SQL Server Reporting Services - Report Expressions Execution - sql-server

Question

Say I have the following expression:
=DateAdd(DateInterval.Year,-1,Today())
Is there a SQL Server web service endpoint that'll allow me to pass in an expression and return the result of the executed expression? I looked through the endpoints listed here but couldn't find one.
Or is there another way to evaluate this expression?

Answer 1

I've found another way to evaluate the expression using VB.net (This assumes that #Wolfgang Kais is correct about VB.net use instead of VBA)
Here is the code snippet:
using System;
using System.CodeDom.Compiler;
using System.Text;
using Microsoft.VisualBasic;
namespace VbStringCompiler
{
internal class Program
{
public static void Main(string[] args)
{
new Program();
}
private const string CRLF = "\r\n";
private Program()
{
var vbCodeProvider = new VBCodeProvider();
var compilerParameters = new CompilerParameters();
compilerParameters.ReferencedAssemblies.Add("Microsoft.VisualBasic.dll");
compilerParameters.ReferencedAssemblies.Add("System.dll");
compilerParameters.CompilerOptions = "/t:library";
compilerParameters.GenerateInMemory = true;
var stringBuilder = new StringBuilder();
stringBuilder.Append("Imports Microsoft.VisualBasic" + CRLF);
stringBuilder.Append("Imports System" + CRLF + CRLF);
stringBuilder.Append("Namespace Evaluate" + CRLF);
stringBuilder.Append("Class RunTime" + CRLF);
stringBuilder.Append("Public Function Run() As Object" + CRLF);
// insert code to return
stringBuilder.Append("Return DateAdd(DateInterval.Year, -1, Today())" + CRLF);
stringBuilder.Append("End Function" + CRLF);
stringBuilder.Append("End Class" + CRLF);
stringBuilder.Append("End Namespace" + CRLF);
try
{
var compilerResults =
vbCodeProvider.CompileAssemblyFromSource(compilerParameters, stringBuilder.ToString());
if (compilerResults.Errors.Count > 0)
{
foreach (CompilerError compilerError in compilerResults.Errors)
{
Console.Error.WriteLine(compilerError.ToString());
}
return;
}
var instance = compilerResults.CompiledAssembly.CreateInstance("Evaluate.RunTime");
var methodInfo = instance.GetType().GetMethod("Run");
var methodReturn = methodInfo.Invoke(instance, null);
Console.WriteLine(methodReturn);
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
}
}
}
}