I'm using webmatrix to create a chart from my db. I have one cshtml file
var db = Database.Open("MyDB");
var data = @"SELECT ESTADO, COUNT(*) CNT FROM graficos WHERE ESTADO IS NOT
NULL GROUP BY ESTADO";
var resultadoSql = db.Query(data);
Json.Write(resultadoSql, Response.Output);
Response.ContentType = "application/json";
That is producing this result
[{"ESTADO":"ABERTO","CNT":63},{"ESTADO":"ASSOCIADO A AVARIA
PAI","CNT":9},{"ESTADO":"AVARIA PAI COM EM EXECUÇÃO","CNT":3},{"ESTADO":"AVARIA
PAI EM DESPISTE","CNT":3},{"ESTADO":"CANCELADO","CNT":3},{"ESTADO":"EM
DESPISTE","CNT":18},{"ESTADO":"EM
EXECUÇÃO","CNT":27},{"ESTADO":"FECHADO","CNT":189},{"ESTADO":"RESOLVIDO","CNT":51}]
And on the page that the chart will be displayed (yeap google charts :x)
// Load the Visualization API and the piechart package.
google.load('visualization', '1', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(drawChart);
function drawChart() {
var jsonData = $.ajax({
url: "teste.cshtml",
dataType:"json",
async: false
}).responseText;
// Create our data table out of JSON data loaded from server.
var data = new google.visualization.DataTable(jsonData);
// Instantiate and draw our chart, passing in some options.
var chart = new
google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, {width: 800, height: 600});
}
But i can't produce the chart it always says
Table has no columns.×
Then i've tried this that was on one example and it works, the chart is
created with the values.
{"cols":[
{"type":"string"},{"type":"number"}
],"rows":[
{"c": [{ "v": "ABERTO"},{"v":63} ]},
{"c": [{ "v": "ASSOCIADO A AVARIA PAI"},{"v":9} ]},
{"c": [{ "v": "AVARIA PAI COM EM"},{"v":3} ]},
{"c": [{ "v": "Resolvido"},{"v":55} ]}
]}
And i was thinking that perhaps the json file must be outputed this way ?
How can i achieve that ?
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