Question

我正在创建一个List＆lt;＆gt;我做了一个测试课。然后我将其转换为数组并将其分配给propertygrid控件。

    List<Test> lc_Test;
    public class Test : UserControl
    {
        [Category("lc_Test"), Description("Testing using List<>, for storage."), DisplayName("Images")]
        public Image img { get; set; }
    }

    // Above in Form1(), I create it
    // lc_Test = new List<Test>();

    private void button7_Click(object sender, EventArgs e)
    {
        lc_Test.Clear();

        lc_Test.Add(new Test());
        lc_Test.Add(new Test());

        lc_Test[0].img = pb1.Image;
        lc_Test[1].img = pb2.Image;

        MessageBox.Show(lc_Test.Count.ToString());

        pgTest.SelectedObject = lc_Test.ToArray();
    }

如图所示，它有效：

我现在想知道，如果有任何方法可以更改每个项目的显示名称。因为，它将它们命名为“（0）”和“（1）”。在这个测试中，我想改变它说。 “测试项目0”和“测试项目1”。我还需要更改每个项目的“帮助文本”。必须成为一种方式。

任何人，需要我的任何信息让我知道。

Answer 1

<强>解决方案：

您的form1.cs代码文件：

using System;
using System.Windows.Forms;

namespace PropertyGridSample
{
    public class Form1 : System.Windows.Forms.Form
    {
        Layers layers_test;

        internal System.Windows.Forms.PropertyGrid PropertyGrid1;

        private System.ComponentModel.Container components = null; //Required designer variable

        public Form1()
        {
            InitializeComponent();

            layers_test = new Layers();
            PropertyGrid1.SelectedObject = layers_test;
        }

        // Clean up any resources being used
        protected override void Dispose( bool disposing )
        {
            if (disposing) { if (components != null) { components.Dispose(); } }

            base.Dispose( disposing );
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
            this.PropertyGrid1 = new System.Windows.Forms.PropertyGrid();
            this.SuspendLayout();
            // 
            // PropertyGrid1
            // 
            this.PropertyGrid1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
            | System.Windows.Forms.AnchorStyles.Left) 
            | System.Windows.Forms.AnchorStyles.Right)));
            this.PropertyGrid1.LineColor = System.Drawing.SystemColors.ScrollBar;
            this.PropertyGrid1.Location = new System.Drawing.Point(0, -1);
            this.PropertyGrid1.Name = "PropertyGrid1";
            this.PropertyGrid1.PropertySort = System.Windows.Forms.PropertySort.Alphabetical;
            this.PropertyGrid1.Size = new System.Drawing.Size(408, 254);
            this.PropertyGrid1.TabIndex = 1;
            this.PropertyGrid1.ToolbarVisible = false;
            this.PropertyGrid1.SelectedGridItemChanged += new System.Windows.Forms.SelectedGridItemChangedEventHandler(this.PropertyGrid1_SelectedGridItemChanged);
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(408, 254);
            this.Controls.Add(this.PropertyGrid1);
            this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
            this.MaximizeBox = false;
            this.Name = "Form1";
            this.Text = "Customizing Collections in Property Grid Demo";
            this.ResumeLayout(false);

        }
        #endregion

        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        private void PropertyGrid1_SelectedGridItemChanged(object sender, SelectedGridItemChangedEventArgs e)
        {
            PropertyGrid1.Refresh();
        }
    }
}

我创建了一个单独的cs文件，名为LayerCollection.cs：

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;

namespace PropertyGridSample
{
    [TypeConverter(typeof(LayerConverter))]
    public class Layer
    {
        public Image image { get; set; }

        public Layer() { }
    }

    public class Layers
    {
        LayerCollection layercollection = new LayerCollection();

        public Layers()
        {
            Layer[] layz = new Layer[2];

            Layer lay1 = new Layer(); Layer lay2 = new Layer(); //Create two test layers and add them to the layer collection

            layercollection.Add(lay1); layercollection.Add(lay2);
        }

        [TypeConverter(typeof(LayerCollectionConverter))]
        public LayerCollection Layer_Collection { get { return layercollection; } }
    }

    public class LayerCollection : CollectionBase, ICustomTypeDescriptor
    {
        #region collection impl
            public void Add(Layer lay) { List.Add(lay); } //Adds a layer object to the collection
            public void Remove(Layer lay) { List.Remove(lay); } //Removes a layer object from the collection

            public Layer this[int index] { get { return (List.Count > -1 && index < List.Count) ? (Layer)List[index] : null; } } //Return a layer object at index position
        #endregion

        #region ICustomTypeDescriptor impl 
            public AttributeCollection GetAttributes() { return TypeDescriptor.GetAttributes(this, true); }

            public String GetClassName() { return TypeDescriptor.GetClassName(this, true); }
            public String GetComponentName() { return TypeDescriptor.GetComponentName(this, true); }

            public TypeConverter GetConverter() { return TypeDescriptor.GetConverter(this, true); }

            public EventDescriptor GetDefaultEvent() { return TypeDescriptor.GetDefaultEvent(this, true); }
            public PropertyDescriptor GetDefaultProperty() { return TypeDescriptor.GetDefaultProperty(this, true); }

            public EventDescriptorCollection GetEvents(Attribute[] attributes) { return TypeDescriptor.GetEvents(this, attributes, true); }
            public EventDescriptorCollection GetEvents() { return TypeDescriptor.GetEvents(this, true); }

            public object GetEditor(Type editorBaseType) { return TypeDescriptor.GetEditor(this, editorBaseType, true); }
            public object GetPropertyOwner(PropertyDescriptor pd) { return this; }

            //Called to get the properties of this type. Returns properties with certain attributes. this restriction is not implemented here.
            public PropertyDescriptorCollection GetProperties(Attribute[] attributes) { return GetProperties(); }

            //Called to get the properties of this type.
            public PropertyDescriptorCollection GetProperties()
            {            
                PropertyDescriptorCollection pds = new PropertyDescriptorCollection(null); // Create a collection object to hold property descriptors

                // Iterate the list of layers and create a property descriptor for each layer item and add to the property descriptor collection
                for (int i = 0; i < this.List.Count; i++) { LayerCollectionPropertyDescriptor pd = new LayerCollectionPropertyDescriptor(this, i); pds.Add(pd); }

                return pds; // return the descriptor collection
            }
        #endregion
    }

    class LayerConverter : ExpandableObjectConverter
    {
        public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destType)
        {
            return (destType == typeof(string) && value is Layer) ? "Layer Data": base.ConvertTo(context, culture, value, destType);
        }
    }

    class LayerCollectionConverter : ExpandableObjectConverter
    {
        public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destType)
        {
            return  (destType == typeof(string) && value is LayerCollection) ? "Items": base.ConvertTo(context, culture, value, destType);
        }
    }

    public class LayerCollectionPropertyDescriptor : PropertyDescriptor
    {
        private LayerCollection collection = null;
        private int index = -1;

        public LayerCollectionPropertyDescriptor(LayerCollection coll, int idx) : base("#" + idx.ToString(), null)
        {
            collection = coll; index = idx;
        }

        public override AttributeCollection Attributes { get { return new AttributeCollection(null); } }

        public override bool CanResetValue(object component) { return true; }
        public override bool IsReadOnly { get { return false; } }
        public override bool ShouldSerializeValue(object component) { return true; }

        public override string Description { get { return "Layer Description"; } }
        public override string DisplayName { get { return "Layer " + index.ToString(); } }
        public override string Name { get { return "#" + index.ToString(); } }

        public override object GetValue(object component) { return collection[index]; }

        public override Type ComponentType { get { return collection.GetType(); } }
        public override Type PropertyType { get { return collection[index].GetType(); } }

        public override void ResetValue(object component) { }
        public override void SetValue(object component, object value) { } // this.collection[index] = value;
    }
}

在您的表单上，您只需要在其上抛出一个propertygrid。我仍在寻找改进它的方法，并且需要能够在内置的集合编辑器中捕获添加和删除按钮

更改propertygrid中的显示名称

1 个答案: