实体类和显示控件的绑定

public class FormBinding {

/// <summary>

/// Binds an object's properties to <see cref="Control"/>s with the same ID as the propery name.

/// </summary>

/// <param name="obj">The object whose properties are being bound to forms Controls</param>

/// <param name="container">The control in which the form Controls reside (usually a Page or ContainerControl)</param>

public static void BindObjectToControls(object obj, Control container) {

if (obj == null) return;

// Get the properties of the business object

Type objType = obj.GetType();

PropertyInfo[] objPropertiesArray = objType.GetProperties();

foreach (PropertyInfo objProperty in objPropertiesArray) {

Control control = container.FindControl(objProperty.Name);

if (control==null)continue;

// handle ListControls (DropDownList, CheckBoxList, RadioButtonList)

if (control is ListControl) {

ListControl listControl = (ListControl) control;

listControl.SelectedIndex=-1;

string propertyValue = objProperty.GetValue(obj, null).ToString();

ListItem listItem = listControl.Items.FindByValue(propertyValue);

if (listItem != null) listItem.Selected = true;

} else {

// get the properties of the control

Type controlType = control.GetType();

PropertyInfo[] controlPropertiesArray = controlType.GetProperties();

// test for common properties

bool success = false;

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

if (!success)

success = FindAndSetControlProperty(obj, objProperty, control, controlPropertiesArray, "SelectedDate", typeof(DateTime) );

if (!success)

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

if (!success)

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

}

/// <summary>

/// Looks for a property name and type on a control and attempts to set it to the value in an object's property

/// of the same name.

/// </summary>

/// <param name="obj">The object whose properties are being retrieved</param>

/// <param name="objProperty">The property of the object being retrieved</param>

/// <param name="control">The control whose ID matches the object's property name.</param>

/// <param name="controlPropertiesArray">An array of the control's properties</param>

/// <param name="propertyName">The name of the Control property being set</param>

/// <param name="type">The correct type for the Control property</param>

/// <returns>Boolean for whether the property was found and set</returns>

private static bool FindAndSetControlProperty(object obj, PropertyInfo objProperty, Control control, PropertyInfo[] controlPropertiesArray, string propertyName, Type type) {

// iterate through control properties

foreach (PropertyInfo controlProperty in controlPropertiesArray) {

// check for matching name and type

if (controlProperty.Name == propertyName && controlProperty.PropertyType == type) {

// set the control's property to the business object property value

controlProperty.SetValue(control, Convert.ChangeType( objProperty.GetValue(obj, null), type) , null);

return true;

}

return false;

}

/// <summary>

/// Binds your the values in <see cref="Control"/>s to a business object.

/// </summary>

/// <param name="obj">The object whose properties are being bound to Control values</param>

/// <param name="container">The control in which the form Controls reside (usually a Page or ContainerControl)</param>

public static void BindControlsToObject(object obj, Control container) {

if (obj == null) return;

// Get the properties of the business object

Type objType = obj.GetType();

PropertyInfo[] objPropertiesArray = objType.GetProperties();

foreach (PropertyInfo objProperty in objPropertiesArray) {

Control control = container.FindControl(objProperty.Name.ToLower());

if (control==null)continue;

if (control is ListControl) {

ListControl listControl = (ListControl) control;

if (listControl.SelectedItem != null)

objProperty.SetValue(obj, Convert.ChangeType(listControl.SelectedItem.Value,objProperty.PropertyType), null);

} else {

// get the properties of the control

Type controlType = control.GetType();

PropertyInfo[] controlPropertiesArray = controlType.GetProperties();

// test for common properties

bool success = false;

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

if (!success)

success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "SelectedDate", typeof(DateTime) );

if (!success)

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

if (!success)

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

}

/// <summary>

/// Looks for a property name and type on a control and attempts to set it to the value in an object's property

/// of the same name.

/// </summary>

/// <param name="obj">The object whose properties are being set</param>

/// <param name="objProperty">The property of the object being set</param>

/// <param name="control">The control whose ID matches the object's property name.</param>

/// <param name="controlPropertiesArray">An array of the control's properties</param>

/// <param name="propertyName">The name of the Control property being retrieved</param>

/// <param name="type">The correct type for the Control property</param>

/// <returns>Boolean for whether the property was found and retrieved</returns>

private static bool FindAndGetControlProperty(object obj, PropertyInfo objProperty, Control control, PropertyInfo[] controlPropertiesArray, string propertyName, Type type) {

// iterate through control properties

foreach (PropertyInfo controlProperty in controlPropertiesArray) {

// check for matching name and type

if (controlProperty.Name == propertyName && controlProperty.PropertyType == type) {

// set the control's property to the business object property value

try {

objProperty.SetValue(obj, Convert.ChangeType( controlProperty.GetValue(control, null), type) , null);

return true;

} catch {

// the data from the form control could not be converted to objProperty.PropertyType

return false;

}