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我想要做的是打开多个文件并从每个文件中读取文本并检查某些关键字并将它们全部打印到一个新文件中,一旦完成,将使用所有关键字创建一个新文件。我已经在使用 foreach 来遍历所有文件名,并且我知道如何打开多个文件,但是在同时打印的同时检索内容并检查某些条件呢?

下面只是我到目前为止的一个例子,非常标准的东西。

多谢你们!

  if (dr == System.Windows.Forms.DialogResult.OK)
        {
            // Read the files
            foreach (String file in openFileDialog1.FileNames)
            {

                try
                {

                    listView1.Items.Add(file);

                }
                catch (SecurityException ex)
                {
                    // The user lacks appropriate permissions to read files, discover paths, etc.
                    MessageBox.Show("Security error. Please contact your administrator for details.\n\n" +
                        "Error message: " + ex.Message + "\n\n" +
                        "Details (send to Support):\n\n" + ex.StackTrace
                    );
                }
                catch (Exception ex)
                {
                    // Could not load the image - probably related to Windows file system permissions.
                    MessageBox.Show("Cannot display the image: " + file.Substring(file.LastIndexOf('\\'))
                        + ". You may not have permission to read the file, or " +
                        "it may be corrupt.\n\nReported error: " + ex.Message);
                }

            }

        }
4

3 回答 3

1

要读取文件,请使用System.IO.File.ReadAllText(). 这会将所有内容放入一个字符串变量中。

于 2012-06-20T13:59:16.663 回答
0

您可以像 SoMoS 建议的那样使用System.IO.File.ReadAllText()读取文件。以最有效的方式搜索字符串并使用StreamWriter写回数据

于 2012-06-20T14:11:54.717 回答
0
Try
            Using sr As New StreamReader("TestFile.txt")
                Dim line As String
                Do
                    line = sr.ReadLine()
                    If Not (line Is Nothing) Then
                       Console.WriteLine(line)
                    End If
                Loop Until line Is Nothing
            End Using
        Catch e As Exception
            Console.WriteLine("The file could not be read:")
            Console.WriteLine(e.Message)
        End Try

;)

于 2012-06-20T14:32:45.167 回答