidade de Casquilhos</strong>

                    </div>

                </div>



                <div class="row justify-content-center row-eq-height">

                    <div class="col-md-6">





                        <div class="form-group col-7 mx-auto text-center">

                            <asp:Label ID="lblQtdFormas" Text="4. Quantidade de Formas" AssociatedControlID="txtQtdFormas" runat="server"></asp:Label>

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <asp:TextBox ID="txtQtdFormas" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>



                        </div>



                    </div>



                    <div class="col-md-6">





                        <div class="form-group col-7 mx-auto text-center">

                            <asp:Label ID="lblCasquilhosFixos" Text="5.1 Fixos" AssociatedControlID="txtCasquilhosFixos" runat="server"></asp:Label>

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <asp:TextBox ID="txtCasquilhosFixos" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>



                        </div>



                        <div class="form-group col-7 mx-auto text-center">

                            <asp:Label ID="lblCasquilhosLivres" Text="5.2 Livres" AssociatedControlID="txtCasquilhosLivres" runat="server"></asp:Label>

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <asp:TextBox ID="txtCasquilhosLivres" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>



                        </div>



                    </div>

                </div>

            </fieldset>





            <fieldset>

                <legend>Casquilhos e Formas - Diâmetros</legend>





                <div class="row justify-content-center pb-4">



                    <div class="col-md-6 text-center">

                        <strong>6. Diâmetro dos casquilhos</strong>

                    </div>



                    <div class="col-md-6 text-center">

                        <strong>7. Diâmetro das formas</strong>

                    </div>



                </div>





                <div class="row justify-content-center">

                    <div class="col-md-6">

                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblDiametroCasqLadoFixo" Text="6.1 Lado Fixo" AssociatedControlID="txtDiametroCasqLadoFixo" runat="server"></asp:Label>

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>



                            <div class="input-group input-group-sm">

                                <asp:TextBox ID="txtDiametroCasqLadoFixo" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>

                                <div class="input-group-append border border-dark">

                                    <span class="input-group-text"><strong>mm</strong></span>

                                </div>

                            </div>



                        </div>

                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblDiametroCasqLadoMovel" Text="7.2 Lado Móvel" AssociatedControlID="lblDiametroCasqLadoMovel" runat="server"></asp:Label>

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <div class="input-group input-group-sm">



                                <asp:TextBox ID="txtDiametroCasqLadoMovel" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>

                                <div class="input-group-append border border-dark">

                                    <span class="input-group-text"><strong>mm</strong></span>

                                </div>

                            </div>



                        </div>



                    </div>



                    <div class="col-md-6">



                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblDiametroFormasFixo" Text="7.1 Lado fixo" AssociatedControlID="txtDiametroFormasFixo" runat="server"></asp:Label>

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <div class="input-group input-group-sm">



                                <asp:TextBox ID="txtDiametroFormasFixo" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>

                                <div class="input-group-append border border-dark">

                                    <span class="input-group-text"><strong>mm</strong></span>

                                </div>

                            </div>





                        </div>



                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblDiametroFormasMovel" Text="7.2 Lado Móvel" AssociatedControlID="txtDiametroFormasMovel" runat="server"></asp:Label>

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <div class="input-group input-group-sm">

                                <asp:TextBox ID="txtDiametroFormasMovel" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>

                                <div class="input-group-append border border-dark">

                                    <span class="input-group-text"><strong>mm</strong></span>

                                </div>

                            </div>



                        </div>

                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblDiametroFormasCorpo" Text="7.2 Corpo" AssociatedControlID="txtDiametroFormasCorpo" runat="server"></asp:Label>

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <div class="input-group input-group-sm">



                                <asp:TextBox ID="txtDiametroFormasCorpo" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>

                                <div class="input-group-append border border-dark">

                                    <span class="input-group-text"><strong>mm</strong></span>

                                </div>

                            </div>



                        </div>

                    </div>

                </div>



            </fieldset>





            <fieldset>

                <legend>Cru

                    <small>(A preencher pela Extrusão)</small>

                </legend>



                <div class="row justify-content-center pb-4">



                    <div class="col-md-6 text-center">

                        <strong>8. Informação do Cru</strong>

                    </div>



                    <div class="col-md-6 text-center">

                        <strong>8.3 Parâmetros do cru:</strong>

                    </div>



                </div>



                <div class="row justify-content-center">



                    <div class="col-md-6">



                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblCruBase" Text="8.1 Base" AssociatedControlID="txtCruBase" runat="server"></asp:Label>

                            <asp:TextBox ID="txtCruBase" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>

                        </div>



                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblCruLinha" Text="8.2 Linha" AssociatedControlID="txtCruLinha" runat="server"></asp:Label>

                            <asp:TextBox ID="txtCruLinha" CssClass="form-control form-control-smborder border-dark" runat="server" ReadOnly="true"></asp:TextBox>

                        </div>



                        <div class="form-group col-10 mx-auto text-center">

                            <asp:Label ID="lblMarcacaoContinua" Text="8.4 Marcação contínua" AssociatedControlID="txtMarcacaoContinua" runat="server" />

                            <small class="text-muted">(texto + cor)</small>

                            <asp:TextBox ID="txtMarcacaoContinua" TextMode="MultiLine" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true" />

                        </div>



                    </div>



                    <div class="col-md-6">



                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblCruDiametro" Text="Diâmetro" AssociatedControlID="txtCruDiametro" runat="server"></asp:Label>

                            <div class="input-group input-group-sm">

                                <asp:TextBox ID="txtCruDiametro" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>

                                <div class="input-group-append border border-dark">

                                    <span class="input-group-text"><strong>mm</strong></span>

                                </div>

                            </div>

                        </div>



                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblCruEspessura" Text="Espessura" AssociatedControlID="txtCruEspessura" runat="server"></asp:Label>



                            <div class="input-group input-group-sm">

                                <asp:TextBox ID="txtCruEspessura" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>

                                <div class="input-group-append border border-dark">

                                    <span class="input-group-text"><strong>mm</strong></span>

                                </div>



                            </div>

                        </div>



                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblComprimento" Text="Comprimento" AssociatedControlID="txtComprimento" runat="server"></asp:Label>

                            <div class="input-group input-group-sm">

                                <asp:TextBox ID="txtComprimento" CssClass="form-control form-control-sm border border-dark" runat="server" ReadOnly="true"></asp:TextBox>

                                <div class="input-group-append border border-dark">

                                    <span class="input-group-text"><strong>mm</strong></span>

                                </div>

                            </div>

                        </div>

                    </div>

                </div>



            </fieldset>





            <fieldset>

                <legend>9. Datas Previstas</legend>



                <div class="row justify-content-center">



                    <div class="col-md-6">



                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblDataFormasPreSerie" runat="server" AssociatedControlID="txtReadOnlyDataFormasPreSerie" Text="9.1 Formas Pré-Série" />

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <div class="input-group input-group-sm">

                                <div class="input-group-prepend border border-dark">

                                    <span class="input-group-text"><i class="far fa-calendar-alt"></i></span>

                                </div>

                                <asp:TextBox ID="txtReadOnlyDataFormasPreSerie" runat="server" class="form-control form-control-sm border border-dark" ReadOnly="true" />

                            </div>



                        </div>



                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblDataFormasSerie" runat="server" AssociatedControlID="txtReadOnlyDataFormasSerie" Text="9.3 Formas Série" />

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <div class="input-group input-group-sm">

                                <div class="input-group-prepend border border-dark">

                                    <span class="input-group-text"><i class="far fa-calendar-alt"></i></span>

                                </div>

                                <asp:TextBox ID="txtReadOnlyDataFormasSerie" runat="server" class="form-control form-control-sm border border-dark" ReadOnly="true" />

                            </div>

                        </div>



                    </div>



                    <div class="col-md-6">





                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblDataAmostrasIniciais" runat="server" AssociatedControlID="txtReadOnlyDataAmostrasIniciais" Text="9.2 Amostras iniciais" />

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <div class="input-group input-group-sm">

                                <div class="input-group-prepend border border-dark">

                                    <span class="input-group-text"><i class="far fa-calendar-alt"></i></span>

                                </div>

                                <asp:TextBox ID="txtReadOnlyDataAmostrasIniciais" runat="server" class="form-control form-control-sm border border-dark" ReadOnly="true" />

                            </div>



                        </div>



                        <div class="form-group col-6 mx-auto text-center">

                            <asp:Label ID="lblDataArranqueProducao" runat="server" AssociatedControlID="txtReadOnlyDataArranqueProducao" Text="9.4 Arranque Produção" />

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <div class="input-group input-group-sm">

                                <div class="input-group-prepend border border-dark">

                                    <span class="input-group-text"><i class="far fa-calendar-alt"></i></span>

                                </div>

                                <asp:TextBox ID="txtReadOnlyDataArranqueProducao" runat="server" class="form-control form-control-sm border border-dark" ReadOnly="true" />

                            </div>



                        </div>

                    </div>

                </div>

            </fieldset>



            <fieldset>

                <legend>Documentos</legend>



                <div class="row justify-content-center">



                    <div class="col-md-12">







                        <asp:Repeater ID="rptAnexos" runat="Server" OnItemCommand="rptAnexos_ItemCommand">

                            <HeaderTemplate>

                                        <table id="tblAnexos" class="table-sm table table-striped table-bordered text-center rounded" style="border-radius: 10px;">

                                            <caption>Lista de Anexos</caption>

                                            <thead class="thead-dark">

                                                <tr>

                                                    <th>ID</th>

                                                    <th>Tipo Desenho</th>

                                                    <th>Nome Ficheiro</th>

                                                    <th>Inserido Por</th>

                                                    <th></th>

                                                </tr>

                                            </thead>

                            </HeaderTemplate>

                            <ItemTemplate>



                                <tr style="font-size:small">

                                    <td>

                                        <asp:Label ID="lblIdRegisto" runat="server" Text=' <%# Eval("ID_Registo") %>' />

                                    </td>

                                    <td>

                                        <asp:Label ID="lblTipoDesenho" runat="server" Text=' <%# Eval("Tipo") %>' />



                                    </td>

                                    <td>

                                        <asp:Label ID="lblNomeAnexo" runat="server" Text='<%# Eval("NomeAnexo") %>' />

                                    </td>

                                    <td>

                                        <asp:Label ID="lblPiloto" runat="server" Text='<%# Eval("Piloto") %>' />

                                    </td>

                                    <td class="text-center">

                                        <asp:ImageButton runat="server" ImageUrl="/Images/Icones/download.png" Width="20" CommandName="Download" CommandArgument='<%# Eval("ID") %>' />

                                    </td>

                                </tr>



                            </ItemTemplate>

                            <FooterTemplate>

                                </table>

                            </FooterTemplate>

                        </asp:Repeater>



                    </div>

                </div>



            </fieldset>



            <fieldset>

                <legend>Observações</legend>



                <div class="row justify-content-center row-eq-height">

                    <div class="col-md-12">





                        <div class="form-group col-7 mx-auto text-center">

                            <asp:Label ID="lblObservacoes" Text="Observações" AssociatedControlID="txtObservacoes" runat="server"></asp:Label>

                            <i class="fas fa-asterisk text-danger mb-2" style="font-size: 8px;"></i>

                            <asp:TextBox ID="txtObservacoes" CssClass="form-control form-control-sm border border-dark" runat="server" TextMode="MultiLine" Rows="3"></asp:TextBox>

                            <div class="valid-feedback">Success! You've done it.</div>

                            <i class="glyphicon glyphicon-ok form-control-feedback"></i>

                            <div class="valid-feedback feedback-icon">

                                <i class="fa fa-check"></i>

                            </div>

                            <div class="invalid-feedback feedback-icon">

                                <i class="fa fa-times"></i>

                            </div>



                            <asp:CustomValidator ID="cvObservacoes" runat="server" EnableClientScript="True" ValidationGroup="vgValidarDocumentacao" Display="Dynamic" ValidateEmptyText="True" ClientValidationFunction="CustomValidator" CssClass="server-validator" ControlToValidate="txtObservacoes"></asp:CustomValidator>

                            <asp:RequiredFieldValidator ID="rfvObservacoes" runat="server" CssClass="server-validator" ValidationGroup="vgValidarDocumentacao" SetFocusOnError="True" ControlToValidate="txtObservacoes" Text="Campo necessário." ErrorMessage="<b>Observações:</b> Campo necessário." Display="Dynamic"></asp:RequiredFieldValidator>





                        </div>



                    </div>

                </div>



            </fieldset>

        </div>

    </div>



    <!-- /.card-body -->

    <div class="card-footer custom-card-footer">

        <asp:Button ID="btnValidarFormulario" CssClass="submit-button font-weight-bold" runat="server" Text="Validar Documentação" ValidationGroup="vgValidarDocumentacao"  OnClick="btnValidarFormulario_Click" />

    </div>

    <!-- /.card-footer -->

</div>

You can place a Label in an ItemTemplate and set the Visibility to false.

<asp:Repeater ID="rptValidacao" runat="server">

    <ItemTemplate>

        <asp:Label ID="LabelID" runat="server" Text='<%# Eval("id") %>' Visible="false"></asp:Label>

    </ItemTemplate>

</asp:Repeater>

But the Label still exists with the correct value if you use FindCOntrol in the Button Click event

protected void btnValidarFormulario_Click(object sender, EventArgs e)

{

    Label lbl = rptValidacao.Items[i].FindControl("LabelID") as Label;

}

You should also look into DataKeys. But a Repeater cannot use them.

A solution is to create a HiddenField and on data bind of the repeater yourHiddenField.Value will be populated to something like:

3,4,7,12

and then on button click split the values in the hidden field. You can do this even on the client-side if the hidden field is populated via Javascript before submission is executed.