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POC# Comparing Two Custom Lists
 

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  1. POC# Comparing Two Custom Lists
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    <p>I have run into a situation where I need to compare two different lists to each other and I am wondering what the best method is for doing this? I thought something like this would work but it doesn't and I can't figure out why. The Linq query is returning records it shouldn't. This is my first run at trying to figure something like this out so it is undoubtedly messy.</p> <pre><code> private static List&lt;ColumnDefinition&gt; FindTableStructureUpdates(List&lt;ColumnDefinition&gt; colDefs, List&lt;ColumnDefinition&gt; tblCols) { List&lt;ColumnDefinition&gt; ColsToUpdate = new List&lt;ColumnDefinition&gt;(); for (int i = 0; i &lt; colDefs.Count; ++i) { string colDefName = colDefs[i].ColName; string colDefDataType = colDefs[i].ColType; string colDefAttribute = colDefs[i].ColAttributes; var query = from tbl in tblCols where tbl.ColName != colDefName &amp;&amp; tbl.ColType != colDefDataType &amp;&amp; tbl.ColAttributes != colDefAttribute select new { colDefName, colDefDataType, colDefAttribute }; if (query.Count() &gt; 0) { foreach (var item in query) { ColsToUpdate.Add(new ColumnDefinition(item.colDefName, item.colDefDataType, item.colDefAttribute)); } } } return ColsToUpdate; </code></pre> <p>Any suggestions would be great.</p> <p>Thanks.</p> <p>IEquatable Implementation??</p> <pre><code> #region IEquatable&lt;ColumnDefinition&gt; Members public bool Equals(ColumnDefinition other) { if (this.ColName.Equals(other.ColName) &amp;&amp; this.ColType.Equals(other.ColType) &amp;&amp; this.ColAttributes.Equals(other.ColAttributes)) return true; return false; } </code></pre>
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    1. UShakre
    1. USNathan
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    1. This table or related slice is empty.
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    1. COWhat exactly are you trying to achieve?
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      1. POC# Comparing Two Custom Lists
      1. USManu
    2. COI have a back end SQLite database and I am trying to write a method to compare what the current table structure is to what I have coded in another method so if I make an update to the table in my code the physical table. I couldn't think of an easier way to do this.
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      1. POC# Comparing Two Custom Lists
      1. USNathan
    3. COOnly a list of "updated"? No list for "added" and "removed"? Does this mean that we can assume that the two lists always contain the same number of items?
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      1. POC# Comparing Two Custom Lists
      1. USMark Byers
 

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