出以下的错误:
System.Data.OleDb.OleDbException: 找不到可安装的 ISAM。
at System.Data.OleDb.OleDbConnection.ProcessResults(Int32 hr)
at System.Data.OleDb.OleDbConnection.InitializeProvider()
at System.Data.OleDb.OleDbConnection.Open()
at ExcelTest1.Form1.Excel_Click(Object sender, EventArgs e) in c:\documents and settings\administrator\my documents\visual studio projects\exceltest1\exceltest1\form1.cs:line 505