Question

txtControl1

。每当用户添加以下自定义文本框之一时，其名称应默认为

txtControl

。

如何实现？

我的测试后，InamecReationservice确实可以实现您想要的效果。您可以参考以下步骤：1：基于.NET Framework的创建Windows表单控制库项目。

2：在项目中添加自定义控制类CustomTextBox：

using System.ComponentModel;
using System.Windows.Forms;

namespace CustomControlDemo
{
    // Specify the designer as the CustomTextBoxDesigner that we will implement later
    [Designer(typeof(CustomTextBoxDesigner))]
    public class CustomTextBox : TextBox
    {
        // You can add other custom logic here
    }
}

3：添加CustomTextBoxDesigner类以实现自定义设计器：

Answer 1

using System.ComponentModel;
using System.ComponentModel.Design;
using System.ComponentModel.Design.Serialization;
using System.Windows.Forms.Design;

namespace CustomControlDemo
{
    public class CustomTextBoxDesigner : ControlDesigner
    {
        public override void Initialize(IComponent component)
        {
            base.Initialize(component);

            IServiceContainer serviceContainer = (IServiceContainer)GetService(typeof(IServiceContainer));
            if (serviceContainer != null)
            {
                INameCreationService existingService = serviceContainer.GetService(typeof(INameCreationService)) as INameCreationService;
                if (!(existingService is CustomNameCreationService))
                {
                    serviceContainer.RemoveService(typeof(INameCreationService), true);
                    serviceContainer.AddService(typeof(INameCreationService), new CustomNameCreationService(), true);
                }
            }
        }
    }
}

4：添加CustomNamecReationservice类以实现自定义

using System;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Diagnostics;

namespace CustomControlDemo
{
    public class CustomNameCreationService : INameCreationService
    {
        public string CreateName(IContainer container, Type dataType)
        {
            Debug.WriteLine($"CreateName called for type: {dataType.Name}");

            if (container == null)
                throw new ArgumentNullException(nameof(container));
            if (dataType == null)
                throw new ArgumentNullException(nameof(dataType));

            string baseName = "txtControl";
            int index = 1;
            while (container.Components[baseName + index] != null)
            {
                index++;
            }

            string newName = baseName + index;
            Debug.WriteLine($"Generated name: {newName}");
            return newName;
        }

        public bool IsValidName(string name)
        {
            return !string.IsNullOrEmpty(name);
        }

        public void ValidateName(string name)
        {
            if (!IsValidName(name))
                throw new Exception("Invalid name: " + name);
        }
    }
}

5：保存文件并生成解决方案。创建一个新的Windows表单应用程序项目（.NET Framework），并刚刚引用控制库项目。打开表单设计师。从工具箱中查找CustomTextbox并将其拖放。

6：效应图：

要注意的是：与.NET Framework Legacy Designer不同，在Winforms Designer的.NET版本中，InameCreationService似乎未使用或未正确注册。