vb.net - .net - Sorting a Data Table -


how sort datatable using vb.net? i've read thread having same output. sorting data table how sort datatable

also, i've tried sample in microsoft still it's not sorting.

        dim locationtable new datatable("location")     ' add 2 columns     locationtable.columns.add("state")     locationtable.columns.add("zipcode")      ' add data      locationtable.rows.add("washington", "1")     locationtable.rows.add("california", "2")     locationtable.rows.add("hawaii", "3")     locationtable.rows.add("hawaii", "4")     locationtable.rows.add("hawaii", "5")     locationtable.rows.add("hawaii", "6")     locationtable.rows.add("hawaii", "7")     locationtable.rows.add("hawaii", "8")     locationtable.rows.add("hawaii", "9")     locationtable.rows.add("hawaii", "10")     locationtable.acceptchanges()      console.writeline("rows in original order" & vblf & " state " & vbtab & vbtab & " zipcode")     each row datarow in locationtable.rows         console.writeline(" {0} " & vbtab & " {1}", row("state"), row("zipcode"))     next      ' create dataview      dim view new dataview(locationtable)      ' sort state , zipcode column in descending order     view.sort = "zipcode asc"      console.writeline(vblf & "rows in sorted order" & vblf & " state " & vbtab & vbtab & " zipcode")     each row datarowview in view         console.writeline(" {0} " & vbtab & " {1}", row("state"), row("zipcode"))     next

the output rows in sorted order

state zipcode

washington 1

hawaii 10

california 2

hawaii 3

hawaii 4

hawaii 5

hawaii 6

hawaii 7

hawaii 8

hawaii 9

it should 1 ~ 10 right? :(

your zipcode column considered string, need specify coumn datatype int

try this

dim locationtable new datatable("location") ' add 2 columns locationtable.columns.add("state",type.gettype("system.string")) locationtable.columns.add("zipcode",type.gettype("system.int32")) ' add data  locationtable.rows.add("washington", 1) locationtable.rows.add("california", 2) locationtable.rows.add("hawaii", 3) locationtable.rows.add("hawaii", 4) locationtable.rows.add("hawaii", 5) locationtable.rows.add("hawaii", 6) locationtable.rows.add("hawaii", 7) locationtable.rows.add("hawaii", 8) locationtable.rows.add("hawaii", 9) locationtable.rows.add("hawaii", 10) locationtable.acceptchanges()  console.writeline("rows in original order" & vblf & " state " & vbtab & vbtab & " zipcode") each row datarow in locationtable.rows     console.writeline(" {0} " & vbtab & " {1}", row("state"), row("zipcode")) next  ' create dataview  dim view new dataview(locationtable)  ' sort state , zipcode column in descending order view.sort = "zipcode asc"  console.writeline(vblf & "rows in sorted order" & vblf & " state " & vbtab & vbtab & " zipcode") each row datarowview in view     console.writeline(" {0} " & vbtab & " {1}", row("state"), row("zipcode")) next

f use dataset...check 

if dataset isnot nothing amdalso dataset.tables(0).rows.count>0  // code here end if

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