连接Excel库代码

System.Data.OleDb.OleDbConnection 
con1=new System.Data.OleDb.OleDbConnection();  
string constr="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C://test2.xls;Extended Properties=Excel 8.0;"; 
con1.ConnectionString=constr;  
con1.Open(); 
System.Data.OleDb.OleDbCommand com1=new System.Data.OleDb.OleDbCommand();  
com1.CommandText="SELECT ww1 FROM [Sheet1$] ";  
com1.Connection=con1;  
System.Data.OleDb.OleDbDataAdapter ap=new System.Data.OleDb.OleDbDataAdapter(com1);   
ap.Fill(ds);    
this.DataGrid1.DataSource=ds;    
this.DataGrid1.DataBind();