Know the Last column of the table

Question

Hello 
i use vb.net with excel
I have a table
with a spreadsheet, I want to know the Last
column of the table 
please help me ??

Answer 1

i have a table in Excel file and i want to add the last column of this table in datagridview 
i want to set ShtRange to give me the last column 
i use this but don't give me a result 
With Form1.xlWorkSheet
Dim ShtRange As Range
Dim dt As New System.Data.DataTable
ShtRange = Form1.xlWorkSheet.Cells(1, Form1.xlWorkSheet.Columns.Count).End(XlDirection.xlToLeft)
For Cnum As Integer = 1 To ShtRange.Columns.Count
dt.Columns.Add(New DataColumn(TryCast(ShtRange.Cells(1, Cnum), Excel.Range).Value.ToString()))
Next
dt.AcceptChanges()
Dim columnNames As String() = New String(dt.Columns.Count - 1) {}
For i As Integer = 0 To dt.Columns.Count - 1
columnNames(0) = dt.Columns(i).ColumnName
Next
For Rnum As Integer = 2 To ShtRange.Rows.Count
Dim dr As DataRow = dt.NewRow()
For Cnum As Integer = 1 To ShtRange.Columns.Count
If TryCast(ShtRange.Cells(Rnum, Cnum), Excel.Range).Value2 IsNot Nothing Then
dr(Cnum - 1) = TryCast(ShtRange.Cells(Rnum, Cnum), Excel.Range).Value2.ToString()
End If
Next
dt.Rows.Add(dr)
dt.AcceptChanges()
Next
Me.DataGridView1.DataSource = dt
End With
this is my table :