CODEWITHSUNDEEP
vb.netwinformsmultithreadinguser-interface
Austin Davis
Austin Davis

Reputation: 3756

Trouble Udating UI from a Seperate Thread

I've been messing around with the answer given here How to update the GUI from another thread in C#?

I'm getting the error Method 'System.Windows.Forms.Label' Text not found from the following code

Private Delegate Sub setControlPropertyThreadSafeDelegate(control As Control, propertyName As String, propertyValue As Object)

Public Sub setControlPropertyThreadSafe(control As Control, propertyName As String, propertyValue As Object)
    If control.InvokeRequired = True Then
        control.Invoke(New setControlPropertyThreadSafeDelegate(AddressOf setControlPropertyThreadSafe), New Object() {control, propertyName, propertyValue})
    Else
        control.GetType().InvokeMember(propertyName, Reflection.BindingFlags.SetProperty, Nothing, control, New Object() {control, propertyName, propertyValue}) 'This is where the error occurs
    End If
End Sub

From a separate thread I calling this method with the following line 

UI.setControlPropertyThreadSafe(UI.lblExcel, "Text", "Inserting Data into YTD Template")

Any help regarding this error will be much appreciated.

Upvotes: 0

Views: 101

Answers (1)

shf301
shf301

Reputation: 31404

The line

control.GetType().InvokeMember(propertyName, Reflection.BindingFlags.SetProperty, _
    Nothing, control, New Object() {control, propertyName, propertyValue})

Should be

control.GetType().InvokeMember(propertyName, Reflection.BindingFlags.SetProperty, _
    Nothing, control, New Object() {propertyValue})

The last parameter to InvokeMember is the parameter list for the method, which for a property setting is just the value you wish to set. The question you linked to has it correct.

Upvotes: 3

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