COM2PropertyPageUITypeConverter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / ComponentModel / COM2Interop / COM2PropertyPageUITypeConverter.cs / 1305376 / COM2PropertyPageUITypeConverter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

 
namespace System.Windows.Forms.ComponentModel.Com2Interop { 

    using Microsoft.Win32; 
    using System;
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Diagnostics; 
    using System.Drawing;
    using System.Drawing.Design; 
    using System.Runtime.InteropServices; 
    using System.Windows.Forms.Design;
 
    /// 
    /// 
    /// 
    internal class Com2PropertyPageUITypeEditor : Com2ExtendedUITypeEditor, ICom2PropertyPageDisplayService { 

        private Com2PropertyDescriptor propDesc; 
        private Guid guid; 

        public Com2PropertyPageUITypeEditor(Com2PropertyDescriptor pd, Guid guid, UITypeEditor baseEditor) : base(baseEditor){ 
            propDesc = pd;
            this.guid = guid;
        }
 
        /// 
        ///  
        ///     Takes the value returned from valueAccess.getValue() and modifies or replaces 
        ///     the value, passing the result into valueAccess.setValue().  This is where
        ///     an editor can launch a modal dialog or create a drop down editor to allow 
        ///     the user to modify the value.  Host assistance in presenting UI to the user
        ///     can be found through the valueAccess.getService function.
        /// 
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value) { 

            IntPtr hWndParent = UnsafeNativeMethods.GetFocus(); // Windows.GetForegroundWindow 
 
            try {
 

                ICom2PropertyPageDisplayService propPageSvc = (ICom2PropertyPageDisplayService)provider.GetService(typeof(ICom2PropertyPageDisplayService));

                if (propPageSvc == null) { 
                    propPageSvc = this;
                } 
 
                object instance = context.Instance;
 
                if (!instance.GetType().IsArray) {
                    instance = propDesc.TargetObject;
                    if (instance is ICustomTypeDescriptor) {
                        instance = ((ICustomTypeDescriptor)instance).GetPropertyOwner(propDesc); 
                    }
                } 
 
                propPageSvc.ShowPropertyPage(propDesc.Name, instance, propDesc.DISPID, this.guid, hWndParent);
 
            }
            catch (Exception ex1) {
                if (provider != null) {
                      IUIService uiSvc = (IUIService)provider.GetService(typeof(IUIService)); 
                      if (uiSvc != null){
                        uiSvc.ShowError(ex1, SR.GetString(SR.ErrorTypeConverterFailed)); 
                      } 
                }
            } 
            return value;
        }

        ///  
        /// 
        ///      Retrieves the editing style of the Edit method.  If the method 
        ///      is not supported, this will return None. 
        /// 
        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context) { 
            return UITypeEditorEditStyle.Modal;
        }

        public unsafe void ShowPropertyPage(string title, object component, int dispid, Guid pageGuid, IntPtr parentHandle){ 
            Guid[] guids = new Guid[]{pageGuid};
            IntPtr guidsAddr = Marshal.UnsafeAddrOfPinnedArrayElement(guids, 0); 
 
            object[] objs = component.GetType().IsArray ? (object[])component : new object[]{component};
 
            int nObjs =  objs.Length;
            IntPtr[] objAddrs = new IntPtr[nObjs];

            try { 
                for (int i=0; i < nObjs; i++) {
                    objAddrs[i] = Marshal.GetIUnknownForObject(objs[i]); 
                } 

                fixed (IntPtr* pAddrs = objAddrs) { 
                    SafeNativeMethods.OleCreatePropertyFrame(new HandleRef(null, parentHandle),
                                                             0, 0,
                                                             title,
                                                             nObjs, 
                                                             new HandleRef(null, (IntPtr)(long)pAddrs),
                                                             1, 
                                                             new HandleRef(null, guidsAddr), 
                                                             SafeNativeMethods.GetThreadLCID(),
                                                             0, IntPtr.Zero ); 
                }
            } finally {
                for (int i=0; i < nObjs; i++) {
                    if (objAddrs[i] != IntPtr.Zero) { 
                        Marshal.Release(objAddrs[i]);
                    } 
                } 
            }
        } 
    }

}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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