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I am trying to extract the PropertyInfo of an object but the propertyInfo returns no properties:
[TestMethod]
public void TestGetValueMethod()
{
var value = 23;
System.Reflection.PropertyInfo[] propertyInfo = value.GetType ().GetProperties();
//DTOPropertyInfo info = new DTOPropertyInfo(propertyInfo[0]);
System.Diagnostics.Debug.WriteLine(propertyInfo.Length);
}
propertyInfo.Length returns 0. What am I missing?
using System;
using System.Reflection;
class Example
{
public static void Main()
{
string test = "abcdefghijklmnopqrstuvwxyz";
// Get a PropertyInfo object representing the Chars property.
PropertyInfo pinfo = typeof(string).GetProperty("Chars");
// Show the first, seventh, and last letters
ShowIndividualCharacters(pinfo, test, 0, 6, test.Length - 1);
// Show the complete string.
Console.Write("The entire string: ");
for (int x = 0; x < test.Length; x++)
{
Console.Write(pinfo.GetValue(test, new Object[] {x}));
}
Console.WriteLine();
}
static void ShowIndividualCharacters(PropertyInfo pinfo,
object value,
params int[] indexes)
{
foreach (var index in indexes)
Console.WriteLine("Character in position {0,2}: '{1}'",
index, pinfo.GetValue(value, new object[] { index }));
Console.WriteLine();
}
}
Related
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I have a variable usersInput which has a value Console.ReadLine()
I want to add this variable to the array built with List
static void Resize<T>(ref List<T> array, string name)
{
array.Add(name);
Console.WriteLine();
for (int i = 0; i < array.Count; i++)
{
Console.WriteLine(array[i]);
}
}
static void Main(string[] args)
{
List<string> teachers = new List<string> { "1", "2", "3"};
Console.WriteLine("Enter a name");
string userInput = Console.ReadLine();
Resize(ref teachers, userInput);
}
Why do you need Resize<T> method at all? You could do it easier:
static void Main(string[] args)
{
List<string> teachers = new List<string> { "1", "2", "3" };
Console.WriteLine("Enter a name");
string userInput = Console.ReadLine();
if (string.IsNullOrWhiteSpace(userInput) || !string.IsNullOrEmpty(userInput))
{
teachers.Add(userInput);
}
// if want to change list to array then use
// var arr = teachers.ToArray();
foreach (var teacher in teachers)
{
Console.WriteLine(teacher);
}
}
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I have text file like this:
VehicleReferenceKey:2365565656
DriverReferenceKey:965454545454
Latitude:30000
**
VehicleReferenceKey:96896A4607A6
DriverReferenceKey:96896A4607A6
Latitude:500
**
VehicleReferenceKey:822F5B18
DriverReferenceKey:822F5B18
Latitude:1000
I try To convert this text file to Excel
first i made an Class as
public class Item
{
public string VehicleReferenceKey;
public string DriverReferenceKey;
public string Latitude;
}
then i read all text file and looping of it as
var lines = File.ReadAllLines(fileName);
for (var i = 0; i < lines.Length; i += 1) {
var line = lines[i];
// Process line
}
but I Can't determine how i can specify the Key and value
for each line , and how tell the sign
**
as it's breaker between each object .Any Help
Try following code :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
namespace ConsoleApplication87
{
class Program
{
const string FILENAME = #"c:\temp\test.txt";
static void Main(string[] args)
{
Item items = new Item(FILENAME);
}
}
public class Item
{
public static List<Item> items = new List<Item>();
public string VehicleReferenceKey;
public string DriverReferenceKey;
public string Latitude;
public Item() { }
public Item(string filenam)
{
StreamReader reader = new StreamReader(filenam);
string line = "";
Item newItem = null;
while ((line = reader.ReadLine()) != null)
{
line = line.Trim();
if (line.Length > 0)
{
string[] rowItems = line.Split(new char[] { ':' });
switch (rowItems[0])
{
case "VehicleReferenceKey" :
newItem = new Item();
items.Add(newItem);
newItem.VehicleReferenceKey = rowItems[1];
break;
case "DriverReferenceKey":
newItem.DriverReferenceKey = rowItems[1];
break;
case "Latitude":
newItem.Latitude = rowItems[1];
break;
}
}
}
}
}
}
Basically it seems the following hold for your file:
The first item takes 3 lines (one for each field)
Every item after the first takes 7 lines (2 empty lines, 1 line containing "**", 1 empty line and then the 3 lines with the field values)
So there's no reason to parse the ** and the empty lines you can just skip those (by looping over 7 lines at a time).
For the seperating key and value you can use the String.Split method.
All in all it would look something like this:
for (var i = 0; i < lines.Length + 2; i += 7)
{
var newItem = new Item(){
VehicleReferenceKey = lines[i].Split(':')[1],
DriverReferenceKey = lines[i+1].Split(':')[1],
Latitude = lines[i+2].Split(':')[1]
}
//do whatever you want with the newItem
}
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The method looks as following:
private static List<string> SetPointObjectDefectRow(string[] row, string owner)
{
const int zone = 54;
const string band = "U";
if (Helpers.NormalizeLocalizedString(row[7]).Contains(#"a") ||
Helpers.NormalizeLocalizedString(row[12]).Contains(#"b"))
{
var geoPosition = UtmConverter.StringUtmFormatToLocation(zone, band, Convert.ToDouble(row[15]), Convert.ToDouble(row[14]));
var beginGeoPosition = geoPosition.LatString + ", " + geoPosition.LngString;
var result = new List<string>
{
owner,
row[4],
beginGeoPosition
};
return result;
}
}
It's obvious that not all paths return something and the issue is I can't return null.
How to rearrange the method?
Maybe you can initialize your List?
private static List<string> SetPointObjectDefectRow(string[] row, string owner)
{
const int zone = 54;
const string band = "U";
List<string> result = new List<string>()
{
owner,
string.Empty,
string.Empty
};
if (Helpers.NormalizeLocalizedString(row[7]).Contains(#"a") ||
Helpers.NormalizeLocalizedString(row[12]).Contains(#"b"))
{
var geoPosition = UtmConverter.StringUtmFormatToLocation(zone, band, Convert.ToDouble(row[15]), Convert.ToDouble(row[14]));
var beginGeoPosition = geoPosition.LatString + ", " + geoPosition.LngString;
result = new List<string>
{
owner,
row[4],
beginGeoPosition
};
}
return result;
}
I usually do this when I want to create an assembler method for example to tranform a List<X> to another List<Y>, so if my List<X> is null I try to return an empty List of Y. I prefer to do this instead of throwing exceptions and getting my Dashboard full of errors. But It depends on how your codes works.
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By using RegEx, or String.Replace, I need to replace any number of consecutive #'s (with the appropriate number of leading 0's) with an integer. I know I can search for # in the string, get the First and Last index, Last-First for the length, then replace with String.Replace. I was hoping someone would have a faster, and more slick answer.
Method header would be:
string ReplaceHashtagsWithInt(string input, int integer)
Examples:
Input -> "String####_Hi##", 2
Output -> "String0002_Hi02"
Input -> "String####_Hi##", 123
Output -> "String0123_Hi123"
public static class Testing
{
public static void Main()
{
ReplaceHashtagsWithInt("String####_Hi##", 2);
ReplaceHashtagsWithInt("String####_Hi###", 123);
ReplaceHashtagsWithInt("String####_Hi#######", 123);
}
public static string ReplaceHashtagsWithInt(string input, int integer)
{
Regex regex = new Regex("#+");
var matches = regex.Matches(input).Cast<Match>().Select(m => m.Value).ToArray();
Array.Sort(matches);
Array.Reverse(matches);
foreach (string match in matches)
{
Regex r = new Regex(match);
string zeroes = new string('0', match.Length - integer.ToString().Length) + integer;
input = r.Replace(input, zeroes);
}
return input;
}
}
You can do something like this:
using System;
using System.Text;
using System.Text.RegularExpressions;
public static class Testing
{
public static void Main()
{
Console.WriteLine(ReplaceHashtagsWithInt("###_####_#", 1));
Console.WriteLine(ReplaceHashtagsWithInt("###_####_#", 23));
Console.WriteLine(ReplaceHashtagsWithInt("###_####_#", 456));
Console.WriteLine(ReplaceHashtagsWithInt("###_####_#", 7890));
Console.WriteLine(ReplaceHashtagsWithInt("###_####_#", 78901));
}
public static string ReplaceHashtagsWithInt(string input, int integer)
{
Regex regex = new Regex("#+");
StringBuilder output = new StringBuilder(input);
int allig = 0;
for(Match match = regex.Match(input);match.Success;match = match.NextMatch())
{
string num = integer.ToString();
if(num.Length<=match.Length)
for(int i=0;i<match.Length;i++)
{
if(i<match.Length-num.Length)
output[match.Index+i+allig] = '0';
else
output[match.Index+i+allig] = num[i-match.Length+num.Length];
}
else
{
output.Remove(match.Index+allig,match.Length);
output.Insert(match.Index+allig,num);
allig+=num.Length-match.Length;
}
}
return output.ToString();
}
}
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In C# I'm trying to search for the substring "flight%sin" where %s would be a string. How would I do this using regex in c#?
You can capture the text between "flight" and "in" using #"flight(\w+)in"
The reference guide provides more detail.
Here is a Regex example in C#.
string [] mystrings = new string [] {"flight%sin", "flightTest1sin", "flighNoGoodsin", "flightTest2sin"};
foreach (string s in mystrings)
{
var groups = Regex.Match(s, #"flight(\w+)in");
if (groups.Groups.Count > 1)
{
Console.WriteLine(groups.Groups[1]);
}
}
Console.ReadKey();
Does this help?
string data = "flight 4057 in"; //I am guessing, this is what the original string will be.
public string getFlightNumber(string data)
{
int flightNumLength = 4;// Or however long the string would be
for(int index = 0; index < data.length(); index++)
{
if(index+flightNumLength + index < data.length())
{
string TempFlight = data.subSting(index, flightNumLength);
if(isNumeric(TempFlight))
{
return TempFlight;
}
}
}
}
public static bool IsNumeric(object Expression){
bool isNum;
double retNum;
isNum = Double.TryParse(Convert.ToString(Expression), System.Globalization.NumberStyles.Any,System.Globalization.NumberFormatInfo.InvariantInfo, out retNum );
return isNum;
}