使用openxml从电子表格中读取公式

Question

I'm reading a spreadsheet in C# using the Openxml library, and I'm parsing the values of the Cell object using InnerText propierty, that returns a String or null .

When in the Cell is present a formula, I get the literal text present in the spreadsheet, like that:

=Sheet1!A1Content

that is composed by: former formula ( Sheet1!A1 ) + string of the result ( Content ) and this happens also with basics like: =2+24

how do i get only the result of the formula?

Answer 1

From http://officeopenxml.com/ documentation:

For a formula, the formula itself is stored within an f element as a child element of c . Following the formula is the actual calculated value within a element.

There is also an example, this open xml for a single cell:

<c r="B9" s="3" t="str">
  <f>SUM(B2:B8)</f>
  <v>2105</v>
</c>

So in a Cell element, there is a child for the Formula and a child element for the CellValue . The InnerText property of the cell is the concatenated value of those two in your case. If you already have the cell you need you can do the following:

static string GetValue(Cell cell)
{
   //The ? operator to make sure the 'CellValue' element exists, otherwise return null
   return cell.GetFirstChild<CellValue>()?.Text;
}