ecommerce web developer development freelance website designer India
Compare Two Files to Determine if They are Identical

This function will allow you to compare one file to another. It will do either a lax check
(compare file lengths only) or a stringent check (a byte by byte comparison).
See comments for more details

Public Function AreTheyTheSame(ByVal File1 As String, _
ByVal File2 As String, Optional StringentCheck As _
Boolean = False) As Boolean
'**********************************************************
'PURPOSE: Check to see if two files are identical
'File1 and File2 = FullPaths of files to compare
'StringentCheck (optional): If false (default),
'will only compare file lengths. If true, a
'byte by byte comparison is conducted if file lengths are
'equal
'**********************************************************

On Error GoTo ErrorHandler

If Dir(File1) = "" Then Exit Function
If Dir(File2) = "" Then Exit Function

Dim lLen1 As Long, lLen2 As Long
Dim iFileNum1 As Integer
Dim iFileNum2 As Integer
Dim bytArr1() As Byte, bytArr2() As Byte
Dim lCtr As Long, lStart As Long
Dim bAns As Boolean

lLen1 = FileLen(File1)
lLen2 = FileLen(File2)
If lLen1 <> lLen2 Then
Exit Function
ElseIf StringentCheck = False Then
AreTheyTheSame = True
Exit Function
Else
iFileNum1 = FreeFile
Open File1 For Binary Access Read As #iFileNum1
iFileNum2 = FreeFile
Open File2 For Binary Access Read As #iFileNum2

'put contents of both into byte Array
bytArr1() = InputB(LOF(iFileNum1), #iFileNum1)
bytArr2() = InputB(LOF(iFileNum2), #iFileNum2)
lLen1 = UBound(bytArr1)
lStart = LBound(bytArr1)

bAns = True
For lCtr = lStart To lLen1
If bytArr1(lCtr) <> bytArr2(lCtr) Then
bAns = False
Exit For
End If

Next
AreTheyTheSame = bAns

End If

ErrorHandler:
If iFileNum1 > 0 Then Close #iFileNum1
If iFileNum2 > 0 Then Close #iFileNum2
End Function
 Compare Two Files to Determine if They are Identic

901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050

Express News India | Freelance ecommerce web development India