VBA check for value in a range - vba

Question

I am trying to loop through a column and if cells = "what i'm lookng for" then do something.
I have this so far, where I'm off is in the if statement where I check for the "name":
Option Explicit
Sub test()
Dim wksDest As Worksheet
Dim wksSource As Worksheet
Dim rngSource As Range
Dim name As String
Dim LastRow As Long
Dim LastCol As Long
Dim c As Long
Application.ScreenUpdating = False
Set wksSource = Worksheets("Sheet1")
With wksSource
LastCol = .Cells(1, .Columns.Count).End(xlToLeft).Column
For c = 16 To 20
LastRow = .Cells(.Rows.Count, c).End(xlUp).Row
Set rngSource = .Range(.Cells(5, 16), .Cells(LastRow, 16))
name = rngSource.Value
If name = "mark"
do something
End If
Next c
End With
Application.ScreenUpdating = True
'MsgBox "Done!", vbExclamation
End Sub

Answer 1

OK Chris
Maybe a bit of simplification is required but also a few assumptions.
It doesn't seem like LastCol is being used for anything - so let's assume this is the Column you want to loop through.
Your loop has fixed start and end values yet you are determining the LastRow - so let's assume you want to start from row 5 (in your code) and loop to the LastRow in the LastCol.
In order to determine LastCol you must have data in the row you are using to do this - so let's assume that there are values in row 1 in all columns up to column you want to loop say 16 (in your code).
If you want to (IF) test for a single (string) value in this case then you must arrange for your rngSource to be a single cell value. You also don't need to assign this to a variable unless you need to use it again.
Finally, if you want to check for other values you may want to consider using a SELECT CASE structure in place of your IF THEN structure.
Have a look at the following and change my assumptions to meet your requirement - good luck.
Sub test()
Dim wksDest As Worksheet
Dim wksSource As Worksheet
Dim rngSource As Range
Dim name As String
Dim LastRow As Long
Dim LastCol As Long
Dim c As Long
Application.ScreenUpdating = False
Set wksSource = Worksheets("Sheet1")
With wksSource
LastCol = .Cells(1, .Columns.Count).End(xlToLeft).Column
LastRow = .Cells(Rows.Count, LastCol).End(xlUp).Row
FirstRow = 5
For c = FirstRow To LastRow
If .Range(.Cells(c, LastCol), .Cells(c, LastCol)).Value = "Mark" Then
MsgBox ("do something")
End If
Next c
End With
End Sub

Answer 2

You can just do that with one line.
If Not IsError(Application.Match(ValueToSearchFor, RangeToSearchIn, 0)) Then
'The value found in the given range
End If
Example:
Search for "Canada" in column C of sheet named "Country"
If Not IsError(Application.Match("Canada", Sheets("Country").Range("C:C"), 0)) Then
'The value found in the given range
End If

Answer 3

Pass value to find and Column where value need to be checked. It will return row num if its found else return 0.
Function checkForValue(FindString As String,ColumnToCheck as String) As Long
SheetLastRow = Sheets("Sheet1").Cells.Find(What:="*", SearchOrder:=xlRows, SearchDirection:=xlPrevious, LookIn:=xlValues).row
With Sheets("Sheet1").Range("$" & ColumnToCheck & "$1:$" & ColumnToCheck & "$" & CStr(SheetLastRow) )
Set rng = .Find(What:=FindString, _
After:=.Cells(.Cells.Count), _
LookIn:=xlValues, _
lookat:=xlWhole, _
SearchOrder:=xlByRows, _
SearchDirection:=xlNext, _
MatchCase:=False)
If Not rng Is Nothing Then
checkForValue = rng.row 'return row its found
'write code you want.
Else
checkForValue = 0
End If
End With
End Function

Answer 4

I tried Hari's suggestion, but Application.Match works weird on range names (not recognizing them...)
Changed to: WorksheetFunction.Match(...
It works, but when value is not present A runtime ERROR jumps before IsError(...) is evaluated.
So I had to write a simple -no looping- solution:
dim Index as Long
Index = -1
On Error Resume Next
Index = WorksheetFunction.Match(Target,Range("Edificios"), 0) 'look for Target value in range named: Edificios
On Error GoTo 0
If Index > 0 Then
' code for existing value found in Range # Index row
End If
Remeber Excel functions first index = 1 (no zero based)
Hope this helps.

Answer 5

I'm guessing what you really want to do is loop through your range rngSource. So try
Set rngSource = .Range(.Cells(5, 16), .Cells(LastRow, 16))
for myCell in rngSource
if myCell.Value = "mark" then
do something
end if
next myCell