c# - 设计器不序列化 UserControl 的 DataGridView 属性的列

问题描述

我正在尝试创建一个包含标签、工具条和 Datagridview 的自定义控件。

当测试表单生成设计代码时，它会正确保存工具条项目，但不会保存 Datagridview 列。 代码 DGrid.cs

...
    [DesignerAttribute(typeof(MultiDesigner))]
    public partial class FDGrid : Panel
    {
        ....
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        [Category("Bars"), Description("Barra dei comandi.")]
        public ToolStrip Barra
        {
            get { return _barra; }
            set { _barra = value; }
        }
        
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        [Category("Grid"), Description("Griglia dati.")]
        public DataGridView Griglia
        {
            get { return _griglia; }
            set { _griglia = value; }
        }
        ....
        
    }
    
    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = 
        "FullTrust")]
    public class MultiDesigner : System.Windows.Forms.Design.ControlDesigner
    {
        public override void Initialize(IComponent c)
        {
            base.Initialize(c);
            FDGrid ctl = (FDGrid)c;
            EnableDesignMode(ctl.Griglia, "Griglia");
            EnableDesignMode(ctl.Barra, "Barra");
        }
    }
...

代码 FDGrid.Designer.cs

FDGrid.Designer.cs ....

private FDLabeledImage _titolo;
private ToolStrip _barra;
private DataGridView _griglia;
    

private void InitializeComponent()
{
    this._barra = new System.Windows.Forms.ToolStrip();
    this._griglia = new System.Windows.Forms.DataGridView();
    this._titolo = new FDControl.FDLabeledImage();
    ((System.ComponentModel.ISupportInitialize)(this._griglia)).BeginInit();
    this.SuspendLayout();
    ....
    ((System.ComponentModel.ISupportInitialize)(this._griglia)).EndInit();
    this.ResumeLayout(false);
}

……

代码Form1.Designer.cs

....    
            
            private void InitializeComponent()
            {
                this.fdGrid1 = new FDControl.FDGrid();  // OK
                this.fdGrid1.Column1 = new System.Windows.Forms.DataGridViewTextBoxColumn(); **// Error** 
                this.toolStripLabel1 = new System.Windows.Forms.ToolStripLabel(); //OK
                
            }
            
            ...
            private FDControl.FDGrid fdGrid1; //OK
            private System.Windows.Forms.ToolStripLabel toolStripLabel1; //OK
            private System.Windows.Forms.DataGridViewTextBoxColumnfdGrid1.Column1;//Error
...

帮助，我想了解我错在哪里？

标签： c#.netwinformscomponentswindows-forms-designer

解决方案

不是最优雅的，而是一个可行的解决方案：

创建一个MyDataGridView派生自的自定义DataGridView：

 using System;
 using System.ComponentModel;
 using System.ComponentModel.Design;
 using System.Drawing.Design;
 using System.Reflection;
 using System.Windows.Forms;
 using System.Windows.Forms.Design;
 public class MyDataGridView : DataGridView
 {
     [Editor(typeof(ExtendedDataGridViewColumnCollectionEditor), typeof(UITypeEditor))]
     public new DataGridViewColumnCollection Columns { get => base.Columns; }

     private class ExtendedDataGridViewColumnCollectionEditor : UITypeEditor
     {
         private Form dataGridViewColumnCollectionDialog;
         private ExtendedDataGridViewColumnCollectionEditor() { }
         private static Form CreateColumnCollectionDialog(IServiceProvider provider)
         {
             var assembly = Assembly.Load(typeof(ControlDesigner).Assembly.ToString());
             var type = assembly.GetType("System.Windows.Forms.Design.DataGridViewColumnCollectionDialog");
             var ctor = type.GetConstructors(BindingFlags.NonPublic | BindingFlags.Instance)[0];
             return (Form)ctor.Invoke(new object[] { provider });
         }
         public static void SetLiveDataGridView(Form form, DataGridView dgv)
         {
             var method = form.GetType().GetMethod("SetLiveDataGridView", BindingFlags.NonPublic | BindingFlags.Instance);
             method.Invoke(form, new object[] { dgv });
         }
         public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
         {
             if (provider != null && context != null)
             {
                 var service = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
                 if (service == null || context.Instance == null)
                     return value;

                 var host = (IDesignerHost)provider.GetService(typeof(IDesignerHost));
                 if (host == null)
                     return value;

                 if (dataGridViewColumnCollectionDialog == null)
                     dataGridViewColumnCollectionDialog = CreateColumnCollectionDialog(provider);

                 var dgv = ((MyDataGridView)context.Instance);
                 var oldSite = dgv.Site;
                 dgv.Site = ((MyDataGridView)context.Instance).Parent?.Site;
                 SetLiveDataGridView(dataGridViewColumnCollectionDialog, dgv);

                 using (var transaction = host.CreateTransaction("DataGridViewColumnCollectionTransaction"))
                 {
                     if (service.ShowDialog(dataGridViewColumnCollectionDialog) == DialogResult.OK)
                         transaction.Commit();
                     else
                         transaction.Cancel();
                 }
                 dgv.Site = oldSite;
             }
             return value;
         }
         public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
         {
             return UITypeEditorEditStyle.Modal;
         }
     }
 }

构建解决方案。
创建您的UserControl并在其上放置一个实例MyDataGridView。

暴露DataGridView属性：

 public partial class MyUserControl : UserControl
 {
     public MyUserControl()
     {
         InitializeComponent();
     }
     [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
     public DataGridView DataGridView { get => dataGridView1; }
 }

构建解决方案。
在表单上放置一个实例MyUserControl，然后在属性编辑器窗口中，找到DataGridView属性，展开它并编辑Columns并保存表单。

这些列现在已序列化。你去吧。

注意：自定义UITypeEditor基于此帖子，并进行了一些更改。

结果如下所示：

private void InitializeComponent()
{
    ...
    ...

    this.Column1 = new System.Windows.Forms.DataGridViewTextBoxColumn();
    this.Column2 = new System.Windows.Forms.DataGridViewTextBoxColumn();
    ((System.ComponentModel.ISupportInitialize)(this.myUserControl1.DataGridView)).BeginInit();
    this.SuspendLayout();
    // 
    // myUserControl1
    // 
    // 
    // 
    // 
    this.myUserControl1.DataGridView.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
    this.myUserControl1.DataGridView.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
    this.Column1,
    this.Column2});

    ...
    ...

    // 
    // Column1
    // 
    this.Column1.HeaderText = "Column1";
    this.Column1.MinimumWidth = 6;
    this.Column1.Name = "Column1";
    this.Column1.Width = 125;
    // 
    // Column2
    // 
    this.Column2.HeaderText = "Column2";
    this.Column2.MinimumWidth = 6;
    this.Column2.Name = "Column2";
    this.Column2.Width = 125;
    
    ...
    ...

    ((System.ComponentModel.ISupportInitialize)(this.myUserControl1.DataGridView)).EndInit();
    this.ResumeLayout(false);

}

...

private System.Windows.Forms.DataGridViewTextBoxColumn Column1;
private System.Windows.Forms.DataGridViewTextBoxColumn Column2;

...

c# - 设计器不序列化 UserControl 的 DataGridView 属性的列

问题描述

解决方案

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