array ? sort? text file read

Question

Hello there I have a text file with an indeterminate size of type string and double. I need to read this file and sort the double type from big to small sample bcd 1,215 efg -0.50 abc 0,125 .... ..... .... ..... ..... .... thank you

Nitin Sontakke · Answer

And here is a proper C# code sample: public class SampleClass : IComparable { public String Text { get ; set ; } public Double Value { get ; set ; } public SampleClass(String text, Double value) { Text = text; Value = value; } public override string ToString() { return "Text = " + this .Text + ", Value = " + Value.ToString(); } public int CompareTo(SampleClass other) { SampleClass y = other as SampleClass; if (y == null ) return 0; if (Value == y.Value) return 0; if (Value > y.Value) return 1; if (Value return -1; return 0; } } Then... String[] fileContents = System.IO.File.ReadAllLines(@ "E:\TextFile1.txt" ); List lsc = new List (); foreach (String line in fileContents) { String[] lineContents = line.Split( new Char[] { ' ' }); lsc.Add( new SampleClass(lineContents[0], Double.Parse(lineContents[1]))); } lsc.Sort(); foreach (SampleClass sc in lsc) { Console.WriteLine(sc.ToString()); } And here is the output... Text = KONYA, Value = -4.4 Text = ZOREN, Value = 0.124 Text = TMSN, Value = 0.19 Text = ADANA, Value = 1.52 Text = VESTL, Value = 11.57 Notice how .ToString() is used.

Nitin Sontakke · Answer

I just noticed that you wanted to have it sorted in reverse order. So we just modified the following piece of code as follows: if (Value return 1; if (Value > y.Value) return -1; All we did is swapped the . Hope it helps!

Ravi Sangtani · Answer

Hi @Deli if their is comma in digit then it throws an error so you have to replace by.. no[i] = Convert.ToDouble(arr[i].Split(' ')[1].Replace(",",""));

Nitin Sontakke · Answer

In your data I am seeing both a . and ,. I assume that . is a decimal digit. Is that right? I also assume that , is used as a thousand separator. Are these assumptions correct? Please respond. This is very important while providing solution.

Deli Dumrul · Answer

Hi again I get an error on this line no[i] = Convert.ToDouble(arr[i].Split(' ')[1]);

Ravi Sangtani · Answer

Hi @Deli try this may help you.... string[] arr = System.IO.File.ReadAllLines("E:\sample.txt"); string[] name = new string[arr.Length]; double[] no = new double[arr.Length]; for (int i = 0; i { name[i] = arr[i].Split(' ')[0].ToString(); no[i] = Convert.ToDouble(arr[i].Split(' ')[1]); } bool flag = true; double temp; string t1; int numLength = no.Length; for (int i = 1; (i { flag = false; for (int j = 0; j { if (no[j + 1] > no[j]) { t1 = name[j]; name[j] = name[j + 1]; name[j + 1] = t1; temp = no[j]; no[j] = no[j + 1]; no[j + 1] = temp; flag = true; } } } for (int i = 0; i { Console.WriteLine(name[i]+" "+no[i]); }

Deli Dumrul · Answer

Dear Nitin and Navi im grateful to you thank you so much

Deli Dumrul · Answer

mey text file is here ADANA 1.52 KONYA -4.4 ZOREN 0.124 VESTL 11.57 TMSN 0.19