[WinForm] 使用反射将业务对象绑定到窗体或控件容器

2020-11-16 06:10

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标签：winform com http blog style class div img code java c

    在WebForm中，可以使用反射将业务对象绑定到 ASP.NET 窗体控件。最近做Winform项目，也参考WebForm中的代码实现同样的功能。
    Winform没有提供类似WebForm中的FindControl方法，我于是用遍历控件的方式，写了一个类似WebForm中的这个方法，考虑到Winform中的很多控件放在Label、TabControl中，方法采用了递归的方式。
    Winform和Winform的控件也有些区别，如在Winform中，DateTimePicker取值是用Value属性，在WebForm中使用 SelectDate属性，在Winform中，有NumericUpDown控件，取值也是用Value属性，因此，具体绑定方式上也和WebForm 中有些区别。

////代码如下：
using System;
using System.Windows.Forms;
using System.Reflection;
using System.Collections;

namespace BindTest
{

    public sealed class FormBinding
    {
        /// 
        /// 将业务对象绑定到窗体或控件容器
        /// 
        /// 业务对象
        /// 窗体或控件容器
        public static void BindObjectToControls(object obj, Control container)
        {
            if (obj == null) return;

            Type objType = obj.GetType();
            PropertyInfo[] objPropertiesArray = objType.GetProperties();

            foreach (PropertyInfo objProperty in objPropertiesArray)
            {
                Control control = FindControl(container, objProperty.Name);
                if (control == null) continue;

                if (control is DateTimePicker)
                {
                    DateTimePicker dateTimePicker = (DateTimePicker)control;
                    dateTimePicker.Value = (DateTime)objProperty.GetValue(obj, null);
                }
                else
                {
                    //获取控件的属性
                    Type controlType = control.GetType();
                    PropertyInfo[] controlPropertiesArray = controlType.GetProperties();

                    //通用属性
                    bool success = false;
                    success = FindAndSetControlProperty(obj, objProperty, control, controlPropertiesArray, "Checked", typeof(bool));

                    if (!success)
                        success = FindAndSetControlProperty(obj, objProperty, control, controlPropertiesArray, "Value", typeof(String));

                    if (!success)
                        success = FindAndSetControlProperty(obj, objProperty, control, controlPropertiesArray, "Text", typeof(String));

                    if (!success)
                        success = FindAndSetControlProperty(obj, objProperty, control, controlPropertiesArray, "SelectedValue", typeof(String));

                }
            }
        }

       
        /// 
        /// 根据控件名找出容器中的控件，考虑有些控件放在窗体的容器中，采用了递归查找。
        /// 
        /// 控件容器
        /// 控件名称
        /// 
        private static Control FindControl(Control container, string controlName)
        {
            Control findControl = null;
            foreach(Control control in container.Controls)
            {
                if (control.Controls.Count == 0)
                {
                    if (control.Name == controlName)
                    {
                        findControl = control;
                        break;
                    }
                }
                else
                {
                    findControl = FindControl(control, controlName);
                }
            }
            return findControl;
        }

        /// 
        /// 设置控件的值
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        private static bool FindAndSetControlProperty(object obj, PropertyInfo objProperty, Control control, PropertyInfo[] controlPropertiesArray, string propertyName, Type type)
        {
            foreach (PropertyInfo controlProperty in controlPropertiesArray)
            {
                if (controlProperty.Name == propertyName && controlProperty.PropertyType == type)
                {
                    controlProperty.SetValue(control, Convert.ChangeType(objProperty.GetValue(obj, null), type), null);
                    return true;
                }
            }
            return false;
        }

        public static void BindControlsToObject(object obj, Control container)
        {
            if (obj == null) return;

            //获取业务对象的属性   
            Type objType = obj.GetType();
            PropertyInfo[] objPropertiesArray = objType.GetProperties();

            foreach (PropertyInfo objProperty in objPropertiesArray)
            {

                Control control = FindControl(container, objProperty.Name);
                if (control == null) continue;
                if (control is DateTimePicker)
                {
                    DateTimePicker dateTimePicker = (DateTimePicker)control;
                    objProperty.SetValue(obj, Convert.ChangeType(dateTimePicker.Value, objProperty.PropertyType), null);

                }
                else
                {
                    Type controlType = control.GetType();
                    PropertyInfo[] controlPropertiesArray = controlType.GetProperties();

                    bool success = false;
                    success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "Checked", typeof(bool));

                    if (!success)
                        success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "Value", typeof(String));

                    if (!success)
                        success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "Text", typeof(String));

                    if (!success)
                        success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "SelectedValue", typeof(String));
                }
            }
        }

        private static bool FindAndGetControlProperty(object obj, PropertyInfo objProperty, Control control, PropertyInfo[] controlPropertiesArray, string propertyName, Type type)
        {
            // 在整个控件属性中进行迭代
            foreach (PropertyInfo controlProperty in controlPropertiesArray)
            {
                // 检查匹配的名称和类型
                if (controlProperty.Name == "Text" && controlProperty.PropertyType == typeof(String))
                {
                    // 将控件的属性设置为
                    // 业务对象属性值
                    try
                    {
                        objProperty.SetValue(obj, Convert.ChangeType(controlProperty.GetValue(control, null), objProperty.PropertyType), null);
                        return true;
                    }
                    catch
                    {
                        // 无法将来自窗体控件
                        // 的数据转换为
                        // objProperty.PropertyType
                        return false;
                    }
                }
            }
            return true;
        }

    }
}

//使用方法：
//业务对象：
public class Model
    {
        public Model()
        {
        }

        private string test1;
        private DateTime test2;
        private string test3;

        public string Test1
        {
            set { test1 = value; }
            get { return test1; }
        }

        public DateTime Test2
        {
            set { test2 = value; }
            get { return test2; }
        }

        public string Test3
        {
            set { test3 = value; }
            get { return test3; }
        }
    }////代码如下：
using System;
using System.Windows.Forms;
using System.Reflection;
using System.Collections;

namespace BindTest
{

    public sealed class FormBinding
    {
        /// 
        /// 将业务对象绑定到窗体或控件容器
        /// 
        /// 业务对象
        /// 窗体或控件容器
        public static void BindObjectToControls(object obj, Control container)
        {
            if (obj == null) return;

            Type objType = obj.GetType();
            PropertyInfo[] objPropertiesArray = objType.GetProperties();

            foreach (PropertyInfo objProperty in objPropertiesArray)
            {
                Control control = FindControl(container, objProperty.Name);
                if (control == null) continue;

                if (control is DateTimePicker)
                {
                    DateTimePicker dateTimePicker = (DateTimePicker)control;
                    dateTimePicker.Value = (DateTime)objProperty.GetValue(obj, null);
                }
                else
                {
                    //获取控件的属性
                    Type controlType = control.GetType();
                    PropertyInfo[] controlPropertiesArray = controlType.GetProperties();

                    //通用属性
                    bool success = false;
                    success = FindAndSetControlProperty(obj, objProperty, control, controlPropertiesArray, "Checked", typeof(bool));

                    if (!success)
                        success = FindAndSetControlProperty(obj, objProperty, control, controlPropertiesArray, "Value", typeof(String));

                    if (!success)
                        success = FindAndSetControlProperty(obj, objProperty, control, controlPropertiesArray, "Text", typeof(String));

                    if (!success)
                        success = FindAndSetControlProperty(obj, objProperty, control, controlPropertiesArray, "SelectedValue", typeof(String));

                }
            }
        }

       
        /// 
        /// 根据控件名找出容器中的控件，考虑有些控件放在窗体的容器中，采用了递归查找。
        /// 
        /// 控件容器
        /// 控件名称
        /// 
        private static Control FindControl(Control container, string controlName)
        {
            Control findControl = null;
            foreach(Control control in container.Controls)
            {
                if (control.Controls.Count == 0)
                {
                    if (control.Name == controlName)
                    {
                        findControl = control;
                        break;
                    }
                }
                else
                {
                    findControl = FindControl(control, controlName);
                }
            }
            return findControl;
        }

        /// 
        /// 设置控件的值
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        private static bool FindAndSetControlProperty(object obj, PropertyInfo objProperty, Control control, PropertyInfo[] controlPropertiesArray, string propertyName, Type type)
        {
            foreach (PropertyInfo controlProperty in controlPropertiesArray)
            {
                if (controlProperty.Name == propertyName && controlProperty.PropertyType == type)
                {
                    controlProperty.SetValue(control, Convert.ChangeType(objProperty.GetValue(obj, null), type), null);
                    return true;
                }
            }
            return false;
        }

        public static void BindControlsToObject(object obj, Control container)
        {
            if (obj == null) return;

            //获取业务对象的属性   
            Type objType = obj.GetType();
            PropertyInfo[] objPropertiesArray = objType.GetProperties();

            foreach (PropertyInfo objProperty in objPropertiesArray)
            {

                Control control = FindControl(container, objProperty.Name);
                if (control == null) continue;
                if (control is DateTimePicker)
                {
                    DateTimePicker dateTimePicker = (DateTimePicker)control;
                    objProperty.SetValue(obj, Convert.ChangeType(dateTimePicker.Value, objProperty.PropertyType), null);

                }
                else
                {
                    Type controlType = control.GetType();
                    PropertyInfo[] controlPropertiesArray = controlType.GetProperties();

                    bool success = false;
                    success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "Checked", typeof(bool));

                    if (!success)
                        success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "Value", typeof(String));

                    if (!success)
                        success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "Text", typeof(String));

                    if (!success)
                        success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "SelectedValue", typeof(String));
                }
            }
        }

        private static bool FindAndGetControlProperty(object obj, PropertyInfo objProperty, Control control, PropertyInfo[] controlPropertiesArray, string propertyName, Type type)
        {
            // 在整个控件属性中进行迭代
            foreach (PropertyInfo controlProperty in controlPropertiesArray)
            {
                // 检查匹配的名称和类型
                if (controlProperty.Name == "Text" && controlProperty.PropertyType == typeof(String))
                {
                    // 将控件的属性设置为
                    // 业务对象属性值
                    try
                    {
                        objProperty.SetValue(obj, Convert.ChangeType(controlProperty.GetValue(control, null), objProperty.PropertyType), null);
                        return true;
                    }
                    catch
                    {
                        // 无法将来自窗体控件
                        // 的数据转换为
                        // objProperty.PropertyType
                        return false;
                    }
                }
            }
            return true;
        }

    }
}

//使用方法：
//业务对象：
public class Model
    {
        public Model()
        {
        }

        private string test1;
        private DateTime test2;
        private string test3;

        public string Test1
        {
            set { test1 = value; }
            get { return test1; }
        }

        public DateTime Test2
        {
            set { test2 = value; }
            get { return test2; }
        }

        public string Test3
        {
            set { test3 = value; }
            get { return test3; }
        }
    }

在一个Winform中，放两个TextBox控件，一个DateTimePicker控件，一个Panel控件，分别命名位Test1、Test2、Test3，其中把Text3控件放在Panel1中。
将业务对象绑定到窗体：

Model model = new Model();
model.Test1 = "Hello,World!";
model.Test2 = DateTime.Now.AddMonths(-2);
model.Test3 = "Nice to meet u!";
FormBinding.BindObjectToControls(model, this);

将窗体绑定到业务对象：

Model model = new Model();
FormBinding.BindControlsToObject(model, this);
MessageBox.Show(model.Test1 + "  " + model.Test2.ToShortDateString() + "  " + model.Test3);

[WinForm] 使用反射将业务对象绑定到窗体或控件容器,搜素材,soscw.com

[WinForm] 使用反射将业务对象绑定到窗体或控件容器

标签：winform com http blog style class div img code java c

原文地址：http://www.cnblogs.com/jqmtony/p/3699184.html

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[WinForm] 使用反射将业务对象绑定到窗体或控件容器

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