/// <summary>
/// Adds a method to the dynamic class beeing generated.
/// </summary>
/// <param name="code"></param>
/// <param name="item"></param>
private static void AppendMethod(StringBuilder code, EvaluatorItem item)
{
code.AppendFormat(" public {0} {1}() ", item.ReturnType.Name, item.Name);
code.Append("{ ");
code.AppendFormat(" return ({0}); ", item.Expression);
code.Append("}\n");
}
/// <summary>
/// Generates the code for the dynamic class to be compiled.
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
private static String GetDynamicClassCode(EvaluatorItem item)
{
var code = new StringBuilder();
AppendClassHeader(code);
AppendMethod(code, item);
code.Append("} }");
return(code.ToString());
}
/// <summary>
/// Evaluates the givenn expression.
/// </summary>
/// <returns></returns>
public static Object Evaluate(EvaluatorItem item)
{
var loSetup = new AppDomainSetup {
ApplicationBase = AppDomain.CurrentDomain.BaseDirectory
};
var evaluationDomain = AppDomain.CreateDomain("ExpressionEvaluationContextDomainfda", null, loSetup);
try
{
evaluationDomain.SetData("item", item);
evaluationDomain.DoCallBack(EvaluateExpression);
var result = evaluationDomain.GetData("result");
return(result);
}
finally
{
AppDomain.Unload(evaluationDomain);
}
}
