C # The difference between Com and InteropExcel is referenced directly when Excel is operated.

Both are based on MicroSoft Excel11.0, that is, Office2003.
However, when you call a method to open an Excel file, it is slightly different. If COM is referenced directly, the syntax is as follows: Code
1 Excel. Application xlApp = null;
2 xlApp = new Excel. Application ();
3 xlApp. Visible = true;
4 Excel. Workbook xlWb = null;
5 try
6 {
7 xlWb = xlApp. Workbooks. Open (this. _ filename, Missing. Value, Missing. Value,
8 Missing. Value,
9 Missing. Value,
10 Missing. Value,
11 Missing. Value, Missing. Value, Missing. Value );
12
13

However, if InteropExcel is referenced, the syntax is as follows: Code
1 xlWb = xlApp. Workbooks. Add (this. _ filename );

I don't know the differences between the two, but they can only be used in this way. Later, the methods used to call WorkSheet are the same.