From 646e44e1a294749ed25b35cb02f15aa45ad98242 Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Sun, 11 Dec 2022 17:09:37 +0800
Subject: [PATCH] Synchronization code

---
 .../SqlSugar/Interface/IContextMethods.cs     |  1 +
 .../SqlSugar/Infrastructure/ContextMethods.cs | 34 +++++++++++++++++++
 .../SqlSugar/Interface/IContextMethods.cs     |  1 +
 .../SqlSugar/Utilities/UtilMethods.cs         |  6 +++-
 4 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/Src/Asp.Net/SqlSugar/Interface/IContextMethods.cs b/Src/Asp.Net/SqlSugar/Interface/IContextMethods.cs
index 098162782..e9c43a797 100644
--- a/Src/Asp.Net/SqlSugar/Interface/IContextMethods.cs
+++ b/Src/Asp.Net/SqlSugar/Interface/IContextMethods.cs
@@ -34,6 +34,7 @@ namespace SqlSugar
         dynamic DataTableToDynamic(DataTable table);
         List<T> DataTableToList<T>(DataTable table);
         DataTable ListToDataTable<T>(List<T> list);
+        DataTable ListToDataTableWithAttr<T>(List<T> list);
         Dictionary<string, object> DataTableToDictionary(DataTable table);
         List<Dictionary<string, object>> DataTableToDictionaryList(DataTable table);
         ICacheService GetReflectionInoCacheInstance();
diff --git a/Src/Asp.NetCore2/SqlSugar/Infrastructure/ContextMethods.cs b/Src/Asp.NetCore2/SqlSugar/Infrastructure/ContextMethods.cs
index 129171124..14d790b8c 100644
--- a/Src/Asp.NetCore2/SqlSugar/Infrastructure/ContextMethods.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Infrastructure/ContextMethods.cs
@@ -816,6 +816,40 @@ namespace SqlSugar
             }
             return result;
         }
+
+        public DataTable ListToDataTableWithAttr<T>(List<T> list)
+        {
+            var entityInfo = this.Context.EntityMaintenance.GetEntityInfo<T>();
+            DataTable result = new DataTable();
+            result.TableName = entityInfo.DbTableName;
+            if (list != null && list.Count > 0)
+            {
+                var colimnInfos = entityInfo.Columns.Where(it=>it.IsIgnore==false);
+                foreach (var pi in colimnInfos)
+                {
+                    //获取类型
+                    Type colType = pi.PropertyInfo.PropertyType;
+                    //当类型为Nullable<>时
+                    if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition() == typeof(Nullable<>)))
+                    {
+                        colType = colType.GetGenericArguments()[0];
+                    }
+                    result.Columns.Add(pi.DbColumnName, colType);
+                }
+                for (int i = 0; i < list.Count; i++)
+                {
+                    ArrayList tempList = new ArrayList();
+                    foreach (var pi in colimnInfos)
+                    {
+                        object obj = pi.PropertyInfo.GetValue(list[i], null);
+                        tempList.Add(obj);
+                    }
+                    object[] array = tempList.ToArray();
+                    result.LoadDataRow(array, true);
+                }
+            }
+            return result;
+        }
         public Dictionary<string, object> DataTableToDictionary(DataTable table)
         {
            return table.Rows.Cast<DataRow>().ToDictionary(x => x[0].ToString(), x => x[1]);
diff --git a/Src/Asp.NetCore2/SqlSugar/Interface/IContextMethods.cs b/Src/Asp.NetCore2/SqlSugar/Interface/IContextMethods.cs
index 098162782..e9c43a797 100644
--- a/Src/Asp.NetCore2/SqlSugar/Interface/IContextMethods.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Interface/IContextMethods.cs
@@ -34,6 +34,7 @@ namespace SqlSugar
         dynamic DataTableToDynamic(DataTable table);
         List<T> DataTableToList<T>(DataTable table);
         DataTable ListToDataTable<T>(List<T> list);
+        DataTable ListToDataTableWithAttr<T>(List<T> list);
         Dictionary<string, object> DataTableToDictionary(DataTable table);
         List<Dictionary<string, object>> DataTableToDictionaryList(DataTable table);
         ICacheService GetReflectionInoCacheInstance();
diff --git a/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs b/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs
index 02a38b5d0..e297fcf47 100644
--- a/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs
@@ -19,7 +19,11 @@ namespace SqlSugar
     {
         public static string ToUnderLine(string str, bool isToUpper = false)
         {
-            if (isToUpper)
+            if (str == null || str.Contains("_"))
+            {
+                return str;
+            }
+            else if (isToUpper)
             {
                 return string.Concat(str.Select((x, i) => i > 0 && char.IsUpper(x) ? "_" + x.ToString() : x.ToString())).ToUpper();
             }