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Thread ID: |
Created: |
Updated: |
Platform: |
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| 151068 | Jan 29,2020 07:14 PM UTC | Feb 11,2020 05:42 AM UTC | ASP.NET Web Forms | 7 |
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Tags: Chart |
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ChartFeatures.aspx
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<ej:Chart ID="Chart1" OnServerExporting="ExportChart">
<ExportSettings Mode="Server" />
</ej:Chart>
</ContentTemplate>
</asp:UpdatePanel>
<script type="text/javascript">
function download() {
$("#Chart1").ejChart("export");
}
</script>
</asp:Content>
ChartFeatures.aspx.cs
protected void ExportChart(object sender, Syncfusion.JavaScript.Web.ChartEventArgs e)
{
string Format = "png";
string FileName = "Chart";
string DataURL = e.Arguments["Data"].ToString();
DataURL = DataURL.Remove(0, DataURL.IndexOf(',') + 1);
MemoryStream stream = new MemoryStream(Convert.FromBase64String(DataURL));
stream.WriteTo(Response.OutputStream);
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", String.Format("attachment;filename={0}", FileName + "." + Format));
Response.Flush();
stream.Close();
stream.Dispose();
} |
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ChartFeatures.aspx
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<ej:Chart ID="Chart1" runat="server" OnServerExporting="ExportChart">
</ej:Chart>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Content>
ChartFeatures.aspx.cs
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.bindChartData();
}
}
private void bindChartData()
{
//Binding Datasource to Chart Series
for (int j = 0; j < this.Chart1.Series.Count; j++)
{
this.Chart1.Series[j].DataSource = data;
}
this.Chart1.DataBind();
} |
Hi Durga.I think I found the problem but I don't know how to solve... Every time I export the chart the application does two postback: one from the chart control and the other from the button. Here is my Page_Load function:protected void Page_Load(object sender, EventArgs e){if (!IsPostBack){Listdata = new List (); data.Add(new ColumnChartData("USA", 50, 70, 45));data.Add(new ColumnChartData("China", 40, 60, 55));data.Add(new ColumnChartData("Japan", 70, 60, 50));data.Add(new ColumnChartData("Australia", 60, 56, 40));data.Add(new ColumnChartData("France", 50, 45, 35));data.Add(new ColumnChartData("Germany", 40, 30, 22));data.Add(new ColumnChartData("Italy", 40, 35, 37));data.Add(new ColumnChartData("Sweden", 30, 25, 27));//Binding Datasource to Chartthis.Chart1.DataSource = data;this.Chart1.DataBind();}}I check if it is not a postback to prevent reloading the chart with the initial values (as it can be filtered by the RangeDatePicker control).But this render the chart empty on the page every time I export.So, should I reload the chart with the current liteblue value from the RangeDatePicker on every postback or there is a way to send the postback for export but without having to reload the chart control?Thanks for the support. Regards.
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