[英]writing to a text file and reading that text file
我已經使用了這段代碼
var dest1 = File.AppendText(Path.Combine(_logFolderPath, "log1.txt"));
dest1.WriteLine(line.Trim());
寫一個文本文件log1.txt之后,我必須閱讀這個文本文件...
我已經在變量中聲明了...我知道這是不可能的..但是我不知道如何
using (var file = File.OpenText(dest1))
如何使用打開文本文件並讀取該文件
while ((line2 = file.ReadLine()) != null)
有什么建議嗎?
編輯:
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["connectionString"].ConnectionString);
SqlDataAdapter da = new SqlDataAdapter("select codesnippet from edk_custombrsnippet_vw", con);
DataTable dt = new DataTable();
da.Fill(dt);
string line = dt.Rows[0].ItemArray[0].ToString().Replace("\n", Environment.NewLine).Replace("\r", Environment.NewLine);
;
//MessageBox.Show(line);
string Filepath2 = TextBox1.Text;
int counter = 1;
string line2;
if (File.Exists(Filepath2) )
{
DirectoryInfo Folder = new DirectoryInfo(textboxPath.Text);
var _logFolderPath = Path.Combine(textboxPath.Text.Trim(), "log");
if (Folder.Exists)
if (!Directory.Exists(_logFolderPath))
Directory.CreateDirectory(_logFolderPath);
string filename = Path.Combine(_logFolderPath, "log1.txt");
var dest1 = File.AppendText(filename);
dest1.WriteLine(line.Trim());
using (var file = File.OpenText(filename))
{
using (var file2 = File.OpenText(Filepath2))
{
bool time = false;
while ((line2 = file2.ReadLine()) != null)
{
using (var dest = File.AppendText(Path.Combine(_logFolderPath, "log.txt")))
{
if (!time)
{
dest.WriteLine("");
dest.WriteLine("---------------------" + DateTime.Now + "---------------------");
time = true;
}
bool patternwritten = false;
while ((line = file.ReadLine()) != null)
{
if (line.IndexOf(line2, StringComparison.CurrentCultureIgnoreCase) != -1)
{
if (!patternwritten)
{
dest.WriteLine("");
dest.WriteLine("Pattern Name : " + line2);
patternwritten = true;
}
dest.WriteLine("LineNo : " + counter.ToString() + " : " + " " + line.Trim());
}
counter++;
}
//FilePath.BaseStream.Seek(0, SeekOrigin.Begin);
counter = 1;
}
}
}
}
將文件名存儲在變量中,如下所示:
string filename = Path.Combine(_logFolderPath, "log1.txt");
然后在以下幾行中使用它:
var dest1 = File.AppendText(filename);
...
using (var file = File.OpenText(filename))
然后其余的應該按預期工作。 在上面的代碼中,您試圖將StreamWriter傳遞給File.OpenText方法,這是錯誤的。
寫入文件后不會關閉文件,因此程序仍然具有文件的打開句柄,這意味着您無法打開另一個句柄來讀取文件。
這一點:
var dest1 = File.AppendText(filename);
dest1.WriteLine(line.Trim());
應該:
using (var dest1 = File.AppendText(filename))
{
dest1.WriteLine(line.Trim());
}
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