privatevoid button1_Click(object sender, EventArgs e) 
{ 
 Excel.Application excel = 
 new Excel.Application(); //引用Excel对象 
 Excel.Workbook book = 
 excel.Application.Workbooks.Add("c:\\test.xls"); 
 //引用Excel工作簿 
 excel.Visible = true; //使Excel可视 
} 

privatevoid button1_Click(object sender, EventArgs e) 
{ 
 System.Diagnostics.Process.Start("c:\\test.xls"); 
} 

private void button1_Click(object sender, EventArgs e)    

{      

Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();      

Workbook wkb = app.Workbooks.Add(@"E:\Work\DemoBase_091111\CSharpOpenExcel\cshapropenexcel.xlsx"); 

//打开已经存在的excel,      

//而通过gdal打开已经存在的shp,方法为      

// OSGeo.GDAL.Gdal.AllRegister();       

// OSGeo.GDAL.Dataset dataSet = OSGeo.GDAL.Gdal.Open(@"E:\Work\DemoBase_091111\GDALTEST\testshapefile\point_out.shp", Access.GA_ReadOnly);       

//二者是差不多的，一个用add方法，一个用open方法，都得到了可以进行下一步操作的文件，技术具有相同性     

  app.Visible = true;    

}