Export (0) Print
Expand All

AxHost.InvalidActiveXStateException Constructor (String, AxHost.ActiveXInvokeKind)

Initializes a new instance of the AxHost.InvalidActiveXStateException class and indicates the name of the member that referenced the ActiveX control and the kind of reference it made.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public InvalidActiveXStateException(
	string name,
	AxHost.ActiveXInvokeKind kind
)

Parameters

name
Type: System.String

The name of the member that referenced the ActiveX control while it was in an invalid state.

kind
Type: System.Windows.Forms.AxHost.ActiveXInvokeKind

One of the AxHost.ActiveXInvokeKind values.

The following code example overrides the constructor, and the SetAboutBoxDelegate and AttachInterfaces methods of an AxHost derived class that wraps the Microsoft Masked Edit ActiveX Control. This code requires that you have created the generated source code by running the AxImp.exe on the MSMask32.ocx file with the /source switch to generate the wrapper class to be edited. This code is only shown in C# syntax because that is the only language output by the AxImp.exe.

public AxMaskEdBox()
    :
  base("c932ba85-4374-101b-a56c-00aa003668dc") // The ActiveX control's class identifier.
{
    // Make the AboutBox method the about box delegate. 
    this.SetAboutBoxDelegate(new AboutBoxDelegate(AboutBox));
}

public virtual void AboutBox()
{
    // If the instance of the ActiveX control is null when the AboutBox method  
    // is called, raise an InvalidActiveXStateException exception. 
    if ((this.ocx == null))
    {
        throw new System.Windows.Forms.AxHost.InvalidActiveXStateException(
          "AboutBox", System.Windows.Forms.AxHost.ActiveXInvokeKind.MethodInvoke);
    }
    // Show the about box if the ActiveX control has one. 
    if (this.HasAboutBox)
    {
        this.ocx.AboutBox();
    }
}

protected override void AttachInterfaces()
{
    try
    {
        // Attach the IMSMask interface to the ActiveX control. 
        this.ocx = ((MSMask.IMSMask)(this.GetOcx()));
    }
    catch (System.Exception ex)
    {
        System.Console.WriteLine(ex.Message);
    }
}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Show:
© 2014 Microsoft