From 7dcc338899efed6404895d0b249dc2a9fe966ab3 Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Wed, 23 Apr 2025 18:24:45 +0800
Subject: [PATCH] Add LeftJoinIF(BOOL,EXP, TABLENAME)

---
 .../QueryableProvider02-05.cs                 | 124 ++++++++++++++++++
 .../SqlSugar/Interface/IQueryable.cs          |  14 ++
 2 files changed, 138 insertions(+)

diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider02-05.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider02-05.cs
index da2b13369..891360fcc 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider02-05.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider02-05.cs
@@ -209,6 +209,49 @@ namespace SqlSugar
             result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
             return result;
         }
+
+
+        public ISugarQueryable<T, T2, T3> LeftJoinIF<T3>(bool isJoin,Expression<Func<T, T2, T3, bool>> joinExpression, string tableName)
+        {
+            var result = LeftJoin<T3>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+        public ISugarQueryable<T, T2, T3> FullJoinIF<T3>(bool isJoin,Expression<Func<T, T2, T3, bool>> joinExpression, string tableName)
+        {
+            var result = FullJoin<T3>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+        public ISugarQueryable<T, T2, T3> InnerJoinIF<T3>(bool isJoin,Expression<Func<T, T2, T3, bool>> joinExpression, string tableName)
+        {
+            var result = InnerJoin<T3>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+        public ISugarQueryable<T, T2, T3> RightJoinIF<T3>(bool isJoin,Expression<Func<T, T2, T3, bool>> joinExpression, string tableName)
+        {
+            var result = RightJoin<T3>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+
         public ISugarQueryable<T, T2, T3> InnerJoin<T3>(Expression<Func<T, T2, T3, bool>> joinExpression)
         {
             this.Context.InitMappingInfo<T3>();
@@ -904,6 +947,47 @@ namespace SqlSugar
 
         }
 
+        public ISugarQueryable<T, T2, T3,T4> LeftJoinIF<T4>(bool isJoin, Expression<Func<T, T2, T3,T4, bool>> joinExpression, string tableName)
+        {
+            var result = LeftJoin<T4>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+        public ISugarQueryable<T, T2, T3,T4> FullJoinIF<T4>(bool isJoin, Expression<Func<T, T2, T3, T4, bool>> joinExpression, string tableName)
+        {
+            var result = FullJoin<T4>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+        public ISugarQueryable<T, T2, T3, T4> InnerJoinIF<T4>(bool isJoin, Expression<Func<T, T2, T3, T4, bool>> joinExpression, string tableName)
+        {
+            var result = InnerJoin<T4>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+        public ISugarQueryable<T, T2, T3, T4> RightJoinIF<T4>(bool isJoin, Expression<Func<T, T2, T3, T4, bool>> joinExpression, string tableName)
+        {
+            var result = RightJoin<T4>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+
 
         #region  Group 
         public new ISugarQueryable<T, T2,T3> PartitionBy(Expression<Func<T, object>> expression)
@@ -1674,6 +1758,46 @@ namespace SqlSugar
             return result;
         }
 
+        public ISugarQueryable<T, T2, T3, T4, T5> LeftJoinIF<T5>(bool isJoin, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName)
+        {
+            var result = LeftJoin<T5>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+        public ISugarQueryable<T, T2, T3, T4, T5> FullJoinIF<T5>(bool isJoin, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName)
+        {
+            var result = FullJoin<T5>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+        public ISugarQueryable<T, T2, T3, T4, T5> InnerJoinIF<T5>(bool isJoin, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName)
+        {
+            var result = InnerJoin<T5>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
+        public ISugarQueryable<T, T2, T3, T4,T5> RightJoinIF<T5>(bool isJoin, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName)
+        {
+            var result = RightJoin<T5>(joinExpression);
+            result.QueryBuilder.JoinQueryInfos.Last().TableName = tableName;
+            if (isJoin == false)
+            {
+                result.QueryBuilder.JoinQueryInfos.Remove(result.QueryBuilder.JoinQueryInfos.Last());
+            }
+            return result;
+        }
 
         #region Where
         public new ISugarQueryable<T, T2, T3,T4> Where(string expShortName, FormattableString expressionString)
diff --git a/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs b/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
index 7d45895f9..ec07a9800 100644
--- a/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
@@ -351,6 +351,11 @@ namespace SqlSugar
         ISugarQueryable<T, T2, T3> InnerJoin<T3>(Expression<Func<T, T2, T3, bool>> joinExpression);
         ISugarQueryable<T, T2, T3> RightJoin<T3>(Expression<Func<T, T2, T3, bool>> joinExpression);
 
+        ISugarQueryable<T, T2, T3> LeftJoinIF<T3>(bool isJoin, Expression<Func<T, T2, T3, bool>> joinExpression, string tableName);
+        ISugarQueryable<T, T2, T3> FullJoinIF<T3>(bool isJoin, Expression<Func<T, T2, T3, bool>> joinExpression, string tableName);
+        ISugarQueryable<T, T2, T3> InnerJoinIF<T3>(bool isJoin, Expression<Func<T, T2, T3, bool>> joinExpression, string tableName);
+        ISugarQueryable<T, T2, T3> RightJoinIF<T3>(bool isJoin, Expression<Func<T, T2, T3, bool>> joinExpression, string tableName);
+
         ISugarQueryable<T, T2, T3> LeftJoin<T3>(Expression<Func<T, T2, T3, bool>> joinExpression,string tableName);
         ISugarQueryable<T, T2, T3> FullJoin<T3>(Expression<Func<T, T2, T3, bool>> joinExpression,string tableName);
         ISugarQueryable<T, T2, T3> InnerJoin<T3>(Expression<Func<T, T2, T3, bool>> joinExpression,string tableName);
@@ -485,6 +490,11 @@ namespace SqlSugar
         ISugarQueryable<T, T2, T3, T4> FullJoin<T4>(Expression<Func<T, T2, T3, T4, bool>> joinExpression,string tableName);
         ISugarQueryable<T, T2, T3, T4> InnerJoin<T4>(Expression<Func<T, T2, T3, T4, bool>> joinExpression,string tableName);
         ISugarQueryable<T, T2, T3, T4> RightJoin<T4>(Expression<Func<T, T2, T3, T4, bool>> joinExpression,string tableName);
+
+        ISugarQueryable<T, T2, T3,T4> LeftJoinIF<T4>(bool isJoin, Expression<Func<T, T2, T3,T4, bool>> joinExpression, string tableName);
+        ISugarQueryable<T, T2, T3,T4> FullJoinIF<T4>(bool isJoin, Expression<Func<T, T2, T3,T4, bool>> joinExpression, string tableName);
+        ISugarQueryable<T, T2, T3,T4> InnerJoinIF<T4>(bool isJoin, Expression<Func<T, T2, T3,T4, bool>> joinExpression, string tableName);
+        ISugarQueryable<T, T2, T3,T4> RightJoinIF<T4>(bool isJoin, Expression<Func<T, T2, T3,T4, bool>> joinExpression, string tableName);
         #region Where
         new ISugarQueryable<T, T2,T3> Where(string expShortName, FormattableString expressionString);
         new ISugarQueryable<T, T2, T3> Where(Expression<Func<T, bool>> expression);
@@ -630,6 +640,10 @@ namespace SqlSugar
         ISugarQueryable<T, T2, T3, T4, T5> FullJoin<T5>(Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName);
         ISugarQueryable<T, T2, T3, T4, T5> InnerJoin<T5>(Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName);
         ISugarQueryable<T, T2, T3, T4, T5> RightJoin<T5>(Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName);
+        ISugarQueryable<T, T2, T3, T4,T5> LeftJoinIF<T5>(bool isJoin, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName);
+        ISugarQueryable<T, T2, T3, T4, T5> FullJoinIF<T5>(bool isJoin, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName);
+        ISugarQueryable<T, T2, T3, T4, T5> InnerJoinIF<T5>(bool isJoin, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName);
+        ISugarQueryable<T, T2, T3, T4, T5> RightJoinIF<T5>(bool isJoin, Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression, string tableName);
 
         #region Where
         new ISugarQueryable<T, T2, T3,T4> Where(string expShortName, FormattableString expressionString);