Вы столкнетесь с множеством проблем: ViewState, элементы управления, которым требуются теги формы, обратные передачи не будут работать, но если вы делаете это с элементом управления, который является просто View, он будет работать нормально.
Сценарий:
//use .ready() or pageLoad() and pass params etc if you need to
$.ajax({
type: 'POST',
url: 'Default.aspx/GetControlViaAjax',
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
$('#yourdiv').html(data.d);
}
});
WebMethod:
[WebMethod]
public static string GetControlViaAjax()
{
//example public properties, send null if you don't have any
Dictionary<string, object> d = new Dictionary<string, object>();
d.Add("CssClass", "YourCSSClass");
d.Add("Title", "Your title");
return RenderUserControl("/yourcontrol.ascx", true, d, null, null);
//use this one if your controls are compiled into a .dll
//return RenderUserControl(null, true, d, "Com.YourNameSpace.UI", "AwesomeControl");
}
Метод визуализации:
private static string RenderUserControl(string path, bool useFormLess,
Dictionary<string, object> controlParams, string assemblyName, string controlName )
{
Page pageHolder = null;
if (useFormLess)
{
pageHolder = new FormlessPage() { AppRelativeTemplateSourceDirectory = HttpRuntime.AppDomainAppVirtualPath }; //needed to resolve "~/"
}
else
{
pageHolder = new Page() { AppRelativeTemplateSourceDirectory = HttpRuntime.AppDomainAppVirtualPath };
}
UserControl viewControl = null;
//use path by default
if(String.IsNullOrEmpty(path))
{
//load assembly and usercontrol when .ascx is compiled into a .dll
string controlAssemblyName = string.Format("{0}.{1},{0}", assemblyName, controlName );
Type type = Type.GetType(controlAssemblyName);
viewControl = (UserControl)pageHolder.LoadControl(type, null);
}
else
{
viewControl = (UserControl)pageHolder.LoadControl(path);
}
viewControl.EnableViewState = false;
if (controlParams != null && controlParams.Count > 0)
{
foreach (var pair in controlParams)
{
Type viewControlType = viewControl.GetType();
PropertyInfo property =
viewControlType.GetProperty(pair.Key);
if (property != null)
{
property.SetValue(viewControl, pair.Value, null);
}
else
{
throw new Exception(string.Format(
"UserControl: {0} does not have a public {1} property.",
path, pair.Key));
}
}
}
if (useFormLess)
{
pageHolder.Controls.Add(viewControl);
}
else
{
HtmlForm form = new HtmlForm();
form.Controls.Add(viewControl);
pageHolder.Controls.Add(form);
}
StringWriter output = new StringWriter();
HttpContext.Current.Server.Execute(pageHolder, output, false);
return output.ToString();
}
Класс FormlessPage:
public class FormlessPage : Page
{
public override void VerifyRenderingInServerForm(Control control)
{
}
}