Question

我正在尝试构建一个示例Android应用程序，该应用程序检索此处提供的文件路径的文件信息代码

有2个.cs文件，我使用的是＆＃34; mainactivity.cs＆＃34;其代码如下所示

mainactivity.cs

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

namespace ACCESSTIME
{

[Activity (Label = "ACCESSTIME", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{
    //int count = 1;

    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);

        // Set our view from the "main" layout resource
        SetContentView (Resource.Layout.Main);

        // Get our button from the layout resource,
        // and attach an event to it
        EditText filepathText = FindViewById<EditText>(Resource.Id.FilePathText);
        Button getinfobutton = FindViewById<Button> (Resource.Id.GetInfoButton);

        string fileinfo = string.Empty; 

        getinfobutton.Click += (object sender, EventArgs e) =>
         {

            fileinfo = GetInfo.Main(filepathText.Text);
        };
     }
  }
}

，另一个文件是 getinfo.cs

using System;
using System.IO;
using System.Text;


public static class GetInfo
{
public static string Main (string text)
{

    // Full file name 
    //string fileName = @"";
    FileInfo fi = new FileInfo(fileName);

    // Get File Name
    string justFileName = fi.Name;
    Console.WriteLine("File Name: {0}", justFileName);
    // Get file name with full path 
    string fullFileName = fi.FullName;
    Console.WriteLine("File Name: {0}", fullFileName);
    // Get file extension 
    string extn = fi.Extension;
    Console.WriteLine("File Extension: {0}", extn);
    // Get directory name 
    string directoryName = fi.DirectoryName;
    Console.WriteLine("Directory Name: {0}", directoryName);
    // File Exists ?
    bool exists = fi.Exists;
    Console.WriteLine("File Exists: {0}", exists);
    if (fi.Exists)
    {
        // Get file size
        long size = fi.Length;
        Console.WriteLine("File Size in Bytes: {0}", size);
        // File ReadOnly ?
        bool IsReadOnly = fi.IsReadOnly;
        Console.WriteLine("Is ReadOnly: {0}", IsReadOnly);
        // Creation, last access, and last write time 
        DateTime creationTime = fi.CreationTime;
        Console.WriteLine("Creation time: {0}", creationTime);
        DateTime accessTime = fi.LastAccessTime;
        Console.WriteLine("Last access time: {0}", accessTime);
        DateTime updatedTime = fi.LastWriteTime;
        Console.WriteLine("Last write time: {0}", updatedTime);
        Console.ReadLine();
    }       }
}

如果我构建这个我得到错误为
＆＃34;名称＆＃39; fileName＆＃39;在当前上下文中不存在＆＃34;

请帮助我

Answer 1

您正在评论文件名：

//string fileName = @"";

其次，如果您想要命令行中的文件名，请使用：

public static string Main (string fileName)
{
  FileInfo fi = new FileInfo(fileName);

当前上下文中不存在名称“fileName”

1 个答案: