运算符&#39;==&#39;与使用DynamicExpression.ParseLambda的操作数类型&#39;Guid&#39;和&#39;Guid&#39;不兼容<T, bool>

Question

I'm Using Dynamic Linq library and there is Source code and basic docu and the Nuget version

PM> Install-Package DynamicLINQ

I'm trying to construct a where clause that involves Guids

I have tried with the string "Id == @0" . The parameter array is just an object[] with the value ( Guid xxxx )

  var whereClauseSB = BuildLogicalKeyWhereClause2(entity, logicalKey);  //build string
  var parms = BuildParamArray(entity, logicalKey); // object[]
  var whereLambda = Ofsi.Bos.Core.DynamicExpression.ParseLambda<T, bool>(whereClauseSB.ToString(),parms);  //parse

an exception is thrown in DynamicExpression.ParseLambda

Operator '==' incompatible with operand types 'Guid' and 'Guid'

• I have also tried with GUID and String.(fail)
• I tried with and "Id = @0" (fail).
• String == string works, as does Int32==int32 but not Guid == Guid does not

Any ideas?

Answer 1

尝试在字符串中使用Equals方法而不是==运算符：

"Id.Equals(@0)"