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POHow to read and write a file after receiving an array with repeated items
 

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  1. POHow to read and write a file after receiving an array with repeated items
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    <p>I receive a list of products(listS) and a list of its quantity(listI), what I want is to remove some items from my database, depending on the quantity that I receive on the listI. It is working like a charm, as long as, I don't receive repeated products on the listS, and that's what I'm trying to solve.</p> <pre><code> public void remove(string[] listS, int[] listI) { int check = 0; int quantidadeDB; string ingredientDB; string ingredient; int quantity; string newLine; string[] linesSplit; string[] lines = System.IO.File.ReadAllLines("c:\\z.txt"); System.IO.StreamWriter fileTemp = new System.IO.StreamWriter("c:\\z2.txt"); for(int i = 0; i &lt; lines.Length;i++) { linesSplit = lines[i].Split(' '); ingredientDB = linesSplit[0]; quantityeDB = int.Parse(linesSplit[1]); check = 0; for(int j=0;j&lt;listS.Length;j++) { ingredient = listS[j]; quantity = listI[j]; if (ingredientDB.ToLower().Equals(ingredient.ToLower())) { newLine = ingredientDB + " " + (quantityDB - quantity); fileTemp.WriteLine(newLine); check++; } } if(check.Equals(0)) fileB.WriteLine(ingredientDB + " " + quantityDB); } fileTemp.Close(); string text = System.IO.File.ReadAllText("c:\\z2.txt"); System.IO.StreamWriter fileL = new System.IO.StreamWriter("c:\\z.txt"); fileL.Write(text); fileL.Close(); } </code></pre> <p>Example: If my database was this one: Fanta 100 Pepsi 2 Coca-Cola 3 IcedTea 23 Ketchup 23</p> <p>After receiving this arrays: </p> <pre><code>listS= {"Pepsi", "Pepsi", "Ketchup", "Pepsi", "Ketchup"}; listI = {2, 3, 1, 3, 2}; </code></pre> <p><strong>This is how it should the output:</strong></p> <pre><code>Fanta 100 Pepsi -6 Coca-Cola 3 IcedTea Ketchup 20 </code></pre> <p><strong>Instead of:</strong> </p> <pre><code>Fanta 100 Pepsi 0 Pepsi -1 Pepsi -1 Coca-Cola 3 IcedTea 23 Ketchup 22 Ketchup 21 </code></pre>
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    1. COWhy did you show `Pepsi -6` in the output? Are you `showing deducted quantity` only or you meant `after deduction what is remaining there`?
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    2. COI meant after deduction what is renaming there. I forgot to say but listI[1] its listS[1] quantity, and so on.
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    3. COYou have only `2 pepsi` in DB. After deduction it should be `pepsi -4`. But you are showing `pepsi -6` as output. What does it mean?
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