添加表格单元转换工具。

修复表格数据结构保存。

Runtime/XTable/Mapping/XTableCoordinateFormat.cs

@@ -0,0 +1,125 @@
+using System.Text;
+
+namespace XericUI.XTable.Mapping
+{
+	/// <summary>
+	/// 表格坐标文本格式化工具——
+	/// 列索引 ↔ 字母（A..Z, AA..ZZ）、单元格文本 ↔ (row,col)、范围文本 ↔ 矩形选区。
+	/// </summary>
+	public static class XTableCoordinateFormat
+	{
+		private const string ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+		#region 列字母转换
+
+		/// <summary>列索引转 Excel 风格字母（0→A, 25→Z, 26→AA）</summary>
+		public static string ColumnIndexToLetter(int col)
+		{
+			if (col < 0) return string.Empty;
+
+			var sb = new StringBuilder(4);
+			do
+			{
+				sb.Insert(0, ALPHABET[col % 26]);
+				col = col / 26 - 1;
+			} while (col >= 0);
+			return sb.ToString();
+		}
+
+		/// <summary>Excel 字母转列索引（A→0, Z→25, AA→26）</summary>
+		public static int LetterToColumnIndex(string letter)
+		{
+			if (string.IsNullOrEmpty(letter)) return -1;
+
+			int result = 0;
+			foreach (char c in letter.ToUpperInvariant())
+			{
+				if (c < 'A' || c > 'Z') return -1;
+				result = result * 26 + (c - 'A' + 1);
+			}
+			return result - 1;
+		}
+
+		#endregion
+
+		#region 单元格文本 ↔ 索引
+
+		/// <summary>单元格索引 → "A0" 格式文本</summary>
+		public static string CellToText(int row, int col)
+		{
+			return $"{ColumnIndexToLetter(col)}{row}";
+		}
+
+		/// <summary>"A0" 格式文本 → (row, col)，解析失败返回 false</summary>
+		public static bool TryParseCell(string text, out int row, out int col)
+		{
+			row = -1;
+			col = -1;
+			if (string.IsNullOrEmpty(text)) return false;
+
+			// 分离字母前缀和数字后缀
+			int i = 0;
+			while (i < text.Length && char.IsLetter(text[i])) i++;
+			if (i == 0 || i == text.Length) return false;
+
+			string colPart = text.Substring(0, i);
+			string rowPart = text.Substring(i);
+
+			col = LetterToColumnIndex(colPart);
+			if (col < 0) return false;
+			if (!int.TryParse(rowPart, out row) || row < 0) return false;
+			return true;
+		}
+
+		#endregion
+
+		#region 范围文本 ↔ 矩形选区
+
+		/// <summary>矩形选区 → "A0:B1" 格式（统一使用左上:右下）</summary>
+		public static string RangeToText(int startRow, int startCol, int endRow, int endCol)
+		{
+			NormalizeRange(ref startRow, ref startCol, ref endRow, ref endCol);
+			return $"{ColumnIndexToLetter(startCol)}{startRow}:{ColumnIndexToLetter(endCol)}{endRow}";
+		}
+
+		/// <summary>"A0:B1" 格式文本 → 矩形选区参数，解析失败返回 false</summary>
+		public static bool TryParseRange(string text,
+			out int startRow, out int startCol,
+			out int endRow, out int endCol)
+		{
+			startRow = -1; startCol = -1; endRow = -1; endCol = -1;
+			if (string.IsNullOrEmpty(text)) return false;
+
+			int colon = text.IndexOf(':');
+			if (colon < 0)
+			{
+				// 无冒号，尝试作为单个单元格解析
+				if (TryParseCell(text, out startRow, out startCol))
+				{
+					endRow = startRow;
+					endCol = startCol;
+					return true;
+				}
+				return false;
+			}
+
+			string left = text.Substring(0, colon);
+			string right = text.Substring(colon + 1);
+
+			if (!TryParseCell(left, out startRow, out startCol)) return false;
+			if (!TryParseCell(right, out endRow, out endCol)) return false;
+
+			return true;
+		}
+
+		/// <summary>将命名范围标准化（确保 start ≤ end），返回 (minR, minC, maxR, maxC)</summary>
+		public static void NormalizeRange(ref int startRow, ref int startCol,
+			ref int endRow, ref int endCol)
+		{
+			if (startRow > endRow) (startRow, endRow) = (endRow, startRow);
+			if (startCol > endCol) (startCol, endCol) = (endCol, startCol);
+		}
+
+		#endregion
+	}
+}

Runtime/XTable/Mapping/XTableCoordinateFormat.cs.meta

@@ -0,0 +1,11 @@
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