diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/ExpressionTest/Where.cs b/Src/Asp.Net/SqlServerTest/UnitTest/ExpressionTest/Where.cs
index 78d5105b4..5569f6ddb 100644
--- a/Src/Asp.Net/SqlServerTest/UnitTest/ExpressionTest/Where.cs
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/ExpressionTest/Where.cs
@@ -21,6 +21,7 @@ namespace OrmTest.UnitTest
             base.Begin();
             for (int i = 0; i < base.Count; i++)
             {
+                whereSingle16();
                 whereSingle15();
                 whereSingle1();
                 whereSingle2();
@@ -264,6 +265,21 @@ namespace OrmTest.UnitTest
                 new SugarParameter("@Const0",1)
             }, "whereSingle15");
         }
+
+        private void whereSingle16()
+        {
+            Dictionary<string, string> dic = new Dictionary<string, string>();
+            dic.Add("key", "x1");
+            Expression<Func<DataTestInfo, bool>> exp = it => it.String == dic["key"];
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
+            var value = expContext.Result.GetString();
+            var pars = expContext.Parameters;
+            base.Check(value, pars, "( [String] = @Const0 )", new List<SugarParameter>()
+            {
+                new SugarParameter("@Const0",dic["key"])
+            }, "whereSingle16");
+        }
     }
 
     public class WhereConst
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/ExpressionTool.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/ExpressionTool.cs
index af9761d70..ed8d4a3e6 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/ExpressionTool.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/ExpressionTool.cs
@@ -158,7 +158,7 @@ namespace SqlSugar
             return reval;
         }
 
-        public static object DynamicInvoke(MemberExpression expression)
+        public static object DynamicInvoke(Expression expression)
         {
             object value = Expression.Lambda(expression).Compile().DynamicInvoke();
             if (value != null && value.GetType().IsClass && value.GetType() != ExpressionConst.StringType)
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
index ab4c67507..4ceec622b 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
@@ -14,6 +14,13 @@ namespace SqlSugar
             var express = base.Expression as MethodCallExpression;
             var isLeft = parameter.IsLeft;
             string methodName = express.Method.Name;
+            if (methodName == "get_Item") {
+                string paramterName =this.Context.SqlParameterKeyWord+ExpressionConst.Const + this.Context.ParameterIndex;
+                this.Context.Parameters.Add(new SugarParameter(paramterName, ExpressionTool.DynamicInvoke(express)));
+                this.Context.Result.Append(string.Format(" {0} ",paramterName));
+                this.Context.ParameterIndex++;
+                return;
+            }
             var isValidNativeMethod = MethodMapping.ContainsKey(methodName)&&express.Method.DeclaringType.Namespace==("System");
             if (!isValidNativeMethod&&express.Method.DeclaringType.Namespace.IsIn("System.Linq", "System.Collections.Generic")&&methodName=="Contains") {
                 methodName = "ContainsArray";