c# - How to add values, containing double quotes, from DataTable rows values to Excel cells formulas? -


i'm newbie in c#. tried insert strings datatable excel cells formulas, unsuccesfully. example, have

=round(r[-2]c*if(r[-1]c="";r[-1]c17;r[-1]c)/(if(r[-1]c="";r[-1]c17;r[-1]c));2)

as value. tried make

=round(r[-2]c*if(r[-1]c=\"\";r[-1]c17;r[-1]c)/(if(r[-1]c=\"\";r[-1]c17;r[-1]c));2)

but got exception hresult: 0x800a03ec in last example debugger shows proper string, got exception.

also, works, when put code:

globals.wirksheet1.cells.range["a100"].value2 = @"=round(r[-2]c*if(r[-1]c="""",r[-1]c17,r[-1]c)/(if(r[-1]c="""",r[-1]c17,r[-1]c)),2)";

but need values datatable, don't know how add @ string. please, explain me how solve problem? thanks

for sake of answer.

op has stated:

i changed values in table data

=round(r[-2]c*if(r[-1]c=concatenate(char(34),char(34)),r[-1]c17,r[-1]c)/(if(r[-1‌​]c=concatenate(char(34),char(34)),r[-1]c17,r[-1]c)),2)


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