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POhow to hide and unhide the columns of an excel sheet using asp.net
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  1. POhow to hide and unhide the columns of an excel sheet using asp.net
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    copied!<p>I am having one functionality which need to be implemented.</p> <p>We are binding the Grid data to the excel export and it is working fine. But i got the new requirement where i have to hide the columns in the excel export. After that when user open the excel sheet he should have the option to UN-hide again the columns which we hide through code.</p> <p>Edit: </p> <p>I have a gridview control on my .aspx page which I am exporting to excel using the following code:</p> <pre><code> public static void Export(string filename, GridView grid) { HttpContext.Current.Response.Clear(); HttpContext.Current.Response.Buffer = true; HttpContext.Current.Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", filename.Replace(" ", "") + ".xls")); HttpContext.Current.Response.Charset = ""; HttpContext.Current.Response.ContentType = "application/vnd.xls"; StringWriter sw = new StringWriter(); HtmlTextWriter htw = new HtmlTextWriter(sw); grid.HeaderStyle.BackColor = System.Drawing.Color.Cyan; GridViewRow row = new GridViewRow(0, 1, DataControlRowType.DataRow, DataControlRowState.Normal); TableCell cell = new TableCell(); cell.Text = String.Format("{0}", Heading[count]); cell.ColumnSpan = grid.Rows[1].Cells.Count; cell.Attributes.Add("style", "background-color: white; color: black;text-align:left;"); cell.Attributes.Add("class", "yellow"); row.Cells.Add(cell); grid.Controls[0].Controls.AddAt(0, row); grid.RenderControl(htw); DataTable dt = new DataTable(); DataRow dr; dt.Columns.Add(new System.Data.DataColumn(" ", typeof(String))); dr = dt.NewRow(); dr[0] = " "; dt.Rows.Add(dr); GridView gvSpace = new GridView(); gvSpace.DataSource = dt; gvSpace.GridLines = 0; gvSpace.DataBind(); gvSpace.RenderControl(htw); grid.HeaderStyle.BackColor = System.Drawing.Color.Cyan; HttpContext.Current.Response.Write(@"&lt;style&gt; .sborder { color : Black;border : 1px Solid Black; } .yellow {background-color:yellow;color:black;} &lt;/style&gt; "); HttpContext.Current.Response.Write(sw.ToString()); HttpContext.Current.Response.End(); HttpContext.Current.Response.Flush(); } </code></pre> <p>The requirement is to <code>hide</code> some columns (in RowDataBound or a similar event) before the gridview is exported to excel and the user who exported the file should be able to <code>unhide</code> the hidden columns after opening the file in Microsoft Excel. As the grid view is rendenred as <code>html</code> i have tried using <code>display:none</code>, this is hiding the column but I am not able to <code>unhide</code> it in the Microsoft excel.</p> <p>So how can I hide grid view columns before exporting it to excel and unhide the columns when I open the file in Microsoft excel? </p>
 

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