I'm having a mistake that started to happen, I've been trying for a couple of days for a solution to it and so far without success.
I have a whole form made in webforms that when clicking the button to send the data the following error is generated.
<%@PageTitle="" Language="C#" MasterPageFile="~/MasterPage.Master" AutoEventWireup="true" CodeBehind="Delivery_automatic.aspx.cs" Inherits="UI.Delivery_automatic" EnableEventValidation="true" %>
<!doctype html>
<%--<html xmlns="http://www.w3.org/1999/xhtml">--%>
<%--ANGULAR JS--%>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DELIVERY_AUTOMATIC</title>
<%--Colocar esse script em um arquivo único --%>
<%--somente numeros--%>
<script type="text/javascript">
var specialKeys = new Array();
specialKeys.push(8); //Backspace
function IsNumeric(e) {
var keyCode = e.which ? e.which : e.keyCode
var ret = ((keyCode >= 48 && keyCode <= 57) || specialKeys.indexOf(keyCode) != -1);
document.getElementById("error").style.display = ret ? "none" : "inline";
return ret;
}
//usando datepicker no textbox
<%-- $(function () {
$("#<%= data.ClientID %>").datepicker();
});--%>
</script>
</head>
<body>
<div class="container">
<div style="text-align: center;">
<div class="well well-sm">
<asp:Label ID="TITULO" runat="server" Text="ENTREGA AUTOMÁTICA" Font-Bold="true" ForeColor="Red"></asp:Label>
</div>
</div>
</div>
<div class="col-md-1">
</div>
<div class="panel panel-primary col-md-3">
<form runat="server" visible="true">
<table class="table table-reflow">
<tbody>
<tr>
<th scope="row"></th>
<td>
<span class="label label-default">Cliente:</span>
<asp:DropDownList ID="DropLabs" runat="server" DataSourceID="DataLabs" DataTextField="LAB" DataValueField="COD_LAB" AppendDataBoundItems="True" Width="155px" AutoPostBack="true">
<asp:ListItem Value="0" Selected="True">---</asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="DataLabs" runat="server" ConnectionString="Data Source=S-CUPBR04;Initial Catalog=DMD_Portal;Persist Security Info=True;User ID=dmddeveloper;Password=dmddeveloper" ProviderName="System.Data.SqlClient" SelectCommand="SELECT [COD_LAB], [LAB] FROM [LABS]"></asp:SqlDataSource>
</td>
</tr>
<tr>
<th scope="row"></th>
<td>
<span class="label label-default">Código Cliente:</span>
<asp:TextBox ID="codcli" runat="server" Enabled="false" Width="150px"></asp:TextBox>
</td>
</tr>
<tr>
<th scope="row"></th>
<td>
<span class="label label-default">Nome entrega:</span>
<asp:DropDownList ID="DropJobname" runat="server" DataSourceID="DataEntrega" DataTextField="JOBNAME" DataValueField="JOBNAME" Width="120px">
</asp:DropDownList>
<asp:SqlDataSource ID="DataEntrega" runat="server" ConnectionString="<%$ ConnectionStrings:DMD_DEPLOYConnectionString %>" SelectCommand="SELECT JOBNAME FROM SysHive.dbo.AUTODOWN_JOBLIST"></asp:SqlDataSource>
</td>
</tr>
<tr>
<th scope="row"></th>
<td>
<span class="label label-default">Periodicidade:</span>
<asp:DropDownList ID="DropPeriodic" runat="server" Width="150px">
<asp:ListItem Value="D">Diário</asp:ListItem>
<asp:ListItem Value="W">Semanal </asp:ListItem>
<asp:ListItem Value="M">Mensal </asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<th scope="row"></th>
<td>
<span class="label label-default">Data:</span>
<input type="text" id="datepicker" name="inputdate" required=""/>
</td>
</tr>
<tr>
<th scope="row"></th>
<td>
<span class="label label-default">Email Cliente:</span>
<asp:TextBox ID="email" runat="server" Width="150px"></asp:TextBox>
</td>
</tr>
<tr>
<th scope="row"></th>
<td>
<span class="label label-default">Pasta Download:</span>
<asp:FileUpload ID="FileDown" runat="server" />
</td>
</tr>
<tr>
<th scope="row"></th>
<td>
<span class="label label-default">Pasta Destino:</span>
<asp:FileUpload ID="FileDesti" runat="server" />
</td>
</tr>
<tr>
<th scope="row"></th>
<td>
<a data-toggle="modal" href="#ModalConfirm" class="btn-primary btn-block">SOLICITAR ENTREGA</a>
</td>
</tr>
</tbody>
</table>
</form>
<div id="ModalConfirm" class="modal fade in">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
</div>
<div class="modal-body">
<p>Solicitar entrega automática?</p>
</div>
<div class="modal-footer">
<div class="btn-group">
<button class="btn-danger btn-xs" data-dismiss="modal"><span class="glyphicon glyphicon-remove"></span>Não</button>
<button type="submit" id="btn1" class="btn-primary btn-group-lg" onserverclick="btn_Delivery" runat="server"><span class="glyphicon glyphicon-check"></span>Sim</button>
</div>
</div>
</div>
</div>
</div>
<p></p>
<%--<a data-toggle="modal" href="#ModalConfirm" class="btn-primary btn-group-sm">SOLICITAR ENTREGA</a>--%>
</div>
<div class="col-md-5">
</div>
</body>
</html>
</asp:Content>
my codebehind only has changes in pageload
protected void Page_Load(object sender, EventArgs e)
{
//Obtendo cod cliente automatico
if (DropLabs.SelectedItem.Text.ToString() == "---")
{
codcli.Text = "";
}
else
{
codcli.Text = DropLabs.SelectedValue.ToString();//.Replace("0", "");
}
}