处理SQL拼接时，防止字段中出现SQL关键字而导致错误。

Dapper.LiteSql/Dapper.LiteSql/SqlString/ISqlString.cs

@@ -226,6 +226,7 @@ namespace Dapper.LiteSql
         /// </summary>
         SqlValue ForList(IList list);
 
+        #region 增删改查接口
         /// <summary>
         /// 查询实体
         /// </summary>
@@ -359,6 +360,7 @@ namespace Dapper.LiteSql
         /// 给定一条查询SQL，返回其查询结果的数量
         /// </summary>
         Task<CountResult> QueryCountAsync(int pageSize);
+        #endregion
 
     }
 }

Dapper.LiteSql/Dapper.LiteSql/SqlString/SqlString.cs

@@ -374,7 +374,7 @@ namespace Dapper.LiteSql
         /// <param name="args">参数(支持多个参数或者把多个参数放在一个匿名对象中)</param>
         public ISqlString Where(string sql, params object[] args)
         {
-            if (RemoveSubSqls(_sql.ToString()).Contains("where"))
+            if (RemoveSubSqls(_sql.ToString()).Contains(" where "))
             {
                 return Append("and " + sql, args);
             }
@@ -391,7 +391,7 @@ namespace Dapper.LiteSql
         /// <param name="args">参数(支持多个参数或者把多个参数放在一个匿名对象中)</param>
         public ISqlQueryable<T> Where<T>(string sql, params object[] args) where T : new()
         {
-            if (RemoveSubSqls(_sql.ToString()).Contains("where"))
+            if (RemoveSubSqls(_sql.ToString()).Contains(" where "))
             {
                 return Append<T>("and " + sql, args);
             }
@@ -411,7 +411,7 @@ namespace Dapper.LiteSql
         /// <param name="args">参数(支持多个参数或者把多个参数放在一个匿名对象中)</param>
         public ISqlString WhereIf(bool condition, string sql, params object[] args)
         {
-            if (RemoveSubSqls(_sql.ToString()).Contains("where"))
+            if (RemoveSubSqls(_sql.ToString()).Contains(" where "))
             {
                 return AppendIf(condition, "and " + sql, args);
             }
@@ -429,7 +429,7 @@ namespace Dapper.LiteSql
         /// <param name="args">参数(支持多个参数或者把多个参数放在一个匿名对象中)</param>
         public ISqlQueryable<T> WhereIf<T>(bool condition, string sql, params object[] args) where T : new()
         {
-            if (RemoveSubSqls(_sql.ToString()).Contains("where"))
+            if (RemoveSubSqls(_sql.ToString()).Contains(" where "))
             {
                 return AppendIf<T>(condition, "and " + sql, args);
             }
@@ -448,7 +448,7 @@ namespace Dapper.LiteSql
         /// <param name="args">参数(支持多个参数或者把多个参数放在一个匿名对象中)</param>
         public ISqlString Having(string sql, params object[] args)
         {
-            if (RemoveSubSqls(_sql.ToString()).Contains("having"))
+            if (RemoveSubSqls(_sql.ToString()).Contains(" having "))
             {
                 return Append("and " + sql, args);
             }
@@ -465,7 +465,7 @@ namespace Dapper.LiteSql
         /// <param name="args">参数(支持多个参数或者把多个参数放在一个匿名对象中)</param>
         public ISqlQueryable<T> Having<T>(string sql, params object[] args) where T : new()
         {
-            if (RemoveSubSqls(_sql.ToString()).Contains("having"))
+            if (RemoveSubSqls(_sql.ToString()).Contains(" having "))
             {
                 return Append<T>("and " + sql, args);
             }

Dapper.LiteSql/Dapper.LiteSql/SqlString/SqlStringT.cs

@@ -109,7 +109,7 @@ namespace Dapper.LiteSql
                     result = ParamsAddRange(dbParameters, result);
                 }
 
-                if (RemoveSubSqls(_sql.ToString()).Contains("where"))
+                if (RemoveSubSqls(_sql.ToString()).Contains(" where "))
                 {
                     _sql.Append(" and " + result);
                 }
@@ -146,7 +146,7 @@ namespace Dapper.LiteSql
                     result = ParamsAddRange(dbParameters, result);
                 }
 
-                if (RemoveSubSqls(_sql.ToString()).Contains("where"))
+                if (RemoveSubSqls(_sql.ToString()).Contains(" where "))
                 {
                     _sql.Append(" and " + result);
                 }
@@ -183,7 +183,7 @@ namespace Dapper.LiteSql
                     result = ParamsAddRange(dbParameters, result);
                 }
 
-                if (RemoveSubSqls(_sql.ToString()).Contains("where"))
+                if (RemoveSubSqls(_sql.ToString()).Contains(" where "))
                 {
                     _sql.Append(" and " + result);
                 }
@@ -220,7 +220,7 @@ namespace Dapper.LiteSql
                     result = ParamsAddRange(dbParameters, result);
                 }
 
-                if (RemoveSubSqls(_sql.ToString()).Contains("where"))
+                if (RemoveSubSqls(_sql.ToString()).Contains(" where "))
                 {
                     _sql.Append(" and " + result);
                 }
@@ -248,7 +248,7 @@ namespace Dapper.LiteSql
             DbParameter[] dbParameters;
             string sql = condition.VisitLambda(expression, out dbParameters);
 
-            if (!_sql.ToString().Contains("order by"))
+            if (!_sql.ToString().Contains(" order by "))
             {
                 _sql.AppendFormat(" order by {0} asc ", sql);
             }
@@ -271,7 +271,7 @@ namespace Dapper.LiteSql
             DbParameter[] dbParameters;
             string sql = condition.VisitLambda(expression, out dbParameters);
 
-            if (!_sql.ToString().Contains("order by"))
+            if (!_sql.ToString().Contains(" order by "))
             {
                 _sql.AppendFormat(" order by {0} desc ", sql);
             }
@@ -390,9 +390,9 @@ namespace Dapper.LiteSql
             {
                 sql = sql + subSql.SQL;
             }
-            if (_sql.ToString().Contains("from"))
+            if (_sql.ToString().Contains(" from "))
             {
-                string[] leftRigth = _sql.ToString().Split(new string[] { "from" }, StringSplitOptions.None);
+                string[] leftRigth = _sql.ToString().Split(new string[] { " from " }, StringSplitOptions.None);
                 string left = leftRigth[0];
                 string right = leftRigth[1];
 
@@ -454,9 +454,9 @@ namespace Dapper.LiteSql
                 }
             }
 
-            if (_sql.ToString().Contains("from"))
+            if (_sql.ToString().Contains(" from "))
             {
-                string[] leftRigth = _sql.ToString().Split(new string[] { "from" }, StringSplitOptions.None);
+                string[] leftRigth = _sql.ToString().Split(new string[] { " from " }, StringSplitOptions.None);
                 string left = leftRigth[0];
                 string right = leftRigth[1];
 
@@ -493,9 +493,9 @@ namespace Dapper.LiteSql
             ExpressionHelper<U> condition2 = new ExpressionHelper<U>(this, _provider, _dbParameterNames, SqlStringMethod.Select);
             string sql2 = condition.VisitLambda(expression2, out dbParameters);
 
-            if (_sql.ToString().Contains("from"))
+            if (_sql.ToString().Contains(" from "))
             {
-                string[] leftRigth = _sql.ToString().Split(new string[] { "from" }, StringSplitOptions.None);
+                string[] leftRigth = _sql.ToString().Split(new string[] { " from " }, StringSplitOptions.None);
                 string left = leftRigth[0];
                 string right = leftRigth[1];