c# 文件筛选
作者：互联网
调用方法：
FSearch _FSearch = new FSearch();
List<string> o_Rtn = new List<string>();
string _foldPath = textBox1.Text;
string _searckkey = textBox2.Text;
string foldPath = _foldPath;
if (string.IsNullOrEmpty(foldPath))
{
MessageBox.Show("请选择文件路径！");
return;
}
string searckkey = _searckkey;
if (string.IsNullOrEmpty(searckkey))
{
MessageBox.Show("请输入搜索关键字！");
return;
}
_FSearch.SelectFile(foldPath, searckkey, ref o_Rtn);
string Msg= string.Format("查询到符合条件的文档份数：{0}", o_Rtn.Count);
代码
/// <summary>
/// 文件内容检索
/// </summary>
public class FSearch
{
/// <summary>
/// 文件路径
/// </summary>
string _foldPath = string.Empty;
/// <summary>
/// 检索关键字
/// </summary>
string _searckkey = string.Empty;
string _lbmessage = string.Empty;
string _comboBox2 = string.Empty;
List<string> _dataGridView1 = new List<string>();
/// <summary>
/// 文件默认类型
/// </summary>
string extension = ".DOC.DOCX.XLS.XLSX.PPT.PPTX.PDF.HTML.HTM.TXT";
/// <summary>
/// 日志对象
/// </summary>
private static readonly ILog log = LogManager.GetLogger(typeof(FSearch));
/// <summary>
/// 筛选文件
/// </summary>
/// <param name="i_foldPath">选择文件夹</param>
/// <param name="i_searckkey">筛选关键字</param>
public void SelectFile(string i_foldPath, string i_searckkey, ref List<string> o_Rtn)
{
try
{
_foldPath = i_foldPath;
_searckkey = i_searckkey;
string foldPath = _foldPath;
if (string.IsNullOrEmpty(foldPath))
{
log.Error("请选择文件路径！");
return;
}
string searckkey = _searckkey;
if (string.IsNullOrEmpty(searckkey))
{
log.Error("请输入搜索关键字！");
return;
}
_dataGridView1.Clear();
listDirectory(@foldPath, extension, _comboBox2, searckkey);
o_Rtn = _dataGridView1;
_lbmessage = "";
log.Error("搜索完毕");
}
catch (Exception err)
{
log.Error(err.Message);
}
}
/// <summary>
/// 列出path路径对应的文件夹中的子文件夹和文件
/// 然后再递归列出子文件夹内的文件和文件夹
/// </summary>
/// <param name="path">需要搜索文件夹的路径</param>
public void listDirectory(string path, string extension, string coding, string searckkey)
{
DirectoryInfo theFolder = new DirectoryInfo(@path);
DirectorySecurity s = new DirectorySecurity(path, AccessControlSections.Access);
//判断目录是否 可以访问
if (!s.AreAccessRulesProtected)
{
foreach (FileInfo file in theFolder.GetFiles())
{
if (string.IsNullOrEmpty(extension) || extension.Contains(file.Extension.ToUpper()))
{
_lbmessage = "正在搜索文件：" + path + "\\" + file.Name;
Application.DoEvents();
#region 标题和内容都检索
#region 检索判断标题
//默认检索 先搜索标题是否有，如果有，则退出循环，如果没有，再检索内容
if (file.Name.Contains(searckkey))
{
_dataGridView1.Add(path + "\\" + file.Name);
continue;
}
#endregion
#region 检索文档内容
try
{
using (FileStream fs = new FileStream(path + "\\" + file.Name, FileMode.Open, FileAccess.Read))
{
#region 读取Execl
if (file.Extension.ToUpper().Contains(".XLS"))
{
try
{
IWorkbook workbook = null;//全局workbook
ISheet sheet;//sheet
switch (file.Extension)
{
//xls是03，用HSSFWorkbook打开，.xlsx是07或者10用XSSFWorkbook打开
case ".xls": workbook = new HSSFWorkbook(fs); break;
case ".xlsx": workbook = new XSSFWorkbook(fs); break;
default: break;
}
fs.Close();//关闭文件流
if (workbook != null)
{
int count = workbook.NumberOfSheets;
bool bo = false; //bo初始化为假
for (int index = 0; index < count; index++)
{
if (bo)//如果bo为真
break;//退出第一层循环
sheet = workbook.GetSheetAt(index);//读取到指定的sheet
//遍历读取cell
for (int i = sheet.FirstRowNum; i <= sheet.LastRowNum; i++)
{
if (bo)//如果bo为真
break;//退出第二层循环
IRow row = sheet.GetRow(i);//得到一行
if (row != null)
{
for (int j = row.FirstCellNum; j < row.LastCellNum; j++)
{
ICell cell = row.GetCell(j);//得到cell
if (cell != null)//如果cell为null，则赋值为空
{
if (row.GetCell(j).ToString().Contains(searckkey))
{
_dataGridView1.Add(path + "\\" + file.Name);
bo = true;//bo赋为真
break;//退出第三层循环
}
}
}
}
}
}
}
//释放资源
workbook = null;
sheet = null;
}
catch (Exception err)
{
//MessageBox.Show(err.Message);
}
}
#endregion
#region 读取ppt内容
else if (file.Extension.ToUpper().Contains(".PPT"))
{
//try
//{
// //初始化一个Presentation类实例，并加载文档
// Presentation ppt = new Presentation();
// ppt.LoadFromFile(path + "\\" + file.Name);
// bool bo = false;
// foreach (ISlide slide in ppt.Slides)
// {
// if (bo)//如果bo为真
// break;//退出第一层循环
// foreach (Spire.Presentation.IShape shape in slide.Shapes)
// {
// if (bo)//如果bo为真
// break;//退出第一层循环
// if (shape is IAutoShape)
// {
// foreach (TextParagraph tp in (shape as IAutoShape).TextFrame.Paragraphs)
// {
// if (tp.Text.Contains(searckkey))
// {
// int GridIndex = this._dataGridView1.Add();
// this._dataGridView1[GridIndex].Cells[0].Value = GridIndex + 1;
// this._dataGridView1[GridIndex].Cells[1].Value = file.Name;
// this._dataGridView1[GridIndex].Cells[2].Value = path + "\\" + file.Name;
// bo = true;//bo赋为真
// break;//退出第三层循环
// }
// }
// }
// }
// }
// ppt = null; //释放资源
//}
//catch (Exception err)
//{
// //MessageBox.Show(err.Message);
//}
}
#endregion
#region 读取pdf文件
else if (file.Extension.ToUpper().Contains(".PDF"))
{
try
{
PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile(@path + "\\" + file.Name);
foreach (PdfPageBase page in pdf.Pages)
{
string content = page.ExtractText();
if (content.Contains(searckkey))
{
_dataGridView1.Add(path + "\\" + file.Name);
continue;
}
}
pdf = null;//释放资源
}
catch (Exception err)
{
}
}
#endregion
#region doc
else if (file.Extension.ToUpper().Contains(".DOC"))
{
try
{
//我还要打开这个文档玩玩
MSWord.Application app = new MSWord.Application();
MSWord.Document doc = null;
object _file = path + "\\" + file.Name;
doc = app.Documents.Open(ref _file);
string text2 = Regex.Replace(doc.Content.Text, @"(\\a|\\t|\\n|\\s+)", "");
if (text2.Contains(searckkey))
{
_dataGridView1.Add(path + "\\" + file.Name);
fs.Close();
}
doc.Close();
app.Quit();
}
catch (Exception err)
{
}
}
#endregion
#region 读取其他文本文件
else
{
Encoding codingType = Encoding.Default;
codingType = GetType(path + "\\" + file.Name); //get encode from document .
StreamReader sr = new StreamReader(fs, codingType);
String str;
while ((str = sr.ReadLine()) != null)
{
if (str.Contains(searckkey))
{
_dataGridView1.Add(path + "\\" + file.Name);
sr.Close();
fs.Close();
break;
}
}
}
#endregion
}
}
catch (Exception ex)
{
log.ErrorFormat("【{0}】文档解析异常：{1}",(path + "\\" + file.Name),ex.Message);
continue;
}
#endregion
#endregion
}
}
}
//遍历文件夹
foreach (DirectoryInfo NextFolder in theFolder.GetDirectories())
{
if ((NextFolder.Attributes & FileAttributes.Hidden) != FileAttributes.Hidden)
{
listDirectory(NextFolder.FullName, extension, coding, searckkey);
}
}
}
#region 共通方法
//编码问题目前为止，基本上没人解决，就连windows的IE的自动识别有时还识别错编码呢
//如果文件有BOM则判断，如果没有就用系统默认编码，缺点：没有BOM的非系统编码文件会显示乱码。
//调用方法： common.GetType(filename)
public System.Text.Encoding GetType(string FILE_NAME)
{
using (FileStream fs = new FileStream(FILE_NAME, FileMode.Open, FileAccess.Read))
{
System.Text.Encoding r = GetType(fs);
fs.Close();
return r;
}
}
/// <summary>
/// 通过给定的文件流，判断文件的编码类型
/// </summary>
/// <param name="fs">文件流</param>
/// <returns>文件的编码类型</returns>
public System.Text.Encoding GetType(FileStream fs)
{
byte[] Unicode = new byte[] { 0xFF, 0xFE, 0x41 };
byte[] UnicodeBIG = new byte[] { 0xFE, 0xFF, 0x00 };
byte[] UTF8 = new byte[] { 0xEF, 0xBB, 0xBF }; //带BOM
Encoding reVal = Encoding.Default;
BinaryReader r = new BinaryReader(fs, System.Text.Encoding.Default);
int i;
int.TryParse(fs.Length.ToString(), out i);
byte[] ss = r.ReadBytes(i);
if (IsUTF8Bytes(ss) || (ss[0] == 0xEF && ss[1] == 0xBB && ss[2] == 0xBF))
{
reVal = Encoding.UTF8;
}
else if (ss[0] == 0xFE && ss[1] == 0xFF && ss[2] == 0x00)
{
reVal = Encoding.BigEndianUnicode;
}
else if (ss[0] == 0xFF && ss[1] == 0xFE && ss[2] == 0x41)
{
reVal = Encoding.Unicode;
}
r.Close();
return reVal;
}
/// <summary>
/// 判断是否是不带 BOM 的 UTF8 格式
/// </summary>
/// <param name=“data“></param>
/// <returns></returns>
private bool IsUTF8Bytes(byte[] data)
{
int charByteCounter = 1; //计算当前正分析的字符应还有的字节数
byte curByte; //当前分析的字节.
for (int i = 0; i < data.Length; i++)
{
curByte = data[i];
if (charByteCounter == 1)
{
if (curByte >= 0x80)
{
//判断当前
while (((curByte <<= 1) & 0x80) != 0)
{
charByteCounter++;
}
//标记位首位若为非0 则至少以2个1开始 如:110XXXXX...........1111110X
if (charByteCounter == 1 || charByteCounter > 6)
{
return false;
}
}
}
else
{
//若是UTF-8 此时第一位必须为1
if ((curByte & 0xC0) != 0x80)
{
return false;
}
charByteCounter--;
}
}
if (charByteCounter > 1)
{
throw new Exception("非预期的byte格式");
}
return true;
}
#endregion
}
标签：文件,string,c#,searckkey,foldPath,ss,new,筛选,byte 来源： https://www.cnblogs.com/lhlong/p/14366229.html