DataTable How to get item value with row name and column name VB

Question

I have a simple DataTable where one of the columns contains unique values  For example   ColumnName1   ColumnName2 value1        35 value2        44 value3        10   Because I know that value 1  2 and 3 will always be different one from another  I would like to get a value of this table only using ColumnName2 and one of the values of ColumnName1  That would for example be   searchedValue   DataTable Rows  value3   Item  ColumnName2    result would be 10   I tried the following examples unsuccessfully    with the DataTable Select method  returns an array of rows  but I only need one with the DataTable Rows IndexOf method  if I understood well  I need to provide the whole row contents for it to be found with this method

User · Accepted Answer

Dim rows   AS DataRow   DataTable Select  ColumnName1    value3    If rows Count  gt  0 Then      searchedValue   rows 0  Item  ColumnName2    End If   With FirstOrDefault   Dim row AS DataRow   DataTable Select  ColumnName1    value3    FirstOrDefault   If Not row Is Nothing Then      searchedValue   row Item  ColumnName2    End If   In C    var row   DataTable Select  ColumnName1    value3    FirstOrDefault    if  row    null       searchedValue   row  ColumnName2

User · Answer

For i   0 To dt Rows Count - 1      ListV Items Add dt Rows i  Item  quot STU NUMBER quot   ToString      ListV Items i  SubItems Add dt Rows i  Item  quot FNAME quot   ToString  amp   quot   quot   amp  dt Rows i  Item  quot MI quot   ToString  amp   quot    quot   amp  dt Rows i  Item  quot LNAME quot   ToString      ListV Items i  SubItems Add dt Rows i  Item  quot SEX quot   ToString   Next

User · Answer

Create a class to hold the pair             Public Class ColumnValue             Public ColumnName As String             Public ColumnValue As New Object         End Class       Build the pair             For Each row In  YourDataTable  Rows                For Each item As DataColumn In row Table Columns                 Dim rowValue As New ColumnValue                 rowValue ColumnName   item Caption                 rowValue ColumnValue   row item item Ordinal                  RowValues Add rowValue                  rowValue   Nothing               Next            Now you can grab the value by the column name             Dim results    From p In RowValues Where p ColumnName    MyColumn  Select  p ColumnValue  FirstOrDefault              Next

User · Answer

Try   DataTable Rows RowNo  ItemArray columnIndex  ToString      This is C  code  Change this to VB equivalent

[vb.net] DataTable: How to get item value with row name and column name? (VB)

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