diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
index 96ddb0f..b818806 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
@@ -554,35 +554,26 @@ namespace JoyD.Windows.CS
         /// 删除温差图例按钮点击事件
         /// </summary>
         private void BtnDeleteTempDiff_Click(object sender, EventArgs e)
-        {
+        {            
             try
-            {
-                // 检查是否有选中的行
+            {                
+                // 只删除选中的温差图例
                 if (dataGridViewTempDiff.SelectedRows.Count > 0)
-                {
+                {                    
                     // 获取选中行的索引
                     int selectedRowIndex = dataGridViewTempDiff.SelectedRows[0].Index;
                     
                     // 从数据集合中删除该行数据
                     if (selectedRowIndex >= 0 && selectedRowIndex < tempDiffData.Count)
-                    {
+                    {                        
                         tempDiffData.RemoveAt(selectedRowIndex);
                         // 从DataGridView中删除该行
                         dataGridViewTempDiff.Rows.RemoveAt(selectedRowIndex);
                     }
                 }
-                else
-                {
-                    // 如果没有选中行，默认删除最后一行
-                    if (tempDiffData.Count > 0)
-                    {
-                        tempDiffData.RemoveAt(tempDiffData.Count - 1);
-                        dataGridViewTempDiff.Rows.RemoveAt(dataGridViewTempDiff.Rows.Count - 1);
-                    }
-                }
-            }
+            }            
             catch (Exception ex)
-            {
+            {                
                 Console.WriteLine("删除温差图例失败: " + ex.Message);
             }
         }