c＃中的TreeView控件逻辑问题 [英] TreeView Control logic issue in c#

问题描述

大家好，



如果我选择一个以Tree结构化格式显示所有子文件夹的文件夹。但是，这里我有一个条件，即如果我选择一个文件夹，它应该显示所有子文件夹，其名称以树结构格式的_（下划线）开头。如果任何文件夹名称没有以_（下划线）启动，那么该文件夹不应该显示在树结构中。



我写了如下代码：

Hello all,

If i select one folder that displays all the sub-folders in Tree structured format. But, here i have one condition i.e If i select one folder that should display all the sub-folders which is having the name started with "_"(underscrore) in Tree structure format. If any folder name is not started with "_" (underscrore) that folder should not displayed in the Tree structure.

I have written the code like below:

            using System;
            using System.Collections.Generic;
            using System.ComponentModel;
            using System.Data;
            using System.Drawing;
            using System.Linq;
            using System.Text;
            using System.Threading.Tasks;
            using System.Windows.Forms;
            using System.IO;
            namespace tree_browse
            {
            public partial class Form1 : Form
            {
                 string strSearchPath = string.Empty;
                 public Form1()
                 {
                     InitializeComponent();
                 }
                 private void button1_Click(object sender, EventArgs e)
                 {
                       FolderBrowserDialog folderBrowserDialog = new FolderBrowserDialog();
                       folderBrowserDialog.SelectedPath = strSearchPath;
                       if (folderBrowserDialog.ShowDialog() == DialogResult.OK)
                       {
                           Properties.Settings.Default.Save();
                           strSearchPath = folderBrowserDialog.SelectedPath;
                           GetTree(strSearchPath);
                       }
                 }
                 void GetTree(string strSearchPath)
                 {
                      treeView1.Nodes.Clear();
                      SetNode(treeView1, strSearchPath);
                      treeView1.TopNode.Expand();
                  }
                 void SetNode(TreeView treeName, string path)
                  {
                       DirectoryInfo dirInfo = new DirectoryInfo(path);
                       TreeNode node = new TreeNode(dirInfo.Name);
                       node.Tag = dirInfo;
                       GetFolders(dirInfo, node);
                       GetFiles(dirInfo, node);
                        treeName.Nodes.Add(node);
                  }
                  void GetFolders(DirectoryInfo d, TreeNode node)
                  {
                     try
                       {
                          DirectoryInfo[] dInfo = d.GetDirectories();
                          if (dInfo.Length > 0)
                          {
                               TreeNode treeNode = new TreeNode();
                               foreach (DirectoryInfo driSub in dInfo)
                               {
                                   treeNode = node.Nodes.Add(driSub.Name, driSub.Name, 0, 0);
                                   GetFiles(driSub, treeNode);
                                   GetFolders(driSub, treeNode);
                               }
                           }
                       }
                      catch (Exception ex) { }
                  }
                void GetFiles(DirectoryInfo d, TreeNode node)
                {
                    //if you want to search .doc or docx file then:
                    // var files = d.GetFiles("*.doc*");
                    var files = d.GetFiles("*.*");
                    FileInfo[] subfileInfo = files.ToArray<FileInfo>();
                    if (subfileInfo.Length > 0)
                    {
                         for (int j = 0; j < subfileInfo.Length; j++)
                         {
                         //Checking for Hiddend files
                         bool isHidden = ((File.GetAttributes(subfileInfo[j].FullName) &      FileAttributes.Hidden) == FileAttributes.Hidden);
                              if (!isHidden)
                              {
                                   TreeNode treeNode = new TreeNode();
                                   string path = subfileInfo[j].FullName;
                                   string name = subfileInfo[j].Name;
                                   treeNode = node.Nodes.Add(path, name);
                               }
                          }
                    }
            }
      }
}

请更正此代码。帮帮我....



先谢谢

Please correct this code. Help me....

Thanks in Advance

推荐答案

问题通过使用一些基本解决实用逻辑。首先，从文件系统中获取所有文件/目录名称;除了匹配某些掩码的文件外，无法创建文件掩码来添加所有文件。所以，全部拿走它们。



然后，将注意力集中在向树中添加新节点的位置。在单独的方法中推广（抽象出）这段代码是最好的。我们假设你这样做了。显然，您将始终将传递给此函数的文件系统对象的名称作为字符串参数。检查此字符串是否为_ *（使用 string.StartsWith ），并且它匹配，立即从此函数返回。是的，就这么简单。



另外，不要硬编码这个'_'（而不是其他立即常量，特别是字符串，甚至不是;除了，比方说，0,1和null）。此字符应成为算法的参数。

-SA

The problem is solved by using some elementary practical logic. First of all, take all the file/directory names from the file system; it's not possible to create a file mask to add all file except the files matching some mask. So, take them all.

Then, concentrate your attention on the point where you add a new node to the tree. It would be the best to promote (abstract out) this piece of code in a separate method. Let's assume you do it. Apparently, you will always have a name of the file system object passed to this function as a string argument. Check this string for being "_*" (use string.StartsWith) and, it it matched, return from this function immediately. Yes, as simple as that.

Also, don't hard-code this '_' (and no other immediate constants, especially strings, not even ""; except, say, 0, 1 and null). This character should became a parameter of your algorithm.

—SA

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