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POF# insert a list into SQL Server
 

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    <p>I'm stuck at the moment trying to figure out a method of inserting into SQL Server from F#.</p> <p>I have an F# function that iterates through all files inside a folder following a user-defined pattern. Then I can use the returned data to put in a list or (ideally) insert into a database.</p> <p>I already have a working insert-into-sql function that works properly:</p> <pre class="lang-ml prettyprint-override"><code>let execNonQuery conn s = let comm = new SqlCeCommand(s, conn) try comm.ExecuteNonQuery() |&gt; ignore with e -&gt; printf "Error : %A\n" e let string = "insert into MyTable (MyColumn) values ('test .. again')" execNonQuery conn string; // works </code></pre> <p>I'm trying to get this method to work properly:</p> <pre class="lang-ml prettyprint-override"><code>let rec getAllFiles dir pattern = seq { yield! Directory.EnumerateFiles(dir, pattern) for d in Directory.EnumerateDirectories(dir) do yield! getAllFiles d pattern } let getApplications (dir : string) (extension : string) = getAllFiles dir extension //|&gt; Seq.toList // If I need to create a list of returned values |&gt; Seq.iter (fun s -&gt; SQLInsertString s) // This does not work as it complains about the function not being of type unit </code></pre> <p>If I use <code>Seq.toList</code> only and call the function as per below, it works:</p> <pre class="lang-ml prettyprint-override"><code>getApplications "C:\Admin" "*.txt" // works </code></pre> <p>The other thing I don't understand is how can you create a working insert command that takes in a string for Value. For example: </p> <pre class="lang-ml prettyprint-override"><code>let SQLInsertString s = "insert into MyTable (MyColumn) values (%s)" //does not work </code></pre>
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