How do I pass multiple parameters to MVC controller from jQuery $.ajax()?

Question

This is what I doing to build the data:

for (var i = args.length; i < args.length; i += 2) {
    if (args.length != 0) args += ','; 
    args += '"' + arguments[i] + '":"' + arguments[i + 1] + '"';
}

This is how I am calling:

$.ajax({
        type: "GET",
        url: "/blog/GetPosts",
        //data: "{" + args + "}",                    <- gives 500 in 1.6 but works in 1.3
        data: "app=blog&id=100&page=2&pagesize=10",  <- this works
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (res) {},
        error: function (xhr, status, error) {}
});

How to build the data with multiple parameters and pass to controller? I need to loop and build the data since I have variable length of parameters.

Note that this works: data: "app=blog&id=100&page=2&pagesize=10"

But I can have &abc=something in the data itself which will be treated as another parameter.

Thanks for reading

Guffa · Accepted Answer · 2011-05-15 21:30:28Z

2

Don't create the string representation of an object, create an object instead. Also, your loop is wrong, so it would not get the values from the array properly.

var data = {};
for (var i = 0; i < arguments.length; i += 2) {
  data[arguments[i]] = arguments[i + 1];
}

Now use the variable in the call:

$.ajax({
  type: "GET",
  url: "/blog/GetPosts",
  data: data,
  ...

answered May 15, 2011 at 21:30

Guffa

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2 Comments

kheya Over a year ago

Good job with this one. I mistyped first loop for (var i =N; i < args.length; i += 2) {} as need to exclude first N parameters. But the main problem was the string representation of params. So this is fixed now.

Guffa Over a year ago

@Projapati: To skip the first N parameters, you would start the loop at N * 2.

Mike Ruhlin · Accepted Answer · 2011-05-15 21:28:12Z

2

You don't need to pass a query string into data. If you're passing multiple values, you should pass in an object.

$.ajax({
        type: "GET",
        url: "/blog/GetPosts",
        data: {
            app: 'blog',
            id: 100,
            page: 2
            pagesize: 10
        },
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (res) {},
        error: function (xhr, status, error) {}
});

jQuery will handle the URL encoding for you.

answered May 15, 2011 at 21:28

Mike Ruhlin

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1 Comment

kheya Over a year ago

This won't handle variable length parameters, will it?

Raynos · Accepted Answer · 2011-05-15 21:25:50Z

1

data: JSON.stringify(someObject)

Store your key/value data in an object then pass the stringified version to data

answered May 15, 2011 at 21:25

Raynos

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1 Comment

kheya Over a year ago

This doesn't work. I see 500 as well. I did data:JSON.stringyfy(args)

no.good.at.coding · Accepted Answer · 2011-05-15 21:23:19Z

0

It sounds like you need to make use of encodeURIComponent to encode the parameter values that have special characters such as &, + or =. You might also want to check out the comparison between escape(), encodeURI() and encodeURIComponent().

Alternatively, you might make use of $.serialize()

answered May 15, 2011 at 21:23

no.good.at.coding

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Comments

Shaunak · Accepted Answer · 2011-05-15 21:26:14Z

0

The data: "app=blog&id=100&page=2&pagesize=10" works and this //data: "{" + args + "}" doesnt Because you are using "GET" as request type. to send the data along you need the request to be of type "POST" a GET request can only send the params along with the url.

answered May 15, 2011 at 21:26

Shaunak

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1 Comment

kheya Over a year ago

This doesn't work in jQuery 1.6. I get 404. Why do you think I won't be able to do a GET with parameters?

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