Public Overridable Sub Open(ByVal fileName As String)
{signature}
{parameters}
{param:templateFileName}The complete path and file name of the template Excel file.
{param}
{exceptions}
{exception:ArgumentNullException}[Open|ExcelTemplate.Open] will throw this exception if {{null}} \(C\#\) or {{Nothing}} \(VB.NET\) is passed to the method.
{exception}
{exception:ArgumentException}
{exception}
{remarks}If your template file is the new Office Open XML \(.xlsx\) format, you can pass it into the [Open|ExcelTemplate.Open] method just as you would a BIFF8 \(.xls\) Excel file. You will need to remember to give the output file a ".xlsx" extension when you call [Save|ExcelTemplate.Save], as ExcelWriter cannot convert .xlsx files to .xls.
{remarks}
{example}{code:csharp|title=C#} |