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You can't test the data type of the entire column because Excel does not restrict the data types of all the cells in the column to be the same. You would have to test the data type held in individual cells. As long as the cell is not empty, you can test for the data type held by the cell by calling the <code>Object.GetType()</code> method on the value held by the cell: <pre><code>// Using C# 4.0 Type type = worksheet.Cells[1,1].Value.GetType(); </code></pre> Using C# 3.0 would be a little more cumbersome: <pre><code>// Using C# 3.0 Type type = (worksheet.Cells[1, 1] as Excel.Range).get_Value(Type.Missing).GetType(); </code></pre> If the cell could be empty, however, you'll have to test for that because the <code>Range.Value</code> returned by an empty cell is <code>null</code>, and you can't call <code>Object.GetType()</code> on <code>null</code>. Therefore, you have to test for <code>null</code> explicitly: <pre><code>// Testing Cell Data Type via C# 4.0 object value = worksheet.Cells[1,1].Value; string typeName; if (value == null) { typeName = "null"; } else { typeName = value.GetType().ToString(); } MessageBox.Show("The value held by the cell is a '" + typeName + "'"); </code></pre> If using C# 3.0, the code is similar: <pre><code>// Testing Cell Data Type via C# 3.0 object value = (worksheet.Cells[1, 1] as Excel.Range).get_Value(Type.Missing); string typeName; if (value == null) { typeName = "null"; } else { typeName = value.GetType().ToString(); } MessageBox.Show("The value held by the cell is a '" + typeName + "'"); </code></pre> Hope this helps... -- Mike
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.