-

Src/Asp.Net/SqlServerTest/Demos/5_CodeFirst.cs

@@ -22,8 +22,10 @@ namespace OrmTest.Demo
         public DateTime? DateTime { get; set; }
         [SugarColumn(IsNullable = true,OldColumnName = "Dob")]
         public double? Dob2 { get; set; }
-        [SugarColumn(Length =110)]
+        [SugarColumn(Length =11000)]
         public string A1 { get; set; }
+        [SugarColumn(Length = 18,DecimalDigits=2)]
+        public decimal Dec { get; set; }
     }
     public class CodeTable2 {
         public int Id { get; set; }

Src/Asp.Net/SqlSugar/Abstract/DbMaintenanceProvider/Methods.cs

@@ -238,10 +238,7 @@ namespace SqlSugar
             {
                 string columnName = this.SqlBuilder.GetTranslationTableName(item.DbColumnName);
                 string dataType = item.DataType;
-                string dataSize = item.Length > 0 ? string.Format("({0})", item.Length) : null;
+                string dataSize = GetSize(item);
-                if (item.Length>4000|| item.Length==-1) {
-                    dataSize = string.Format("({0})","max");
-                }
                 string nullType = item.IsNullable ? this.CreateTableNull : CreateTableNotNull;
                 string primaryKey = null;
                 string identity = item.IsIdentity ? this.CreateTableIdentity : null;
@@ -251,12 +248,31 @@ namespace SqlSugar
             string tableString = string.Format(this.CreateTableSql, this.SqlBuilder.GetTranslationTableName(tableName), string.Join(",\r\n", columnArray));
             return tableString;
         }
+
+        protected virtual  string GetSize(DbColumnInfo item)
+        {
+            string dataSize = null;
+            var isMax = item.Length > 4000 || item.Length == -1;
+            if (isMax) {
+                dataSize = item.Length > 0 ? string.Format("({0})", "max") : null;
+            }
+            else if (item.Length > 0 && item.DecimalDigits == 0)
+            {
+                dataSize = item.Length > 0 ? string.Format("({0})", item.Length) : null;
+            }
+            else if (item.Length > 0 && item.DecimalDigits > 0)
+            {
+                dataSize = item.Length > 0 ? string.Format("({0},{1})", item.Length, item.DecimalDigits) : null;
+            }
+            return dataSize;
+        }
+
         protected virtual string GetAddColumnSql(string tableName, DbColumnInfo columnInfo)
         {
             string columnName = this.SqlBuilder.GetTranslationColumnName(columnInfo.DbColumnName);
             tableName = this.SqlBuilder.GetTranslationTableName(tableName);
             string dataType = columnInfo.DataType;
-            string dataSize = columnInfo.Length > 0 ? string.Format("({0})", columnInfo.Length) : null;
+            string dataSize = GetSize(columnInfo);
             string nullType = columnInfo.IsNullable ? this.CreateTableNull : CreateTableNotNull;
             string primaryKey = null;
             string identity = null;
@@ -268,7 +284,7 @@ namespace SqlSugar
             string columnName = this.SqlBuilder.GetTranslationTableName(columnInfo.DbColumnName);
             tableName = this.SqlBuilder.GetTranslationTableName(tableName);
             string dataType = columnInfo.DataType;
-            string dataSize = columnInfo.Length > 0 ? string.Format("({0})", columnInfo.Length) : null;
+            string dataSize = GetSize(columnInfo);
             string nullType = columnInfo.IsNullable ? this.CreateTableNull : CreateTableNotNull;
             string primaryKey = null;
             string identity = null;

Src/Asp.Net/SqlSugar/Entities/DbColumnInfo.cs

@@ -19,5 +19,6 @@ namespace SqlSugar
         public bool IsIdentity { get; set; }
         public bool IsPrimarykey { get; set; }
         public object Value { get; set; }
+        public int DecimalDigits { get; set; }
     }
 }

Src/Asp.Net/SqlSugar/Entities/Mapping/SugarMappingAttribute.cs

@@ -87,8 +87,8 @@ namespace SqlSugar
             set { _ColumnDataType = value; }
         }
 
-        private int? _DecimalDigits;
+        private int  _DecimalDigits;
-        private int? DecimalDigits {
+        public int  DecimalDigits {
             get { return _DecimalDigits; }
             set { _DecimalDigits = value; }
         }