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POLightswitch VIN Custom Validation
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  1. POLightswitch VIN Custom Validation
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    copied!<p>I'm building some custom validation to verify Vehicle Identification Numbers (VINs) in a small LightSitch application. The custom validation is pretty simple for the most part, but I'm using code similar to what has been copied below from Rusty Davis' post at <a href="http://shapemetrics.wordpress.com/2010/08/23/vin-validation/" rel="nofollow">http://shapemetrics.wordpress.com/2010/08/23/vin-validation/</a>. </p> <pre><code>public class VIN { //Make sure no instance of this class is created... only method is static. private VIN() { } public static bool IsValidVin(string p_strVin) { bool blnIsValid = false; int intValue = 0; int[] intWeights = { 8, 7, 6, 5, 4, 3, 2, 10, 0, 9, 8, 7, 6, 5, 4, 3, 2 }; if (p_strVin == null) { return false; } else if (p_strVin.Length != 17) { return blnIsValid; } p_strVin = p_strVin.ToUpper().Trim(); int intCheckValue = 0; char check = p_strVin[8]; char year = p_strVin[9]; if (!char.IsDigit(check) &amp;&amp; check != 'X') { return blnIsValid; } else { if (check != 'X') { char[] d = new char[] { check }; intCheckValue = int.Parse(Encoding.ASCII.GetString(Encoding.ASCII.GetBytes(d))); } else { intCheckValue = 10; } } Hashtable replaceValues = new Hashtable(); replaceValues.Add('A', 1); replaceValues.Add('B', 2); replaceValues.Add('C', 3); replaceValues.Add('D', 4); replaceValues.Add('E', 5); replaceValues.Add('F', 6); replaceValues.Add('G', 7); replaceValues.Add('H', 8); replaceValues.Add('J', 1); replaceValues.Add('K', 2); replaceValues.Add('L', 3); replaceValues.Add('M', 4); replaceValues.Add('N', 5); replaceValues.Add('P', 7); replaceValues.Add('R', 9); replaceValues.Add('S', 2); replaceValues.Add('T', 3); replaceValues.Add('U', 4); replaceValues.Add('V', 5); replaceValues.Add('W', 6); replaceValues.Add('X', 7); replaceValues.Add('Y', 8); replaceValues.Add('Z', 9); replaceValues.Add('1', 1); replaceValues.Add('2', 2); replaceValues.Add('3', 3); replaceValues.Add('4', 4); replaceValues.Add('5', 5); replaceValues.Add('6', 6); replaceValues.Add('7', 7); replaceValues.Add('8', 8); replaceValues.Add('9', 9); replaceValues.Add('0', 0); //Make sure it is a Valid Year if (!replaceValues.Contains(year) &amp;&amp; year != '0') { return blnIsValid; } //Make sure characters that are in the VIN are the ones allowed. for (int i = 0; i &lt; p_strVin.Length; i++) { if (!replaceValues.Contains(p_strVin[i])) { return false; } intValue += (intWeights[i] * ((int)replaceValues[p_strVin[i]])); } if ((intValue % 11) == intCheckValue) { blnIsValid = true; } return blnIsValid; } } </code></pre> <p>The problem that I'm running into is that Visual Studio is telling me that "'System.Text.Encoding' does not contain a definition for 'ASCII'". It also says that the type or namespace "Hashtable" could not be found.</p> <p>Are these not available in LightSwitch projects? I've got all of the correct using statements. I'm confused.</p>
 

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