c# - System.Array' 不包含 'Count' 的定义

Question

在我的 C# 项目中，我收到此错误，即计数的定义不包含 System.Array

protected void Page_Prerender(object sender, EventArgs e)
{
    FileInfo[] fileInfo;
    string UpFolder = Server.MapPath("~/data/images/");
    DirectoryInfo dir = new DirectoryInfo(UpFolder);
    fileInfo = dir.GetFiles();
    // here i am getting error
    int TotalImages = fileInfo.Count();
    for (int count = 0; count < TotalImages; count++)
    {
        Image image = new Image();
        image.ImageUrl = "~/data/images/" + fileInfo[count].ToString();
        image.ID = count.ToString();
        DataListImage.Controls.Add(image);
    }
    DataListImage.DataSource = dir.GetFiles();
    DataListImage.DataBind();

    string UpFolder1 = Server.MapPath("~/data/thumbnails/");
    DirectoryInfo dir1 = new DirectoryInfo(UpFolder1);
    DataListthumbnails.DataSource = dir1.GetFiles();
    DataListthumbnails.DataBind();
}

Answer 1

您不需要 Count，而是可以将 Length 与数组一起使用来获取计数。

您收到错误是因为您缺少 using System.Linq;

要获取 TotalImages，您可以使用

int TotalImages = fileInfo.Length;