具有Checklistbox的usercontrol的属性窗口中的自定义属性。 [英] Custom property in property window for usercontrol with Checklistbox.

问题描述

你好，



我已经建立了一个用户控件，我希望在其属性窗口中有一个自定义属性。



有两项要求需要填写：



1.财产应显示 检查清单框 以便用户可以在设计时选择所需的值。



2.此属性的值应该来自 - 表单上有多少类似的用户控件。



例如：如果我在表单上插入一个usercontrol（即 usercontrol_1 ），然后我在同一表格上再添加两个类似用户控件的实例（即 usercontrol_2 & usercontrol_3 ）。



现在当我设置usercontrol1的自定义属性时，它应该有一个下拉列表框，其值为usercontrol_2& usercontrol_3。简而言之，我想将一个用户控件与另一个类似的用户控件链接起来。



注意：

一旦我在表单上添加新的usercontrol，属性的checklistbox就会自动填充。



如果有人有解决方案请帮忙。



谢谢&问候，

Siddharth

Hello,

I have made a user control for which i want to have a custom property in its "Properties" window.

There are two requirements to be fullfilled :

1. Property should show a check list box so that user can select the desired values at the design time.

2. The values for this property should come from - how many similar user controls are present on the form.

for example : If i insert one usercontrol on the form (i.e usercontrol_1), then I add two more instance of similar usercontrols(i.e usercontrol_2 & usercontrol_3) on the same form.

Now when I set the custom property of usercontrol1, it should have a dropdown checklistbox with the values usercontrol_2 & usercontrol_3. So in short, I want to link one user control with another similar usercontrol.

Note:
the checklistbox of the property should automatically populate as soon as I add new usercontrol on the form.

Please help if someone have solution for this.

Thanks & regards,
Siddharth

推荐答案

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Design;
using System.Windows.Forms.Design;

namespace WindowsFormsApplication12
{
    public partial class UserList : UserControl //Made one usercontrol name userlist.
    {
        public UserList()
        {
            InitializeComponent();
        }

        Control ParentForm; // declared one control
       List<Control> objControlList = new List<Control>();
       

       private void UserList_Load(object sender, EventArgs e)
       {
           ParentForm = this.Parent; // Parent form equals to the form or container on which usercontrol is placed.
           GetAllControls(ParentForm); // Method declared below: Gives list of all 'userlist' usercontrol present on the Parentform
           UserControlEditor.PropertyCopyControlList = objControlList;
           label1.Text = Convert.ToString(UserControlEditor.PropertyCopyControlList.Count);
       }


        private void GetAllControls(Control container) //Gives list of all 'userlist' usercontrol present on the Parentform
       {
           foreach (Control c in container.Controls)
           {
               GetAllControls(c);
               if (c is UserList) objControlList.Add(c);
           }
       }

        bool[] objbool = new bool[5];
       [Description("Items in the lisbox"), Editor(typeof(UserControlEditor), typeof(UITypeEditor))]
        public bool[] NoOfUserlistsOnForm // Made a custom property to have a checklist box in Properties window to set value for this property .
        {
            get 
            {
                return objbool;
            }
            set 
            {
                objbool = value;
                {
                    for (int i = 0; i < (objControlList.Count); i++)
                   {
                        if (objbool[i] != false)
                        {
                            listBox1.Items.Add(objControlList[i].Name);
                        }
                    }
                }
            }
        }
 
    }

//--------------------------------------------------------------------------------------------------------------------------------------------------------


    class UserControlEditor : UITypeEditor // Declared a class to have a checklist box in properties window of usercontrol
    {        
        public UserControlEditor() 
        {       
            
        }

        public static List<Control> CopyControlList = new List<Control>();
        public static List<Control> PropertyCopyControlList
        {
            get { return CopyControlList; }
            set { CopyControlList = value; }
        }

        public override UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)
        {
            return UITypeEditorEditStyle.DropDown;
        }

        
        public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object value)
        {
            //use IWindowsFormsEditorService object to display a control in the dropdown area
            IWindowsFormsEditorService frmsvr = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));

            if (frmsvr == null)
                return null;
            CheckedListBox Clbox = new CheckedListBox();
            //Here I have to populate the checklistbox with the code - Clbox.Items.Add(objectName)
            // But how get the ControlList (which is declared in the userlist class) to this class(UserControlEditor).
            for (int i = 0; i < PropertyCopyControlList.Count; i++)
            {
                Clbox.Items.Add(PropertyCopyControlList[i].Name);
            }

            var es = provider.GetService(typeof(System.Windows.Forms.Design.IWindowsFormsEditorService)) as System.Windows.Forms.Design.IWindowsFormsEditorService;

            es.DropDownControl(Clbox);

            if (es != null)
            {
                var data = value as bool[];
                if (data != null)
                {
                    for (int i = 0; i < Math.Min(data.Length, Clbox.Items.Count); i++)
                    {
                        Clbox.SetItemChecked(i, data[i]);
                    }
                }
                es.DropDownControl(Clbox);
            }

            var result = new bool[5];
            for (int i = 0; i < Clbox.Items.Count; i++)
            {
                result[i] = Clbox.GetItemChecked(i);
            }
            return result;
        }
    }
}

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