protected void lnkAdvExportToExcel_Click(object sender, EventArgs e)
{
DataTable dtExport = new DataTable();
string strReportName = DateTime.Now.ToString("dd MMMM yyyy");
if (grdSearchPO.Rows.Count <= 0)
{
if (ViewState["vwExportTable"] != null)
{
dtExport = (DataTable)ViewState["vwExportTable"];
}
grdSearchPO.DataSource = dtExport;
grdSearchPO.DataBind();
}
grdSearchPO.Columns[0].Visible = false;
string title = string.Empty;
string totalString = string.Empty;
string attachment = string.Empty;
System.Web.HttpContext.Current.Response.Clear();
System.Web.HttpContext.Current.Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", strReportName + ".xls"));
System.Web.HttpContext.Current.Response.ContentType = "application/ms-excel";
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
// Create a table to contain the grid
Table table = new Table();
//Adding Header
if (grdSearchPO.HeaderRow != null)
{
GridViewExportUtil.PrepareControlForExport(grdSearchPO.HeaderRow);
table.Rows.Add(grdSearchPO.HeaderRow);
}
// add each of the data rows to the table
foreach (GridViewRow row in grdSearchPO.Rows)
{
GridViewExportUtil.PrepareControlForExport(row);
table.Rows.Add(row);
}
// render the table into the htmlwriter
table.RenderControl(htw);
// render the htmlwriter into the response
System.Web.HttpContext.Current.Response.Write(sw.ToString());
System.Web.HttpContext.Current.Response.End();
//System.Web.HttpContext.Current.Response.Flush();
}
}
}
/// <summary>
///
/// </summary>
/// <param name="fileName"></param>
/// <param name="gv"></param>
public static void Export(string fileName, GridView gv)
{
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader(
"content-disposition", string.Format("attachment; filename={0}", fileName));
HttpContext.Current.Response.ContentType = "application/ms-excel";
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
// Create a table to contain the grid
Table table = new Table();
// include the gridline settings
table.GridLines = gv.GridLines;
// add the header row to the table
if (gv.HeaderRow != null)
{
GridViewExportUtil.PrepareControlForExport(gv.HeaderRow);
table.Rows.Add(gv.HeaderRow);
}
// add each of the data rows to the table
foreach (GridViewRow row in gv.Rows)
{
GridViewExportUtil.PrepareControlForExport(row);
table.Rows.Add(row);
}
// add the footer row to the table
if (gv.FooterRow != null)
{
GridViewExportUtil.PrepareControlForExport(gv.FooterRow);
table.Rows.Add(gv.FooterRow);
}
// render the table into the htmlwriter
table.RenderControl(htw);
// render the htmlwriter into the response
HttpContext.Current.Response.Write(sw.ToString());
HttpContext.Current.Response.End();
}
}
}
/// <summary>
/// Replace any of the contained controls with literals
/// </summary>
/// <param name="control"></param>
public static void PrepareControlForExport(Control control)
{
for (int i = 0; i < control.Controls.Count; i++)
{
Control current = control.Controls[i];
if (current is LinkButton)
{
control.Controls.Remove(current);
control.Controls.AddAt(i, new LiteralControl((current as LinkButton).Text));
}
else if (current is ImageButton)
{
control.Controls.Remove(current);
control.Controls.AddAt(i, new LiteralControl((current as ImageButton).AlternateText));
}
else if (current is HyperLink)
{
control.Controls.Remove(current);
control.Controls.AddAt(i, new LiteralControl((current as HyperLink).Text));
}
else if (current is DropDownList)
{
control.Controls.Remove(current);
control.Controls.AddAt(i, new LiteralControl((current as DropDownList).SelectedItem.Text));
}
else if (current is CheckBox)
{
control.Controls.Remove(current);
control.Controls.AddAt(i, new LiteralControl((current as CheckBox).Checked ? "True" : "False"));
}
if (current.HasControls())
{
GridViewExportUtil.PrepareControlForExport(current);
}
}
}
