I am trying to add some fields to a custom UserControl that I am making. I have some fields that I like them to be visible in the Properties window of Visual Studio. I tried to use the flags below but I dont see the field in the designer, even after a compile.
How should I do this correctly?
public partial class TosChartControl: UserControl
{
#region PUBLIC FIELDS
[Browsable(true)] //Added this but still does not show up
[Category("Data")]
[DefaultValue(0)]
[Description("ID of the Sensor Node")]
public int NodeId { get; set; }
#endregion
public TosChartControl()
{
InitializeComponent();
}
}
I did clean and rebuild the soloution and projects but I cant still see this field in Properties window. Even restarting the Visualstudio didnt help.
UPDATE: Your public properties are visible in the designer only when it's in another control in the designer. It turns out that you don't need to add this attribute, properties are visible by default in the designer. As far as I understand, when it's in another component's design view, an instance of the user control is created and properties can be shown. Sorry for misleading you in the beginning, I thought it was necessary to add it.
Try this attribute:
[Browsable(true)]
http://msdn.microsoft.com/en-us/library/system.componentmodel.browsableattribute.aspx
To elaborate on henginy's updated answer:
Be sure that you are looking at an instance of the control you want to modify properties for, and not the definition of the control itself.
To clarify, when you add a property to your TosChartControl class, you won't see the property in the TosChartControl.cs [Design] tab, you will see it where you implement a TosChartControl, such as your Form1.cs [Design] tab, e.g. the containing control to which you have added your custom control.
...Assuming that your Properties window is visible, and that you have the control selected.
What to take away from this lesson:
Understanding what the properties window is actually showing you — It's contextual.
The difference between the model and the implementation of the model — e.g. Designing the custom control and designing the form that uses the custom control.
Related
I know that getting the Form Designer to work is a ticklish business. Generics, x64, subtle problems with the project's XML... But perhaps someone can offer advice about my current problem, which is that a component I created that inherits from TabPage, when I try to view it in the designer shows up as a list of its controls, like this:
Thanks in advance.
You cannot make a TabPage as root of the designer, while you can do the same for a Panel or other container controls. The limitation is because, TabPage can only be hosted in TabControl, not even in the overlay control of the designer:
TabPage cannot be added to a
'System.Windows.Forms.Design.DesignerFrame+OverlayControl'. TabPages
can only be added to TabControls.
A control can be shown as root of the designer when the base class of the control has designer of type of DocumentDesigner. Form and UserControl are such controls which means when you create a new Form1:Form or new UserControl1:UserControl, since the base class derived from a designable control, then the class can be edited in the designer as root.
I believe you can handle your requirement by using UserControl, but for learning purpose (or as a workaround) if you want to make a control deriving from Panel designable, you can copy the following code in a code file:
public class MyControl: MyDesignableControl
{
}
[Designer(typeof(DocumentDesigner), typeof(IRootDesigner))]
public class MyDesignableControl : Panel
{
}
Then save it and then double click on it and you can see you can design it like a root control.
Then after you done with the design, change the Panel to TabPage.
Remarks on
DocumentDesigner
This designer is a root designer, meaning that it provides the
root-level design mode view for the associated document when it is
viewed in design mode.
You can associate a designer with a type using a
DesignerAttribute.
For an overview of customizing design time behavior, see Extending
Design-Time
Support.
I'll try to explain what I'm after. I don't know the technical term for it, so here goes:
Example 1:
If I place a ListView on a Form and add some columns I am able, in Design-Time, to click-and-drag the columns to resize them.
Example 2:
Now, I place a ListView in a UserControl and name it "MyCustomListView" (and perhaps add some method to enhance it somehow).
If I now place the "MyCustomListView" on a Form I am unable to click-and-drag the column headers to resize them in Design-Time.
Is there any way to easily make that happen? Some form of "pass the click-and-drag event to the underlying control and let that control do its magic". Im not really looking to recode, just pass on the mouseclick (or whatever it is) and let the, in this case, ListView react as it did in the first example above.
The Windows Forms designer has dedicated designer classes for most controls. The designer for a ListView is System.Windows.Forms.Design.ListViewDesigner, an internal class in the System.Design.dll assembly. This class gives you the ability to drag the column headers.
A UserControl uses the System.Windows.Forms.Design.ControlDesigner designer class. It doesn't do anything special, just puts a rectangle around the control with drag handles. You can see where this is heading: after you put your user control on a form, it is ControlDesigner that is used to design the class, ListViewDesigner is not in the picture. You thus lose the ability to drag the column headers. Also note that ControlDesigner doesn't give access to the controls inside the UC.
That's fixable however by creating your own designer. Start with Projects + Add Reference, select System.Design. You'll need to add a public property to the UC to expose the list view and apply the [DesignerSerializationVisibility] attribute to allow changed properties to be saved. And apply the [Designer] attribute to the UC class to replace the default designer. It all should resemble this (using the default names and a ListView that displays "employees"):
using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.Design; // Note: add reference required: System.Design.dll
namespace WindowsFormsApplication1 {
[Designer(typeof(MyDesigner))] // Note: custom designer
public partial class UserControl1 : UserControl {
public UserControl1() {
InitializeComponent();
}
// Note: property added
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
public ListView Employees { get { return listView1; } }
}
// Note: custom designer class added
class MyDesigner : ControlDesigner {
public override void Initialize(IComponent comp) {
base.Initialize(comp);
var uc = (UserControl1)comp;
EnableDesignMode(uc.Employees, "Employees");
}
}
}
The list view in the user control can now be clicked and designed as normal.
I'll try to explain what I'm after. I don't know the technical term for it, so here goes:
Example 1:
If I place a ListView on a Form and add some columns I am able, in Design-Time, to click-and-drag the columns to resize them.
Example 2:
Now, I place a ListView in a UserControl and name it "MyCustomListView" (and perhaps add some method to enhance it somehow).
If I now place the "MyCustomListView" on a Form I am unable to click-and-drag the column headers to resize them in Design-Time.
Is there any way to easily make that happen? Some form of "pass the click-and-drag event to the underlying control and let that control do its magic". Im not really looking to recode, just pass on the mouseclick (or whatever it is) and let the, in this case, ListView react as it did in the first example above.
The Windows Forms designer has dedicated designer classes for most controls. The designer for a ListView is System.Windows.Forms.Design.ListViewDesigner, an internal class in the System.Design.dll assembly. This class gives you the ability to drag the column headers.
A UserControl uses the System.Windows.Forms.Design.ControlDesigner designer class. It doesn't do anything special, just puts a rectangle around the control with drag handles. You can see where this is heading: after you put your user control on a form, it is ControlDesigner that is used to design the class, ListViewDesigner is not in the picture. You thus lose the ability to drag the column headers. Also note that ControlDesigner doesn't give access to the controls inside the UC.
That's fixable however by creating your own designer. Start with Projects + Add Reference, select System.Design. You'll need to add a public property to the UC to expose the list view and apply the [DesignerSerializationVisibility] attribute to allow changed properties to be saved. And apply the [Designer] attribute to the UC class to replace the default designer. It all should resemble this (using the default names and a ListView that displays "employees"):
using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.Design; // Note: add reference required: System.Design.dll
namespace WindowsFormsApplication1 {
[Designer(typeof(MyDesigner))] // Note: custom designer
public partial class UserControl1 : UserControl {
public UserControl1() {
InitializeComponent();
}
// Note: property added
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
public ListView Employees { get { return listView1; } }
}
// Note: custom designer class added
class MyDesigner : ControlDesigner {
public override void Initialize(IComponent comp) {
base.Initialize(comp);
var uc = (UserControl1)comp;
EnableDesignMode(uc.Employees, "Employees");
}
}
}
The list view in the user control can now be clicked and designed as normal.
I'm making some controls which all have to share the same look and some common behavior, although they are meant for different kind of inputs. So I made a BaseClass which inherit from UserControl, and all my controls inherit from BaseClass.
However, if i add controls for BaseClass in the designer, such as a TableLayoutPanel, i can't access them when I'm designing the inherited classes. I see the TableLayoutPanel, but even though he is "protected", i can't modify it or put controls in it through the designer. I've no trouble accesing it by code, but i don't want to lose the ability to use the designer.
Right now, i simply removed all controls from BaseClass, added the layout and all the common controls in each of the inherited class, then use references to manipulate them inside BaseClass. But that doesn't satisfy me at all. Is there a way to make the designer work with inherited protected member controls ?
Environment : C#, .NET 3.5, Visual Studio 2008
EDIT to answer SLaks's suggestion. I tried setting a property, and although I'm not used to use them it doesn't seem to work. Here is the code i tried :
public partial class UserControl1 : UserControl
{
public UserControl1()
{
InitializeComponent();
}
public TableLayoutPanel TableLayoutPanel1
{
get { return tableLayoutPanel1;}
set { tableLayoutPanel1 = value;}
}
}
public partial class UserControl2 : UserControl1
{
public UserControl2()
{
InitializeComponent();
}
}
When you try to access from the inherited control with the designer to the TableLayoutPanel declared in the base control, you're using a feature in WinForms called "Visual Inheritance".
Unfortunately TableLayoutPanel doesn't support visual inheritance:
http://msdn.microsoft.com/en-us/library/ms171689%28VS.80%29.aspx
That's why the TableLayoutPanel appears blocked in the inherited controls.
Try adding this attribute to the definition of the panel (this may or may not help):
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
You have to design the base controls on their own. Changes are reflected in the designer after you successfully rebuild the controls project. If you make the members public you can edit them but the changes won't persist.
Try making a ParentControlDesigner for your control, overriding InternalControlDesigner, and returning (designerHost.GetDesigner(tableLayoutPanel) as ControlDesigner). designerHost is (IDesignerHost) component.Site.GetService(typeof(IDesignerHost)).
I vaguely remember solving a similar problem by putting the base class it its own DLL and building it first. I've had a rummage but I can't find the project. Sorry.
I have a UserControl with some predefined controls (groupbox,button,datagridview) on it, these controls are marked as protected and the components variable is also marked as protected.
I then want to inherit from this base UserControl to another UserControl, however the DataGridView is always locked in the designer.
I suspect it may have something to do with the DataGridView implementing ISupportInitilize.
public class BaseGridDetail : UserControl
Has a DataGridView control (et al) defined.
public class InheritedDetail : BaseGridDetail
The DataGridView control is locked
Does anyone have any ideas how to make this control available in the designer after inheritenace?
By the looks of it, DataListView (and some other controls) do not support visual inheritance. There's a connect issue logged here which doesn't look hopeful.
There have been similar issues logged with other form controls, e.g. flowlayoutpanel.
I'm unable to find a way to force visual inheritance.
Here's the official answer on connect:
"For this particular release, the DataGridView was not designed to be used in visual intheritance. We will keep your suggestion in mind when we plan our future release"
That is of 26/05/2006.
Update: found this blog post which may have the answer
Edit: I was unable to verify the blog post's claims.
Looks like might be the latest on this issue
It looks like you can still manipulate the DataListView at runtime though, so you might be able to set visual properties (and other settings). It's not a great compromise.
[1] create Your Custom UserControl
[2] make your custom userControl use the below Inherited DataGridView:
[Designer(typeof System.Windows.Forms.Design.ControlDesigner))]
public class InheritedDataGridView : DataGridView { }
[3] Inherit from your Custom UserControl , And viola !!
[4] Ohh dont forget to add "System.Design" dll
Enjoy.
Add the datagrid to a panel control and set the modifiers of the panel and the datagrid to protected. This will all your inherited form design time access to the properties of the grid.
I left an answer but re-read your question and decided to delete it.
What is it about the DataGridView that you're trying to modify in the inherited control? It's columns? I've been able to do this by setting up a protected method in my base UserControl and passing the grid's column collection into it, like this:
// in base UserControl
public BaseGridDetail()
{
InitializeComponent();
InitGridColumns(dataGridView1.Columns);
}
protected virtual void InitGridColumns(DataGridViewColumnCollection columns)
{
columns.Clear();
}
Now your derived control can simply override that method, like so:
// in InheritedDetail
protected override void InitGridColumns(DataGridViewColumnCollection columns)
{
base.InitGridColumns(columns);
// add my own custom columns
}
Change property to defined [private] to [protected] defined at xx.designer.cs
which is originally machine generated code.
for example
private System.Windows.Forms.Button btnSave;
to
protected System.Windows.Forms.Button btnSave;
and rebuild it.
then you can change the property of inherited control.