Serialize a Parsed Lambda Expression to Database









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I have users who will generate business rules via simple statements that result in true or false
Example: Result > 10 AND Result < 100



I am using Linq.Dynamic to convert these statements I am finding the ParseLambda is taking too long (simple example took 21ms). So I would like to save the Lambda Expression to the database to pull and use later. From my testing I have found the call to ParseLambda is taking the most time, therefore I am wondering if it is possible to serialize this Lambda Expression and persist to a database pulling it when needed. The idea is to have it saved to the database already parsed.



Maybe this is the wrong approach all together. I thought about using CodeDom and scripting but found I would have to create an assembly for every rule, which would pollute the AppDomain, I could have over 1000 rules.



I am open to other options, maybe there is a better library out there.



ParameterExpression P = Expression.Parameter(typeof(InternalEvalData), _ParameterHeading);
LambdaExpression X = System.Linq.Dynamic.DynamicExpression.ParseLambda(new P , null, parsedExpression);
result = (bool)d.DynamicInvoke(testData);









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    up vote
    1
    down vote

    favorite












    I have users who will generate business rules via simple statements that result in true or false
    Example: Result > 10 AND Result < 100



    I am using Linq.Dynamic to convert these statements I am finding the ParseLambda is taking too long (simple example took 21ms). So I would like to save the Lambda Expression to the database to pull and use later. From my testing I have found the call to ParseLambda is taking the most time, therefore I am wondering if it is possible to serialize this Lambda Expression and persist to a database pulling it when needed. The idea is to have it saved to the database already parsed.



    Maybe this is the wrong approach all together. I thought about using CodeDom and scripting but found I would have to create an assembly for every rule, which would pollute the AppDomain, I could have over 1000 rules.



    I am open to other options, maybe there is a better library out there.



    ParameterExpression P = Expression.Parameter(typeof(InternalEvalData), _ParameterHeading);
    LambdaExpression X = System.Linq.Dynamic.DynamicExpression.ParseLambda(new P , null, parsedExpression);
    result = (bool)d.DynamicInvoke(testData);









    share|improve this question























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I have users who will generate business rules via simple statements that result in true or false
      Example: Result > 10 AND Result < 100



      I am using Linq.Dynamic to convert these statements I am finding the ParseLambda is taking too long (simple example took 21ms). So I would like to save the Lambda Expression to the database to pull and use later. From my testing I have found the call to ParseLambda is taking the most time, therefore I am wondering if it is possible to serialize this Lambda Expression and persist to a database pulling it when needed. The idea is to have it saved to the database already parsed.



      Maybe this is the wrong approach all together. I thought about using CodeDom and scripting but found I would have to create an assembly for every rule, which would pollute the AppDomain, I could have over 1000 rules.



      I am open to other options, maybe there is a better library out there.



      ParameterExpression P = Expression.Parameter(typeof(InternalEvalData), _ParameterHeading);
      LambdaExpression X = System.Linq.Dynamic.DynamicExpression.ParseLambda(new P , null, parsedExpression);
      result = (bool)d.DynamicInvoke(testData);









      share|improve this question













      I have users who will generate business rules via simple statements that result in true or false
      Example: Result > 10 AND Result < 100



      I am using Linq.Dynamic to convert these statements I am finding the ParseLambda is taking too long (simple example took 21ms). So I would like to save the Lambda Expression to the database to pull and use later. From my testing I have found the call to ParseLambda is taking the most time, therefore I am wondering if it is possible to serialize this Lambda Expression and persist to a database pulling it when needed. The idea is to have it saved to the database already parsed.



      Maybe this is the wrong approach all together. I thought about using CodeDom and scripting but found I would have to create an assembly for every rule, which would pollute the AppDomain, I could have over 1000 rules.



      I am open to other options, maybe there is a better library out there.



      ParameterExpression P = Expression.Parameter(typeof(InternalEvalData), _ParameterHeading);
      LambdaExpression X = System.Linq.Dynamic.DynamicExpression.ParseLambda(new P , null, parsedExpression);
      result = (bool)d.DynamicInvoke(testData);






      c# dynamic expression






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      asked Nov 10 at 20:41









      Steve S

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      94212



























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