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Check if cyclic string or not

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Enter a string of characters S. Indicates whether the string S is cyclic or not.
For example S='abcdabcdabcdabcd' is cyclic.
My teacher want me to do this but i think it's too hard. I'm thinking using SplitString but it's just an idea and i dont know how to do. I'm very thankful if someone gives me help

using System;
using System.Collections;
public class MYCLASSNAME {
public static void Main(string[] args){
var str = "abcdabcdabcdabcd";
Console.Write(checkCyclicString(str));
}
static bool checkCyclicString (string str){
var checkString ="";
for(var i=0;i<str.Length-1;i++){
checkString= checkString+ str[i];
var countOfCycles =0;
var haveCycles = false;
for(var j=i+1;j<str.Length-checkString.Length+1;j= j+checkString.Length){
if(checkString==str.Substring(j,checkString.Length)){
haveCycles = true;
countOfCycles++;
}else{
haveCycles =false;
}
}
if(haveCycles && countOfCycles == Math.Ceiling((double)(str.Length/checkString.Length))-1){
return true;
}
}
return false;
}
}
check the cyclic behavior by creating substrigs and comparing them with all the parts of the given string

Unable to convert nested dictionaries from json back to c# using Json.Net [closed]

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I am able to convert my nested dictionary to json but in attempting to use Json.Net.JsonNet.Deserialize<SortedDictionary<string, dynamic>>(js) it causes a null reference exception where js is loaded from a file containing: "{"Table":{"RowEntries":{}}}". Not sure what to do from here.
here is code to those it may concern:
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
if (openFileDialog1.FileName != "" && openFileDialog1.FileName.EndsWith(".fdb"))
{
defaultPath = openFileDialog1.FileName;
js = #File.ReadAllText(openFileDialog1.FileName);
Console.WriteLine(js);
SortedDictionary<string, dynamic> cd;
try
{
cd = Json.Net.JsonNet.Deserialize<SortedDictionary<string, dynamic>>(js);
DatabaseFunct.currentData.Concat(cd);
//load tables
string[] mainTableKeys = DatabaseFunct.GetMainTableKeys();
foreach (string mainTableKey in mainTableKeys)
{
Program.mainForm.tabControl1.TabPages.Add(mainTableKey, mainTableKey);
}
//fileName = openFileDialog1.FileName.Remove(openFileDialog1.FileName.Length-4, openFileDialog1.FileName.Length);
Program.mainForm.label1.Visible = false;
//triggers event
Program.mainForm.tabControl1.SelectedIndex = 0;
}
catch(Exception e)
{
System.Windows.Forms.MessageBox.Show(e.Message);
}
}
else
{
System.Windows.Forms.MessageBox.Show("no valid file selected!");
}
}
Edit:
Was using the wrong Json.net package instead of the newtonsoft one.

Not sure what you are trying to achieve exactly, but based on provided json this should work:
class MyClass
{
public dynamic RowEntries { get; set; }
}
JsonNet.Deserialize<Dictionary<string, MyClass>>("{\"Table\":{\"RowEntries\":{}}}")

How do I "Unit Test" in C#? [closed]

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Closed 7 years ago.
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So I have this method in my project:
public static String MD5Hash(string TextToHash)
{
if ((TextToHash == null) || (TextToHash.Length == 0))
{
return String.Empty;
}
MD5 md5 = new MD5CryptoServiceProvider();
byte[] textToHash = Encoding.Default.GetBytes(TextToHash);
byte[] result = md5.ComputeHash(textToHash);
return System.BitConverter.ToString(result);
}
And I've tried testing like this:
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using BugMon;
namespace BugMonTesting
{
[TestClass]
public class UnitTest1
{
[TestMethod]
public void TestMethod1()
{
string pwd = "Password";
string expected = "DC-64-7E-B6-5E-67-11-E1-55-37-52-18-21-2B-39-64";
frmLogIn.MD5Hash(pwd);
Assert.AreEqual(pwd, expected);
}
}
}
But the string pwd does not seem to be passing through the Method when I run the test and stays as "Password".
What am I doing wrong?
Sorry if this is obvious but I've never had to use these tests before.

You're never doing anything with the return value from MD5Hash.
Try this:
string hash = frmLogIn.MD5Hash(pwd);
Assert.AreEqual(hash, expected);
Note that this will only work if MD5Hash returns a string formatted like the expected variable.

Read the lines in a text file after a certain line (c sharp)? [closed]

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Let's say I have a text file with this info:
...
Hey
all
this
is
my
question
...
All I want to take are the lines that contain "this" "is" & "my" , I don't know how far they are from the top nor how far they are from the bottom, all I know is that they are in that order and the lines they are surrounded by contain "all" and "question" . I already used a while loop to take everything up to "question", but I don't know how to indicate that it should neglect everything up to "this" (not including it). Could you help me?

the "easiest" route is to convert the file's lines into a list, and use generic collection methods to do what you want.
List<string> AllLines = File.ReadAllLines(yourpath).ToList();
int StartIndex = AllLines.IndexOf(ContainerStartString) + 1;
int EndIndex = AllLines.IndexOf(ContainerEndString) - 1;
List<string> MyLines = AllLines.GetRange(StartIndex, EndIndex);

Been doing it this way for 40 years
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
namespace ConsoleApplication1
{
class Program
{
const string FILENMAME = #"c:\temp\test.txt";
enum State
{
FIND_HEY,
GET_DATA,
FOUND_QUESTION
}
static void Main(string[] args)
{
StreamReader reader = new StreamReader(FILENMAME);
string inputline = "";
State state = State.FIND_HEY;
while ((inputline = reader.ReadLine()) != null)
{
inputline = inputline.Trim();
if (inputline.Count() > 0)
{
switch (state)
{
case State.FIND_HEY :
if(inputline.ToUpper().Contains("HEY"))
{
state = State.GET_DATA;
}
break;
case State.GET_DATA :
if(inputline.ToUpper().Contains("QUESTION"))
{
state = State.FOUND_QUESTION;
}
else
{
Console.WriteLine(inputline);
}
break;
case State.FOUND_QUESTION :
break;
}
}
}
Console.ReadLine();
}
}
}
​

How do I get the duration of a video file using C#? [closed]

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Any library in C# that allows me to do that?

google result for http://johndyer.name/post/2005/07/22/Retreiving-the-duration-of-a-WMV-in-C.aspx
using WMPLib; // this file is called Interop.WMPLib.dll
WindowsMediaPlayerClass wmp = new WindowsMediaPlayerClass();
IWMPMedia mediaInfo = wmp.newMedia("myfile.wmv");
// write duration
Console.WriteLine("Duration = " + mediaInfo.duration);
// write named attributes
for (int i=0; i<mediaInfo.attributeCount; i++)
{
Console.WriteLine(mediaInfo.getAttributeName(i) + " = " + mediaInfo.getItemInfo(mediaInfo.getAttributeName(i)) );
}

You can try this Extension method.
using Shell32;
public static class Extension
{
public static string GetLength(this FileInfo info)
{
var shell = new ShellClass();
var folder = shell.NameSpace(info.DirectoryName);
var item = folder.ParseName(info.Name);
return folder.GetDetailsOf(item, 27);
}
}

I hope following code snippet will help you :
using WMPLib;
// ...your code here...
var player = new WindowsMediaPlayer();
var clip = player.newMedia(filePath);
Console.WriteLine(TimeSpan.FromSeconds(clip.duration));
and don't forget to add the reference of wmp.dll which will be
present in System32 folder.