c# - 图像在新搜索中没有改变。 C#(asp.net 项目)

Question

这使用了 bing 的网络服务。我有一个图像按钮和一组图像按钮。每次单击它时，单个图像都会更改为数组中的下一个图像。问题是如果我单击它并进行新的搜索，图像按钮的数组不会改变。代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using bing_search.net.bing.api;
using System.Collections;




namespace bing_search
{

public partial class _Default : System.Web.UI.Page
{
    static ArrayList images = new ArrayList();
    static Image[] imagearry;
    static ImageButton[] imgButtnsArray;
    static int counter = 0;
    int fooBarCount = 0;
    int firstLoad = 0; 
    protected void Page_Load(object sender, EventArgs e)
    {


    }

    protected void DoItButton_Click(object sender, EventArgs e)
    {
        images.Clear();
        imagearry = null; 
        imgButtnsArray = null;

        BingService bs = new BingService(); 
        net.bing.api.SearchRequest req = new SearchRequest();
        req.AppId = "0B15AB60D625A10059A4A04B68615C5B0D904CA9";
        req.Query = SearchBox.Text;
        req.Sources = new SourceType[] { SourceType.Image};
        req.Market = "en-us";
        req.Adult = AdultOption.Off;
        req.Image = new ImageRequest();
        req.Image.CountSpecified = true;
        req.Image.Count = 50;

        SearchResponse resp = bs.Search(req);
        foreach (ImageResult result in resp.Image.Results)
        {
            Image im = new Image();
            im.ImageUrl = result.MediaUrl;
            im.Width = 200;
            im.Height = 200;
            images.Add(im);
            //this.Controls.Add(im);

        }
      //  Image lol = (Image)images[0];



        int size = images.Count; 
        imagearry = new Image[size];
        Type typ = typeof(Image);
        imagearry = (Image [])images.ToArray(typ); 
        ImageButton1.ImageUrl = imagearry[0].ImageUrl;
        int blaCount = 0;
        ArrayList imgButtns = new ArrayList(); 
        foreach (Image ii in images)
        {
            ImageButton imgb = new ImageButton();
            imgb.Width = 200;
            imgb.Height = 200;
            imgButtns.Add(imgb);    
        }
        size = imgButtns.Count;
        imgButtnsArray = (ImageButton[])imgButtns.ToArray(typeof(ImageButton));

        foreach (ImageButton iii in imgButtnsArray)
        {
            imgButtnsArray[fooBarCount].ImageUrl = imagearry[fooBarCount].ImageUrl;
            Panel1.Controls.Add(iii);
            fooBarCount++;

        }
        fooBarCount = 0;
        counter = 0;

    }


     protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        counter++;
        heightLable.Text = "clicked";
        Image tempImage = (Image)imagearry[counter];
        ImageButton1.ImageUrl = tempImage.ImageUrl;
        foreach (ImageButton iii in imgButtnsArray)
        {
            imgButtnsArray[fooBarCount].ImageUrl = imagearry[fooBarCount].ImageUrl;
            Panel1.Controls.Add(iii);
            fooBarCount++;

        }
        fooBarCount = 0;
        counter = 0;
    }
}
}

Answer 1

每次点击都会重置两个计数器，因此它总是从同一张图片开始。

fooBarCount = 0;
    counter = 0;

它们也不是静态的，所以它们在每次页面加载时都会重置为 0，并显示相同的图像并且不会改变。

如果另一方面是缓存问题，因为我不知道图像文件名是什么，也许这就是这里的问题，那么请尝试类似的方法。

imgButtnsArray[fooBarCount].ImageUrl = imagearry[fooBarCount].ImageUrl + "?rnd=" + RandomNumber.ToString();