vb.net office excel 和wps共存，创建正确的excel对象以便操作excel表格

vb6.0版代码请看vb6.0分类下另外一篇文章

代码实现平台：

vs2015+4.0运行库

Log函数为自编函数，代码为给出，请谅解。

    ''' <summary>
    '''office97              8.0
    '''office2000             9.0
    '''officeXP (2002)        10.0
    '''office2003             11.0
    '''office2007             12.0
    '''office2010             14.0
    '''根据系统安装的Excel（Excel或者wps）创建Excel对象
	''' 一定要先et 然后在ket 最后才是excel
	''' 在系统中，office excel 比wps 表格具有优先级或者是注册表里面某项决定的
    ''' </summary>
    ''' <param name="xlApp"></param>
    ''' <param name="ISAM">索引顺序访问方法</param>
    ''' <param name="filter">文件后缀</param>
    ''' <returns></returns>
    Private Function CreateExcelObject(ByRef xlApp As Object,ByRef ISAM As String,ByRef filter As String) As Boolean
        Dim xlappVersion As Double = 0.0
        Dim funcResult As Boolean = False

        Try
            xlApp = CreateObject("ET.Application")
        Catch ex As Exception
            Debug.Print($"错误代码：{Err.Number}{Environment.NewLine}错误描述：{Err.Description}")
            Debug.Print($"问题描述：{Environment.NewLine}{ex.Message}{Environment.NewLine}具体信息：{Environment.NewLine}{ex.StackTrace}")
            Log($"问题描述：{Environment.NewLine}{ex.Message}{Environment.NewLine}具体信息：{Environment.NewLine}{ex.StackTrace}")
        End Try
        If xlApp Is nothing Then
            Try
                xlApp = CreateObject("KET.Application")
            Catch ex As Exception
                Debug.Print($"错误代码：{Err.Number}{Environment.NewLine}错误描述：{Err.Description}")
                Debug.Print($"问题描述：{Environment.NewLine}{ex.Message}{Environment.NewLine}具体信息：{Environment.NewLine}{ex.StackTrace}")
                Log($"问题描述：{Environment.NewLine}{ex.Message}{Environment.NewLine}具体信息：{Environment.NewLine}{ex.StackTrace}")
            End Try
        End If
        If xlApp Is nothing Then
            Try
                xlApp = CreateObject("Excel.Application")
            Catch ex As Exception
                Debug.Print($"错误代码：{Err.Number}{Environment.NewLine}错误描述：{Err.Description}")
                Debug.Print($"问题描述：{Environment.NewLine}{ex.Message}{Environment.NewLine}具体信息：{Environment.NewLine}{ex.StackTrace}")
                Log($"问题描述：{Environment.NewLine}{ex.Message}{Environment.NewLine}具体信息：{Environment.NewLine}{ex.StackTrace}")
            End Try
        End If
        If xlApp Is nothing Then
            Debug.Print($"来源：{New StackTrace().GetFrame(0).getmethod.Name} 获取Excel或者WPS对象失败")
            Return funcResult
        End If

        xlApp.Visible = False
        xlappVersion = Convert.Todouble(xlApp.version)
        Select Case xlappVersion
            Case <= 11.0#
                filter = ".xls"
                ISAM = "Excel 8.0"
                funcResult = True
            Case > 11.0#
                filter = ".xlsx"
                ISAM = "Excel 12.0 Xml"
                funcResult = True
            Case Else
                Debug.Print($"来源：{New StackTrace().GetFrame(0).getmethod.Name} 获取Excel或者WPS对象失败")
        End Select
        Debug.Print($"来源：{New StackTrace().GetFrame(0).getmethod.Name} 获取Excel或者WPS对象成功")
        Return funcResult
    End Function

调用

 Dim xlApp As Object = nothing
 Dim excelFilter As String = ""
 Dim excelISAM As String = ""

	'后期绑定Excel对象 不需要知道系统安装的是哪个版本的Excel
        '不需要引用Excel
        If CreateExcelObject(xlApp,excelISAM,excelFilter) = False Then
            MessageBox.Show("本机未安装Excel或者WPS，导出失败！","温馨提示",MessageBoxButtons.OK,MessageBoxIcon.information)
            Exit Sub
        End If