From b1c3e2781b3c6451e3f848df38578a47a71e24cc Mon Sep 17 00:00:00 2001
From: "GukSang.Jin" <guksang_chen@163.com>
Date: Tue, 6 Jan 2026 11:33:44 +0800
Subject: [PATCH] gx

---
 WindowsFormsApp6/Form3.cs | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/WindowsFormsApp6/Form3.cs b/WindowsFormsApp6/Form3.cs
index d5d4e42..8e0b49f 100644
--- a/WindowsFormsApp6/Form3.cs
+++ b/WindowsFormsApp6/Form3.cs
@@ -254,12 +254,31 @@ namespace WindowsFormsApp6
         {
             if (e.RowIndex < 0 || e.ColumnIndex == 0) return; // 跳过序号列
 
+            // 获取当前行的序号，判断是否是标准偏差行
+            string rowName = "";
+            if (e.RowIndex < dataGridView1.Rows.Count)
+            {
+                var row = dataGridView1.Rows[e.RowIndex];
+                if (row.Cells["序号"].Value != null)
+                {
+                    rowName = row.Cells["序号"].Value.ToString();
+                }
+            }
+
             // 格式化数值显示为2位小数
             if (e.Value != null && e.Value != DBNull.Value)
             {
                 if (double.TryParse(e.Value.ToString(), out double numValue))
                 {
-                    // 如果值为0或接近0，显示为空白
+                    // 标准偏差行：即使为0也要显示
+                    if (rowName == ROW_STD_DEVIATION)
+                    {
+                        e.Value = numValue.ToString("F2");
+                        e.FormattingApplied = true;
+                        return;
+                    }
+                    
+                    // 其他行：如果值为0或接近0，显示为空白
                     if (Math.Abs(numValue) < 0.001)
                     {
                         e.Value = "";