Question

The name and the description of each form should be different from each other and should be able to reflect on what's written on the database. As you can see, my code keeps reading the same details. What should I do?

我的模型

<?php

defined ('BASEPATH') OR exit ('No direct script access allowed');

class Agrivest_model extends CI_Model{ 

public function __construct(){
    parent:: __construct();
    $this->load->database();       
}
public function get_category_tb(){
  $this->db->from('category_tb');
  $this->db->limit(1);
   $query=$this->db->get();
   return $query->result();
}

我的控制器

defined ('BASEPATH') OR exit ('No direct script access allowed');
class Agrivest extends CI_Controller {
function __construct(){

parent::__construct();
 $this->load->helper('url');
 $this->load->model('agrivest_model'); }
 public function index(){
 $data['category_tb'] = $this->agrivest_model->get_category_tb();
 $this->load->view('landing_page', $data); }

我的观看

<?php foreach ($category_tb as $post){?>
<p class="category_description"><?php echo $post->category_description; ?> </p>

Answer 1

尝试

            OnCollectionChanged(New NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset))
        Else
            Dim preservIdx = diff.ToPreserve?.Select(Function(x) Items.IndexOf(x.Key))?.ToHashSet
            ReplaceOrCopy(Me, diff.ToReplaceByIndex, diff.ToPreserve)
            For Each idx In diff.GetIndexesToDelete
                If diff.PreserveOnDelete AndAlso preservIdx IsNot Nothing AndAlso preservIdx.Contains(idx) Then Continue For
                RemoveAt(idx)
            Next
            'don't use addrange - will cause a reset
            diff.ToAdd.ForEach(Sub(x) Add(x))
        End If
        _lastRefresh = Now
    End Sub


    Private Sub ReplaceOrCopy(targetCol As IList(Of Object), src As List(Of KeyValuePair(Of Integer, Object)), toPreserve As Dictionary(Of Object, Object))
        For Each pair In src
            Dim target = targetCol(pair.Key)
            'If the target object implements INPC, then we can safely update those properties
            'Otherwise, we have to replace, and return the replaced object to the caller to be handled somehow
            '(which is why this method returns a Dictionary(Of T,T) -- the key is the original object, and the value is the new object)
            If toPreserve IsNot Nothing AndAlso toPreserve.ContainsKey(target) Then
                If TypeOf target Is INotifyPropertyChanged Then
                    CopyObject(pair.Value, target, , , True)
                Else
                    toPreserve(target) = pair.Value
                    targetCol(pair.Key) = pair.Value
                End If
            Else
                targetCol(pair.Key) = pair.Value
            End If
        Next
    End Sub

    Dim _tokenSource As New CancellationTokenSource
    Private Function CancelToken() As CancellationToken
        _tokenSource.Cancel()
        _tokenSource = New CancellationTokenSource
        Return _tokenSource.Token
    End Function

    Sub New(Query As Func(Of IQueryable))
        Me.Query = Query
        Timer.Start()
    End Sub

    Sub FireTimer() 'for testing
        Timer_Tick(Nothing, Nothing)
    End Sub

    Private Sub Timer_Tick(sender As Object, e As EventArgs) Handles Timer.Tick
        If Control.GetType.Name = "ComboBox" Then
            Dim a = 1
        End If
        If _lastRequest IsNot Nothing AndAlso Now - _lastRequest < TimeSpan.FromSeconds(2) Then Exit Sub
        If Now - _lastRefresh.GetValueOrDefault < RefreshSpan Then Exit Sub
        If _queryTask?.Status.In(TaskStatus.Running, TaskStatus.WaitingForActivation) Then Exit Sub
        If GetLastInputTime() > 60 * 15 Then Exit Sub
        Dim sr = False
        sr = ShouldRefresh.Invoke
        If Control.GetType.Name = "TestPick" Then
            Dim a = 1
        End If
        If Not sr Then Exit Sub
        Refresh()
        RaiseEvent Refreshed(Me, Nothing)
    End Sub
End Class

不要忘记在您的网址中传递参数category_id

codeigniter：按ID从数据库中获取数据

1 个答案: