WINCE中选择目录组件（C#）

　　因为项目需要一个选择目录的功能，然.NET中在WINCE中folderBrowserDialog组件却不可用，在网上搜了2天都没找到此类可用资源，更搞的是有个资源说是通过导入Shell32.dll的API方式来调用，为引足足浪费半天时间也没找到WINCE平台上的Shell32.dll究竟在何处！不得已，只好自己写个，没想到2个多小时就搞定了，真搞不懂这么简单的资源网上也没有，难道是做嵌入式开的较少？看来自己的工作思路还是有点问题，碰到问题，首先想到google，这也是长年养成的依赖性。好了，废话不说了，简单讲讲思路如下：

　　参考界面如下：

　　整个组件分三部分：

　　1、选择目录的主界面：

　　　　需要一个TreeView组件，主要代码如下：

FrmSelectFolder_Load

 1 private void FrmSelectFolder_Load(object sender, EventArgs e)
 2         {
 3             string errstr = "";
 4             try
 5             {
 6                 tvPathList.Nodes.Clear();
 7 
 8                 string currentPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase);
 9                 string rootPath = Directory.GetDirectoryRoot(currentPath);
10 
11                 TreeNode rootNode = new TreeNode("我的设备");
12                 tvPathList.Nodes.Add(rootNode);
13 
14                 //写个递归目录中全部文件夹检索出来
15                 ScanFolder(rootNode, rootPath);
16 
17                 rootNode.Expand();
18             }
19             catch (System.Exception ex)
20             {
21                 errstr = "fail to FrmSelectFolder_Load【" + ex.Message + "】";
22                 MessageBox.Show(errstr);
23             }
24         }

ScanFolder

 1 private void ScanFolder(TreeNode node, string path)
 2             {
 3                 string errstr = "";
 4                 try
 5                 {
 6                     string[] pathList = Directory.GetDirectories(path);
 7 
 8                     foreach (string p in pathList)
 9                     {
10                         string strp = p.Replace(path, "");
11 
12                         if (strp.Substring(0, 1) == @"\")
13                         {
14                             strp = strp.Substring(1, strp.Length - 1);
15                         }
16                         TreeNode treeNode = new TreeNode(strp);
17                         treeNode.ImageIndex = SelectImageIndex(strp, false);
18                         node.Nodes.Add(treeNode);
19 
20                         ScanFolder(treeNode, p);
21                     }
22                 }
23                 catch (System.Exception ex)
24                 {
25                     errstr = "fail to ScanFolder【" + ex.Message + "】";
26                     MessageBox.Show(errstr);
27                 }
28             }

　　2、新建文件夹界面

　　　考虑到新建文件夹已存在的情况会自动加1.

btnNew_Click

 1 private void btnNew_Click(object sender, EventArgs e)
 2         {
 3             string errstr = "";
 4             try
 5             {
 6                 TreeNode node = tvPathList.SelectedNode;
 7                 if (node == null)
 8                 {
 9                     MessageBox.Show("未选择目录");
10                     return;
11                 }
12 
13                 FrmNewFolder fnf = new FrmNewFolder();
14                 fnf.Location = new Point((Screen.PrimaryScreen.Bounds.Width - fnf.Width) / 2, (Screen.PrimaryScreen.Bounds.Height - fnf.Height) / 2);
15                 if (fnf.ShowDialog() == DialogResult.Cancel) { return; }
16 
17                 string folderName = fnf.m_folderName;
18 
19                 //计算当前目录的绝对路径
20                 string currentPath = "";
21                 TreeNode currentNode = node;
22                 while (currentNode.Parent != null)
23                 {
24                     currentPath = currentNode.Text + @"\" + currentPath;
25                     currentNode = currentNode.Parent;
26                 }
27 
28                 string newCurrentPath =  @"\" + currentPath + folderName + @"\";
29 
30                 if (Directory.Exists(newCurrentPath))
31                 {
32                     if (folderName != "新建文件夹")
33                     {
34                         MessageBox.Show("文件夹【" + folderName + "】已存在!");
35                         return;
36                     }
37                     else
38                     {
39                         //自动增加一个不存在的文件夹目录
40                         int index = 1;
41                         string newFolderName = String.Format("{0}{1}", folderName, index);
42                         while (Directory.Exists(@"\" + currentPath + newFolderName + @"\"))
43                         {
44                             index++;
45                             newFolderName = String.Format("{0}{1}", folderName, index);
46                         }
47                         folderName = newFolderName;
48                         newCurrentPath = @"\" + currentPath + folderName + @"\"; 
49                     }
50                 }
51 
52                 DirectoryInfo di = Directory.CreateDirectory(newCurrentPath);
53                 
54                 TreeNode treeNode = new TreeNode(folderName);
55                 treeNode.ImageIndex = SelectImageIndex(folderName, false);
56                 node.Nodes.Insert(0, treeNode);
57             }
58             catch (System.Exception ex)
59             {
60                 errstr = "fail to btnNew_Click【" + ex.Message + "】";
61                 MessageBox.Show(errstr);
62             }
63         }

　　3、调用此选择目录的主界面方法

Execute

 1 public bool Execute(ref string errstr)
 2         {
 3             bool bRet = false;
 4             try
 5             {
 6                 FrmSelectFolder fsf = new FrmSelectFolder();
 7                 fsf.Location = new Point((Screen.PrimaryScreen.Bounds.Width - fsf.Width) / 2, (Screen.PrimaryScreen.Bounds.Height - fsf.Height) / 2);
 8                 if (fsf.ShowDialog() == DialogResult.OK)
 9                 {
10                     FolderName = fsf.m_selectFoldeName;
11                     bRet = true;
12                 }
13                 else
14                 {
15                     errstr = "取消选择";
16                 }
17                 return bRet;
18             }
19             catch (System.Exception ex)
20             {
21                 errstr = "fail to Execute【" + ex.Message + "】";
22                 return bRet;
23             }
24         }

或

Execute

 1 public bool Execute(Control value, ref string errstr)
 2         {
 3             bool bRet = false;
 4             try
 5             {
 6                 FrmSelectFolder fsf = new FrmSelectFolder();
 7                 fsf.Location = new Point((value.Width - fsf.Width) / 2, (value.Height - fsf.Height) / 2);
 8                 if (fsf.ShowDialog() == DialogResult.OK)
 9                 {
10                     FolderName = fsf.m_selectFoldeName;
11                     bRet = true;
12                 }
13                 else
14                 {
15                     errstr = "取消选择";
16                 }
17                 return bRet;
18             }
19             catch (System.Exception ex)
20             {
21                 errstr = "fail to Execute【" + ex.Message + "】";
22                 return bRet;
23             }
24         }

最后写个DEMO调用：

View Code

1 private void button3_Click(object sender, EventArgs e)
2         {
3             SelectFolder.SelectFolder sf = new SelectFolder.SelectFolder();
4             if (sf.Execute(this))
5             {
6                 MessageBox.Show(sf.FolderName);
7             }
8         }

效果如下：

完整代码下载：

http://download.csdn.net/detail/laststep/4528434

注：类似Dialg的组件是怎么做的，没搞明白，因此组件对象化效果不好，不能在运行模式下隐藏，哪位知道怎么做的，交流下，谢谢！