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用反射将业务对象绑定到ASP.NET__教程
日期:2007-5-15 21:03:33 人气:80     [ ]
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<param name="obj">The object whose properties are being retrieved</param>
/// <param name="objProperty">The property of the object being retrieved

[page_break] 

</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)
{

[page_break] 

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;
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, "Checked", typeof(bool));

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

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

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