F＃不能以交互方式在.net的WPF中使用datagrid

Question

My script is below:

#light

#r "WindowsBase"    
#r "PresentationCore"    
#r "PresentationFramework"

open System
open System.Windows
open System.Windows.Controls

let window = new System.Windows.Window(Name="Test",Width=500.0,Height=500.0)    
window.Visibility <- Visibility.Visible    
window.Show()    
let mutable wp = new System.Windows.Controls.DataGrid()

Initialize window is OK, but when i initialize a datagrid , there is a error:

graph.fsx(18,46): error FS0039: The type 'DataGrid' is not defined.

but when i put the mouse cursor over "System.Windows.Controls.DataGrid()", there is a pop-up window showing the definition of datagrid.

So what did i miss? How to use datagrid in F#.

Answer 1

When you reference the PresentationFramework assembly without specifying a version fsi will load the 3.0 version, which does not include the DataGrid. To reference the 4.0 version you can either use the fully qualified name:

#r "PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"

or you could use the full path to the assembly. On my system this is:

#r @"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\PresentationFramework.dll"   

Answer 2

From MSDN :

Namespace: System.Windows.Controls

Assembly: System.Windows.Controls.Data (in System.Windows.Controls.Data.dll)

You need to reference the correct assembly:

#r "System.Windows.Controls.Data"

Answer 3

我不确定在F＃2.0中导致此问题的原因是什么，但是在F＃3.0中似乎可以解决该问题。