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Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed

3 Answers 1708 Views

AjaxPanel

This is a migrated thread and some comments may be shown as answers.

Ashbin asked on 08 Jul 2016, 09:26 AM

I have a button inside RadAjaxPanel and i want to export it to the Excel Sheet, Below is the code i had written to do this task. If i removed the RadAjaxpanel then i can export the datatable into excel sheet. But when trying to export it to Excel using radajax panel, I'm getting this error: Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed."

<telerik:RadAjaxPanel ID="mainPanel" runat="server" LoadingPanelID="RadAjaxLoadingPanel">

<table class="reportSearch">

<tr>

<td>

<telerik:RadButton ID="btnExcelDetail" runat="server" Text="Excel" OnClick="btnExcelDetail_Click" ValidationGroup="SearchValidation" ClientEvents-OnRequestStart="requestStart">

<Icon PrimaryIconUrl="~/App_Themes/RnDThemes/images/insert_table_on.gif" PrimaryIconHeight="15" />

</telerik:RadButton>

</td>

<td>

</table>

</telerik:RadAjaxPanel>

<script type="text/javascript">

function requestStart(sender, args) {

if (args.get_eventTarget().indexOf("btnExcelDetail") >= 0)

args.set_enableAjax(false);

}

</script>

public void ExporttoExcel(DataTable table, string filename)

{

try

{

HttpContext.Current.Response.Clear();

HttpContext.Current.Response.ClearContent();

HttpContext.Current.Response.ClearHeaders();

HttpContext.Current.Response.Buffer = true;

HttpContext.Current.Response.ContentType = "application/ms-excel";

HttpContext.Current.Response.Write(@"<!DOCTYPE HTML PUBLIC ""-//W3C//DTD HTML 4.0 Transitional//EN"">");

HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + filename + "");

HttpContext.Current.Response.Charset = "utf-8";

HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("windows-1250");

HttpContext.Current.Response.Write("<TABLE border='1' bgColor='#ffffff' " +

"borderColor='#000000' cellSpacing='0' cellPadding='0' " +

"style='font-size:10.0pt;background:white;'><TR>");

int columnscount = table.Columns.Count;

for (int j = 0; j < columnscount; j++)

{

HttpContext.Current.Response.Write(@"<TD><B>" + table.Columns[j].ToString() + "</B></TD>");

}

HttpContext.Current.Response.Write("</TR>");

foreach (DataRow row in table.Rows)

{

HttpContext.Current.Response.Write("<TR>");

for (int i = 0; i < table.Columns.Count; i++)

{

if (row[i].ToString().Trim().Length > 1 && row[i].ToString().Trim().StartsWith("0") && row[i].GetType().Name=="String")

HttpContext.Current.Response.Write("<TD style=\"mso-number-format:\\@\">");

else

HttpContext.Current.Response.Write("<TD>");

HttpContext.Current.Response.Write(row[i].ToString());

HttpContext.Current.Response.Write("</TD>");

}

HttpContext.Current.Response.Write("</TR>");

}

HttpContext.Current.Response.Write("</TABLE>");

HttpContext.Current.Response.Flush();

HttpContext.Current.Response.SuppressContent = true;

HttpContext.Current.ApplicationInstance.CompleteRequest();

}

catch (Exception) { }

3 Answers, 1 is accepted

Accepted

answered on 11 Jul 2016, 01:18 PM

Hi,

If you are using the built-in export functionality for our controls it should work out of the box. Please ensure that you are using the latest version of the controls. The current release is 2016.2.607.

Check out the following example that illustrates how you can export RadGrid to excel.

http://demos.telerik.com/aspnet-ajax/grid/examples/functionality/exporting/excel-export/defaultcs.aspx

In case you need to print the contents you can use the print feature:

http://demos.telerik.com/aspnet-ajax/grid/examples/functionality/printing/defaultcs.aspx?isNew=true

Regards,
Viktor Tachev
Telerik by Progress

Do you need help with upgrading your ASP.NET AJAX, WPF or WinForms projects? Check the Telerik API Analyzer and share your thoughts.

answered on 30 Nov 2016, 12:10 PM

Hello,

If you would like to specify the structure of the Excel file manually you can use the Export Infrastructure. Check out the following article that describes the functionality.

http://docs.telerik.com/devtools/aspnet-ajax/controls/export-infrastructure#basic-operations

When exporting the RadGrid you should use the InfrastructureExporting event and customize the Excel file.

http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/functionality/exporting/export-formats/xlsx-and-docx-export

Regards,
Viktor Tachev
Telerik by Progress

Telerik UI for ASP.NET AJAX is ready for Visual Studio 2017 RC! Learn more.