private bool FileCompare(string file1, string file2) { int file1byte; int file2byte; FileStream fs1; FileStream fs2; // Determine if the same file was referenced two times. if (file1 == file2) { // Return true to indicate that the files are the same. return true; } // Open the two files. fs1 = new FileStream(file1, FileMode.Open); fs2 = new FileStream(file2, FileMode.Open); // Check the file sizes. If they are not the same, the files // are not the same. if (fs1.Length != fs2.Length) { // Close the file fs1.Close(); fs2.Close(); // Return false to indicate files are different return false; } // Read and compare a byte from each file until either a // non-matching set of bytes is found or until the end of // file1 is reached. do { // Read one byte from each file. file1byte = fs1.ReadByte(); file2byte = fs2.ReadByte(); } while ((file1byte == file2byte) && (file1byte != -1)); // Close the files. fs1.Close(); fs2.Close(); // Return the success of the comparison. "file1byte" is // equal to "file2byte" at this point only if the files are // the same. return ((file1byte - file2byte) == 0); } private void PdfCompare_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { if (FileCompare(this.textBox1.Text, this.textBox2.Text)) { MessageBox.Show("Files are equal."); } else { MessageBox.Show("Files are not equal."); } } }
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