编程的逻辑能力你已经有了，但是有一些常识错误，要是花点时间看过两遍帮助，你可以成为高手。
Dim ckl As WinForm.CheckedListBox = e.Form.Controls("CheckedListBox1")
If ckl.CheckedIndices.count = 0 Then
MessageBox.Show("至少要选择一个供应商","提示",MessageBoxButtons.OK,MessageBoxIcon.Information)
Return
End If
Dim nms As String
For Each i As Integer In ckl.CheckedIndices '获取已经勾选的
nms = nms & ",'" & ckl.Items(i) & "'"
Next
nms = nms.Trim(",")
'生成Excel表
Dim dt As DataTable = DataTables("表A")
Dim nm() As String = {"供应商","产品","规格","合计"} '要导出的列名
Dim caps() As String = {"供应商","产品名称","规格/型号","合计金额"} '对应的列标题
Dim szs() As Integer = {150,180,120,85} '对应的列宽
Dim Book As New XLS.Book '定义一个Excel工作簿
Dim Sheet As XLS.Sheet = Book.Sheets(0) '引用工作簿的第一个工作表
For c As Integer = 0 To nm.length -1
Sheet(1, c).Value = caps(c) '指定列标题
Sheet.Cols(c).Width = szs(c) '指定列宽
Next
Sheet(0, 1).Value = e.Form.Controls("ComboBox1").value
Dim drs As List(of DataRow) = dt.Select("供应商='" & e.Form.Controls("ComboBox1").value & "' And 产品 in (" & nms & ")")
For r As Integer = 0 To drs.count -1 '填入数据
For i As Integer = 0 To nm.length -1
Sheet(r + 2, i).Value = drs(r)(nm(i))
Next
Next
'保存并打开excel文件
Book.Save("d:\test.xls")
Dim Proc As New Process
Proc.File = "d:\test.xls"
Proc.Start()
e.Form().Close
[此贴子已经被作者于2016/10/24 8:13:26编辑过]
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Post By：2016/10/23 23:21:00 [只看该作者]
，完美解决，谢谢！