get value of c# array session in javascript - javascript

I would like to know how I can get the javascript values ​​of a C # Session variable that contains an array of strings. The code is as follows: C #:
if (Session["PolizasClientes_RowID"] != null)
{
Session.Remove("PolizasClientes_RowID");
}
var array = lstPolizas.Where(x => x.POLIZA == row_id).Select(x => x.DNI).ToArray();
var array2 = lstPolizas.Where(x => x.POLIZA == row_id).Select(x => x.POLIZA).ToArray();
string dni= array[0];
string poliza = array2[0];
string[] arrays = new string[] { dni, poliza };
Session["PolizasClientes_RowID"] = arrays;
javascript::
var valores_sesion = '<%=Session["PolizasClientes_RowID"]%>';
//return System.string[] :
console.log(valores_sesion);
//return S
console.log(valores_sesion[0]);
//reurn S
console.log(valores_sesion[0][0]);


You need to use some JSON framework like Newtonsoft Json.NET, for instance. Install it using NuGet and then serialize your array into JSON like this:
var valores_sesion = <%=JsonConvert.SerializeObject(Session["PolizasClientes_RowID"])%>;


var valores_sesion = <%= new System.Web.Script.Serialization.JavaScriptSerializer().Serialize(Session("PolizasClientes_RowID")) %>;
try this

Related

How to pass array from Javascript to controller's action?

I have JS function like this inside the #section Scripts of .cshtml view:
function SendIndexes() {
var selectedSortOption = $("#SortBy").find('option:selected');
var sortIndex = selectedSortOption.val();
var selectedFilterByTypeOption = $("#filter_marker_bytype").find('option:selected');
var filterByTypeIndex = selectedFilterByTypeOption.val();
var selectedFilterByScoreOption = $("#filter_marker_byscore").find('option:selected');
var filterByScoreIndex = selectedFilterByScoreOption.val();
var selectedFilterByStatusOption = $("#filter_marker_bystatus").find('option:selected');
var filterByStatusIndex = selectedFilterByStatusOption.val();
var markerFilterIndexes = [filterByTypeIndex, filterByScoreIndex, filterByStatusIndex];
location.href = `/Markers/MarkersList?page=#Model.PagingInfo.CurrentPage&sortIndex=${sortIndex}&markerFilterIndexes=${markerFilterIndexes}`
}
and the controller action signature like this:
public async Task<IActionResult> MarkersList(List<string> markersForUpdateIds, IEnumerable<int> markerFilterIndexes, int page = 1, string message = "", int sortIndex = 0)
{
...
}
The problem is that the array of three elements is not passed at all. However, if I only push a single variable (element) to this array, then it is passed to the controller's action as it should.
Why is this happening and how to have all three elements passed to the controller?

I'll suggest you to use [FromQuery] attribute in your parameter and format your URL like this: myparam=myvalue1&myparam=value2&myparam=myvalue3.
public async Task<IActionResult> MarkersList([FromQuery]List<string> markersForUpdateIds, [FromQuery]IEnumerable<int> markerFilterIndexes, [FromQuery]int page = 1,[FromQuery] [FromQuery]string message = "", [FromQuery]int sortIndex = 0)
{
...
}
Take a look of ModelBinding:
https://learn.microsoft.com/en-us/aspnet/core/mvc/models/model-binding?view=aspnetcore-3.1#sources

For passing an array to the controller action. Data formats that use subscript numbers (... [0] ... [1] ...) must ensure that they are numbered sequentially starting at zero. Here you don't need to define an array, just format your url like this:
location.href = `/Markers/MarkersList?page=#Model.PagingInfo.CurrentPage&sortIndex=${sortIndex}&markerFilterIndexes[0]=${filterByTypeIndex}&markerFilterIndexes[1]=${filterByScoreIndex}&markerFilterIndexes[2]=${filterByStatusIndex}`
Since the data in the array is just int type data, you can omit the subscript numbers.

DCMTK dcm2json produces invalid JSON for broken DS or IS values

DCMTK dcm2json produces invalid JSON for broken DS or IS values see https://support.dcmtk.org/redmine/issues/769
The JSON will contain values like this example:
"00291003": {"vr":"IS","Value":[F]},
Where 'F' is clearly not a number.

This can be worked around in a Nodejs environment by first running the raw unparsed JSON through the following.
const jsonRepair = (rawJson) => {
let regex1 = /\[([^"]+)\]/g
let isNumRegex = /^[-.0-9]*\d$/g
let matches = undefined
while ((matches = regex1.exec(rawJson)) !== null) {
if (!isNumRegex.test(matches[1])) {
rawJson = rawJson.replace(matches[0], `["${matches[1]}"]`)
console.log(matches[0], `[${matches[1]}]`)
}
}
return rawJson
}

How to get JSON object in array?

var data = '[{"type":"product","id":1,"label":"Size","placeholder":"Select Size","description":"","defaultValue"
:{"text":"Size30","price":"20"},"choices":[{"text":"Size30","price":"20","isSelected":"true"},{"text"
:"Size32","price":"22","isSelected":false},{"text":"Size34","price":"28","isSelected":false}],"conditionalLogic"
:""},{"type":"product","id":2,"label":"Color","placeholder":"Select Color","description":"","defaultValue"
:{"text":"Black","price":"10"},"choices":[{"text":"Black","price":"10","isSelected":"true"},{"text"
:"Green","price":"22","isSelected":false},{"text":"Red","price":"28","isSelected":false}],"conditionalLogic"
:""},{"type":"product","id":3,"label":"Rise","placeholder":"Select Rise","description":"","defaultValue"
:{"text":"Low","price":"8"},"choices":[{"text":"High","price":"12","isSelected":"true"},{"text"
:"Low","price":"8","isSelected":false}],"conditionalLogic"
:""}]';
Here I have posted my JSON data. I want to get all the defaultValue in JSON/Array format. My output should be like-
defaultValues:['Size30','Black','Low']
How to manage that in the foreach loop?
my code :
var otherSelectedOption;
angular.forEach(data, function(optionValue, optionKey) {
if (optionValue.defaultValue.text) {
otherSelectedOption = (optionValue.defaultValue.text);
}
selectedOption = {defaultValues: otherSelectedOption};
console.log(selectedOption);
});

Your JSON is not valid, since objects are not separated by comma ,
Suppose this is the JSON
var obj = '[{"type":"product","id":1,"label":"Size","placeholder":"Select Size","description":"","defaultValue"
:{"text":"Size30","price":"20"},"choices":[{"text":"Size30","price":"20","isSelected":"true"},{"text"
:"Size32","price":"22","isSelected":false},{"text":"Size34","price":"28","isSelected":false}],"conditionalLogic"
:""},{"type":"product","id":2,"label":"Color","placeholder":"Select Color","description":"","defaultValue"
:{"text":"Black","price":"10"},"choices":[{"text":"Black","price":"10","isSelected":"true"},{"text"
:"Green","price":"22","isSelected":false},{"text":"Red","price":"28","isSelected":false}],"conditionalLogic"
:""},{"type":"product","id":3,"label":"Rise","placeholder":"Select Rise","description":"","defaultValue"
:{"text":"Low","price":"8"},"choices":[{"text":"High","price":"12","isSelected":"true"},{"text"
:"Low","price":"8","isSelected":false}],"conditionalLogic"
:""}]';
try
var arr = JSON.parse(obj).map( function(item){
return item.defaultValue;
});

How to pass array from controller to javascript?

I want to pass array (2 dimension) from controller to javascript variable. I use session to pass but this not work. In javascript code I use like this:
var data = '<%= Session["LatLon"] %>';
when run project and use inspect element, there is in data :
how to pass? Can i Pass array with 2 dim with session?

When inserting the value into Session["LatLon"], save it as JSON instead of a C# string array.
string[][] mystringarr = ...
Session["LatLon"] = JsonConvert.SerializeObject(mystringarr);
And in the view use
var data = <%= Session["LatLon"] %>;
So it will generate something like
var data = [["1.0", "1.4"], ["4.6","4.8"]];
Using JSON.NET
http://www.newtonsoft.com/json/help/html/M_Newtonsoft_Json_JsonConvert_SerializeObject.htm

What you are currently observing is a result of execution .ToString method of Session["LetLon"] object.
What you intent to receive is var data = [[1, 2], [3, 4]];.
So you can simply write a correct stringification of your two-dimensional array. I suggest to write simple extension method:
public static string ToJsString(this string[,] array) {
return Enumerable.Range(0, array.GetLength(0))
.Aggregate(new StringBuilder(),
(sbi, i) => sbi.AppendFormat(i == 0 ? "{0}" : ", {0}",
Enumerable.Range(0, array.GetLength(1))
.Aggregate(new StringBuilder(),
(sbj, j) => sbj.AppendFormat(j == 0 ? "{0}" : ", {0}", array[i,j]),
sbj => string.Format("[{0}]", sbj))),
sb => string.Format("[{0}]", sb));
}
In order to use it write then var data = <%= ((string[,])Session["LatLon"]).ToJsString() %>.

how to add another value to the existing JSON object in ruby on rails and Javascript?

In the model i have like,
def question_hash_string
#question_hash_string || '{}'
end
def question_hash
ActiveSupport::JSON.decode question_hash_string
end
In the Javascript,
var question_hash_element = document.getElementById('enr_rds_batch_update_question_hash_string');
var question_hash = JSON.parse(question_hash_element.value);
question_hash[batch_question_id] = (batch_answer_id || batch_rdsap_answer || batch_answer_checkbox);
question_hash_element.value = JSON.stringify(question_hash);
It would give the values like "{"16":"3","28":false}"
I want to add another value with the answer like the following,
question_hash[batch_question_id] = ((batch_answer_id || batch_rdsap_answer || batch_answer_checkbox) && (build_id));
"{"16":"3","28":false:"2", "3":"55":"54"}" and so on. I need to add another column with the existing record with ':'.

Adding a key/value pair to a javascript object :
var question_hash = { question_id:2, answer_id:3 };
question_hash.build_id = 6;

You can add a new element in the JabvaScript code.
function doSomething(value) {
var jsonValues = getParameters();
jsonValues.value3 = value; //Here you add a new value in your json
}
//Example of function to generate json
function getParameters() {
return {
value: 'a',
value1: 'b',
value2: 'c'
};
}

Categories