VB.Net互操作的Excel COM异常

Question

此代码相当长一段时间到现在正在完善，

它抛出异常：

System.InvalidCastException：无法投 类型的COM对象“系统.__ ComObject”类型 'Microsoft.Office.Interop.Excel.WorksheetClass'

Dim ds_allJobs As DataSet = DBHandling.searchJob("", "", "all open jobs") 
Dim xlApp = New Microsoft.Office.Interop.Excel.Application 

xlApp.Visible = False 
xlApp.ScreenUpdating = False 

Dim xlWorkbook = xlApp.Workbooks.Add(XlWBATemplate.xlWBATWorksheet) 
Dim xlWorksheet = New Microsoft.Office.Interop.Excel.Worksheet 

xlWorksheet = xlWorkbook.ActiveSheet 'IT FAILS HERE 
xlWorksheet.Name = "Open Jobs"  

不限suggestio NS？

Answer 1

如果你指定的对象类型（例如exWorkbook As Excel.Workbook）

这是一种方法，使一个新的工作表中最好是：

'create a new excel application (window) 
Dim exApp As New Excel.Application 
'add a workbook to it, and take a look at the first worksheet 
Dim exWorkbook As Excel.Workbook = exApp.Application.Workbooks.Add() 
'create a new worksheet 
Dim exWorksheet As Excel.Worksheet 
'add this worksheet to the current applicatoin 
exWorksheet = CType(exApp.Worksheets.Add(), Excel.Worksheet) 

李四这个回答你的问题？最后一行是将对象转换为输入工作表。