Unable to export HTML table content to excel in ASP.NET

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C#

when the html table is exported to excel from asp.net the table is displayed but the content inside the table is not displayed  below is my code

C#

protected void btnExportToExcel_Click(object sender, EventArgs e)
        {
            Response.Clear();
            Response.Buffer = true;
            lblCategorystatusReportHeader.Visible = true;
            Response.AddHeader("content-disposition",
             "attachment;filename=StatusReport.xls");
            Response.Charset = "";
            Response.ContentType = "application/vnd.ms-excel";
            StringWriter sw = new StringWriter();
            HtmlTextWriter hw = new HtmlTextWriter(sw);

            //Panel preOrderPanel = (Panel)rpt1.FindControl("pnlPreOrder");
            //rptCP.RenderControl(hw);
            //pnlPreOrder.RenderControl(hw);
            order.RenderControl(hw);
            string output = sw.ToString();
            output = "<html><head><meta charset=" + Encoding.UTF8.WebName + " /></head><body>" + output + "</body></html>";
            Response.Output.Write(output);
            
            Response.Flush();
            Response.End();
            lblCategorystatusReportHeader.Visible = false;
        }

below is the aspx code

ASP.NET

this is the aspx code

<asp:Panel ID="order" runat="server">
    <table>
     <tr style="text-align:center">
            <td colspan="20" style="font-size:16px; padding-removed100px;background-color:#90cad9;border:1px solid black;display:none">
                <asp:Label ID="lblCategorystatusReportHeader" runat="server" Text="Status Report">
            </td>
        </tr>
        </table>
     <table>
        <tr>
           <td>
                
           </td>
        </tr>
    </table>
     <asp:Table ID="tbColor" runat="server" BorderWidth="1" GridLines="Both" BorderColor="Black" >
                <asp:TableRow ID="trColor" runat="server" >
                    <asp:TableCell ID="tdLegend" BorderWidth="2" Style="text-align:center">
                        <asp:Label ID="lblLegend" Text="Legend" runat="server">
                            
                    <asp:TableCell ID="tdOnTime" BorderWidth="2" Style="text-align:center">
                        <asp:Label ID="lblOntime" Text="On Time" ForeColor="White" runat="server">
                        
                     
                    <asp:TableCell ID="tdAceeptableDelay" BorderWidth="2" Style="text-align:center">
                        <asp:Label ID="lblAcceptableDelay" Text="Acceptable Delay" ForeColor="White" runat="server">
                    
                    <asp:TableCell ID="tdDelayed" BorderWidth="2" Style="text-align:center">
                        <asp:Label ID="lblDelayed" Text="Delayed" ForeColor="White" runat="server">
                    
                    
                
            
    <table>
        <tr>
           <td>
                
           </td>
        </tr>
    </table>
    
    <table>
          <%-- <tr style="text-align:center">
            <td colspan="20" style="font-size:16px; padding-removed100px;background-color:#90cad9;border:1px solid black;display:none">
                <asp:Label ID="lblCategorystatusReportHeader" runat="server" Text="Category Status Report">
            </td>
        </tr>--%>
        <tr>
            <td style="width:150px !important;vertical-align:middle;text-align:center; border-style:solid; border-width:1px" rowspan="2">
                <asp:Label ID="lblCPPre" runat="server">
            </td>
            <td>
               <%-- <asp:Panel ID="pnlPreOrder" runat="server">--%>
                    <table border="1" style="border-collapse:collapse">
                        <tr>
                            <%--<td stylwe="width:40px">
                                <asp:Label ID="lblCPPre" runat="server">
                            </td>--%>
                            <td style="vertical-align:middle;background-color:#90cad9;text-align:center">
                                <div style="width:100px !important">Category CP</div>
                            </td>
                            <td>
                                    <asp:Label ID="lblMessagePre" runat="server" Text="No Records found" Visible ="false" ForeColor="Red">
                                    <asp:Repeater ID="rptStylePO" runat="server" OnItemDataBound="rptStylePO_ItemDataBound">
                                        <itemtemplate>
                                            <table border="1" style="border-collapse:collapse;border-spacing:0px">
                                                <tr>
                                                    <td class="stylestatusReport">
                                                       <div style="width:100px !important"> <asp:HiddenField ID="styleid" runat="server" Value='<%# Container.DataItem.ToString() %>'/>
                                                        <asp:Label ID="lblStyle" runat="server"></div>
                                                    </td>
                                                    <td>
                                                        <asp:Label ID="lblNoMilestonePre" runat="server" Text="No Records found" Visible ="false" ForeColor="Red">
                                                        <asp:Repeater ID="rptt" runat="server" OnItemDataBound="rptt_ItemDataBound">
                                                            <itemtemplate>
                                                                <table>
                                                                    <tr>
                                                                        <td style="width:60px;vertical-align:middle;text-align:center">
                                                                            <div style="width:60px !important"><asp:HiddenField ID="stlId" runat="server" Value='<%# Container.DataItem.ToString() %>' /></div>
                                                                            
                                                                        </td>
                                                                        <td>
                                                                            <asp:DataList ID="dataListPO" runat="server" RepeatDirection="Horizontal" OnItemDataBound="dataListPO_ItemDataBound">
                                                                                <itemtemplate>
                                                                                    <table border="1" style="border-collapse:collapse; border-spacing:0px">
                                                                                        <tr>
                                                                                            <td style="word-wrap:break-word;width:110px; height:60px; color:#000000;vertical-align:middle;text-align:center; background-color:#90cad9 ; font-size:11px;">
                                                                                               <div style="word-wrap:break-word;width:100%;font-size:13px">
                                                                                                    <asp:Label ID="lblMilestoneValue" runat="server" Text='<%# Eval("MilestoneName") %>'></div>
                                                                                            </td>
                                                                                        </tr>
                                                                                        <tr>
                                                                                            <td style="text-align:left;">
                                                                                                <asp:Table ID="tblStatus" runat="server" Width="100%">
                                                                                                    <asp:TableRow ID="rowStatus" runat="server">
                                                                                                   
                                                                                                     <asp:TableCell ID="cellStatus1" Width="25px"  runat="server"><div style="width:100px; text-align:justify"><asp:Label ID="lblForecastedDate" Font-Size="13px" runat="server" Width="50%" ForeColor="Black"></div>
                                                                                                    <asp:TableCell ID="cellStatus" Width="25px" runat="server">  <div style="width:100px; text-align:center">                                                                                                      
                                                                                                        <asp:Label ID="lblStatus" Font-Size="13px" runat="server"  ForeColor="White"></div>                                                                                                 
                                                                                                    
                                                                                                   
                                                                                                                                                      
                                                                                                <asp:HiddenField ID="hdnPlannedDate" runat="server" Value='<%# Eval("MilestonePlannedDate") %>'>
                                                                                                <asp:HiddenField ID="hdnRevisedDate" runat="server" Value='<%# Eval("MilestoneRevisedDate") %>'>
                                                                                                <asp:HiddenField ID="hdnActualDate" runat="server" Value='<%# Eval("MilestoneActualDate") %>'>
                                                                                                <asp:HiddenField ID="hdnMilestoneStatus" runat="server" Value='<%# Eval("MilestoneStatus") %>' />
                                                                                            </td>
                                                                                        </tr>
                                                                                    </table>
                                                                                </itemtemplate>
                                                                            
                                                                         </td>
                                                                    </tr>
                                                                 </table>
                                                            </itemtemplate>
                                                        
                                                    </td>
                                                </tr>
                                            </table>
                                        </itemtemplate>
                                    
            
                            </td>
                        </tr>
                    </table>
               <%-- --%>
            </td>
        </tr>
        <tr>
            <td>
               <%-- <asp:Panel ID="pnlPostOrder" runat="server">--%>
                    <table border="1" style="border-collapse:collapse;">
                        <tr>
                            <%--<td style="width:40px">
                                <asp:Label ID="lblCPPost" runat="server">
                            </td>--%>
                            <td style=" background-color:#90cad9; font-size:14px;vertical-align:middle;text-align:center;white-space:nowrap; "><div style="width: 100px;">Item CP</div></td>
                            <td style="font-size:14px">
                                <asp:Label ID="lblMessagePost" runat="server" Text="No Records found" Visible ="false" ForeColor="Red">
                                    <asp:Repeater ID="rptStylePostOrder" runat="server" OnItemDataBound="rptStylePostOrder_ItemDataBound">
                                        <itemtemplate>
                                            <table border="1" style="border-collapse:collapse">
                                                <tr>
                                                    <td class="stylestatusReport">
                                                        <div style="width:100px !important"><asp:HiddenField ID="styleid" runat="server" Value='<%# Container.DataItem.ToString() %>'/>
                                                        <asp:Label ID="lblStyle" runat="server"></div>
                                                    </td>
                                                    <td>
                                                        <asp:Label ID="lblNoMilestonePost" runat="server" Text="No Records found" Visible ="false" ForeColor="Red">
                                                        <asp:Repeater ID="rptPO" runat="server" OnItemDataBound="rptPO_ItemDataBound">
                                                            <itemtemplate>
                                                                <table>
                                                                    <tr>
                                                                        <td style="word-wrap:break-word;width:60px;vertical-align:middle;text-align:center;">
                                                                            <div style="width:60px">
                                                                                <asp:Label ID="lblPostOrderNumber" runat="server">
                                                                            <asp:HiddenField ID="hdnStylePOID" runat="server" Value='<%# Container.DataItem.ToString() %>'/></div>    
                                                                        </td>
                                                                        <td>
                                                                            <asp:DataList ID="dataListPostOrder" runat="server" RepeatDirection="Horizontal" OnItemDataBound="dataListPostOrder_ItemDataBound">
                                                                                <itemtemplate>
                                                                                    <table border="1" style="border-collapse:collapse">
                                                                                        <tr>
                                                                                            <td style="word-wrap:break-word;width:110px; height:60px;background-color:#90cad9 ; font-size:11px;vertical-align:middle;text-align:center">
                                                                                                <div style="word-wrap:break-word;width:100%; font-size:13px"><asp:Label ID="lblMilestoneValuePost" runat="server" Text='<%# Eval("MilestoneName") %>'></div>
                                                                                            </td>
                                                                                        </tr>
                                                                                        <tr>
                                                                                            <td style="text-align:left">
                                                                                                <asp:Table ID="tblStatusPost" runat="server" Width="100%">
                                                                                                    <asp:TableRow ID="rowStatusPost" runat="server">
                                                                                                     <asp:TableCell ID="cellStatus1Post" Width="25px"  runat="server">
                                                                                                         <div style="width:100px;text-align:justify;"><asp:Label ID="lblForecastedDatePost" Font-Size="13px" runat="server" Width="50%" ForeColor="Black"></div>
                                                                                                    <asp:TableCell ID="cellStatusPost" runat="server"><div style="width:100px;text-align:center">
                                                                                                        <asp:Label ID="lblStatusPost" Font-Size="13px" runat="server" Width="100%" ForeColor="White"></div>
                                                                                                <asp:HiddenField ID="hdnPlannedDatePost" runat="server" Value='<%# Eval("MilestonePlannedDate") %>'>
                                                                                                <asp:HiddenField ID="hdnRevisedDatePost" runat="server" Value='<%# Eval("MilestoneRevisedDate") %>'>
                                                                                                <asp:HiddenField ID="hdnActualDatePost" runat="server" Value='<%# Eval("MilestoneActualDate") %>'>
                                                                                                <asp:HiddenField ID="hdnMilestoneStatusPost" runat="server" Value='<%# Eval("MilestoneStatus") %>' />
                                                                                            </td>
                                                                                        </tr>
                                                                                    </table>
                                                                                </itemtemplate>
                                                                            
                                                                        </td>
                                                                    </tr>
                                                                </table>

                                                            </itemtemplate>

                                                        
                                                    </td>
                                                </tr>
                                            </table>
                                        </itemtemplate>
                                    
           
                            </td>
                        </tr>
                    </table>
               <%-- --%>
            </td>
        </tr>
    </table>
this this image of the actual table 
<a href="http://i.stack.imgur.com/ghl8I.png">http://i.stack.imgur.com/ghl8I.png</a>[<a href="http://i.stack.imgur.com/ghl8I.png" target="_blank" title="New Window">^</a>]

below is the image that is being displayed in excel

<a href="http://i.stack.imgur.com/at6dw.png">http://i.stack.imgur.com/at6dw.png</a>[<a href="http://i.stack.imgur.com/at6dw.png" target="_blank" title="New Window">^</a>]

What I have tried:

i tried to debug the issue and i tried for fix in internet which i never got

Posted 15-May-16 18:58pm

madhankannan

Updated 16-May-16 3:43am

v4

Add a Solution

Comments

Karthik_Mahalingam 16-May-16 1:01am

what is'order' object

madhankannan 16-May-16 1:03am

it's a panel

Karthik_Mahalingam 16-May-16 1:30am

post the link where you got this example

madhankannan 16-May-16 1:33am

it was in codeproject oly

Karthik_Mahalingam 16-May-16 1:37am

i tested your code with sample table inside a panel
it works fine..
what is the issue

madhankannan 16-May-16 1:45am

the table is displaying but content inside it is not displayed

Karthik_Mahalingam 16-May-16 1:46am

post your sample html data

Karthik_Mahalingam 16-May-16 1:53am

i have tested with this data and it worked
<asp:Panel ID="panel" runat="server">
<table>
<tr>
<td>ID</td><td>Name</td><td>Address</td>
</tr>
<tr>
<td>1</td><td>a</td><td>a1</td>
</tr>
<tr>
<td>2</td><td>b</td><td>b1</td>
</tr>
</table>

madhankannan 16-May-16 1:55am

this is the aspx code

<asp:Panel ID="order" runat="server">
<table>
<tr style="text-align:center">
<td colspan="20" style="font-size:16px; padding-left:100px;background-color:#90cad9;border:1px solid black;display:none">
<asp:Label ID="lblCategorystatusReportHeader" runat="server" Text="Status Report">
</td>
</tr>
</table>
<table>
<tr>
<td>

</td>
</tr>
</table>
<asp:Table ID="tbColor" runat="server" BorderWidth="1" GridLines="Both" BorderColor="Black" >
<asp:TableRow ID="trColor" runat="server" >
<asp:TableCell ID="tdLegend" BorderWidth="2" Style="text-align:center">
<asp:Label ID="lblLegend" Text="Legend" runat="server">

<asp:TableCell ID="tdOnTime" BorderWidth="2" Style="text-align:center">
<asp:Label ID="lblOntime" Text="On Time" ForeColor="White" runat="server">

<asp:TableCell ID="tdAceeptableDelay" BorderWidth="2" Style="text-align:center">
<asp:Label ID="lblAcceptableDelay" Text="Acceptable Delay" ForeColor="White" runat="server">

<asp:TableCell ID="tdDelayed" BorderWidth="2" Style="text-align:center">
<asp:Label ID="lblDelayed" Text="Delayed" ForeColor="White" runat="server">

<table>
<tr>
<td>

</td>
</tr>
</table>

<table>
<%-- <tr style="text-align:center">
<td colspan="20" style="font-size:16px; padding-left:100px;background-color:#90cad9;border:1px solid black;display:none">
<asp:Label ID="lblCategorystatusReportHeader" runat="server" Text="Category Status Report">
</td>
</tr>--%>
<tr>
<td style="width:150px !important;vertical-align:middle;text-align:center; border-style:solid; border-width:1px" rowspan="2">
<asp:Label ID="lblCPPre" runat="server">
</td>
<td>
<%-- <asp:Panel ID="pnlPreOrder" runat="server">--%>
<table border="1" style="border-collapse:collapse">
<tr>
<%--<td stylwe="width:40px">
<asp:Label ID="lblCPPre" runat="server">
</td>--%>
<td style="vertical-align:middle;background-color:#90cad9;text-align:center">
<div style="width:100px !important">Category CP</div>
</td>
<td>
<asp:Label ID="lblMessagePre" runat="server" Text="No Records found" Visible ="false" ForeColor="Red">
<asp:Repeater ID="rptStylePO" runat="server" OnItemDataBound="rptStylePO_ItemDataBound">
<itemtemplate>
<table border="1" style="border-collapse:collapse;border-spacing:0px">
<tr>
<td class="stylestatusReport">
<div style="width:100px !important"> <asp:HiddenField ID="styleid" runat="server"

Patrice T 16-May-16 1:59am

Use Improve question to update your question.

madhankannan 16-May-16 2:02am

okay

Karthik_Mahalingam 16-May-16 2:02am

what you are trying to do in the aspx page.
you have messed up the markup code..

madhankannan 16-May-16 2:07am

i just started working on this project and the aspx code was a existing code

Karthik_Mahalingam 16-May-16 2:40am

give a screen shot link for the actual table on the page.. not the exported data excel file

madhankannan 16-May-16 2:47am

http://i.stack.imgur.com/ghl8I.png

Karthik_Mahalingam 16-May-16 2:49am

ok bro, i will chk your code..

madhankannan 16-May-16 2:51am

okay thank you

Karthik_Mahalingam 16-May-16 3:10am

are you using update panel ?

madhankannan 16-May-16 3:54am

no

Karthik_Mahalingam 16-May-16 4:00am

i have tested your code, it works perfect,
the problem is with the thing you are explaining to us..

Karthik_Mahalingam 16-May-16 4:24am

try to copy the html from view source and test it in a seperate page..

madhankannan 16-May-16 5:07am

this is office project u can't access like that

Karthik_Mahalingam 16-May-16 5:09am

ok

madhankannan 16-May-16 5:13am

do u have any solution

Karthik_Mahalingam 16-May-16 5:14am

bro, i am telling you again and again, it working perfectly for me,
something wrong in ur code only..
which i want to examine..

Karthik_Mahalingam 16-May-16 5:27am

no no.. dont..
its a violation..

Patrice T 16-May-16 1:06am

Where do you fill sw ?

madhankannan 16-May-16 1:11am

i m filling sw to output string

Patrice T 16-May-16 1:13am

I know you fill output with sw, but what you put in sw ? and where ?

madhankannan 16-May-16 1:19am

this is the first time i m working on export to excel .i found this code in
google and the same code works well for an other table.

Patrice T 16-May-16 1:29am

Impossible, can't be the same code.

madhankannan 16-May-16 1:31am

this is the code for that table

protected void btnExportToExcel_Click(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=ComplianceReport.xls");
Response.Charset = "";
Response.ContentType = "application/vnd.ms-excel";

StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);

//rptCustomers.RenderControl(hw);
// this.ltExcelCPtitle.Visible = true;

pnlComplianceData.RenderControl(hw);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
// ltExcelCPtitle.Visible = false;
}

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santosh.yadav198613 · Answer 1 · 2016-05-16T01:35:00

Solution 4

You can use NPOI as well, its available on nuget , sample code is available as well.

Link below : NPOI
[^]

Posted 16-May-16 1:35am

santosh.yadav198613

Beginner Luck · Answer 2 · 2016-05-15T19:12:00

I use javascript for html table to excel

JavaScript

$("#btnExport").click(function (e) {
    window.open('data:application/vnd.ms-excel,' + $('#dvData').html());
    e.preventDefault();
});

HTML

<div id="dvData">
    <table>
        <tr>
            <th>Column One</th>
            <th>Column Two</th>
            <th>Column Three</th>
        </tr>
        <tr>
            <td>row1 Col1</td>
            <td>row1 Col2</td>
            <td>row1 Col3</td>
        </tr>
        <tr>
            <td>row2 Col1</td>
            <td>row2 Col2</td>
            <td>row2 Col3</td>
        </tr>
        <tr>
            <td>row3 Col1</td>
            <td>row3 Col2</td>
            <td><a href="http://www.google.com/">google</a>
            </td>
        </tr>
    </table>
</div>

Sergey Alexandrovich Kryukov · Answer 3 · 2016-05-16T03:43:00

You can use Microsoft Open XML Format SDK. See, for example, this CodeProject article:
Creating basic Excel workbook with Open XML[^].

NPOI is another option: NPOI — Home[^].

See also my past answers on the topic referenced in this one: How to add microsoft excel 15.0 object library from Add Reference in MS Visual Studio 2010[^].

—SA

Patrice T · Answer 4 · 2016-05-15T19:57:00

Quote:
when the html table is exported to excel from asp.net the table is displayed but the content inside the table is not displayed below is my code

The code that deal with your html table is not here.

The only possible advice is "use the debugger to see what your code is doing".

The debugger allow you to follow the execution line by line, inspect variables and you will see that there is a point where it stop doing what you expect.
Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]

Karthik_Mahalingam · Answer 5 · 2016-05-16T00:57:00

Solution 3

Remove all the hidden fields in the table and try to generate the excel, it should work.
refer this asp.net - Remove control from repeater before rendering - Stack Overflow[^]

if you want to retain the existing hidden controls, then you can create a duplicate copy of the panel without hidden fields and make the it hidden (display:none) and use this panel for rendering the html.

Posted 16-May-16 0:57am

Karthik_Mahalingam

Comments

Karthik_Mahalingam 16-May-16 7:31am

comment all the hidden fields and check

madhankannan 16-May-16 7:34am

okay how do i remove the hidden fields

Karthik_Mahalingam 16-May-16 7:35am

just comment it like this

<%--<asp:HiddenField ID="styleid" runat="server" Value='some' />--%>

madhankannan 16-May-16 7:44am

i m getting error when i comment hiddenfields

Karthik_Mahalingam 16-May-16 7:45am

what error

madhankannan 16-May-16 7:48am

object reference can't be null
HiddenField hd = (HiddenField)e.Item.FindControl("styleid");
int i = Convert.ToInt16(hd.Value);

Karthik_Mahalingam 16-May-16 7:50am

after that line.. int i = Convert.ToInt16(hd.Value);

add this ev.Item.Controls.Remove(hd);

madhankannan 16-May-16 7:57am

what is ev

Karthik_Mahalingam 16-May-16 8:00am

its e

madhankannan 16-May-16 8:04am

still same error " Object reference not set to an instance of an object."

Karthik_Mahalingam 16-May-16 8:07am

un comment the hidden fields.
<asp:HiddenField ID="styleid" runat="server" Value='some' />

wherever, after reading the values from hidden field and remove the hidden fields
as
e.Item.Controls.Remove(hd);

madhankannan 16-May-16 8:10am

i did, still same error

Karthik_Mahalingam 16-May-16 8:11am

un-comment all the hidden fields.

madhankannan 16-May-16 8:19am

still the data doesn't come up in excel

Karthik_Mahalingam 16-May-16 8:32am

got the solution..
revert back it to your orignal code..
dont do anything which i said...

just use the below code..
i have added one extra function.. and did some changes in the code...

protected void btnExportToExcel_Click(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
lblCategorystatusReportHeader.Visible = true;
Response.AddHeader("content-disposition",
"attachment;filename=StatusReport.xls");
Response.Charset = "";
Response.ContentType = "application/vnd.ms-excel";
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);

Panel panl = order;
var hiddens = GetAllControls(panl).OfType<hiddenfield>().ToList();

if (hiddens != null && hiddens.Count > 0)
foreach (HiddenField item in hiddens)
item.Parent.Controls.Remove(item);

panl.RenderControl(hw);
string output = sw.ToString();
output = "<html><head><meta charset=" + Encoding.UTF8.WebName + " /></head><body>" + output + "</body></html>";
Response.Output.Write(output);

Response.Flush();
Response.End();
lblCategorystatusReportHeader.Visible = false;
}

public static IEnumerable<control> GetAllControls(Control parent)
{
foreach (Control control in parent.Controls)
{
yield return control;
foreach (Control descendant in GetAllControls(control))
{
yield return descendant;
}
}
}

Unable to export HTML table content to excel in ASP.NET

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