ExportToExcel functionality in a Class file

Question

Hi,
When
I call the below function in ButtonDownLoad_Click like:-
ExportToExcel(gv) ,I'm able to export the GridView contents to an xls
file.
Please refer attached
ExportToExcel.rar
But there so many aspx pages with GridViews which I need to export to excel.
So I tried to keep the above export-coding in a Class as below
public class Class1 : System.Web.UI.Page
{
public void ExportToExcel(GridView Gv)
{
Response.Clear();
Response.Buffer = true;
Response.ContentType = "application/vnd.ms-excel";
Response.Charset = "";
this.EnableViewState = false;
System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
//this.ClearControls(Gv);
Gv.RenderControl(oHtmlTextWriter);
Response.Write(oStringWriter.ToString());
Response.End();
}
}
protected void ButtonDownLoad_Click(object sender, EventArgs e)
{
// ExportToExcel(gv); // function call within same page works fine..
Class1 c1 = new Class1();
c1.ExportToExcel(gv);
}
After Button click ,Getting error as below...
"Response is not available in this context."
Please suggest the solution so that above class can be used in all the pages (to avoid keeping code in every page).
Thanks in advance...

theLizard · Answer

The error you are getting is valid, your class has no reference to the Page object.
Your method
public void ExportToExcel(GridView Gv)
change this to
public void ExportToExcel(Page page, GridView Gv)
then in your button down do this
c1.ExportToExcel(Page, gv);
Then in your method  where you have things like
Response.Clear();
change these to
page. Response.Clear();