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Ich probiere die Liste in Auswahl mit jquery Ajax, aber ich brauche Hilfe!Fehler 500 auf VB NET JQUERY AJAX
diese Fehler
Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://localhost:20440/admin/cadastro.aspx/GetMarcas
mein Code
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta charset="utf-8" />
<title></title>
<link href="../assets/css/bootstrap.min.css" rel="stylesheet" />
<link href="../assets/css/font-awesome.min.css" rel="stylesheet" />
<link href="../assets/css/estilo.css" rel="stylesheet" />
<script src="../assets/js/jquery-1.9.1.min.js"></script>
<script src="../assets/js/bootstrap.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$.ajax({
type: "POST",
contentType: "application/json; charset=UTF-8",
url: "cadastro.aspx/GetMarcas",
data: "{}",
dataType: "json",
success: function (result) {
$('#marca').empty();
$('#marca').append("<option value='0'>--Select--</option>");
$.each(result.d, function (key, value) {
$("#marca").append($("<option></option>").val(value.Codigo).html(value.Descricao));
});
}
});
});
</script>
</head>
<body>
<nav class="navbar navbar-inverse navbar-static-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<div id="navbar" class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li><a href="index.aspx">DASHBOARD <i class="fa fa-bar-chart"></i></a></li>
<li><a href="cadastro.aspx">CADASTRO <i class="fa fa-plus-circle"></i></a></li>
<li><a href="listagem.aspx">ITEMS CADASTRADOS <i class="fa fa-eye"></i></a></li>
</ul>
</div>
</div>
</nav>
<div class="container">
<div class="col-md-12">
<form action="/" method="post">
<div class="col-md-4">
<label>Marca</label>
<select class="form-control" name="marca" id="marca" runat="server">
</select>
</div>
<div class="col-md-4">
<label>Modelo</label>
<select class="form-control" name="modelo" id="modelo" runat="server">
<option value="value">text</option>
</select>
</div>
<div class="col-md-4">
<label>Cor</label>
<select class="form-control" name="cor" id="cor" runat="server">
<option value="value">text</option>
</select>
</div>
<div class="col-md-4">
<label>Ano</label>
<input type="text" name="ano" id="ano" class="form-control" />
</div>
<div class="col-md-4">
<label>Placa</label>
<input type="text" name="placa" id="placa" class="form-control" />
</div>
</form>
</div>
</div>
Mein Controller
Imports System.Collections.Generic
Imports System.Configuration
Imports System.Data
Imports System.Data.SqlClient
Imports System.Web.Services
Partial Class admin_cadastro
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then marca() End
End Sub
Public Class Marca
Public Property Codigo() As Integer
Get
Return m_Codigo
End Get
Set(value As Integer)
m_Codigo = value
End Set
End Property
Private m_Codigo As Integer
Public Property Descricao() As String
Get
Return m_Descricao
End Get
Set(value As String)
m_Descricao = value
End Set
End Property
Private m_Descricao As String
End Class
<WebMethod>
Public Shared Function GetMarcas() As List(Of Marca)
Dim dt As New DataTable()
Dim objMarca As New List(Of Marca)()
Using con As New SqlConnection(ConfigurationManager.ConnectionStrings("conStr").ConnectionString)
Using cmd As New SqlCommand("exec sp_ListaMarcas", con)
con.Open()
Dim da As New SqlDataAdapter(cmd)
da.Fill(dt)
If dt.Rows.Count > 0 Then
For i As Integer = 0 To dt.Rows.Count - 1
objMarca.Add(New Marca() With {
.Codigo = Convert.ToInt32(dt.Rows(i)("Codigo")),
.Descricao = dt.Rows(i)("Descricao").ToString()
})
Next
End If
Return objMarca
End Using
End Using
End Function
End Class
I Methode Postbacks nicht mit, ich brauche Hilfe regar ding diesen Fehler, so dass die Option Daten aus der Datenbank auflisten.
Haben Sie weitere Informationen zu der Ausnahme, die auf der Serverseite auftritt? – PhilDulac