为什么需要VSTO？据我所知,VSTO用于Office加载项.但是,由于您希望在DataGridView中显示数据,我假设您有一个WinForms应用程序应该只是访问一个工作簿.在这种情况下,您可以使用Office Interop简单地打开工作簿.只需将Microsoft.Office.Interop.Excel的引用添加到您的项目中,并使用Microsoft.Office.Interop.Excel添加;声明.

Excel Interop的MSDN参考文档可以在这里找到：http://msdn.microsoft.com/en-us/library/ms262200%28v=office.14%29.aspx

我会给你的Excel部分,也许别人可以做其余的.

首先,打开Excel和工作簿：

Application app = new Application();
// Optional,but recommended if the user shouldn't see Excel.
app.Visible = false;
app.ScreenUpdating = false;
// AddToMru parameter is optional,but recommended in automation scenarios.
Workbook workbook = app.Workbooks.Open(filepath,AddToMru: false);

然后以某种方式获取正确的工作表.你有几个可能性：

// Active sheet (should be the one which was active the last time the workbook was saved).
Worksheet sheet = workbook.ActiveSheet;
// First sheet (notice that the first is actually 1 and not 0).
Worksheet sheet = workbook.Worksheets[1];
// Specific sheet.
// Caution: Default sheet names differ for different localized versions of Excel.
Worksheet sheet = workbook.Worksheets["Sheet1"];

然后得到正确的范围.您没有指定如何知道所需数据的位置,所以我认为它是固定的列.

// If you also know the row count.
Range range = sheet.Range["A1","D20"];
// If you want to get all rows until the last one that has some data.
Range lastUsedCell = sheet.Cells.SpecialCells(XlCellType.xlCellTypeLastCell);
string columnName = "D" + lastUsedCell.Row;
Range range = sheet.Range["A1",columnName];

获取值：

// Possible types of the return value:
// If a single cell is in the range: Different types depending on the cell content
// (string,DateTime,double,...)
// If multiple cells are in the range: Two dimensional array that exactly represents
// the range from Excel and also has different types in its elements depending on the
// value of the Excel cell (should always be that one in your case)
object[,] values = range.Value;

然后可以将该二维对象数组用作DataGridView的数据源.我没有使用WinForms多年,所以我不知道你是否可以直接绑定,或者首先需要获取数据到一些特定的格式.

最后再次关闭Excel：

workbook.Close(SaveChanges: false);
workbook = null;
app.Quit();
app = null;
// Yes,we really want to call those two methods twice to make sure all
// COM objects AND all RCWs are collected.
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
GC.WaitForPendingFinalizers();

使用Interop后正确关闭Excel是一项任务,因为您必须确保所有对COM对象的引用已经被释放.我找到的最简单的方法是进行所有的工作,除了打开和关闭Excel和工作簿(所以我的第一个和最后一个代码块)在一个单独的方法.这样可以确保在调用Quit时,该方法中使用的所有COM对象都超出了范围.