export to excel[ .xlsx ]

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Hi all,

I am trying to export data to an excel file [.xlsx file].
but I am unable to open that file.
Its giving warning message
"Excel cannot open the file 'MyExport.xlsx' because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file"

Is any one knows the solution how to resolve this 2007 excel export issue.

C#

StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
myGrid.RenderControl(hw);

Response.Clear();
Response.Buffer = true;       
Response.AddHeader("content-disposition","attachment;filename=GridViewExport.xlsx");
Response.Charset = "";
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.Write(sw);
Response.End();

Posted 8-Nov-11 19:40pm

K V Sekhar

Updated 8-Nov-11 19:43pm

JF2015

v2

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Tejas Vaishnav · Answer 1 · 2011-11-08T21:43:00

try this code i think it will help you....
but one thing i clear that if your have put your gridview inside UpdatePanel Then any of your code will not work and its give the error like this...

Control 'GridView1' of type 'GridView' must be placed inside a form tag with runat=server.

put your grid out side the UpdatePanel and use this code it will work for me...

C#

protected void Export2Excel()
{
    try
    {
        this.GridView1.AllowPaging = false;
        this.GridView1.AllowSorting = false;
        this.GridView1.EditIndex = -1;

        // Let's bind data to GridView
        this.BindData();

        // Let's output HTML of GridView
        Response.Clear();
        Response.ContentType = "application/vnd.xls";
        // OR .xlsx file use this..
        // ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"

        Response.AddHeader("content-disposition",
                "attachment;filename=MyList.xls");
        Response.Charset = "";
        StringWriter swriter = new StringWriter();
        HtmlTextWriter hwriter = new HtmlTextWriter(swriter);
        GridView1.RenderControl(hwriter);
        Response.Write(swriter.ToString());
        Response.End();
    }
    catch (Exception exe)
    {
        throw exe;
    }
 
}

Vivek Krishnamurthy · Answer 2 · 2011-11-08T21:53:00

Solution 2

Refer to the similar question How to export gridview to excel ?[^], that was answered earlier.

Also, make sure you have mime map configured for xlsx in IIS.

Posted 8-Nov-11 21:53pm

Vivek Krishnamurthy

Comments

K V Sekhar 9-Nov-11 4:59am

I need to export data to excel 2007 version not later versions.
Also can't it possible to export data without configuring XLSX in IIS.
Because client machine there is no IIS.

NaVeN Kumar 1-Apr-13 1:11am

Hello Sekahr,

Have u got any solution for your question because I am also having same problem.