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POLinq join 2 datatables that share a column and put result in new datatable
 

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  1. POLinq join 2 datatables that share a column and put result in new datatable
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    <p>I have the following datatables</p> <p><strong>table1</strong>:</p> <pre class="lang-none prettyprint-override"><code>+-----------+------+------+ | catalogid | name | snum | +-----------+------+------+ | 353 | xx | 4 | | 364 | yy | 3 | | 882 | zz | 3 | | 224 | mm | 71 | | 999 | kk | 321 | | 74 | kk | 4 | | 54 | ii | 5 | | 11 | u | 6 | | 23 | yy | 6 | +-----------+------+------+ </code></pre> <p><strong>table2</strong>:</p> <pre class="lang-none prettyprint-override"><code>+-----------+----------+--------------+ | catalogid | numitems | ignoreditems | +-----------+----------+--------------+ | 353 | 4 | 0 | | 364 | 10 | 0 | | 882 | 2 | 0 | | 224 | 0 | 7 | +-----------+----------+--------------+ </code></pre> <p>Using LINQ I want to join them and copy the result to a new datatable. They both share <code>catalogid</code>, and in the result it should only display the records that their catalogid exist in table2</p> <p><strong>result</strong>:</p> <pre class="lang-none prettyprint-override"><code>+-----------+------+------+-----------+---------------+ | catalogid | name | snum | numitems | ignoreditems | +-----------+------+------+-----------+---------------+ | 353 | xx | 4 | 4 | 0 | | 364 | yy | 3 | 10 | 0 | | 882 | zz | 3 | 2 | 0 | | 224 | mm | 71 | 0 | 7 | +-----------+------+------+-----------+---------------+ </code></pre> <p>Here is my attempt but it's not working:</p> <pre class="lang-vb prettyprint-override"><code> Dim query = From a In oresult.AsEnumerable Group Join b In products.AsEnumerable On a.Field(Of Integer)("catalogid") Equals b.Field(Of Integer)("catalogid") Into Group query.copytodatatable </code></pre> <p><code>CopyToDatatable</code> is not working, and I can't figure out why</p>
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