-

SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs

@@ -340,7 +340,11 @@ namespace SqlSugar
 
         public int Count()
         {
-            throw new NotImplementedException();
+            SqlBuilder.LambadaQueryBuilder.IsCount = true;
+            var sql = SqlBuilder.LambadaQueryBuilder.ToSqlString();
+            var reval= Context.Database.GetInt(sql, SqlBuilder.LambadaQueryBuilder.QueryPars.ToArray()); 
+            SqlBuilder.LambadaQueryBuilder.IsCount = false;
+            return reval;
         }
 
         public TResult Max<TResult>(string maxField)

SqlSugar/Abstract/SqlBuilderProvider/DMLBuilder/LambadaQueryBuilder.cs

@@ -28,6 +28,7 @@ namespace SqlSugar
         #endregion
 
         #region Splicing basic
+        public bool IsCount { get; set; }
         public int? Skip { get; set; }
         public int? Take { get; set; }
         public string OrderByValue { get; set; }
@@ -174,6 +175,7 @@ namespace SqlSugar
         {
             get
             {
+                if (this.IsCount) return " COUNT(1) ";
                 string reval = string.Empty;
                 if (this.SelectValue == null || this.SelectValue is string)
                 {