[英]Return partial view if action is ajax or child action universally
我已經燒毀了谷歌試圖構建某種類,這將普遍確定它是 AJAX 調用還是子操作。 這樣我的控制器就可以確定是返回局部視圖還是完整視圖。 到目前為止,我的運氣並不好。 目前我正在使用以下代碼來實現這一點:
if (Request.IsAjaxRequest() || ControllerContext.IsChildAction)
{
return PartialView();
}
return View();
問題是您必須在控制器中的每個動作和遇到的每個條件中執行此操作,但我確信有一種方法可以通過幫助程序實現這一點,但無法弄清楚如何實現。 你能指點我任何鏈接/示例代碼來實現這一點。
編輯:
@Aron 我已經發布了一段代碼,因為整個控制器太長了。 但是你可以看到我的困境。 返回包含一個視圖和一個對象/模型“k”。
public ActionResult _Details_Message(int id = 0, int CId = 0)
{
ViewBag.MrnSortParm = CId;
if (id != 0)
{
var k = mrn.MRNS.Where(u => u.Id == id).SingleOrDefault();
if (k.To == User.Identity.Name)
{
if (k.Type == 0) // message
{
k.Read = true;
mrn.Entry(k).State = EntityState.Modified;
mrn.SaveChanges();
}
return PartialView("_Details_Message", k);//replace the above code here
}
if (k.From == User.Identity.Name)
{
return PartialView("_Sent", k); //replace the above code here
}
}
var m = new message();
m.CourierId = CId;
return PartialView("_Create_Message", m); //replace the above code here
}
編輯 2我找到了一個答案,它不是輔助函數,而是視圖中的修改。 鏈接在這里。 可以將我自己的問題標記為重復:(
一個簡單的解決方案可能是在 Views 文件夾下的_ViewStart.cshtml
文件中使用類似的代碼:
@{
Layout = Request.IsAjaxRequest() || ViewContext.IsChildAction
? null
: "~/Views/Shared/_Layout.cshtml";
}
使用該代碼,您只需return View();
從你的所有行動中。
由於所有視圖都經過該步驟,因此這可能是您的通用解決方案。
好吧,你很幸運,因為我寫了大量代碼來做類似的事情。 如果您想將模型作為 JSON 對象或視圖返回,這也會考慮在內。 它還將所有 Ajax 調用包裝到一個包裝器響應元素中
基本上,如果你有一個 UI 人員在做事,你永遠不需要知道他想要什么。 讓他寫意見,或進行 AJAX 調用。 這將 UI 人員與 C# 開發人員完全解耦(只要他了解如何編寫 MVC 視圖,他根本不需要知道控制器是如何工作的,只需要知道傳遞的模型)。
ControllerBase
類:
public abstract class MyControllerBase : Controller
{
// could be moved to web.config
private const _jsonDataType = "JsonDataType";
public bool IsAjaxRequest
{
get
{
return this.HttpContext.Request.IsAjaxRequest();
}
}
public bool IsAjaxHtmlRequest
{
get
{
return string.Equals(this.Request.Headers[MyControllerBase._jsonDataType], "html", StringComparison.CurrentCultureIgnoreCase);
}
}
private JsonResponse GetAjaxResponse()
{
JsonResponse result = new JsonResponse();
result.IsValid = true;
return result;
}
private JsonResponse<T> GetAjaxResponse<T>(T model)
{
JsonResponse<T> result = new JsonResponse<T>();
result.Data = model;
result.IsValid = true;
return result;
}
private JsonResponse<string> GetAjaxHtmlResponse()
{
JsonResponse<string> result = new JsonResponse<string>();
result.Data = this.PartialViewToString(this.ControllerContext.RouteData.Values["Action"].ToString(), null);
result.IsValid = true;
return result;
}
private JsonResponse<string> GetAjaxHtmlResponse<T>(T model)
{
JsonResponse<string> result = new JsonResponse<string>();
result.Data = this.PartialViewToString(this.ControllerContext.RouteData.Values["Action"].ToString(), model);
result.IsValid = true;
return result;
}
private JsonResponse<string> GetAjaxHtmlResponse<T>(T model, string viewName)
{
JsonResponse<string> result = new JsonResponse<string>();
result.Data = this.PartialViewToString(viewName, model);
result.IsValid = true;
return result;
}
public ActionResult ViewOrAjax()
{
return this.ViewOrAjax(JsonRequestBehavior.DenyGet);
}
public ActionResult ViewOrAjax(JsonRequestBehavior jsonRequestBehavior)
{
if (this.ControllerContext.IsChildAction)
{
return this.PartialView(this.ControllerContext.RouteData.Values["Action"].ToString(), null);
}
if (this.IsAjaxRequest)
{
if (this.IsAjaxHtmlRequest)
{
return this.Json(this.GetAjaxHtmlResponse(), jsonRequestBehavior);
}
return this.Json(this.GetAjaxResponse(), jsonRequestBehavior);
}
return this.View(this.ControllerContext.RouteData.Values["Action"].ToString(), null);
}
public ActionResult ViewOrAjax<T>(T model)
{
return this.ViewOrAjax<T>(model, JsonRequestBehavior.DenyGet);
}
public ActionResult ViewOrAjax<T>(T model, JsonRequestBehavior jsonRequestBehavior)
{
if (this.ControllerContext.IsChildAction)
{
return this.PartialView(model);
}
if (this.IsAjaxRequest)
{
if (this.IsAjaxHtmlRequest)
{
return this.Json(this.GetAjaxHtmlResponse(model), jsonRequestBehavior);
}
return this.Json(this.GetAjaxResponse<T>(model), jsonRequestBehavior);
}
return this.View(model);
}
public ActionResult ViewOrAjax<T>(IView view, T model, JsonRequestBehavior jsonRequestBehavior)
{
if (this.ControllerContext.IsChildAction)
{
return this.PartialView(model);
}
if (this.IsAjaxRequest)
{
if (this.IsAjaxHtmlRequest)
{
return this.Json(this.GetAjaxHtmlResponse(model), jsonRequestBehavior);
}
return this.Json(this.GetAjaxResponse<T>(model), jsonRequestBehavior);
}
return this.View(view, model);
}
public ActionResult ViewOrAjax<T>(string viewName, T model)
{
return this.ViewOrAjax<T>(viewName, model, JsonRequestBehavior.DenyGet);
}
public ActionResult ViewOrAjax<T>(string viewName, T model, JsonRequestBehavior jsonRequestBehavior)
{
if (this.ControllerContext.IsChildAction)
{
return this.PartialView(model);
}
if (this.IsAjaxRequest)
{
if (this.IsAjaxHtmlRequest)
{
return this.Json(this.GetAjaxHtmlResponse(model, viewName), jsonRequestBehavior);
}
return this.Json(this.GetAjaxResponse<T>(model), jsonRequestBehavior);
}
return this.View(viewName, model);
}
public ActionResult ViewOrAjax<T>(string viewName, string masterName, T model)
{
return this.ViewOrAjax<T>(viewName, masterName, model, JsonRequestBehavior.DenyGet);
}
public ActionResult ViewOrAjax<T>(string viewName, string masterName, T model, JsonRequestBehavior jsonRequestBehavior)
{
if (this.ControllerContext.IsChildAction)
{
return this.PartialView(model);
}
if (this.IsAjaxRequest)
{
if (this.IsAjaxHtmlRequest)
{
return this.Json(this.GetAjaxHtmlResponse(model, viewName), jsonRequestBehavior);
}
return this.Json(this.GetAjaxResponse(model), jsonRequestBehavior);
}
return this.View(viewName, masterName, model);
}
protected internal new ViewResult View(string viewName, string masterName, object model)
{
if (model != null)
{
ViewData.Model = model;
}
ViewResult result = new ViewResult
{
ViewName = viewName,
MasterName = masterName,
ViewData = ViewData,
TempData = TempData
};
return result;
}
}
Ajax 調用的JsonResponse<>
全局包裝器:
public class JsonResponse
{
public JsonResponse()
{
}
public bool IsValid { get; set; }
public bool IsAjaxRequestUnsupported { get; set; }
public string RedirectTo { get; set; }
public string CanonicalUrl { get; set; }
}
public class JsonResponse<T> : JsonResponse
{
public JsonResponse() : base()
{
}
public T Data { get; set; }
}
Javascript global_getJsonResponse
代碼(需要 jQuery):
function global_getJsonResult(Controller, View, data, successCallback, completeCallback, methodType, returnType, jsonDataType) {
if (IsString(Controller)
&& IsString(View)
&& !IsUndefinedOrNull(data)) {
var ajaxData;
var ajaxType;
if (typeof (data) == "string") {
ajaxData = data;
ajaxType = "application/x-www-form-urlencoded"
}
else {
ajaxData = JSON.stringify(data);
ajaxType = "application/json; charset=utf-8";
}
var method = 'POST';
if (methodType) {
method = methodType;
}
var dataType = 'json';
if (returnType) {
dataType = returnType;
}
var jsonType = 'html';
if (jsonDataType) {
jsonType = jsonDataType;
}
var jqXHR = $.ajax({
url: '/' + Controller + '/' + View,
headers: { JsonDataType: jsonType },
data: ajaxData,
type: method,
dataType: dataType,
contentType: ajaxType,
success: function (jsonResult) {
if (!IsUndefinedOrNull(jsonResult)
&& jsonResult.hasOwnProperty("RedirectTo")
&& !IsUndefinedOrNull(jsonResult.RedirectTo)
&& jsonResult.RedirectTo.length > 0) {
$.fn.notify('error', 'Login Expired', 'You have been inactive for a prolonged period of time, and have been logged out of the system.');
window.setTimeout(function () { window.location = jsonResult.RedirectTo }, 5000);
}
else if (IsFunction(successCallback)) {
successCallback(jsonResult, Controller + '/' + View);
}
},
error: function (jqXHR, textStatus, errorThrown) {
if (errorThrown != 'abort') {
$.fn.notify('error', 'Whoops! Something went wrong.', 'We have been notified of the error.'/* textStatus + ': ' + errorThrown*/);
}
log('ERROR IN global_getJsonResult() : ', textStatus, errorThrown, jqXHR);
},
complete: function (jqXHR, textStatus) {
if (IsFunction(completeCallback)) {
completeCallback(jqXHR, textStatus, Controller + '/' + View);
}
}
});
return jqXHR;
}
}
此代碼通過處理 ajax 調用中的會話超時支持服務器端和客戶端超時,更改如下:
protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext)
{
if (filterContext.HttpContext.Request.IsAjaxRequest())
{
filterContext.Result = new JsonResult
{
Data = new JsonResponse<bool>
{
IsValid = false,
RedirectTo = FormsAuthentication.LoginUrl
},
JsonRequestBehavior = JsonRequestBehavior.AllowGet
};
}
else
{
base.HandleUnauthorizedRequest(filterContext);
}
}
控制器上的一些擴展方法允許您將呈現的部分視圖作為 json 中的文本返回(此代碼來自 SO,我通常記錄此類但我丟失了它):
internal static class ControllerExtensions
{
public static string PartialViewToString(this Controller instance, object model)
{
string viewName = instance.ControllerContext.RouteData.GetRequiredString("action");
return ControllerExtensions.PartialViewToString(instance, viewName, model);
}
public static string PartialViewToString(this Controller instance, string viewName, object model)
{
string result;
ViewDataDictionary viewData = instance.ViewData;
viewData.Model = model;
using (var sw = new StringWriter())
{
var viewResult = ViewEngines.Engines.FindPartialView(instance.ControllerContext, viewName);
var viewContext = new ViewContext(instance.ControllerContext, viewResult.View, viewData, instance.TempData, sw);
viewResult.View.Render(viewContext, sw);
viewResult.ViewEngine.ReleaseView(instance.ControllerContext, viewResult.View);
result = sw.GetStringBuilder().ToString();
}
return result;
}
}
現在(遺憾地)從這個基本控制器派生出所有的控制器:
public HomeController : MyBaseController
{
public ActionResult Index()
{
var viewModel = new MyViewModel();
return this.ViewOrAjax(viewModel);
}
}
現在,如果瀏覽器調用頁面作為您的標准獲取,您將使用 Layout(又名this.View(viewModel)
)正常呈現頁面。
如果您通過 Javascript 使用 Ajax 調用它:
global_getJsonResult("Home", // Controller or 'Area/Home' for areas
"Index", // View
$('#form').serialize(), // Json object or a serialized Form
jsCallBack, // call back function or null
"Post", // Get or Post
"Html"); // "Html" to return a Partial View in "Data"
// or "Json" to return a serialized view model in "Data"
德米特里回答的改進:
創建自定義 WebViewPage 類,這樣就不需要將修改添加到多個 View 中(與存在多個由 View 本身而不是 _ViewStart 文件確定的 Layout 文件有關)
public abstract class CustomWebViewPage: WebViewPage
{
public override string Layout
{
get
{
return Request.IsAjaxRequest() || ViewContext.IsChildAction ? null : base.Layout;
}
set
{
base.Layout = value;
}
}
}
public abstract class CustomWebViewPage<TModel>: CustomWebViewPage
{
}
並在 web.config (在 Views 文件夾下)
<pages pageBaseType="Fully.Qualified.Namespace.CustomWebViewPage">
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.