c# - gridview data export to excel in asp.net -


i tried transfer grid view data excel .... output blank excel sheet.how solve problem?is there code transfer grid view value excel sheet data base?

protected void btnexcel_click1(object sender, eventargs e) {     response.clear();     response.buffer = true;     response.addheader("content-disposition", "attachment;filename=gridviewexport.xls");     response.charset = "";     response.contenttype = "application/vnd.ms-excel";      stringwriter sw = new stringwriter();     htmltextwriter hw = new htmltextwriter(sw);      gvdetails.allowpaging = false;     gvdetails.databind();      gvdetails.headerrow.style.add("background-color", "#ffffff");     gvdetails.headerrow.cells[0].style.add("background-color", "green");     gvdetails.headerrow.cells[1].style.add("background-color", "green");     gvdetails.headerrow.cells[2].style.add("background-color", "green");     (int = 0; < gvdetails.rows.count;i++ )     {         gridviewrow row = gvdetails.rows[i];         row.backcolor = system.drawing.color.white;         row.attributes.add("class", "textmode");         if (i % 2 != 0)         {             row.cells[0].style.add("background-color", "#c2d69b");             row.cells[1].style.add("background-color", "#c2d69b");             row.cells[2].style.add("background-color", "#c2d69b");         }     }      string style = @"<style> .textmode { mso-number-format:\@; } </style>";      response.write(style);       response.output.write(sw.tostring());     response.end(); }

your sheet blank because string writer in null. here may help

system.web.ui.htmltextwriter htmlwrite =     new htmltextwriter(stringwrite);      gridview1.rendercontrol(htmlwrite);

here full code

protected void button1_click(object sender, eventargs e) {     response.clear();      response.addheader("content-disposition", "attachment;     filename=filename.xls");       response.contenttype = "application/vnd.xls";      system.io.stringwriter stringwrite = new system.io.stringwriter();      system.web.ui.htmltextwriter htmlwrite =     new htmltextwriter(stringwrite);      gridview1.rendercontrol(htmlwrite);      response.write(stringwrite.tostring());      response.end();  }

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