添加项目文件。

ExportExcelTest/SimpleNumberConverter.cs

@@ -0,0 +1,69 @@
+using System.Collections.Generic;
+
+
+/// <summary>
+/// 十以内数字转换工具类
+/// </summary>
+public static class SimpleNumberConverter
+{
+    private static readonly Dictionary<char, int> ChineseNumbers = new Dictionary<char, int>
+    {
+        {'零', 0}, {'一', 1}, {'二', 2}, {'三', 3}, {'四', 4},
+        {'五', 5}, {'六', 6}, {'七', 7}, {'八', 8}, {'九', 9},
+        {'壹', 1}, {'贰', 2}, {'叁', 3}, {'肆', 4}, {'伍', 5},
+        {'陆', 6}, {'柒', 7}, {'捌', 8}, {'玖', 9},
+        {'两', 2} // 特殊处理"两"
+    };
+
+    private static readonly Dictionary<string, int> GreekNumbers = new Dictionary<string, int>
+    {
+        {"Ⅰ", 1}, {"Ⅱ", 2}, {"Ⅲ", 3}, {"Ⅳ", 4}, {"Ⅴ", 5},
+        {"Ⅵ", 6}, {"Ⅶ", 7}, {"Ⅷ", 8}, {"Ⅸ", 9}
+    };
+
+    /// <summary>
+    /// 将中文数字转换为阿拉伯数字（仅支持1-9）
+    /// </summary>
+    /// <param name="chineseNumber">中文数字字符</param>
+    /// <returns>转换后的阿拉伯数字，转换失败返回-1</returns>
+    public static int ChineseToArabic(char chineseNumber)
+    {
+        return ChineseNumbers.TryGetValue(chineseNumber, out int result) ? result : -1;
+    }
+
+    /// <summary>
+    /// 将希腊数字转换为阿拉伯数字（仅支持1-10）
+    /// </summary>
+    /// <param name="greekNumber">希腊数字字符串</param>
+    /// <returns>转换后的阿拉伯数字，转换失败返回-1</returns>
+    public static int GreekToArabic(string greekNumber)
+    {
+        return GreekNumbers.TryGetValue(greekNumber, out int result) ? result : -1;
+    }
+
+    /// <summary>
+    /// 智能转换数字（支持中文数字和希腊数字，限10以内）
+    /// </summary>
+    /// <param name="number">要转换的数字字符串</param>
+    /// <returns>转换后的阿拉伯数字，转换失败返回-1</returns>
+    public static int ToArabic(string number)
+    {
+        if (string.IsNullOrEmpty(number))
+            return -1;
+
+        // 尝试直接转换阿拉伯数字
+        if (int.TryParse(number, out int result) && result >= 0 && result < 10)
+            return result;
+
+        // 尝试转换希腊数字
+        int greek = GreekToArabic(number);
+        if (greek != -1)
+            return greek;
+
+        // 尝试转换单个中文数字
+        if (number.Length == 1)
+            return ChineseToArabic(number[0]);
+
+        return -1;
+    }
+}