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Ability to override default field comparer used in DapperTable (EX: e… #716

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Ability to override default field comparer used in DapperTable (EX: e… #716

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13 changes: 12 additions & 1 deletion Dapper/SqlMapper.DapperTable.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,17 @@ namespace Dapper
{
partial class SqlMapper
{
private static IEqualityComparer<string> DefaultFieldNameComparer = StringComparer.Ordinal;

/// <summary>
/// Ability to override default field comparer (EX: enable case insensitive comparison)
/// </summary>
/// <param name="comparer"></param>
public static void SetFieldNameComparer(IEqualityComparer<string> comparer)
{
DefaultFieldNameComparer = comparer;
}

private sealed class DapperTable
{
string[] fieldNames;
Expand All @@ -17,7 +28,7 @@ public DapperTable(string[] fieldNames)
if (fieldNames == null) throw new ArgumentNullException(nameof(fieldNames));
this.fieldNames = fieldNames;

fieldNameLookup = new Dictionary<string, int>(fieldNames.Length, StringComparer.Ordinal);
fieldNameLookup = new Dictionary<string, int>(fieldNames.Length, DefaultFieldNameComparer);
// if there are dups, we want the **first** key to be the "winner" - so iterate backwards
for (int i = fieldNames.Length - 1; i >= 0; i--)
{
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