Add Queryable.IF

Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs

@@ -357,6 +357,13 @@ namespace SqlSugar
             var entityName = typeof(T).Name;
             return _As(tableName, entityName);
         }
+
+        public ISugarQueryable<T> IF(bool condition, Action<ISugarQueryable<T>> action) 
+        {
+            if(condition)
+              action(this);
+            return this;
+         }
         public ISugarQueryable<T> AsWithAttr() 
         {
             var asName=GetTableName(this.EntityInfo, this.EntityInfo.DbTableName);

Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider02-05.cs

@@ -16,6 +16,10 @@ namespace SqlSugar
     #region T2
     public partial class QueryableProvider<T, T2> : QueryableProvider<T>, ISugarQueryable<T, T2>
     {
+        public new ISugarQueryable<T, T2> IF(bool condition, Action<ISugarQueryable<T>> action) 
+        {
+            throw new Exception("Only Queryable<T>().IF is supported, and Queryable<T,T2,>().IF is not supported");
+        }
         public new ISugarQueryable<T,T2> Hints(string hints)
         {
             this.QueryBuilder.Hints = hints;
@@ -695,6 +699,10 @@ namespace SqlSugar
     #region T3
     public partial class QueryableProvider<T, T2, T3> : QueryableProvider<T>, ISugarQueryable<T, T2, T3>
     {
+        public new ISugarQueryable<T, T2,T3> IF(bool condition, Action<ISugarQueryable<T>> action)
+        {
+            throw new Exception("Only Queryable<T>().IF is supported, and Queryable<T,T2,>().IF is not supported");
+        }
         public new ISugarQueryable<T, T2,T3> Hints(string hints)
         {
             this.QueryBuilder.Hints = hints;
@@ -1480,6 +1488,10 @@ namespace SqlSugar
     #region T4
     public partial class QueryableProvider<T, T2, T3, T4> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4>
     {
+        public new ISugarQueryable<T, T2,T3,T4> IF(bool condition, Action<ISugarQueryable<T>> action)
+        {
+            throw new Exception("Only Queryable<T>().IF is supported, and Queryable<T,T2,>().IF is not supported");
+        }
         public new ISugarQueryable<T, T2, T3,T4> Hints(string hints)
         {
             this.QueryBuilder.Hints = hints;
@@ -2286,6 +2298,10 @@ namespace SqlSugar
     #region T5   
     public partial class QueryableProvider<T, T2, T3, T4, T5> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4, T5>
     {
+        public new ISugarQueryable<T, T2,T3,T4,T5> IF(bool condition, Action<ISugarQueryable<T>> action)
+        {
+            throw new Exception("Only Queryable<T>().IF is supported, and Queryable<T,T2,>().IF is not supported");ss
+        }
         public new ISugarQueryable<T, T2, T3, T4,T5> Hints(string hints)
         {
             this.QueryBuilder.Hints = hints;

Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider06-10.cs

@@ -15,6 +15,10 @@ namespace SqlSugar
     #region T6
     public partial class QueryableProvider<T, T2, T3, T4, T5, T6> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4, T5, T6>
     {
+        public new ISugarQueryable<T, T2, T3, T4, T5, T6> IF(bool condition, Action<ISugarQueryable<T>> action)
+        {
+            throw new Exception("Only Queryable<T>().IF is supported, and Queryable<T,T2,>().IF is not supported");
+        }
         public new ISugarQueryable<T, T2, T3, T4, T5,T6> Hints(string hints)
         {
             this.QueryBuilder.Hints = hints;

Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs

@@ -20,6 +20,7 @@ namespace SqlSugar
         ISugarQueryable<T> Hints(string hints);
         ISugarQueryable<T> AS<T2>(string tableName);
         ISugarQueryable<T> AS(string tableName);
+        ISugarQueryable<T> IF(bool condition, Action<ISugarQueryable<T>> action);
         ISugarQueryable<T> AsWithAttr();
         ISugarQueryable<T> AsType(Type tableNameType);
         ISugarQueryable<Type> Cast<Type>();
@@ -332,6 +333,7 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2> : ISugarQueryable<T>
     {
+        new ISugarQueryable<T,T2> IF(bool condition, Action<ISugarQueryable<T>> action);
         new ISugarQueryable<T,T2> Hints(string hints);
         new ISugarQueryable<T,T2> SampleBy(int timeNumber, SampleByUnit timeType);
         new ISugarQueryable<T,T2> SampleBy(int timeNumber, string timeType);
@@ -462,6 +464,7 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3> : ISugarQueryable<T>
     {
+        new ISugarQueryable<T, T2,T3> IF(bool condition, Action<ISugarQueryable<T>> action);
         new ISugarQueryable<T, T2,T3> Hints(string hints);
         new ISugarQueryable<T, T2,T3> SampleBy(int timeNumber, SampleByUnit timeType);
         new ISugarQueryable<T, T2,T3> SampleBy(int timeNumber, string timeType);
@@ -607,6 +610,7 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4> : ISugarQueryable<T>
     {
+        new ISugarQueryable<T, T2,T3,T4> IF(bool condition, Action<ISugarQueryable<T>> action);
         new ISugarQueryable<T, T2, T3,T4> Hints(string hints);
         new ISugarQueryable<T, T2, T3,T4> SampleBy(int timeNumber, SampleByUnit timeType);
         new ISugarQueryable<T, T2, T3,T4> SampleBy(int timeNumber, string timeType);
@@ -758,6 +762,7 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4, T5> : ISugarQueryable<T>
     {
+        new ISugarQueryable<T, T2,T3,T4,T5> IF(bool condition, Action<ISugarQueryable<T>> action);
         new ISugarQueryable<T, T2, T3, T4,T5> Hints(string hints);
         new ISugarQueryable<T, T2, T3, T4,T5> SampleBy(int timeNumber, SampleByUnit timeType);
         new ISugarQueryable<T, T2, T3, T4,T5> SampleBy(int timeNumber, string timeType);
@@ -904,6 +909,7 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6> : ISugarQueryable<T>
     {
+        new ISugarQueryable<T, T2, T3, T4, T5, T6> IF(bool condition, Action<ISugarQueryable<T>> action);
         new ISugarQueryable<T, T2, T3, T4, T5,T6> Hints(string hints);
         ISugarQueryable<TResult> SelectMergeTable<TResult>(Expression<Func<T, T2, T3, T4, T5,T6, TResult>> expression);
         ISugarQueryable<T, T2, T3, T4, T5, T6,T7> LeftJoinIF<T7>(bool isLeftJoin, Expression<Func<T, T2, T3, T4, T5, T6,T7, bool>> joinExpression);