C#界面控件数据绑定

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已于 2022-05-18 13:54:45 修改

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分类专栏： C# 文章标签： c# ui 开发语言

于 2022-05-18 13:47:47 首次发布

本文链接：https://blog.youkuaiyun.com/qq_43169363/article/details/124840777

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这个代码片段展示了如何在C#中实现控件与实体类的自动数据绑定。通过`DataBind`方法，可以将窗体上的控件（如TextBox、CheckBox等）直接与实体类的属性对应，实现数据展示和更新。提供了两种数据绑定模式，一种是常规的双向绑定，另一种是只读绑定。此外，还包含了获取窗体所有控件的辅助方法。

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Windows.Forms;

namespace AOI
{
    /// <summary>
    /// 控件绑定数据源
    /// </summary>
    class MyControlsDataBinding
    {
        /// <summary>
        /// 将界面控件绑定到实体类（控件名必须跟实体类的字段名相同）
        /// </summary>
        /// <param name="myparams">实体类</param>
        /// <param name="f">窗体</param>
        ///  <param name="dsup">数据绑定模式</param>
        public void DataBind(object myparams, Control f, DataSourceUpdateMode dsup)
        {
            Type type = myparams.GetType();
            PropertyInfo[] infos = type.GetProperties();
            allcontrols.Clear();
            Control[] fcontrols = GetAllControls(f);
            foreach (Control item in fcontrols)
            {
                foreach (PropertyInfo info in infos)
                {
                    if (item.Name == info.Name)
                    {
                        string controlproperty = PropertyFromControl(item);
                        item.DataBindings.Add(controlproperty, myparams, info.Name,true, dsup);
                    }
                }
            }
        }
        /// <summary>
        /// 绑定翻译类使用
        /// </summary>
        /// <param name="myparams"></param>
        /// <param name="f"></param>
        public void DataBind(object myparams, Control f)
        {
            Type type = myparams.GetType();
            PropertyInfo[] infos = type.GetProperties();
            allcontrols.Clear();
            Control[] fcontrols = GetAllControls(f);
            foreach (Control item in fcontrols)
            {
                foreach (PropertyInfo info in infos)
                {
                    if (item.Name == info.Name)
                    {
                        string controlproperty = PropertyFromControls(item);
                        item.DataBindings.Add(controlproperty, myparams, info.Name, false, DataSourceUpdateMode.Never);
                    }
                }
            }
        }
        /// <summary>
        /// 获取的控件列表
        /// </summary>
        public List<Control> allcontrols = new List<Control>();
        /// <summary>
        /// 获取指定控件（窗体）内所有控件
        /// </summary>
        /// <param name="f">指定控件（窗体）</param>
        /// <returns></returns>
        private Control[] GetAllControls(Control f)
        {
            foreach (Control item in f.Controls)
            {
                allcontrols.Add(item);
                if (item.Controls != null)
                {
                    GetAllControls(item);
                }
            }
            return allcontrols.ToArray();
        }
        /// <summary>
        /// 获取指定控件的指定属性
        /// </summary>
        /// <param name="control">指定控件</param>
        /// <returns></returns>
        public string PropertyFromControl(Control control)
        {
            string requestProperty = "Text";
            if (control is TextBox || control is Label)
            {
                requestProperty = "Text";
            }
            else if (control is CheckBox)
            {
                requestProperty = "Checked";
            }
            else if (control is NumericUpDown)
            {
                requestProperty = "Value";
            }
            else if (control is ComboBox)
            {
                requestProperty = "Text";
            }
            return requestProperty;
        }
        public string PropertyFromControls(Control control)
        {
            string requestProperty = "Text";
            if (control is TextBox || control is Label || control is CheckBox || control is GroupBox|| control is TreeView)
            {
                requestProperty = "Text";
            }
            else if (control is ComboBox)
            {
                requestProperty = "DataSource";
            }
            else if (control is DataGridView)
            {
                requestProperty = "DataSource";
            }

            return requestProperty;

        }
    }
}