# Method execution improvements, HasMethod() / HasType()
**URL:** https://forum.alternetsoft.com/t/method-execution-improvements-hasmethod-hastype/520
**Category:** AlterNET Studio Support
**Tags:** scripter
**Created:** [January 21, 2026, 8:01am UTC](https://forum.alternetsoft.com/t/method-execution-improvements-hasmethod-hastype/520 "2026-01-21T08:01:14Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@tsp\_extern\_pa](https://forum.alternetsoft.com/u/tsp_extern_pa)
#### Post date: [January 21, 2026, 8:01am UTC](https://forum.alternetsoft.com/t/method-execution-improvements-hasmethod-hastype/520/1 "2026-01-21T08:01:14Z")
When using IScriptHost.RunMethod() or IScriptRun.RunMethod() there is no guarantee that the class or method does exists in the script.
If a class or method does not exists, there will is no exception thrown or indicator that the method was not run at all. Just no code is executed.
Is there a way to lookup a method / class beforehand, so that i can check if those exists? Like IScriptHost.HasMethod(string methodName) and IScriptRun.HasMethod(string methodName)?
In addition having a IScriptRun.HasType(Type type) / IScriptRun.HasType(string typeName) would be useful too.
Of course the best way in my oppinion would be that the RunMethod() throws an Exception or returns either a Error State or the resulting type. For that something like OneOf\<\> would be perfect. In addition you could add another signature for RunMethod() and RunMethodAsync() that allows to set a generic for the resulting type.
For the moment, is there a workaround for looking up the method in the AST?
---
### Author:  [@generalloki](https://forum.alternetsoft.com/u/generalloki)
#### Post date: [January 21, 2026, 3:07pm UTC](https://forum.alternetsoft.com/t/method-execution-improvements-hasmethod-hastype/520/2 "2026-01-21T15:07:29Z")
We have already implemented `HasMethod` and `FindMethod` in the master branch and will include this feature in the next build. As for `HasType` and the generic version of `RunMethod`, I will study them and respond to you shortly. In the meantime, you can use the `ScriptAssembly` property after you compile the script. This property allows you to access any script method or property via reflection.
Here is an example for VB:
```vb
Dim assembly = ScriptRun1.ScriptHost.ScriptAssembly
Dim inst = assembly.CreateInstance("ScriptSpace.ScriptClass")
Dim propInfoShared = inst.GetType().GetProperty("GlobalProp")
propInfoShared.SetValue(Nothing, "new shared value from main app")
Dim valShared = propInfoShared.GetValue(Nothing)
Dim propInfoInstance = inst.GetType().GetProperty("InstanceProp")
propInfoInstance.SetValue(inst, "new instance value from main app")
Dim valInstance = propInfoInstance.GetValue(inst)
```
In script:
```vb
Imports System
Imports System.Drawing
Imports System.Diagnostics
Imports System.Windows.Forms
Imports Microsoft.VisualBasic
Namespace ScriptSpace
Partial Public Class ScriptClass
Public Shared ReadOnly Property SharedDefault As ScriptClass = New ScriptClass()
' Instance field initialized inline
Private count As Integer = 5
' Shared (static) field initialized inline
Public Shared globalVar As String = "olala"
' Compile-time constant
Public Const Pi As Double = 3.14159265358979
Public Shared Property GlobalProp As String
Get
Return globalVar
End Get
Set(value As String)
globalVar = value
End Set
End Property
Public Property InstanceProp As String
Get
Return globalVar
End Get
Set(value As String)
globalVar = value
End Set
End Property
' Read-only field - can be initialized inline or in the constructor
Private ReadOnly createdAt As Date = Date.UtcNow
Public Shared Sub Main(text As String)
MsgBox("Main app says: " & text & " and " & globalVar)
External.X = 10
External.MainWindowText = "Text set from ScriptClass"
End Sub
Public Shared Function GetData() As Integer
Return External.X
End Function
End Class
End Namespace
```
---
### Author:  [@generalloki](https://forum.alternetsoft.com/u/generalloki)
#### Post date: [January 21, 2026, 3:15pm UTC](https://forum.alternetsoft.com/t/method-execution-improvements-hasmethod-hastype/520/3 "2026-01-21T15:15:22Z")
We have also added an additional parameter to `RunMethod` that specifies whether to throw an exception when the method is not found. This feature will also be available in the next build. I will post an update here when the new build is available and on how we will proceed with the other features you requested.
---
### Author:  [@generalloki](https://forum.alternetsoft.com/u/generalloki)
#### Post date: [January 22, 2026, 7:42am UTC](https://forum.alternetsoft.com/t/method-execution-improvements-hasmethod-hastype/520/4 "2026-01-22T07:42:52Z")
In the new build we also added HasType and FindType. See the FindType source code for an example of how to work with ScriptAssembly property.
```cs
///
/// Determines whether a type with the specified name exists in the script assembly.
///
/// The name of the type to locate. This value is case-sensitive and cannot be null or empty.
/// true if a type with the specified name exists; otherwise, false.
public virtual bool HasType(string typeName, bool ignoreCase = false)
{
return FindType(typeName, ignoreCase: ignoreCase) != null;
}
///
/// Searches for a type with the specified name in the script assembly and returns its metadata if found.
///
/// The fully qualified name of the type to locate. Cannot be null or empty.
/// true to ignore case when searching for the type; otherwise, false.
/// Optional. Default is false.
/// true to throw an exception if the type is not found; otherwise, false.
/// Optional. Default is false.
/// A object representing the type with the specified name, or null if the type is not found.
public virtual Type FindType(string typeName, bool throwOnError = false, bool ignoreCase = false)
{
return Compiled || Compile() ? FindTypeInternal() : null;
Type FindTypeInternal()
{
var assembly = ScriptAssembly;
if (assembly == null)
return null;
return assembly.GetType(typeName, throwOnError: throwOnError, ignoreCase: ignoreCase);
}
}
```
---
### Author:  [@tsp\_extern\_pa](https://forum.alternetsoft.com/u/tsp_extern_pa)
#### Post date: [January 22, 2026, 10:27am UTC](https://forum.alternetsoft.com/t/method-execution-improvements-hasmethod-hastype/520/5 "2026-01-22T10:27:13Z")
Awesome, thats exactly what i was looking for. Thanks for adding that.
---
### Author:  [@generalloki](https://forum.alternetsoft.com/u/generalloki)
#### Post date: [February 6, 2026, 4:54am UTC](https://forum.alternetsoft.com/t/method-execution-improvements-hasmethod-hastype/520/6 "2026-02-06T04:54:41Z")
We have just released Alternet.Studio build 10.0.7, which includes the features you requested. You will shortly receive a notification about the library update.