Re: combining a textblock and textblock into one control - WPF Discussion Boards

24-Mar-12 13:25

I use a window for my main form and a page displayed in a navigation frame for my controls.

Never underestimate the power of human stupidity
RAH

Re: wpf main container

Abhinav S24-Mar-12 15:54

combining a textblock and textblock into one control

24-Mar-12 15:54

You can always take a look at the free WPF MDI at http://wpfmdi.codeplex.com/[^].

If you are fine with tabbed implementation, then Tabbed MDI in WPF[^] should be useful to you as well.

Re: wpf main container

MemberDotNetting30-Mar-12 22:24

MemberDotNetting

30-Mar-12 22:24

thank you very much, I already know the concept of mdicontainer but I thought this is not the same for implementation wpf thank you

Sutton Mehaffey23-Mar-12 19:58

Re: combining a textblock and textblock into one control

23-Mar-12 19:58

Using C# only, and not WPF, is there a way to tie a TextBlock and TextBox together so that if I put them in a ListBox, they both scroll together? This is assuming you can put two controls in a ListBox, which you might not be able to do. If not, how can I do this. I have got working my scrolling List of TextBoxes, but I want to put a Label at the front of each TextBox. Either by a string or by a TextBlock.

But, I want to do this on the fly in C# and not use any WPF. If possible.

Mycroft Holmes23-Mar-12 21:58

Re: combining a textblock and textblock into one control

23-Mar-12 21:58

Not sure about the listbox control but I would assume it will take a data template which means you should use a template with a grid/stackpanel and a textblock bound to a description field and the other textblock/box bound to the value field in your list.

Don't give me any crap about not wanting to do it in xaml, if that is the case then go back to winforms where you are meant to manipulate the view.

Never underestimate the power of human stupidity
RAH

Abhinav S24-Mar-12 0:10

Re: combining a textblock and textblock into one control

24-Mar-12 0:10

Mycroft Holmes wrote:

Don't give me any crap about not wanting to do it in xaml, if that is the case then go back to winforms

Well said!

Sutton Mehaffey24-Mar-12 5:37

Re: combining a textblock and textblock into one control

24-Mar-12 5:37

I don't use Winforms. And, I have my reasons for not wanting to do it in XAML.

Mycroft Holmes24-Mar-12 13:23

Re: combining a textblock and textblock into one control

24-Mar-12 13:23

I know you don't use winforms but the question goes against all the design principles of WPF. I'd be interested in the reasons for not wanting to use xaml.

I have found one and that is building a grid based on a pivot but there you don't know the number of columns.

Never underestimate the power of human stupidity
RAH

Sutton Mehaffey24-Mar-12 13:49

Re: combining a textblock and textblock into one control

24-Mar-12 13:49

I'm using a multilevel grid and I need to change the appearance of the grid on the fly based on a user selection. I probably could use WPF in some fashion, as I use it for other controls. But, on the fly would be better for my application. I'm under the impression that anything done in WPF can be done in straight C#.

Mycroft Holmes24-Mar-12 16:05

Re: combining a textblock and textblock into one control

24-Mar-12 16:05

Sutton Mehaffey wrote:
I'm under the impression that anything done in WPF can be done in straight C#.

While that is not 100% correct, there are some thing you probably can't do in code behind, it is 100% WRONG, WPF/Silverlight is ALL about the binding, until you embrace that you are going to struggle.

Never underestimate the power of human stupidity
RAH

Sutton Mehaffey26-Mar-12 14:27

Re: combining a textblock and textblock into one control

26-Mar-12 14:27

I got it working with Binding. Thanks. However, I have an unresolved issue concerning the binding.

I have a global array of zone descriptions[64]. Upon entering a window, the array is copied to a temp array of descriptions. The array is bound to to a List, which includes a zone number and the zone description (called zdentry - the description is named ZoneDesc). The user can edit the description, and I want to copy the change back into the temp description variable. But, I can't figure out where the change variable is. No form of zdentry or ZoneDesc is valid and creates errors. And, it won't let me 'set' anything in the ZoneDescEntry class either.

Any ideas? Thanks.

void CreateZoneDescTable()
        {
            List<ZoneDescEntry> zdentry = new List<ZoneDescEntry>();

            for (byte i = 0; i < 5; i++)
            {
                zdentry.Add(new ZoneDescEntry()
                {
                    ZoneNum = "Zone " + (i+1),
                    ZoneDesc = zonedescrip[i]
                });
            }

            if (GlobalVars.system_type == 'D')
            {
                for (byte i = 5; i < 64; i++)
                {
                    zdentry.Add(new ZoneDescEntry()
                    {
                        ZoneNum = "Zone " + (i+1),
                        ZoneDesc = zonedescrip[i]
                    });
                }
            }
            ZoneDescTable.ItemsSource = zdentry;
        }

        public class ZoneDescEntry
        {
            public string ZoneNum { get; set; }
            public string ZoneDesc { get; set; }
        }
}

Mycroft Holmes26-Mar-12 15:24

Re: combining a textblock and textblock into one control

26-Mar-12 15:24

Not sure how you are set up but you are not implementing OnPropertyChange on your model public class ZoneDescEntry and your collections are generic rather than ObservableCollection this indicates that there is no notification about any changes to your data.

I use a BaseModel class that implements INotifyPropertyChanged and the Model implements IEditableObject this give me control of the editing process and I get notification of the data changes.

My BaseModel

HTML

public abstract class BaseModel : INotifyPropertyChanged
{

    public BaseModel() { }
    #region Events
    /// <summary>
    /// PropertyChanged event.
    /// </summary>
    public event PropertyChangedEventHandler PropertyChanged;
    #endregion


    private bool _IsDataChanged;
    public bool IsDataChanged
    {
        get
        { return _IsDataChanged; }
        set
        {
            if (_IsDataChanged == value)
            {
                return;
            }
            var oldValue = _IsDataChanged;
            _IsDataChanged = value;
            OnPropertyChanged("IsDataChanged");
        }
    }

    public void OnPropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = this.PropertyChanged;

        if (handler != null)
        {
            if (propertyName != "IsDataChanged")
            { IsDataChanged = true; }

            handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }

    /// <summary>
    /// get a shallow copy of object of type T.
    /// objects with other object properties has not been tested.
    /// </summary>
    public static T ShallowCopy<T>(object objToCopy) where T : class, new()
    {
        if (objToCopy == null)
        { return null; }

        Type objType = typeof(T);
        object oValue;
        PropertyInfo oPropNew;
        T objNew = Activator.CreateInstance<T>(); //hence the new() contsraint
        //Debug.WriteLine(objType.Name + " = new " + objType.Name + "();");
        PropertyInfo[] oPInfos = objType.GetProperties();

        foreach (PropertyInfo oPInfo in oPInfos)
        {
            //may error if no mat
            oPropNew = objType.GetProperty(oPInfo.Name, BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);
            oValue = oPInfo.GetValue(objToCopy, null);

            oPropNew.SetValue(objNew, oValue, null);
        }
        return objNew;
    }

    public static T ReverseCopy<T>(object EditableObject, object SelectedObject) where T : class, new()
    {
        if (EditableObject == null)
        { return null; }
        Type objType = typeof(T);
        object oValue;
        //Debug.WriteLine(objType.Name + " = new " + objType.Name + "();");
        PropertyInfo[] oPInfos = objType.GetProperties();
        foreach (PropertyInfo oPInfo in oPInfos)
        {
            //may error if no match
            PropertyInfo oPropNew = objType.GetProperty(oPInfo.Name, BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);
            oValue = oPInfo.GetValue(EditableObject, null);
            oPropNew.SetValue(SelectedObject, oValue, null);
        }
        return (T)SelectedObject;
    }
}

The Model class

HTML

public class ZoneDescEntryDB : BaseModel, IEditableObject
{

    private string _ZoneNum;
    public string ZoneNum
    {
        get
        { return _ZoneNum; }
        set
        {
            if (_ZoneNum == value)
            {
                return;
            }
            var oldValue = _ZoneNum;
            _ZoneNum = value;
            base.OnPropertyChanged("ZoneNum");
        }
    }

    private string _ZoneDesc;
    public string ZoneDesc
    {
        get
        { return _ZoneDesc; }
        set
        {
            if (_ZoneDesc == value)
            {
                return;
            }
            var oldValue = _ZoneDesc;
            _ZoneDesc = value;
            base.OnPropertyChanged("ZoneDesc");
        }
    }

    #region                                             Edit methods
    private ZoneDescEntryDB Backup { get; set; }
    public void BeginEdit()
    {
        Backup = ShallowCopy<ZoneDescEntryDB>(this);
        IsDataChanged = false;
    }

    public void EndEdit()
    {
        Backup = null;
        IsDataChanged = false;
    }

    public void CancelEdit()
    {
        ReverseCopy<ZoneDescEntryDB>(Backup, this); Backup = null;
        IsDataChanged = false;
    }
    #endregion Edit methods

}

Never underestimate the power of human stupidity
RAH

Sutton Mehaffey26-Mar-12 16:01

Re: combining a textblock and textblock into one control

26-Mar-12 16:01

Thanks. I'm going to try to implement your code in some fashion. I had tried the INotifyPropertyChanged, but couldn't get it to work, because I couldn't figure out where the new value was and how to store that new value in my zonedescrip[zonenum] array.

My code should be a little simpler. The Zone number never changes (a zone is a zone). The description is the only thing that can change. And, when it does, it goes back into a zonedescrip[zonenum] array. When the user clicks on a SAVE button, the zonedescrip array gets saved into a permanent place.

I need to figure out how your Edit calls work. Maybe I don't even need a temporary zonedecrip array. Just use the permanent array as the Source and copy back to the permanent array when the user clicks on SAVE. During what part of the user editing process do the BeginEdit, EndEdit, and CancelEdit methods get called?

Abhinav S24-Mar-12 0:25

Prism and Login Page problem

24-Mar-12 0:25

You can always fetch the ListBox control using VisualTreeHelper and then set its items to Labels intead of TextBoxes.

gio_ab23-Mar-12 3:25

gio_ab

23-Mar-12 3:25

I am developing a SL4 app by applying PRISM and MVVM pattern. I'd want to make users authenticate with username and password credentials before loading the shell (a common scenario), I want to show the login page, but after bootstrapper starts, because I want to use my Authentication Service, thats registered with container, and if user authenticates then to show the shell.

Re: Prism and Login Page problem

Abhinav S23-Mar-12 17:27