Ok, I have a controller that returns a response to an ajax call and I'd like to intercept that response in my view. How can I do this?
Alternatively, how could i reference my ajax variable in my view?
View: ContractorList.ascx
Controller: HaulerController.cs
Not sure exactly what you're asking, but I think the answer is something along the lines of this:
$.get("/url/to/action", {/* data you're passing to action */}, function (response) {
// your result is available here....
// you want to pass it into the callback method as an argument, as above
// everything your action returns to the page is stored in the response object.
// can you do something like:
var idx = response.indexOf('specific string I expect');
if (idx > -1)
// the string you expected is there so show popup....
}, "html");
return false;
});
If this isn't what you're after, please clarify
Related
I have a button on a site that should - if clicked - pass some data to the controller and redirect to another view. I tried it with AJAX and realized it doesn't work, because it cannot redirect to another view.
I read some posts that suggested using JavaScript, but there wasn't one where a model is passed to the View as well (Propably I'm just dumb...).
Right now it looks like this:
function buttonClick() {
$.ajax({
type: 'POST',
url: '/Backup/Timestamp',
data: {iniName: selectedFile}
});
}
public ActionResult Timestamp(string iniName)
{
//some code
return View(Model);
}
Thanks for your help!
Instead of ajax, use the #Url.Action
// creates a url like this <domain>/Backup/Timestamp
// This should be in the cshtml
<script>
var baseurl = '#Url.Action("Timestamp", "Backup")';
</script>
// in your custom js file which should added below the baseurl initialization
function buttonClick() {
location.href = baseurl +'?iniName=' + selectedFile
}
The #Url.Action() method is proccessed on the server-side. It will get the path for your action method. Then concatinate the parameter to that url and simply redirect to it
On button click you can just redirect the page to some get method. So your parameter 'iniName' will be passed as query string instead of request body.
Because if you use GET method all the parameter will be passed as query string. If it is POST method then it will be send as request body.
So I think in your case Get is enough. So what you need to do is, you need to replace the "buttonClick" function like below.
function buttonClick() {
location.href = '#Url.Action("Timestamp", "Backup")'+'?iniName=' + selectedFile
}
You can use Ajax Action link as:
#Html.ActionLink("Edit", // <-- Link text
"Edit", // <-- Action Method Name
new { id=item.CustomerID }, // <-- Route arguments
new {#class="ui-btn", data_val="abc"} // <-- htmlArguments
)
A complete detail for using Ajax Action link can be found at link
I'm wondering if this is the right way of passing a JavaScript callback function to a partial view. So depending on the view I'm on the partial view may do different things. So I pass in a JavaScript call back function to achieve that.
Here is a generic function to call my partial view and where I pass in the JavaScript call back function.
function showAjaxMessage(targetDiv, ajaxMessage) {
var ajaxLoader = "<img src='Content/loader.gif' alt=''>";
$(targetDiv).html("<p>" + ajaxLoader + " " + ajaxMessage+"</p>");
}
function getPartialView(actionUrl, targetDiv, ajaxMessage, cbFunc) {
showAjaxMessage(targetDiv, ajaxMessage);
$.get(actionUrl, { callback: eval(cbFunc).toString()}, function(result) {
$(targetDiv).html(result);
});
}
Here is an example of me calling it:
getPartialView("Home/OpenLogin", "#divLogon", "Loading...", function() { alert('This is the call back function!'); test(); });
Here is the controller where I get the callback function and save it to a model. Then I pass it back to the partial view.
// returns a login dialog which will be injected
// into a placeholder div on the client
public ActionResult OpenLogin(string callback)
{
var baseModel = new BaseModel();
baseModel.cbFunc = callback;
return PartialView("LoginDialog", baseModel);
}
Here is an example of my partial view. Where you can see I get the call back function and set in the init function.
#model MvcApplication8.Models.BaseModel
function init(cb){
if(cb!=undefined){
cb();
}
else{
alert("undefined");
}
}
function test(){
alert("Testing my call back");
}
$(function () {
init(#Html.Raw(#Model.cbFunc));
});
The solution above works, but the main question that comes to mind is this the right way of doing it? Passing the call back function from the controller to the partial view sounds wrong, but how else would you do it? Any ideas?
Based on your example, I do not understand why would pass the callback function to a partial view. The partial view is rendered inside a div on the same page. Why not just declare the function on the page so that it's available to the rendered partial view?
I'm having troubles reading a Json result back from a controller method...
I have this method in my controller:
[AcceptVerbs(HttpVerbs.Post)]
public JsonResult GetCurrent()
{
IList<string> profile = new List<string>();
profile.Add("-1");
profile.Add("Test");
profile.Add("");
return this.Json(profile);
}
And it is being called by this jquery ajax post:
$.post("/Profile/GetCurrent", function(profile) { profileCompleteOpen(profile); }, "json");
and the javascript function called on the post's callback:
function profileCompleteOpen(profile) {
alert(profile);
alert(profile[0]);
}
The result of the first alert shows the array like this:
["-1","Test",""]
But the result of the second alert shows this:
[
rather than
-1
What am I doing wrong here... I've compared it to one of the other times I'm doing this and it seems to be the exact same. Why isn't it recognizing it's an array?
Thanks,
Matt
Try converting the json data in profile to a proper object by using eval() on it.
Example:
var profileObject = eval('(' + profile + ')');
Hmmm, I'd be doing what you're trying to do a little differently.
I'd either return a fully qualified object and then use it's properties;
class MyObj
{
public string name{get;set;}
}
fill the object and return it as a json object. then you're jquery code can access like any other object.
The other way might be to do a return PartialView("MyView", model);
That will return the partial view as html back to your page which you can then append to your html.
I think the type of profile is string instead of array. Why? Check the $.post method parameters. Maybe the problem is there.
$.post("url", null, function(profile) { ... }, "json");
I have a Create ActionMethod, something along the lines of:
[AcceptVerbs(HttpVerbs.Post)]
public ActionMethod Create(Journey journey)
{
if (Request.IsAjaxRequest())
{
//Save values
return Json(new { JourneyID = journey.JourneyID } );
}
}
The Journey object that I pass in is from my LINQ2SQL datamodel. I call the above ActionMethod from my Javascript using the JQuery.Post function, like:
var journeyData = {
CustomerID: $('#CustomerID').val(),
JourneyID: $('#JourneyID').val(),
EstimatedTravelTime: $('#EstimatedTravelTime').val(),
RouteName: $('#RouteName').val(),
.....
};
$.post('/Journey/Create',
journeyData,
function(jsonResult) {
//deal with result
},
'json'
);
The issue that I am having is that in the ActionMethod Journey.RouteName is always returning as null but the JSON that I pass back has a value, I check this using
alert(JSON.stringify(journeyData));
and in the resultant JSON object RouteName has a value, e.g. 'Go to work'. Any ideas why this wouldn't be being set in the ActionMethod? All other values that I pass back are being set fine.
Just a try and error suggestion:
First thing i would try is to rename "RouteName" param with somethign different, as "RouteName" is also a property of some MVC-redirect methods..
Have you examined your request JSON object that's going to the server?
Have you tried adding quotes to your string property value?
Like this:
var journeyData = {
CustomerID: $('#CustomerID').val(),
JourneyID: $('#JourneyID').val(),
EstimatedTravelTime: $('#EstimatedTravelTime').val(),
RouteName: '"' + $('#RouteName').val() + '"',
.....
};
There are a couple of things to consider. I'm guessing this is already in place, but your model must have a getter and setter on the RouteName property in order to be properly bound. Another thought is you might not be establishing the strong binding. This is usually done as part of the view's page declaration (e.g. Inherits="System.Web.Mvc.ViewPage") but I'm not sure this is happening prior to your post.
When I use:
new AjaxOptions
{
UpdateTargetId = "VoteCount" + indx,
OnSuccess = "AnimateVoteMessage"
}
everything works fine...but I am trying to animate items in a list, with automatically assigned ID's. Since I want each of these to be addressable from my javascript, I believe I need to pass a parameter to my javascript. But when I use:
new AjaxOptions
{
UpdateTargetId = "VoteCount" + indx,
OnSuccess = "AnimateVoteMessage(2)"
}
I get an " Sys.ArgumentUndefinedException: Value cannot be undefined." exception. Well I get that when using the debug versions of MicrosoftMvcAjax.js. When using the compressed version I get a "Microsoft JScript runtime error: 'b' is null or not an object"
So my question is, can I pass a parameter to my javascript function using the OnSuccess event for a ActionLink?
Is this the right approach? How else am I going to have one javascript function have the ability to be run on 10 items (in my case the IDs of multiple DIVs) on my page?
There is a better way to do this - use the built in parameters that the OnSuccess call can be expected to pass
the built in parameters (the ones I found so far anyway) are data, status and xhr
data = whatever you return from the action method
status = if successful this status is just a string that says "success"
xhr = object that points to a bunch of javascript stuff that I will not be discussing...
so you would define your javascript like this (you can leave out the arguments you don't need - since all we want is our data back from the action we will just take the data argument)
function myOnSuccessFunction (data)
{
..do stuff here with the passed in data...
}
like I said before, data is whatever JSON that may be returned by the ActionResult so if your controller action method looks like this...
public ActionResult MyServerAction(Guid modelId)
{
MyModel mod = new MyModel(modelId);
mod.DoStuff();
return Json(mod, JsonRequestBehavior.AllowGet);
}
you would set up your action link like this...
#Ajax.ActionLink("Do Stuff", "MyServerAction", new { modelId = Model.Id }, new AjaxOptions { OnSuccess = "mySuccessScript(data);", OnFailure = "myFailureScript();", Confirm = "Are you sure you want to do stuff on the server?" })
this will create a confirmation message box asking if you want to actually invoke the action - clicking yes on the prompt will invoke the call to the controller - when the call comes back - the data argument will contain a JSON object of whatever you returned in your action method. Easy Peasy!
But wait! What if I want to pass another custom argument?! Simple! Just add your arguments to the front of the list...
instead of this...
function myOnSuccessFunction (data)
{
..do stuff here with the passed in data...
}
do this (you can have more than one custom argument if you like, just keep adding them as needed)...
function myOnSuccessFunction (myCustomArg, data)
{
..do stuff here with the passed in data and custom args...
}
then in your setup - just get the argument through some client side script within your ActionLink definition... i.e.
#Ajax.ActionLink("DoStuff", "MyServerAction", new { modelId = Model.Id }, new AjaxOptions { OnSuccess = "mySuccessScript(myClientSideArg, data);", OnFailure = "myFailureScript();", Confirm = "Are you sure you want to do stuff on the server?" })
Note that "myClientSideArg" in the OnSuccess parameter can come from wherever you need it to - just replace this text with what you need.
Hope That Helps!
or...a bit different syntax that worked for me:
OnSuccess = "( function() { MyFunction(arg1,arg2); } )"
There is a better way, which I believe is how Microsoft intended it: Set the AjaxOptions.OnSuccess to a function pointer, i.e. just the name of the function, no parameters. MVC will send it parameters automagically. Below is an example.
JScript parameter:
public class ObjectForJScript
{
List<int> Ids { get; set; }
}
Jscript function:
function onFormSuccess(foobar){
alert(foobar);
alert(foobar.Ids);
alert(foobar.Ids[0]);
}
View code:
#using (Ajax.BeginForm("ControllerAction", "ControllerName",
new AjaxOptions
{
OnSuccess = "onFormSuccess" //see, just the name of our function
}))
{
#Html.Hidden("test", 2)
}
Controller code:
public JsonResult ControllerAction(int test)
{
var returnObject = new ObjectForJScript
{
Ids = new List<int>{test}
};
return Json(returnObject);
}
Note that the parameter name in the JScript function doesn't matter, you don't have to call it "returnObject" even though the controller names it so.
Also note that Json() conveniently turns our List into a JScript array. As long as the methods of the C# object are translatable to Json, you can call them in the JScript like I've done.
Finally, the controller doesn't have to return a JsonResult, it can be ActionResult (but it's usually better to have a controller action do just one thing).
The above example will alert two objects (the Json and the array object which it contains), and then 2.
You can simply do this
Razor:
... OnSuccess = "AnimateVoteMessage('" + YourParameter + "')"
Please note the single quotes!
JavaScript:
function AnimateVoteMessage(YourParameter){
alert(YourParameter);
}
Enjoy,
Try this - it works for me:
OnSuccess = "new Function('MyFunction(" + myParameter + ")')"
Use this:
OnSuccess = "function(){yourfunction(" + productcode + ");}"
or
OnSuccess = "function(){yourfunction(this, " + productcode + ");}"
I ran in this issue too... and did not find a way to solve it!
I did a workaround (which is not nice but solved it for now... maybe until someone posts a solution here)...
what I did was place a hidden field in the TargetId div and OnSuccess I called a js method which retrieves the value from the hidden field <- this could happen in your AnimateVoteMessage method ...
See http://www.codeproject.com/KB/ajax/Parameters-OnSuccess.aspx
Basically:
function yourCallBack(arg1,arg2) {
return function(result) { // Your old function
alert(arg1); // param will be accessible here
alert(arg2); // param will be accessible here
alert(result);// result = the response returned from Ajax
}
}
Simply, at AjaxOptions, use the following:
OnSuccess = "onSuccessFunction(data, 'Arg1');"
Then at your function, you will get the new value as:
function onSuccessFunction(result, myNewArg) {
//Prints Arg1
Console.Write(myNewArg)
}