How can download a file through calling a javascript function using gecko browser in .NET ?

See more:

C#

.NET

WebBrowserControl

Gecko

Please follow this code then give me solution.

private void Form1_Load(object sender, EventArgs e)
        {
         
         geckoWebBrowser1.Navigate("http://localhost:62343/Test.html");
            
        }

private void scriptInvoke_Click(object sender, EventArgs e)
        {
            
            geckoWebBrowser1.Navigate("javascript:exportChart()");
         
        }

After running the application my geckobrowser can Load Test.html file. Then I want to call this function exportChart(). Using the that function I can Download a high chart from web. I have tested it through a button click from web like

<button id="buttonExport" onclick="exportChart()" >Export chart</button>

and it works fine and can download the high chart.

But when I load this html through geckoWebBrowser and want to call this exportChart() function. It does not work. I have tested it using alert in exportChart()function and alert is executed when I call the function from geckoWebbrowser but it can not download the file.

Please help me to find out the problem why gecko web browser can not download this file.