Skip items of a specific type in foreach loop

I have this code for filling datatable from excel file:

for (int rowIndex = cells.FirstRowIndex; rowIndex <= cells.LastRowIndex; rowIndex++)
{
    var values = new List<string>();
    foreach (var cell in cells.GetRow(rowIndex))
    {
        values.Add(cell.Value.StringValue);
    }
    dataTable.LoadDataRow(values.ToArray(), true);
}

I have problem when cell is not same datatype as I set in table.

How to skip cell which is wrong datatype?

I also know this, but I can't make it work in my case:

foreach //...
{
    if //if datatype is not right
    {
        continue;
    }
}