From 14c0dc63c74194531018ea31b9267399b3c80825 Mon Sep 17 00:00:00 2001
From: Milan Figuric <figuric@gmail.com>
Date: Tue, 20 Oct 2015 19:34:00 +0200
Subject: [PATCH] Add Regex Pattern for CSV Column

---
 LINQtoCSV/CsvColumnAttribute.cs |  1 +
 LINQtoCSV/FieldMapper.cs        | 10 +++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/LINQtoCSV/CsvColumnAttribute.cs b/LINQtoCSV/CsvColumnAttribute.cs
index a1c259d..297261f 100644
--- a/LINQtoCSV/CsvColumnAttribute.cs
+++ b/LINQtoCSV/CsvColumnAttribute.cs
@@ -21,6 +21,7 @@ public class CsvColumnAttribute : System.Attribute
         public NumberStyles NumberStyle { get; set; }
         public string OutputFormat { get; set; }
         public int CharLength { get; set; }
+        public string RegexPattern { get; set; }
 
         public CsvColumnAttribute()
         {
diff --git a/LINQtoCSV/FieldMapper.cs b/LINQtoCSV/FieldMapper.cs
index 9ef9dfc..a1be7f3 100644
--- a/LINQtoCSV/FieldMapper.cs
+++ b/LINQtoCSV/FieldMapper.cs
@@ -4,6 +4,7 @@
 using System.ComponentModel;
 using System.Linq;
 using System.Reflection;
+using System.Text.RegularExpressions;
 
 namespace LINQtoCSV
 {
@@ -32,6 +33,7 @@ protected class TypeFieldInfo : IComparable<TypeFieldInfo>
             public MethodInfo parseNumberMethod = null;
             public MethodInfo parseExactMethod;
             public int charLength = 0;
+            public string RegexPattern { get; set; }
 
             // ----
 
@@ -131,7 +133,7 @@ private TypeFieldInfo AnalyzeTypeField(
                 {
                     tfi.name = cca.Name;
                 }
-
+                tfi.RegexPattern = cca.RegexPattern;
                 tfi.index = cca.FieldIndex;
                 tfi.hasColumnAttribute = true;
                 tfi.canBeNull = cca.CanBeNull;
@@ -545,6 +547,12 @@ public T ReadObject(IDataRow row, AggregatedException ae) {
                 {
                     try
                     {
+                        if (tfi.RegexPattern != null && !Regex.IsMatch(value, tfi.RegexPattern))
+                        {
+                            throw new WrongDataFormatException(typeof(T).ToString(), tfi.name, value, row[i].LineNbr, m_fileName, null);
+                        }
+
+
                         Object objValue = null;
 
                         // Normally, either tfi.typeConverter is not null,