如何在文件名中搜索符号？

问题描述：

亲爱的专家，

问题：批量上传文件后，我需要按名称识别和排序文件（通过掩码或标记）。例如，文件名Tripolskoe_23_2341_MD_123-XXX.PDF。我的实用程序应识别文件名，并根据MD标志确定此文件。应该提供什么样的搜索条件？在我的情况下我可以用什么代码？

问候，

Darya

我有什么试过：

Dear Experts,
Problem: after the batch uploading files I need to recognizing and sorting files by names (by mask or flag). For example, file name "Tripolskoe_23_2341_MD_123-XXX.PDF". My utility should recognize the file name and determine this file per flag "MD". What condition for search should be put? What code I can use in my case?
Regards,
Darya

What I have tried:

private void DropSpot_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
		{
			// We only want to accept files, so we only set our DragDropEffects 
			// if that's what's being dragged in
			if (e.Data.GetDataPresent(DataFormats.FileDrop, false)==true)
			{
				e.Effect = DragDropEffects.All;				
			}
		}
		ArrayList Files = new ArrayList();
		private void DropSpot_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
		{
			// Get a list of all objects in the Drop Data, that are files
            
			string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
			// Iterate through the dropped files
			for (int i=0;i<files.Length;i++)
			{
				// Add the to our ArrayList
				Files.Add(files[i]);
				// Create our new List View item
				ListViewItem item = new ListViewItem();
				// Get a file info object
				// we use this for getting file size, etc.
				System.IO.FileInfo fInfo = new System.IO.FileInfo(files[i]);								
				item.Text = System.IO.Path.GetFileName(fInfo.Name);
				item.SubItems.Add(fInfo.Length.ToString());
				item.SubItems.Add("Pending");								
				FileListView.Items.Add(item);
				FileListView.Tag = Files[Files.Count-1];
			}
			// Refresh the file list - for good measure
			this.Refresh();
			// If we added files, clear the instruction label
			
		}

答

这将取决于文件名的组织方式。如果它们总是采用相同的格式：

It's going to depend on how your file names are organised. If they are always in the same format:

aaa_dd_dddd_BitYouWant_ddd-aaaa.extension

那么最简单的方法就是使用Split：

Then the simplest way is just to use Split:

string[] parts = filename.Split('_');
if (parts.Length == 5)
   {
   string bitYouWant = parts[3];
   ...
   }

如何在文件名中搜索符号？

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