Reply To: Using CanvasJS with ASP.NET C# and SQL

[abraham1973]

Many Thanks, i don’t know if i can reply via this medium below is a section of my code that return datatable and convert to JSON

What I have tried:

unit of my code:

`mData = ConnectAll.GetDataObject(“Select sum(totalg9) as Total from tbl_htc2 group by months”);
try
{
var JSONString = new StringBuilder();
if (mData.Rows.Count > 0)
{
JSONString.Append(“[“);
for (int i = 0; i < mData.Rows.Count; i++)
{
JSONString.Append(“{“);
for (int j = 0; j < mData.Columns.Count; j++)
{
if (j < mData.Columns.Count – 1)
{
JSONString.Append(“\”” + mData.Columns[j].ColumnName.ToString() + “\”:” + “\”” + mData.Rows[i][j].ToString() + “\”,”);
}
else if (j == mData.Columns.Count – 1)
{
JSONString.Append(“\”” + mData.Columns[j].ColumnName.ToString() + “\”:” + “\”” + mData.Rows[i][j].ToString() + “\””);
}
}
if (i == mData.Rows.Count – 1)
{
JSONString.Append(“}”);
}
else
{
JSONString.Append(“},”);
}
}
JSONString.Append(“]”);
}

Response.Redirect(string.Format(“~/data_load/monthly_trend.aspx?mData={0}”, JSONString.ToString()));

The page that render the chart :

window.onload = function () {
var mTD = ‘ <%=this.DT%>’
var chart = new CanvasJS.Chart(“chartContainer”,
{
title: {
text: “Trend Analysis”
},
axisY: {
// minimum: 50,
maximum: 300,
interval:50
},
axisX: {
// minimum: 50,
maximum: 200
//interval:-10
},
data: [
{
type: “column”,
dataPoints: [
mTD
]
}
]
});

chart.render();
}