EPPlus Conditional Formatting

问题

I've tried to follow this one: Conditional Formatting by Expression using EPPlus

But in my case, the excel file was corrupted and give me option to recover with rule removed.

I want to achieve this (simplified): screenshot

Here's my codes (for column A):

ExcelWorksheet ew = ep.Workbook.Worksheets.Add("Sheet1");

var cells = new ExcelAddress("A2:A5");
string formula = "ISNUMBER(SEARCH($A$1;C2))";
var condition = ew.ConditionalFormatting.AddExpression(cells);
condition.Formula = formula;
condition.Style.Fill.PatternType = OfficeOpenXml.Style.ExcelFillStyle.Solid;
condition.Style.Fill.BackgroundColor.Color = System.Drawing.Color.Yellow;

Thanks in advance

回答1:

The reason you're getting the corruption error is due to the semi colon in the formula. A semi-colon is not a valid operator in this formula.

In response to VDWWD - I don't think the equal sign is a problem, I get the corruption error if the equal sign is used in the formula.

From the EPPlus Documentation

Don't use localized function names. Only english names (such as SUM, IF, VLOOKUP, etc) are supported.
Don't use semicolon as a separator between function arguments. Only comma is supported.
Don't add the leading = sign in your formula. "=SUM(A1:A2)" is wrong, "SUM(A1:A2)" is correct.

Epplus Formula Calculation

回答2:

For starters, there is an = missing from the formula. And I don't know what the purpose of SEARCH($A$1;C2) is, but the below code works.

//the range of cells to be searched
var cells = new ExcelAddress("A1:Z10");

//the excel formula, note that it uses the top left cell of the range
//so if the range was C5:d10, it would be =ISNUMBER(C5)
var formula = "=ISNUMBER(A1)";

var condition = worksheet.ConditionalFormatting.AddExpression(cells);
condition.Formula = formula;
condition.Style.Fill.PatternType = ExcelFillStyle.Solid;
condition.Style.Fill.BackgroundColor.Color = Color.Yellow;

来源：https://stackoverflow.com/questions/52737955/epplus-conditional-formatting

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