I have an Excel file and a data table that I need to add to it. However, the table’s columns don’t directly match those in the Excel file, so they need to be reordered. For example, column E of the data table needs to be placed in column B of the Excel file, and so on for other columns.
How can I do this?
you can rearrange the columns in datatable if you know the order of the excel columns
dt = dt.DefaultView.ToTable({"Col1","Col2"},False)
Col1,Col2 etc are the columns you can add all columns in the order you need
cheers
Hii @Sowjanya_N1
Create a new DataTable with columns arranged in the same order as the Excel file. Then populate this table from the original DataTable by mapping columns to the required positions, for example taking column E into column B, and so on. After reordering in memory, write the new DataTable to Excel using a single Write Range.
you can use the following expression with column names in order you need
use assign with
dt = dt.DefaultView.ToTable(false,{“Col1”,“Col2”,“Col3”})
{“Col1”,“Col2,Col3”} - here you can specify the column names you need and in the order you need so that the columns are re arranged in datatable
You can below linq as well.
dt = dt.AsEnumerable().
Select(Function(r) New Object(){r(“ColE”), r(“ColA”), r(“ColC”)}).
CopyToDataTable()
Mark as solution if it helps.
Why we have to use false parameter.
ToTable(distinct As Boolean, ParamArray columnNames As String())
False means keeps all rows, including duplicates
True means returns only distinct rows based on the selected columns
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