这很奇怪，但是当我执行查询“SELECT * FORM table”时它只返回第一行，但是当我执行“SELECT * FORM table WHERE id = 2”时，我确实得到了第二行。有人可以帮我这个吗？
这是我的代码： DB类，
using Microsoft.Bot.Builder.Dialogs;
using System;
using System.Threading.Tasks;
using Microsoft.Bot.Connector;
using Microsoft.Bot.Builder.FormFlow;
using System.Collections.Generic;
using System.Collections.Concurrent;
using Microsoft.Bot.Builder.ConnectorEx;
using Newtonsoft.Json;
namespace CardsBot
{
[Serializable]
public class SendToUserDialog : IDialog<object>
{
static ConcurrentDictionary<string, ConversationReference> _cachedConversationReferences = new ConcurrentDictionary<string, ConversationReference>();
private const string HelpString = "Enter 'Send Card' to send a card to another user. 'Send Message' to send a json message to another user. Or 'List Users' to see who is ready to receive messages.";
public async Task StartAsync(IDialogContext context)
{
context.Wait(this.MessageReceivedAsync);
}
public async Task MessageReceivedAsync(IDialogContext context, IAwaitable<IMessageActivity> argument)
{
var message = await argument;
string upperText = message.Text.Replace(" ", "").ToUpper();
if (upperText == "SENDCARD")
{
IFormDialog<SendCardForm> form = new FormDialog<SendCardForm>(new SendCardForm(), SendCardForm.BuildForm, FormOptions.PromptInStart);
context.Call(form, AfterSendCardComplete);
}
else if (upperText == "SENDMESSAGE")
{
IFormDialog<SendMessageForm> form = new FormDialog<SendMessageForm>(new SendMessageForm(), SendMessageForm.BuildForm, FormOptions.PromptInStart);
context.Call(form, AfterSendMessageFormComplete);
}
else if (upperText == "LISTUSERS")
{
var names = String.Join(", ", _cachedConversationReferences.Keys);
await context.PostAsync($"Users : {names}");
}
else
{
if (!context.UserData.ContainsKey("name"))
{
var getNamePrompt = new PromptDialog.PromptString("What is your name?", "Please enter your name.", 3);
context.Call(getNamePrompt, AfterNamePrompt);
}
else
{
await context.PostAsync($"You said: {message.Text} ({HelpString})");
context.Wait(MessageReceivedAsync);
}
}
}
private async Task AfterSendMessageFormComplete(IDialogContext context, IAwaitable<SendMessageForm> result)
{
var sendMessageForm = await result;
if (string.IsNullOrEmpty(sendMessageForm.RecipientName))
{
await context.PostAsync("A recipient name was not provided. Cannot send the message to nobody.");
}
else
{
ConversationReference conversation = null;
if (_cachedConversationReferences.TryGetValue(sendMessageForm.RecipientName, out conversation))
{
var originalReply = conversation.GetPostToBotMessage().CreateReply();
var replyMessage = GetMessage(originalReply, sendMessageForm.MessageJson);
var connector = new ConnectorClient(new Uri(originalReply.ServiceUrl));
await connector.Conversations.ReplyToActivityAsync(replyMessage);
await context.PostAsync($"Message was sent to {sendMessageForm.RecipientName} on {replyMessage.ChannelId} channel.");
}
else
{
await context.PostAsync($"No recipient found matching the name {sendMessageForm.RecipientName}");
}
}
}
private async Task AfterNamePrompt(IDialogContext context, IAwaitable<string> result)
{
var name = await result;
context.UserData.SetValue("name", name);
await context.PostAsync($"Thanks. What would you like to do now {name}? {HelpString}");
var conversationReference = context.Activity.ToConversationReference();
_cachedConversationReferences.AddOrUpdate(name, conversationReference, (oldVal, newVal) => conversationReference);
}
public Activity GetMessage(Activity originalReply, string messageJson)
{
var reply = JsonConvert.DeserializeObject<Activity>(messageJson);
reply.ChannelId = originalReply.ChannelId;
reply.Timestamp = originalReply.Timestamp;
reply.From = originalReply.From;
reply.Conversation = originalReply.Conversation;
reply.Recipient = originalReply.Recipient;
reply.Id = originalReply.Id;
reply.ReplyToId = originalReply.ReplyToId;
reply.ServiceUrl = originalReply.ServiceUrl;
return reply;
}
private async Task AfterSendCardComplete(IDialogContext context, IAwaitable<SendCardForm> result)
{
var SendCardForm = await result;
if (string.IsNullOrEmpty(SendCardForm.RecipientName))
{
await context.PostAsync("A recipient name was not provided. Cannot send a card to nobody.");
}
else
{
ConversationReference conversation = null;
if (_cachedConversationReferences.TryGetValue(SendCardForm.RecipientName, out conversation))
{
var reply = conversation.GetPostToBotMessage().CreateReply();
reply.Attachments.Add(GetCard(SendCardForm.Text, SendCardForm.Buttons.Value));
var connector = new ConnectorClient(new Uri(reply.ServiceUrl));
await connector.Conversations.ReplyToActivityAsync(reply);
}
else
{
await context.PostAsync($"No recipient found matching the name {SendCardForm.RecipientName}");
}
}
}
public Attachment GetCard(string text, int numberOfButtons)
{
var card = new HeroCard(text);
card.Buttons = new List<CardAction>(GetCardActions(numberOfButtons));
return card.ToAttachment();
}
private IEnumerable<CardAction> GetCardActions(int numberOfButtons)
{
for (int counter = 1; counter < numberOfButtons; counter++)
{
yield return new CardAction()
{
Title = $"button{counter}",
Type = ActionTypes.ImBack,
Value = $"button{counter}"
};
}
}
}
[Serializable]
public class SendMessageForm
{
[Prompt("Who would you like to send this message to (enter the name of the recipient)?")]
public string RecipientName { get; set; }
[Prompt("Paste in the .json of the message you would like to Send.")]
public string MessageJson { get; set; }
public static IForm<SendMessageForm> BuildForm()
{
return new FormBuilder<SendMessageForm>()
.AddRemainingFields()
.Confirm("Is this information correct?{*}")
.Build();
}
}
[Serializable]
public class SendCardForm
{
[Prompt("What would you like for the card text?")]
public string Text { get; set; }
[Prompt("How many buttons?")]
public int? Buttons { get; set; }
[Prompt("Who would you like to send the card to?")]
public string RecipientName { get; set; }
public static IForm<SendCardForm> BuildForm()
{
return new FormBuilder<SendCardForm>()
.AddRemainingFields()
.Confirm("Is this information correct?{*}")
.Build();
}
}
}
的index.php，
OnMenuItemSelected在我看来，这是一件奇怪的事情。 $ result1应该返回所有行，对吗？我希望它与DB类的查询方法中的 - ＆gt; fetch_object有关。我在那里搜索了这个问题，但我找不到它，因此php.net的fetch_object方法可以返回多行。有人有任何想法，他可以帮助我吗？
UPDATE：当我要求计数时，它会返回数据库中正确的行数，但stil它不会出现在$ _result属性中
答案 0 :(得分：1)
您只需拨打fetch_object一次。
mysqli_fetch_object（）将当前行结果集作为对象返回，其中对象的属性表示结果集中找到的字段的名称。
根据文件......
while ($obj = $result->fetch_object()) { printf ("%s (%s)\n", $obj->Name, $obj->CountryCode); }
...你需要在循环中调用它，直到没有更多的对象可以获取。