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59 lines
1.7 KiB
C#
59 lines
1.7 KiB
C#
9 months ago
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace BarcodeLib.Symbologies
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{
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/// <summary>
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/// ISBN encoding
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/// Written by: Brad Barnhill
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/// </summary>
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class ISBN : BarcodeCommon, IBarcode
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{
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public ISBN(string input)
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{
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Raw_Data = input;
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}
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/// <summary>
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/// Encode the raw data using the Bookland/ISBN algorithm.
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/// </summary>
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private string Encode_ISBN_Bookland()
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{
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if (!CheckNumericOnly(Raw_Data))
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Error("EBOOKLANDISBN-1: Numeric Data Only");
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string type = "UNKNOWN";
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if (Raw_Data.Length == 10 || Raw_Data.Length == 9)
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{
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if (Raw_Data.Length == 10) Raw_Data = Raw_Data.Remove(9, 1);
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Raw_Data = "978" + Raw_Data;
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type = "ISBN";
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}//if
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else if (Raw_Data.Length == 12 && Raw_Data.StartsWith("978"))
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{
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type = "BOOKLAND-NOCHECKDIGIT";
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}//else if
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else if (Raw_Data.Length == 13 && Raw_Data.StartsWith("978"))
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{
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type = "BOOKLAND-CHECKDIGIT";
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Raw_Data = Raw_Data.Remove(12, 1);
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}//else if
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//check to see if its an unknown type
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if (type == "UNKNOWN") Error("EBOOKLANDISBN-2: Invalid input. Must start with 978 and be length must be 9, 10, 12, 13 characters.");
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EAN13 ean13 = new EAN13(Raw_Data);
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return ean13.Encoded_Value;
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}//Encode_ISBN_Bookland
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#region IBarcode Members
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public string Encoded_Value
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{
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get { return Encode_ISBN_Bookland(); }
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}
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#endregion
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}
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}
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