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Q&A How to generate lots of hyperlinks rather fast using ClosedXML library?

One faster alternative is to use a formula to create the hyperlink. An example is provided below: public static IXLCell SetHyperLink(this IXLCell cell, string url, string text = "link") { if (s...

posted 1y ago by Alexei‭

Answer
#1: Initial revision by user avatar Alexei‭ · 2022-07-08T11:44:27Z (over 1 year ago)
One faster alternative is to use a formula to create the hyperlink. An example is provided below: 

```c#
public static IXLCell SetHyperLink(this IXLCell cell, string url, string text = "link")
{
	if (string.IsNullOrWhiteSpace(url))
		return cell;

	// ensure a valid hyperlink text
	string actualText = text?.Replace("\"", "\"\"");
	actualText = !string.IsNullOrWhiteSpace(actualText) ? actualText : "link";
	string actualUrl = url.Trim();

	bool isValidUrl = Uri.IsWellFormedUriString(actualUrl, UriKind.Absolute);
	if (isValidUrl)
	{
		cell.FormulaA1 = $"=HYPERLINK(\"{url}\", \"{actualText}\")";
		cell.Style.Font.Underline = XLFontUnderlineValues.Single;
	}
	else
	{ 
		cell.SetValue(url);
	}

	return cell;
}
```

Actual hyperlink creation is done via `cell.FormulaA1 = $"=HYPERLINK(\"{url}\", \"{actualText}\")";`, but the rest of the code is required to check for various conditions that lead to invalid formulas (this creates a nasty popup when opening the Excel file that requires the user to confirm the Excel repairing).