Sending String Data to MVC Controller using jQuery $.ajax() and $.post()

Question

There's got to be something I'm missing. I've tried using $.ajax() and $.post() to send a string to my ASP.NET MVC Controller, and while the Controller is being reached, the string is null when it gets there. So here is the post method I tried: ``` $.post("/Journal/SaveEntry", JSONstring); ``` And here is the ajax method I tried: ``` $.ajax({ url: "/Journal/SaveEntry", type: "POST", data: JSONstring }); ``` Here is my Controller: ``` public void SaveEntry(string data) { string somethingElse = data; } ``` For background, I serialized a JSON object using JSON.stringify(), and this has been successful. I'm trying to send it to my Controller to Deserialize() it. But as I said, the string is arriving as null each time. Any ideas? Thanks very much. UPDATE: It was answered that my problem was that I was not using a key/value pair as a parameter to $.post(). So I tried this, but the string still arrived at the Controller as null: ``` $.post("/Journal/SaveEntry", { "jsonData": JSONstring }); `…

Accepted Answer

Answered. I did not have the variable names set correctly after my first Update. I changed the variable name in the Controller to jsonData, so my new Controller header looks like:

```
public void SaveEntry(string jsonData)
```

and my post action in JS looks like:

```
$.post("/Journal/SaveEntry", { jsonData: JSONstring });
```

JSONstring is a "stringified" (or "serialized") JSON object that I serialized by using the JSON plugin offered at json.org. So:

```
JSONstring = JSON.stringify(journalEntry);  // journalEntry is my JSON object
```

So the variable names in the $.post, and in the Controller method need to be the same name, or nothing will work. Good to know. Thanks for the answers.

Sending String Data to MVC Controller using jQuery $.ajax() and $.post()

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