Adding hyperlinks in Excel[2007] in C# - Within Excel it self

What you want to use here is the Hyperlinks.Add method.

You can call it with code that looks something like this:

Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];
Excel.Range rangeToHoldHyperlink = worksheet.get_Range("A1", Type.Missing);
string hyperlinkTargetAddress = "Sheet2!A1";

worksheet.Hyperlinks.Add(
    rangeToHoldHyperlink,
    string.Empty,
    hyperlinkTargetAddress,
    "Screen Tip Text",
    "Hyperlink Title");

Here is a full automation example that you can test:

void AutomateExcel()
{
    Excel.Application excelApp = new Excel.Application();
    excelApp.Visible = true;

    Excel.Workbook workbook = excelApp.Workbooks.Add(Type.Missing);
    workbook.Worksheets.Add(Type.Missing, Type.Missing, Type.Missing, Type.Missing);
    workbook.Worksheets.Add(Type.Missing, Type.Missing, Type.Missing, Type.Missing);

    Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];
    Excel.Range rangeToHoldHyperlink = worksheet.get_Range("A1", Type.Missing);
    string hyperlinkTargetAddress = "Sheet2!A1";

    worksheet.Hyperlinks.Add(
        rangeToHoldHyperlink,
        string.Empty,
        hyperlinkTargetAddress,
        "Screen Tip Text",
        "Hyperlink Title");

    MessageBox.Show("Ready to clean up?");

   // Cleanup:
    GC.Collect();
    GC.WaitForPendingFinalizers();
    GC.Collect();
    GC.WaitForPendingFinalizers();

    Marshal.FinalReleaseComObject(range);

    Marshal.FinalReleaseComObject(worksheet);

    workbook.Close(false, Type.Missing, Type.Missing);
    Marshal.FinalReleaseComObject(workbook);

    excelApp.Quit();
    Marshal.FinalReleaseComObject(excelApp);
}

Hope this helps!

Mike

I do it so:

        Excel.Application xlApp;
        Excel.Workbook xlWorkBook;
        Excel.Worksheet xlWorkSheet;
        xlApp = new Excel.ApplicationClass();
        xlWorkBook = xlApp.Workbooks.Add(System.Reflection.Missing.Value);
        xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1); 
        Excel.Hyperlink link =
            (Excel.Hyperlink)
            xlWorkSheet.Hyperlinks.Add(xlWorkSheet.get_Range("L500", Type.Missing), "#Sheet1!B1", Type.Missing,
                                       "Go top",
                                       "UP");

        xlWorkSheet.Hyperlinks.Add(xlWorkSheet.get_Range("C5", Type.Missing), "www.google.com", Type.Missing, "Click me to go to Google ","Google.com");                                                     
        xlApp.Visible = true;

It is important to insert the symbol # in the link that leads to a cell inside the book, if this symbol is not inserted, then the link is broken.

I described this decision in an article in Russian language, an example can be found here