本文整理汇总了C#中System.IO.StreamReader.Peek方法的典型用法代码示例。如果您正苦于以下问题：C# StreamReader.Peek方法的具体用法？C# StreamReader.Peek怎么用？C# StreamReader.Peek使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.IO.StreamReader的用法示例。
在下文中一共展示了StreamReader.Peek方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: ReadRecords
private IEnumerable<Record> ReadRecords(string fileName)
{
var stringBuilder = new StringBuilder();
using (var reader = new StreamReader(fileName))
{
ReadOnlyCollection<string> header;
if (reader.Peek() >= 0)
{
var first = this.ParseLine(reader.ReadLine(), stringBuilder).ToArray();
header = new ReadOnlyCollection<string>(first);
}
else
{
yield break;
}
for (var i = 0; i < this._numberRecordsToSkip && reader.Peek() >= 0; i++)
{
reader.ReadLine();
}
while (reader.Peek() >= 0)
{
var items = this.ParseLine(reader.ReadLine(), stringBuilder).ToArray();
yield return new Record(header, items);
}
}
}示例2: ReadAll
public virtual List<student> ReadAll(string fileName)
{
FileStream file = new FileStream(fileName, FileMode.Open, FileAccess.Read);
StreamReader sr = new StreamReader(file);
List<student> result = new List<student>();
if (Indexed)
{
FileStream fs = new FileStream("Index.txt", FileMode.Open, FileAccess.Read);
StreamReader Sr = new StreamReader(fs);
if (Sr.Peek() != -1)
CurrentIndexVal1 = int.Parse(Sr.ReadLine());
while (Sr.Peek() != -1)
{
CurrentIndexVal2 = int.Parse(Sr.ReadLine());
student std = this.Read(sr);
result.Add(std);
CurrentIndexVal1 = CurrentIndexVal2;
}
}
else
{
while (sr.Peek() != -1)
{
student std = this.Read(sr);
result.Add(std);
}
}
sr.Close();
return result;
}示例3: AddCurrentRow
public static void AddCurrentRow(int oneChar, StreamReader DataStream)
{
if (oneChar == 10 && DataStream.Peek() == 13) { DataStream.Read(); }
else if (oneChar == 13 && DataStream.Peek() == 10) { DataStream.Read(); }
CurrentRow += 1;
CurrentColumn = 0;
}示例4: CsvToDt
/// <summary>
/// 将Csv读入DataTable
/// </summary>
/// <param name="filePath">csv文件路径</param>
/// <param name="n">表示第n行是字段title,第n+1行是记录开始</param>
public static DataTable CsvToDt(string filePath, int n)
{
DataTable dt = new DataTable();
StreamReader reader = new StreamReader(filePath, System.Text.Encoding.UTF8, false);
int i = 0;
int m = 0;
reader.Peek();
while (reader.Peek() > 0)
{
m = m + 1;
string str = reader.ReadLine();
if (m >= n + 1)
{
string[] split = str.Split(',');
System.Data.DataRow dr = dt.NewRow();
for (i = 0; i < split.Length; i++)
{
dr[i] = split[i];
}
dt.Rows.Add(dr);
}
}
return dt;
}示例5: Csv2DataTable
/// <summary>
/// 将CSV格式的流读入table
/// </summary>
/// <param name="ms">数据流</param>
/// <param name="n">整型值</param>
/// <returns>DataTable</returns>
public static DataTable Csv2DataTable(MemoryStream ms, int n)
{
var dt = new DataTable();
using (var reader = new StreamReader(ms))
{
int i = 0, m = 0;
reader.Peek();
while (reader.Peek() > 0)
{
m = m + 1;
string str = reader.ReadLine();
if (m >= n + 1)
{
string[] split = str.Split(',');
DataRow dr = dt.NewRow();
for (i = 0; i < split.Length; i++)
{
dr[i] = split[i];
}
dt.Rows.Add(dr);
}
}
return dt;
}
}示例6: ProcessDigit
public static String ProcessDigit(int FirstCharactor, StreamReader DataStream)
{
StringBuilder theNumber = new StringBuilder();
theNumber.Append((char)FirstCharactor);
int peekedChar;
//43 + 45 - 46 .
while (((peekedChar = DataStream.Peek()) >= 48 && peekedChar <= 57)
|| peekedChar == 46)
{
theNumber.Append((char)DataStream.Read());
}
if (peekedChar == 69) // E
{
theNumber.Append((char)DataStream.Read());
if ((peekedChar = DataStream.Peek()) == 43 || peekedChar == 45)
{
theNumber.Append((char)DataStream.Read());
}
while ((peekedChar = DataStream.Peek()) >= 48 && peekedChar <= 57)
{
theNumber.Append((char)DataStream.Read());
}
}
return theNumber.ToString();
//Console.WriteLine(theNumber);
}示例7: Split
public void Split()
{
int split_num = 1;
string destFilePart = Path.Combine(_opts.WorkingDirectory, string.Format(_opts.SplitFilePattern, split_num));
StreamWriter sw = new StreamWriter(destFilePart);
long read_line = 0;
using (StreamReader sr = new StreamReader(_opts.InputFileName))
{
while (sr.Peek() >= 0)
{
// Progress reporting
//if (++read_line % rowDivider == 0)
// Console.Write("{0:f2}% \r",
// 100.0 * sr.BaseStream.Position / sr.BaseStream.Length);
// Copy a line
sw.WriteLine(sr.ReadLine());
// If the file is big, then make a new split,
// however if this was the last line then don't bother
if (read_line / split_num > _opts.FileSizeDivider && sr.Peek() >= 0)
{
sw.Close();
destFilePart = Path.Combine(_opts.WorkingDirectory, string.Format(_opts.SplitFilePattern, split_num++));
sw = new StreamWriter(destFilePart);
}
}
}
sw.Close();
}示例8: ReadNumber
private string ReadNumber(StreamReader FileReader)
{
string TempString = "";
while ((FileReader.Peek() >= 0) && ((Char.IsNumber((char)FileReader.Peek()))
|| ((char)FileReader.Peek() == '.')))
{
TempString += (char)FileReader.Read();
}
if ((((char)FileReader.Peek()) == 'E') || (((char)FileReader.Peek()) == 'e'))
{
TempString += (char)FileReader.Read();
while (Char.IsNumber((char)FileReader.Peek()))
{
TempString += (char)FileReader.Read();
}
if ((((char)FileReader.Peek()) == '+') || (((char)FileReader.Peek()) == '-'))
{
TempString += (char)FileReader.Read();
while (Char.IsNumber((char)FileReader.Peek()))
{
TempString += (char)FileReader.Read();
}
}
}
return TempString;
}示例9: LoadEntries
public static List<Employee> LoadEntries()
{
List<Employee> list = null;
try {
using (FileStream fileStream = new FileStream(inputFile, FileMode.Open, FileAccess.Read)) {
using (StreamReader reader = new StreamReader(fileStream)) {
//Populate List from lines in file
list = new List<Employee>();
while (reader.Peek() != -1) {
Employee employee = new Employee();
for (int i = 0; i <= 3; i++) {
string line;
if (reader.Peek() != -1) {
line = reader.ReadLine();
} else {
break;
}
switch (i) {
case 0:
employee.firstName = line;
break;
case 1:
employee.lastName = line;
break;
case 2:
employee.employeeID = Convert.ToInt32(line.Substring(2));
break;
case 3:
employee.department = line;
break;
}
}
list.Add(employee);
if (reader.Peek() != -1) {
reader.ReadLine();
}
}
}
}
} catch (FileNotFoundException) {
MessageBox.Show("File not found: " + inputFile, "File Error");
} catch (DirectoryNotFoundException) {
MessageBox.Show("Directory not found: " + inputDir, "Directory Error");
} catch (IOException ex) {
MessageBox.Show(ex.GetType() + ": " + ex.Message, "IOException");
}
return list;
}示例10: GetContactAccessor
/// <summary>
/// 从CSV文件总获取联系人的方法
/// </summary>
/// <param name="fileStream">CSV文件流</param>
/// <returns>联系人字典</returns>
public static Dictionary<string, string> GetContactAccessor(Stream fileStream)
{
System.IO.StreamReader reader = new System.IO.StreamReader(fileStream, Encoding.Default);
Dictionary<string, string> contacts = new Dictionary<string, string>(); //存放读取出来的csv联系人
//根据表头确定联系人的名字在什么地方。
int lastNameIndex = -1;
int firstNameIndex = -1;
if (reader.Peek() > 0)
{
string contact = reader.ReadLine();
contact = contact.Replace("\"", "");
string[] contactArray = contact.Split(new char[] { ',' });
for (int i = 0; i < contactArray.Length; i++)
{
if (string.IsNullOrEmpty(contactArray[i]))
continue;
switch (contactArray[i].ToLower())
{
case "姓名":
lastNameIndex = i;
break;
case "name":
lastNameIndex = i;
break;
case "名":
lastNameIndex = i;
break;
case "姓":
firstNameIndex = i;
break;
default:
break;
}
}
}
//循环获取联系人名和Email信息
while (reader.Peek() > 0)
{
string contact = reader.ReadLine();
contact = contact.Replace("\"", "");
string[] contactArray = contact.Split(new char[] { ',' });
string name = string.Empty;
if (firstNameIndex != -1)
name += contactArray[firstNameIndex];
if (lastNameIndex != -1)
name += contactArray[lastNameIndex];
Regex regex = new Regex(@"\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*");
Match match = regex.Match(contact);
string email = null;
if (match.Success)
email = match.Value;
if (!string.IsNullOrEmpty(email) && !string.IsNullOrEmpty(name))
contacts[email] = name;
}
return contacts;
}示例11: Main
static void Main(string[] args)
{
Console.WriteLine("Enter filepath to read from");
var inputFile = Console.ReadLine();
var inputFileName = string.IsNullOrWhiteSpace(inputFile) ? @"C:\users\vshardul\desktop\testRunEntries.txt" : inputFile;
Console.WriteLine("Enter output filepath");
var outputFile = Console.ReadLine();
var outputFileName = string.IsNullOrWhiteSpace(outputFile) ? @"Output.txt" : outputFile;
Console.WriteLine("Entries to ignore - ");
var entriesToIgnore = long.Parse(Console.ReadLine());
if (!File.Exists(inputFileName))
{
Console.WriteLine("Invalid input file path");
return;
}
using (var inputStream = new StreamReader(inputFileName))
{
if (inputStream.Peek() < 0)
{
Console.WriteLine("Enpty Stream");
return;
}
var headerRow = inputStream.ReadLine();
int ignoreCount = 0;
while (ignoreCount < entriesToIgnore && inputStream.Peek() >= 0)
{
inputStream.ReadLine();
ignoreCount++;
}
using (var outputStream = new StreamWriter(outputFileName))
{
outputStream.WriteLine(headerRow);
while (inputStream.Peek() >= 0)
{
var line = inputStream.ReadLine();
if (line != null && line.Split('\t').Length == headerRow.Split('\t').Length)
{
outputStream.WriteLine(line);
}
}
outputStream.Close();
}
inputStream.Close();
}
Console.WriteLine("File content trnafer successfull");
}示例12: GetStreamDigits
public int GetStreamDigits(StreamReader sr, int count=2)
{
char inp; string nums="";
if(count<1||sr==null||sr.Peek()<0) return -1;
while(nums.Length<count && sr.Peek()>=0) {
do { inp=(char)sr.Read(); } while(!Char.IsDigit(inp) && sr.Peek()>=0);
if(Char.IsDigit(inp)) nums+=inp;
}
return nums.Length>0?int.Parse(nums):-1;
}示例13: ReadAndDecode
public String ReadAndDecode(StreamReader sr)
{
String ts=sr.ReadLine();
while((sr.Peek()==9)||(sr.Peek()==32))
{
sr.Read();
ts=ts+'\r'+'\n'+sr.ReadLine();
}
return Decode(ts);
}示例14: Formatting
public void Formatting()
{
var o = DFormattingOptions.CreateDStandard();
bool isTargetCode = false;
var rawCode = string.Empty;
var sb = new StringBuilder();
var l = new List<Tuple<string,string>>();
using(var st = Assembly.GetExecutingAssembly().GetManifestResourceStream("formatterTests")){
using(var r = new StreamReader(st))
{
int n;
while((n=r.Read()) != -1)
{
if((n == ':' && r.Peek() == ':') || (n == '#' && r.Peek() == '#'))
{
r.ReadLine();
if(n == '#')
{
if(isTargetCode)
{
l.Add(new Tuple<string,string>(rawCode, sb.ToString().Trim()));
sb.Clear();
}
else
{
rawCode = sb.ToString().Trim();
sb.Clear();
}
isTargetCode = !isTargetCode;
}
}
else if(n == '\r' || n == '\n')
{
sb.Append((char)n);
}
else
{
sb.Append((char)n);
sb.AppendLine(r.ReadLine());
}
}
}
}
foreach(var tup in l)
{
Fmt(tup.Item1, tup.Item2, o);
}
}示例15: CountProteins
public static int CountProteins(FileStream proteinFastaDatabase, bool onTheFlyDecoys, out int targetProteins, out int decoyProteins, out int onTheFlyDecoyProteins)
{
targetProteins = 0;
decoyProteins = 0;
onTheFlyDecoyProteins = 0;
StreamReader fasta = new StreamReader(proteinFastaDatabase);
string description = null;
while(true)
{
string line = fasta.ReadLine();
if(line.StartsWith(">"))
{
description = line.Substring(1);
}
if(fasta.Peek() == '>' || fasta.Peek() == -1)
{
if(description.Contains(Protein.DECOY_IDENTIFIER))
{
if(onTheFlyDecoys)
{
throw new ArgumentException(proteinFastaDatabase.Name + " contains decoy proteins; database should not contain decoy proteins when \"create target–decoy database on the fly\" option is enabled");
}
decoyProteins++;
}
else
{
targetProteins++;
if(onTheFlyDecoys)
{
onTheFlyDecoyProteins++;
}
}
description = null;
if(fasta.Peek() == -1)
{
break;
}
}
}
proteinFastaDatabase.Seek(0, SeekOrigin.Begin);
return targetProteins + decoyProteins + onTheFlyDecoyProteins;
}