将项目添加到现有的Excel文件

我有问题。 我需要一个程序创build一个新的Excel文件，并从我的应用程序添加项目。 如果文件存在，我需要添加下一个logging到现有的文件。

string Filetest = "C:\\Users\\Tom\\Documents\\File.xls"; Excel.Application oApp; Excel.Workbook obook; oApp = new Excel.Application(); obook = oApp.Workbooks.Add(); oSheet = (Excel.Worksheet)obook.Worksheets.get_Item(1); if (File.Exists(Filetest)) { } oSheet.Cells[i, 1] = comboBox1.Text; oSheet.Cells[i, 2] = comboBox4.Text; oSheet.Cells[i, 3] = textBox9.Text; oSheet.Cells[i, 4] = textBox5.Text; oSheet.Cells[i, 5] = maskedTextBox6.Text; oSheet.Cells[i, 6] = textBox1.Text; oSheet.Cells[i, 7] = textBox2.Text; oSheet.Cells[i, 8] = maskedTextBox1.Text; oSheet.Cells[i, 9] = textBox21.Text; oSheet.Cells[i, 10] = textBox12.Text; oSheet.Cells[i, 11] = textBox3.Text; oSheet.Cells[i, 12] = textBox23.Text; oSheet.Cells[i, 13] = maskedTextBox6.Text; oSheet.Cells[i, 14] = textBox6.Text; oSheet.Cells[i, 15] = textBox7.Text; oSheet.Cells[i, 16] = "034"; oSheet.Cells[i, 17] = comboBox3.Text; oSheet.Cells[i, 18] = DateTime.Today.ToShortDateString(); oSheet.Cells[1000, 1] = i; obook.SaveAs(Filetest); obook.Close(); oApp.Quit(); i++; 

我应该把什么放在这里？

 if (File.Exists(Filetest)) { } 

请帮忙:(谢谢你！

Answer 1

 string Filetest = "C:\\Users\\Tom\\Documents\\File.xls"; Excel.Application oApp; Excel.Workbook obook; oApp = new Excel.Application(); if (File.Exists(Filetest)) { obook = oApp.Workbooks.Open(Filetest); } else { obook = oApp.Workbooks.Add(); } var oSheet = (Excel.Worksheet)obook.Worksheets.get_Item(1); oSheet.Cells[i, 1] = comboBox1.Text; // etc obook.SaveAs(Filetest); obook.Close(); oApp.Quit(); 

Answer 2

我会颠倒你的逻辑。 试着搞清楚，如果你有一个现有的文件，或者如果你需要一个新的。 就像是：

  Excell.Application oApp ; if (File.Exists(Filetest)) { oApp = //lookup how to load an Excell app from a file } else{ oApp = new Excel.Application(); obook = oApp.Workbooks.Add(); } oSheet = (Excel.Worksheet)obook.Worksheets.get_Item(1); //continue with your logic to fill in the cells and save.