C#做文件內容搜索

墨蓝 2022-08-25 15:46 143阅读 0赞

C\#文件內容搜索

1.檢索指定文件中是否含有指定字符串  
/// <summary>  
/// 檢索指定文件中是否含有指定字符串  
/// </summary>  
/// <param name="strSearch">匹配字符串</param>  
/// <param name="fileName">文件完整名稱</param>  
/// <returns>若含有指定字符串,則返回true</returns>  
public bool SearchFile(string strSearch, string fileName)  
\{  
bool result = false;  
StreamReader sr = new StreamReader(fileName, System.Text.Encoding.Default);  
string strLine;  
while ((strLine = sr.ReadLine()) != null)  
\{  
if (strLine.IndexOf(strSearch) != -1)  
\{  
result = true;  
break;  
\}  
\}  
sr.Close();

return result;  
\}

2.遞歸調用  
/// <summary>  
/// 搜索指定目錄中的文件  
/// </summary>  
/// <param name="strSearch">匹配字符串</param>  
/// <param name="strDir">欲檢索的目錄</param>  
/// <param name="strExp">文件后綴名(不含點號)</param>  
/// <param name="tree">是否檢索子目錄</param>  
public void SearchFiles(string strSearch,string strDir, string strExp, bool tree)  
\{  
DirectoryInfo dir = new DirectoryInfo(strDir);  
FileInfo\[\] filelist = dir.GetFiles("\*." + strExp);  
for (int i = 0; i < filelist.Length; i++)  
\{  
//開始檢索一個文件時的代碼  
//BeginSearch(filelist\[i\].FullName);  
if (SearchFile(strSearch, filelist\[i\].FullName))  
\{  
//檢索到一個匹配文件的代碼  
//Searching(filelist\[i\].FullName);  
\}  
\}  
if (tree)  
\{  
DirectoryInfo\[\] dir1 = dir.GetDirectories();  
for (int j = 0; j < dir1.Length; j++)  
\{  
SearchFiles(strSearch,dir1\[j\].FullName.Replace("/","//"), strExp, tree);  
\}  
\}  
//檢索整個目錄完成后的代碼  
//EndSearch(strDir);  
  
\}

3.最終實現  
this.richTextBox1.Text = "";//用于顯示檢索到的文件名稱  
string strDir = this.textBox1.Text.Replace("/","//");  
string strExp = this.textBox2.Text;  
string strSearch = this.textBox3.Text;  
bool tree = this.checkBox1.Checked;  
SearchFiles(strSearch, strDir, strExp, tree);

private void BeginSearch(string strDirName)  
\{  
//this.label4.Text = filelist\[i\].FullName.ToString().Replace("/", "//");  
//this.label4.Refresh();  
\}  
private void Searching(string strFileName)  
\{  
// this.richTextBox1.AppendText(filelist\[i\].FullName.Replace("/", "//") + "/r/n");  
\}  
private void EndSearch(string strDirName)  
\{  
//this.label4.Text = "搜索完畢";  
\}

總結:在檢索時好像好挂起界面,但像這种情況,好像用BackgroundWorker進行處理也不太合适,也許應該用多線程來處理好一點.可是用多線程怎么做?