比较两个文件目录中的文件是否相同代码,Asp.Net代码库,德仔网

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【Asp.Net】比较两个文件目录中的文件是否相同
作者:dezai / 发布于2014/5/22/ 472
比较两个文件目录中的文件是否相同

	private void button1_Click(object sender, EventArgs e)
	 {
	 string strInfo = string.Empty;
	 string emptyFile = string.Empty;
	 richTextBox1.Text = "";
	 richTextBox2.Text = "";
	 if (string.IsNullOrEmpty(txtFile1.Text.Trim()) || string.IsNullOrEmpty(txtFile2.Text.Trim()))
	 {
	 MessageBox.Show("文件夹路径不能为空。");
	 }
	 else
	 {
	 CompareDirs(txtFile1.Text.Trim(), txtFile2.Text.Trim(), out strInfo,out emptyFile);
	 if (!string.IsNullOrEmpty(strInfo))
	 {
	 richTextBox1.Text = "不相同的文件有：\n" + strInfo + "\n\n\n.";
	 }
	 else
	 {
	 if (!string.IsNullOrEmpty(emptyFile))
	 {
	 richTextBox2.Text = "文件：&ldquo;" + emptyFile + "&rdquo;在文件夹&ldquo;" + txtFile2.Text + "&rdquo;中不存在";
	 }
	 else
	 {
	 MessageBox.Show("两文件夹内容完全相同。");
	 }
	 }
	 }
	 }
	 ///
	 /// 比较两个文件内容是否完全相同
	 ///
	 /// file1的绝对路径
	 /// file2的绝对路径
	 ///
	 private bool CompareFile(string file1, string file2)
	 {
	 if (file1.Equals(file2))
	 {
	 return true;
	 }
	 int file1Byte = 0;
	 int file2Byte = 0;
	 try
	 {
	 using (FileStream fs1 = new FileStream(file1, FileMode.Open),
	 fs2 = new FileStream(file2, FileMode.Open))
	 {
	 if (fs1.Length != fs2.Length)
	 {
	 return false;
	 }
	 do
	 {
	 file1Byte = fs1.ReadByte();
	 file2Byte = fs2.ReadByte();
	 } while ((file1Byte == file2Byte) && (file1Byte != -1));
	 }
	 return (file1Byte - file2Byte == 0);
	 }
	 catch
	 {
	 return false;
	 }
	 }
	 ///
	 /// 比较两个目录中的文件是否相同，
	 ///
	 ///
	 ///
	 /// 不相同的文件名存放到strInfo中
	 /// path1中的文件在path2中不存在时文件名保存到emptyFile中
	 private void CompareDirs(string path1, string path2, out string strInfo, out string emptyFile)
	 {
	 emptyFile = string.Empty;
	 strInfo = string.Empty;
	 bool tag = false;
	 try
	 {
	 DirectoryInfo dir1 = new DirectoryInfo(path1);
	 DirectoryInfo dir2 = new DirectoryInfo(path2);
	 FileInfo[] fileInfo1 = dir1.GetFiles();
	 FileInfo[] fileInfo2 = dir2.GetFiles();
	 foreach (FileInfo file1 in fileInfo1)
	 {
	 foreach (FileInfo file2 in fileInfo2)
	 {
	 if (file1.Name.Equals(file2.Name,StringComparison.OrdinalIgnoreCase))
	 {
	 tag = true;
	 if (!CompareFile(file1.FullName, file2.FullName))
	 strInfo += file1.Name + "\n";
	 break;
	 }
	 }
	 if (!tag)
	 {
	 emptyFile += file1.Name + "\n";
	 }
	 tag = false;
	 }
	
	 }
	 catch
	 { }
	 }

	 private void button2_Click(object sender, EventArgs e)
	 {
	 if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
	 {
	 txtFile1.Text = folderBrowserDialog1.SelectedPath;
	 }
	 }

	 private void button3_Click(object sender, EventArgs e)
	 {
	 if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
	 {
	 txtFile2.Text = folderBrowserDialog1.SelectedPath;
	 }
	 }

	 private void txtFile1_DragDrop(object sender, DragEventArgs e)
	 {
	 txtFile1.Text = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();
	 }

	 private void txtFile2_DragDrop(object sender, DragEventArgs e)
	 {
	 txtFile2.Text = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();
	 }

	 private void txtFile1_DragEnter(object sender, DragEventArgs e)
	 {
	 if (e.Data.GetDataPresent(DataFormats.FileDrop))
	 e.Effect = DragDropEffects.Link;
	 else e.Effect = DragDropEffects.None;
	 }

	 private void txtFile2_DragEnter(object sender, DragEventArgs e)
	 {
	 if (e.Data.GetDataPresent(DataFormats.FileDrop))
	 e.Effect = DragDropEffects.Link;
	 else e.Effect = DragDropEffects.None;
	 }

	 private void Form1_Load(object sender, EventArgs e)
	 {
	 txtFile1.AllowDrop = true;
	 txtFile2.AllowDrop = true;
	 richTextBox1.ReadOnly = true;
	 }
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