Question

i’d like to better understand the issue of casting object to a name vs value collection

say …just if i could do it like that

1) does the java-script needs some fine tuning ? packing the data..

2) and most important for me : What is the correct way to do the conversion from that key value Js to a Dictionary<T,T> C# ?

the Aspx / Html part

<input type="text" id="tbx_Name" value="Avi" />
<input type="text" id="tbx_City" value="TelAviv" />
<input type="text" id="tbx_Country" value="Israel" />

<select id="ChosenRandomClass" style="display:none">
<option selected="selected" value="0">(choose a random)</option>
<option value="1">random Top Beach</option>
<option value="2">random Top Center</option>
<option value="3">random Local Pub</option>
</select>

the JavaScript / jQuery part

  function AddNew() {

        if (!confirm("would you like to add this contact ?")) return;

        var Name = $('#tbx_Name').val();
        var City = $('#tbx_City').val();
        var Country = $('#tbx_Country').val();

        var selectedRC = $('#ChosenRandomClass option:selected').val();

        var hDate = []

        var param1 = { key: "Name", value: Name };
        var param2 = { key: "City", value: City };
        var param3 = { key: "Country", value: Country };
        var param4 = { key: "SelctedClass", value: selectedRC };

        hDate.push(param1);
        hDate.push(param2);
        hDate.push(param3);
        hDate.push(param4);
                                         // is this part necessary the data will not get to
                                         // code behind properly without the serializing ?
        var startPrt = Sys.Serialization.JavaScriptSerializer.serialize(hDate);
              ajaxUpdate("addNew", startPrt);

    }

the Code behind C# part

public void AddNewRecord(object startPrt)
{
    Dictionary<string, string> SenthDate = new Dictionary<string, string>();
   //        .....etc

}

i will appreciate the correct answer

thanks for your kind help and time.

Answer 1

I gave your sample a try and noticed that the startPrt parameter is actually being received as an Array of Dictionary(string, object). Hence, if you make the AJAX call like this:

var hDate = [];
hDate.push({ key: "Name", value: Name });
hDate.push({ key: "City", value: City });
hDate.push({ key: "Country", value: Country });
hDate.push({ key: "SelctedClass", value: selectedRC });

$.ajax({
    contentType: 'application/json; charset=utf-8',
    url: 'MyPage.aspx/AddNewRecord',
    type: 'POST',
    data: JSON.stringify({ startPrt: hDate }),
    success: success, // success callback
    error: error // error callback
});

You can define your WebMethod like the follwoing to convert the startPrt parameter to a dictionary:

[WebMethod]
public static void AddNewRecord(object startPrt)
{
    var dict = new Dictionary<string, object>();
    foreach (Dictionary<string, object> pair in (Array)startPrt)
        dict.Add((string)pair["key"], pair["value"]);
}