命名空间:Microsoft.Office.Interop.Excel
a. 创建Excel实例
Application excel = new Application();b. 打开已有的一个workbook
Workbook workbook = excel.Workbooks.Open(FilePath, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);我查了资料Application是接口,怎么还可以实例化呀?
a. 创建Excel实例
Application excel = new Application();b. 打开已有的一个workbook
Workbook workbook = excel.Workbooks.Open(FilePath, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);我查了资料Application是接口,怎么还可以实例化呀?
bool fileSaved = false;
SaveFileDialog sfd = new SaveFileDialog();
sfd.DefaultExt = "xls";
sfd.Filter = "*.excel|*.xls";
sfd.FileName = "TimTest";
sfd.ShowDialog();
saveFileName = sfd.FileName;
if (saveFileName.IndexOf(':') < 0) return;
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
if (excel == null) return;
Microsoft.Office.Interop.Excel.Workbooks wbList = excel.Workbooks;
Microsoft.Office.Interop.Excel.Workbook wb = wbList.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
Microsoft.Office.Interop.Excel.Worksheet wsheet = (Microsoft.Office.Interop.Excel.Worksheet)wb.Worksheets[1];
DataTable dt = DBHelper.GetData();
for (int i = 0; i < dt.Columns.Count; i++)
{
wsheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
}
for (int r = 0; r < dt.Rows.Count; r++)
{
for (int i = 0; i < dt.Columns.Count; i++)
{
wsheet.Cells[r + 2, i + 1] = dt.Rows[r][i];
}
System.Windows.Forms.Application.DoEvents();
}
wsheet.Columns.EntireColumn.AutoFit();
Microsoft.Office.Interop.Excel.Range rg = wsheet.get_Range(wsheet.Cells[2, 2], wsheet.Cells[dt.Rows.Count + 1, 2]);
rg.NumberFormat = "00000000";
if (saveFileName != "")
{
try
{
wb.Saved = true;
wb.SaveCopyAs(saveFileName);
fileSaved = true;
}
catch (Exception ex)
{
fileSaved = false;
MessageBox.Show("导出文件时出错,文件可能正被打开!\n" + ex.Message);
}
}
else
{
fileSaved = false;
}
excel.Quit();
GC.Collect();
if (fileSaved && System.IO.File.Exists(saveFileName))
{
System.Diagnostics.Process.Start(saveFileName);
}要添加Microsoft 里面的excel引用
{
[Guid("000208D5-0000-0000-C000-000000000046")]
[CoClass(typeof(ApplicationClass))]
public interface Application : _Application, AppEvents_Event
{
}
}看到没有,实际上你调用new实例化,是用的ApplicationClass这个类在实例化,这是方便你书写而已。
[Guid("000208D5-0000-0000-C000-000000000046")]
public interface Application : _Application, AppEvents_Event
{
}
如上这个接口有GUID和CoClass属性修饰,因此代码
application= new Excel.Application();
会被翻译成
application= new Excel.ApplicationClass();