文档操作FileStream & String

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读文件&写文件：

FileStream StreamReader StreamWriter

f_read = L"D://VisualC//scandata.txt"; System::IO::FileStream^ r_stream = gcnew FileStream(f_read, FileMode::Open, FileAccess::Read); System::IO::StreamReader^ MyReader = gcnew StreamReader(r_stream);//MyReader->ReadToEnd(); int linenum = 0; while (reader->Peek()>=0){ String^ sr = reader->ReadLine(); if (sr->Substring(55)=="."||sr->Substring(55)==".."||sr->Substring(55)=="...") continue; linenum++; } reader->Close(); response->Close();

//String^ f_write = L"D://VisualC//scandata_w.txt"; System::IO::FileStream^ w_stream = gcnew FileStream(f_write, FileMode::OpenOrCreate, FileAccess::Write); System::IO::StreamWriter^ MyWriter = gcnew StreamWriter(w_stream); MyWriter->Write(fhead); for (int j = 0; j < i; j++) { MyWriter->Write(Convert::ToString(temp_km[j])); MyWriter->Write(" "); MyWriter->Write(Convert::ToString(temp_re[j])); MyWriter->Write(" "); MyWriter->Write(Convert::ToString(temp_im[j])); MyWriter->Write("/r/n"); } MyWriter->Close(); w_stream->Close();

字符串操作:

Insert Replace Split EndsWith

String^ b_num = String::Format(L"{0:D6}",num);//000123

String^ time = b_num->Insert(2,L":"); //插入

String^ data_rep = data_str->Replace(L"/r/n",L" ");

array<Char>^sep = gcnew array<Char>{ ' '}; //空格做分隔符

array<String^>^ split_result = data_rep->Split( sep, StringSplitOptions::RemoveEmptyEntries);

kz = kz->ToLower();

if( kz->EndsWith("jpg") || kz->EndsWith("jpeg") || kz->EndsWith("bmp")||kz->EndsWith("png")||kz->EndsWith("jif"))

listItem->ImageIndex = 6;

Format:

http://www.cnblogs.com/hwx0807/articles/1561956.html

时间格式化输出：

DateTime^ dt = DateTime::DateTime(2010,12,19,13,33,57);

String^ ts = dt->ToString(L"yyyy-MM-dd-HH:mm:ss");

String^ ts2 = dt->ToString(L"HH:mm:ss");