动态传递参数到DevExpress.XtraReports的小结

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
      {
          /// <summary>
          /// 将业务对象绑定到窗体或控件容器
          /// </summary>
          /// <param name="obj">业务对象</param>
          /// <param name="container">窗体或控件容器</param>
          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));

                  }
              }
          }

        
          /// <summary>
          /// 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。
          /// </summary>
          /// <param name="container">控件容器</param>
          /// <param name="controlName">控件名称</param>
          /// <returns></returns>
          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;
          }

          /// <summary>
          /// 设置控件的值
          /// </summary>
          /// <param name="obj"></param>
          /// <param name="objProperty"></param>
          /// <param name="control"></param>
          /// <param name="controlPropertiesArray"></param>
          /// <param name="propertyName"></param>
          /// <param name="type"></param>
          /// <returns></returns>
          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);