Update db.Fastest

Src/Asp.Net/MySqlTest/Demo/DemoO_Fastest.cs

@@ -45,7 +45,7 @@ namespace OrmTest
                 }
             });
             db.CodeFirst.InitTables<TestFAST111>();
-            db.Fastest<TestFAST111>().BulkCopy(new List<TestFAST111>() { 
+            db.Fastest<TestFAST111>().SetCharacterSet("utf8mb4").BulkCopy(new List<TestFAST111>() { 
               new TestFAST111(){  Date=DateTime.Now, Id=Guid.NewGuid()+"", Sex=1 , X=111,json=new string[]{ "x"} }
             });
             var data = new List<TestFAST111>() {

Src/Asp.Net/MySqlTest/Program.cs

@@ -8,6 +8,7 @@ namespace OrmTest
         {
             //Demo
             Demo0_SqlSugarClient.Init();
+            DemoO_Fastest.Init();
             Demo1_Queryable.Init();
             Demo2_Updateable.Init();
             Demo3_Insertable.Init();

Src/Asp.Net/SqlSugar/Abstract/FastestProvider/Setting.cs

@@ -13,9 +13,10 @@ namespace SqlSugar
         private string CacheKey { get; set; }
         private string CacheKeyLike { get; set; }
         private string CharacterSet { get; set; }
-        public void SetCharacterSet(string CharacterSet) 
+        public IFastest<T> SetCharacterSet(string CharacterSet) 
         {
             this.CharacterSet = CharacterSet;
+            return this;
         }
         public IFastest<T> RemoveDataCache() 
         {

Src/Asp.Net/SqlSugar/Interface/IFastest.cs

@@ -12,7 +12,7 @@ namespace SqlSugar
         IFastest<T> RemoveDataCache(string cacheKey);
         IFastest<T> AS(string tableName);
         IFastest<T> PageSize(int Size);
-        void SetCharacterSet(string CharacterSet);
+        IFastest<T> SetCharacterSet(string CharacterSet);
         int BulkCopy(List<T> datas);
         Task<int> BulkCopyAsync(List<T> datas);
         int BulkCopy(string tableName,DataTable dataTable);

Src/Asp.Net/SqlSugar/OnlyNet/OracleFastBuilder.cs

@@ -9,6 +9,7 @@ namespace SqlSugar
 {
     public class OracleFastBuilder:IFastBuilder
     {
+        public string CharacterSet { get; set; }
         public OracleFastBuilder(EntityInfo entityInfo) 
         {
             throw new Exception("Only.net CORE is supported");

Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlFastBuilder.cs

@@ -44,7 +44,7 @@ namespace SqlSugar
                     TableName = dt.TableName,
                     Local = true,
                 };
-                if (bulk.CharacterSet.HasValue()) 
+                if (this.CharacterSet.HasValue()) 
                 {
                     bulk.CharacterSet = this.CharacterSet;
                 }

Src/Asp.Net/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteFastBuilder.cs

@@ -12,6 +12,7 @@ namespace SqlSugar
     {
         private EntityInfo entityInfo;
         private bool IsUpdate = false;
+        public string CharacterSet { get; set; }
         private DataTable UpdateDataTable { get; set; }
         public SqliteFastBuilder(EntityInfo entityInfo)
         {