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POC# RegistryKey.GetValue doesn't return blank lines
 

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  1. POC# RegistryKey.GetValue doesn't return blank lines
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    <p>So I'm writing some code and using <code>RegistryKey.GetValue</code> and I can't seem to get it to return the proper string array. I would use RegSaveKeyEx except I need to change the location of where the keys are being saved to in the reg file I'm creating.</p> <p>The MultiString I'm querying has two lines in it, <code>:</code> and a blank line. Regedit gives <code>hex(7):3a,00,00,00,00,00</code> for the reg file export of said value. This is correct. 3a would be <code>:</code>, then a null, two nulls for the blank line and finally two more nulls to signify the end of the value. My code is giving <code>hex(7):3a,00,00,00</code>, which would be a <code>:</code> and the double-null EOL characters on a MultiString. When imported back into the registry <code>hex(7):3a,00,00,00</code> is only a <code>:</code>, the blank line is missing.</p> <p>If I import <code>hex(7):3a,00,00,00,00,00</code> then view the value in regedit, I see <code>:</code> and a blank line. This is correct and this is what I want my code to do.</p> <p>When I query this value with <code>RegistryKey.GetValue</code> in C# 4.0 I get the a <code>string[]</code> with just one element, the <code>:</code>.</p> <p>For other MultiString values I get an array containing an element for every line, as I would expect.</p> <p><code>RegistryKey.GetValue</code> doesn't return anything for the blank line. It doesn't return a null, a blank string in the array, nothing.</p> <p>On everything except blank lines it returns exactly the same result as regedit export. What needs to be changed to have it return an array that includes the blank line?</p> <p>Here's my code if that's helpful:</p> <pre><code>private static string RegMultiStringExtraction(RegistryKey UsersSubKey, string Key) { string[] InputStrs = (string[])UsersSubKey.GetValue(Key, Environment.NewLine, RegistryValueOptions.DoNotExpandEnvironmentNames); StringBuilder sb = new StringBuilder(); foreach (string str in InputStrs) { char[] Values = str.ToCharArray(); foreach (char letter in Values) { int ValueInt = Convert.ToInt32(letter); sb.Append(ValueInt.ToString("x")); sb.Append(",00,"); if (Values.Length == 0) { if (sb.Length == 0) { sb.Append("00,"); } else if (sb.Length &gt; 1) { sb.Append(",00,"); } } } sb.Append("00,00,"); } string Value = ('"' + Key.ToString() + @"""=" + "hex(7):" + sb.ToString().TrimEnd(',')); return Value; } </code></pre>
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