In my web project I download an xls file.
I generate a gridview with the data I need and download.
Once I open the excel, I need a column to be blocked.
My code is as follows:
private DataTable tableExcel;
public ActionResult returnExcel(HttpResponseBase response, string name)
{
var grid = new GridView();
grid.DataSource = tableExcel;
grid.DataBind();
GridViewRow HeaderGridRow = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Insert);
TableCell HeaderCell = new TableCell();
HeaderCell = new TableCell();
HeaderCell.Text = h.text;
HeaderCell.ColumnSpan = colunesSpan;
HeaderCell.Font.Bold = h.negreta;
HeaderCell.HorizontalAlign = h.aliniacio;
HeaderGridRow.Cells.Add(HeaderCell);
HeaderGrid.Controls[0].Controls.AddAt(0, HeaderGridRow);
response.ClearContent();
response.Buffer = true;
response.AddHeader("content-disposition", $"attachment; filename={name}.xls");
response.ContentType = "application/ms-excel";
response.Charset = "";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
grid.RenderControl(htw);
response.Output.Write(sw.ToString());
response.Flush();
response.End();
}
The code works correctly, the only thing I need is to be able to implement the option to block or freeze a column.
grid.Columns[0].Frozen = true;
grid.Rows[0].CssClass = "locked";
I found these solutions but they do not work for GridView.
Related
Currently my method is use for export excel file from gridview. Now I want to create dropdown list in some column for each row of excel file. It's possible to do with StringWriter?
There is my code of the method...
string exportFileName = Session["corpUser"].ToString() + "_ProjectExport_" + unixTimestamp + ".xls";
//Create a dummy GridView
GridView dummyGridView = new GridView();
dummyGridView.AllowPaging = false;
dummyGridView.DataSource = dt;
dummyGridView.DataBind();
//Write Dummy Gridview to Excel File
Response.Clear();
Response.AddHeader("content-disposition", "attachment;filename=" + exportFileName);
Response.ContentType = "application/ms-excel";
Response.ContentEncoding = System.Text.Encoding.Unicode;
Response.BinaryWrite(System.Text.Encoding.Unicode.GetPreamble());
System.IO.StringWriter sw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter hw = new HtmlTextWriter(sw);
dummyGridView.RenderControl(hw);
Response.Write(sw.ToString());
Response.End();
I want to export a list with over 10000 rows to excel using MVC5 C#.
when I export using DataGrid some columns are not shown in the excel file - 3 columns are disapeard in the excel file but all the 10000 rows appeard.
string filename = Guid.NewGuid() + ".xls";
StringWriter tw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(tw);
DataGrid dgGrid = new DataGrid();
List registrationsetList = db.RegistrationSet.Where(x => x.QuestionId == TheQuestion.Id).ToList();
dgGrid.DataSource = registrationsetList;
dgGrid.DataBind();
dgGrid.RenderControl(hw);
Response.BinaryWrite(System.Text.Encoding.UTF8.GetPreamble());
Response.ContentType = "application/vnd.ms-excel";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + filename + "");
Response.Write(tw.ToString());
Response.End();
If I change DataGrid dgGrid = new DataGrid()
to GridView dgGrid = new GridView();
with list of 600 of rows, the excel looks perfect with all the columns.
the problem is when i export all the list of 10000 rows, the excel file got stuck - i got not responding message.
why ?
Instead of using a DataGrid() try using a WebControl GridView():
string filename = Guid.NewGuid() + ".xls";
var gv = new System.Web.UI.WebControls.GridView();
var registrationsetList = db.RegistrationSet.Where(x => x.QuestionId == TheQuestion.Id);
g.DataSource = registrationsetList;
gv.DataBind();
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment; filename=" + filename);
Response.ContentType = "application/ms-excel";
Response.Charset = "";
StringWiter sw = new StringWriter();
var htw = new System.Web.UI.HtmlTextWriter(sw);
gv.RenderControl(htw);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
The problem (with that stucked excel file) was solved with DataGrid. The problem was that the DateGrid doen't show columns of nullable fields in the CLASS in the list that i bound to the GridView.
I am trying to export to excel the grid view data.I could bind the data in excel.However when I open the grid view I am losing its grid lines which looks really bad. I have added my code below.
This code takes my grid data and exports it to excel deleting all the gridlines i tried to google couldnt find a breaktrough can someone help me with this
protected void btn_export_Click(object sender, EventArgs e)
{
Response.Buffer = true;
Response.ClearContent();
Response.ClearHeaders();
Response.Charset = "";
string FileName = "Dashboard_FOR_PM" + DateTime.Now + ".xls";
StringWriter strwritter = new StringWriter();
HtmlTextWriter htmltextwrtter = new HtmlTextWriter(strwritter);
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("Content-Disposition", "attachment;filename=" + FileName);
grv_dashboard.GridLines = GridLines.Both;
grv_dashboard.HeaderStyle.Font.Bold = true;
grv_dashboard.RenderControl(htmltextwrtter);
Response.Write(strwritter.ToString());
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
Table table = new Table();
table.BorderStyle = BorderStyle.Solid;
table.BorderWidth=new Unit(1);
table.BorderColor = System.Drawing.Color.Black;
table.GridLines = GridLines.Both;
}
}
strwritter.Write(#"<html xmlns:x=""urn:schemas-microsoft-com:office:excel"">");
strwritter.Write(#"<head>
<xml>
<x:ExcelWorkbook>
<x:ExcelWorksheets>
<x:ExcelWorksheet>
<x:WorksheetOptions>
<x:Panes></x:Panes>
<x:Print><x:Gridlines /></x:Print>
</x:WorksheetOptions>
</x:ExcelWorksheet>
</x:ExcelWorksheets>
</x:ExcelWorkbook>
</xml>
</head>");
Response.End();
}
have a look at below function that I wrote before,please ask if something is unclear,hope it helps
public void ToExcel(DataTable dt, string reportName)
{
if (dt.Rows.Count > 0)
{
string filename = string.Format("{0}.xls", reportName);
System.IO.StringWriter sw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw);
HtmlForm hf = new HtmlForm();
DataGrid dg = new DataGrid();
dg.DataSource = dt;
dg.HeaderStyle.BackColor = Color.Tomato;//change to your own colors
dg.HeaderStyle.ForeColor = Color.White;//change to your own colors
dg.BackColor = Color.LightGoldenrodYellow;//change to your own colors
dg.AlternatingItemStyle.BackColor = Color.PaleGoldenrod;//change to your own colors
dg.Font.Name = "Tahoma";
dg.Font.Size = 10;
dg.GridLines = GridLines.Both;
dg.BorderColor = System.Drawing.Color.Black;
dg.BorderStyle = BorderStyle.Solid;
dg.BorderWidth = new Unit(1);
dg.DataBind();
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.Buffer = true;
HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment; filename=" + filename);
HttpContext.Current.Response.Charset = "";
EnableViewState = false;
Controls.Add(hf);
hf.Controls.Add(dg);
hf.RenderControl(htw);
HttpContext.Current.Response.Write(sw.ToString());
HttpContext.Current.Response.End();
}
}
I have a code that will generate an excel report.i am using ASP.NET MVC 4. I googled and found the same code everywhere still my code is not working why. My code in controller is as:
public ActionResult ExportData()
{
string[] abc = { "AAA", "BBB", "CCC" };
GridView gv = new GridView();
gv.DataSource = abc;
gv.DataBind();
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment; filename=Marklist.xls");
Response.ContentType = "application/ms-excel";
Response.Charset = "";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
gv.RenderControl(htw);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
return RedirectToAction("_EligibilityCriteria");
}
Just to test the export functionality I used an array abc this code is working in .net application but not in ASP.NET MVC 4 application. I have debugged the code but not found a problem or error in code.
What am I doing wrong here?
Finally found a way to export to excel.
public void ExportIniEmployeeToExcel(EligibilityCriteriaModel AllIniEmp)
{
List<AllIniEmployees> emp = new List<AllIniEmployees>();
AllIniEmp.allSuccessEmployeeList.ForEach(x =>
{
AllIniEmployees allEmp = new AllIniEmployees();
allEmp.EmployeeCode = x.EmployeeCode;
allEmp.EmployeeName = x.EmployeeName;
allEmp.Designation = x.Designation;
allEmp.DeliveryTeam = x.DeliveryTeam;
allEmp.ConfirmationDate = x.ConfirmationDate;
emp.Add(allEmp);
});
GridView gv = new GridView();
gv.DataSource = emp;
gv.DataBind();
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment; filename=InitiatedEmployees.xls");
Response.ContentType = "application/ms-excel";
Response.Charset = "";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
gv.RenderControl(htw);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
}
here i used parent class as a parameter and used linq.now its working perfectly fine.
thank you all.
You can't just write the output with a StringWriter. After your call to RenderControl, write:
byte[] byteArray = Encoding.ASCII.GetBytes(sw.ToString());
MemoryStream s = new MemoryStream(byteArray);
StreamReader sr = new StreamReader(s, Encoding.ASCII);
Response.Write(sr.ReadToEnd());
Response.End();
Try returning a ContentResult instead of writing directly to the output stream.
in my application i have bind sql data source to grid view, on click of export button i took gridviews datasource in datatable and created webControl table and write that control to xls file. but i am getting follwowing error:
Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.
My code is as follows:
HttpResponse Response = HttpContext.Current.Response;
Response.Clear();
string StudNm = Request["hidStudnm"];
Response.AddHeader("content-disposition", "attachment;filename=" + "StudentPasswordReport" + ".xls");
Response.Charset = "";
Response.ContentType = "application/vnd.xls";
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
System.Web.UI.WebControls.Table tblRept;
tblRept = CreateTable(exportDt);
tblRept.RenderControl(htmlWrite);
please tell me why this error is occurred and how can i resole this error
You could try this
DataTableToExcel(exportDt);
private void DataTableToExcel(DataTable dataTable)
{
StringWriter writer = new StringWriter();
HtmlTextWriter htmlWriter = new HtmlTextWriter(writer);
GridView gridView = new GridView();
gridView.DataSource = dataTable;
gridView.AutoGenerateColumns = true;
gridView.DataBind();
gridView.RenderControl(htmlWriter);
htmlWriter.Close();
Response.Clear();
Response.AddHeader("content-disposition", "attachment;filename=FileName.xls");
Response.Charset = "";
Response.Write(writer.ToString());
Response.End();
}