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   源码介绍

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批量提取txt 文件中的关键内容，并生成保存到txt文件中：一个关键字的值再多个文件中都存在，需要按照关键字提取所以的文件中的值，并按照关键字保存值。适合初学者学历遍历文件夹、文件、提取文件内容

 private void button1_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog fold = new FolderBrowserDialog();
            if (fold.ShowDialog() == DialogResult.OK)
            {
                getFile(fold.SelectedPath);
            }
            string[] band = new string[] { "RT_WCDMA_B01_PDET", "RT_WCDMA_B02_PDET", "RT_WCDMA_B05_PDET", "RT_WCDMA_B08_PDET" ,
                                            "RT_LTE_B03_PDET","RT_LTE_B05_PDET","RT_LTE_B07_PDET","RT_LTE_B34_PDET","RT_LTE_B39_PDET",
                                            "RT_LTE_B40_PDET","RT_LTE_B41_PDET","RT_CDMA_BC0_PDET","RT_WCDMA_B04_PDET","RT_LTE_B20_PDET",
                                            "RT_LTE_B28L_PDET","RT_LTE_B28H_PDET"};
            /*
            OpenFileDialog fileDialog = new OpenFileDialog();
            fileDialog.Multiselect = true;
            string fileName=null;
            string readLine = null;
            fileDialog.Title = "请选择文件";
            fileDialog.Filter = "所有文件(*.*)|*.*";
            if (fileDialog.ShowDialog() == DialogResult.OK)
            {
                fileName = fileDialog.FileName;
                textBox1.Text = fileName;
                MessageBox.Show("已选择文件:"   fileName, "选择文件提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            */
            foreach (string path in filePath)
            {
                foreach (string s in band)
                {
                    string readLine;
                    List<string> listValue = new List<string>();
                    StreamReader sr = new StreamReader(path.ToString(), Encoding.Default);
                    while ((readLine = sr.ReadLine()) != null)
                    {
                        Regex r = new Regex(s);
                        Match m = r.Match(readLine);
                        if (m.Success)
                        {
                            string[] splitString = readLine.Split(new string[] { s }, StringSplitOptions.RemoveEmptyEntries);
                            //*#bsn:7HB08A4011000437*#value:3499*#minThreshold:100*#maxThreshold:30000*#result:pass*#cycle:0*#errorCode:NA*#testTime:1970-01-01 03:44:19*#
                            string[] splitstring1 = splitString[1].Split('*');
                            string[] splitstring2 = splitstring1[2].Split(':');
                            string value = splitstring2[1];
                            //string PcbSN = splitString[1].Substring(6, 16);
                            listValue.Add(value);
                        }

                    }
                    string strSavefileName = s   ".txt";
                    StreamWriter sw = new StreamWriter(strSavefileName, true, Encoding.Default);
                    foreach (string ss in listValue)
                    {
                        sw.WriteLine(ss);
                    }
                    sr.Close();
                    sw.Close();
                }
            }
            
            MessageBox.Show("数据抓取完成，请在目录下查看txt 文件！");
            
        }