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Added null check to string parameter on BaseEmitter Print method #195

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Added null check to string parameter on BaseEmitter Print method #195

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6 changes: 5 additions & 1 deletion ESCPOS_NET/Emitters/BaseCommandEmitter/PrintCommands.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
using System.Linq;
using System;
using System.Linq;
using ESCPOS_NET.Emitters.BaseCommandValues;

namespace ESCPOS_NET.Emitters
Expand All @@ -8,6 +9,9 @@ public abstract partial class BaseCommandEmitter : ICommandEmitter
/* Printing Commands */
public virtual byte[] Print(string data)
{
if (data == null)
throw new ArgumentNullException(nameof(data));

// Fix OSX or Windows-style newlines
data = data.Replace("\r\n", "\n");
data = data.Replace("\r", "\n");
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