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ClosedXML convert percentage in template

I`m using closedXML to generate a simple template with 3 columns.
To create this template i`m using this code:
protected void btnTemplate_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
var tipo = "TARGET";
if (ddlTipo.SelectedValue == "RESULTADO")
{
tipo = "RESULTADO";
}
dt.Columns.AddRange(new DataColumn[3] {
new DataColumn("BU", typeof(string)),
new DataColumn("MÉTRICA", typeof(string)),
new DataColumn(tipo,typeof(string)) });
//Exporting to Excel
//Codes for the Closed XML
using (XLWorkbook wb = new XLWorkbook())
{
var worksheet = wb.Worksheets.Add(dt, "BASE");
worksheet.Cell("C1").DataType = XLDataType.Text;
//wb.SaveAs(folderPath + "DataGridViewExport.xlsx");
string myName = ("Template.xlsx");
MemoryStream stream = GetStream(wb);// The method is defined below
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition",
"attachment; filename=" + myName);
Response.ContentType = "application/vnd.ms-excel";
Response.BinaryWrite(stream.ToArray());
Response.End();
}
}
Its working fine, the problem is in the C column, it can receive percentage, and it changed the type in the excel.
Is there a way to force in closedXML that the column C is always treated as TEXT? To not convert the numbers. i tried using worksheet.Cell("C1").DataType = XLDataType.Text; to force as text,but it doesnt`t work.

Well I never used closedXML I rater EPPLUS (version 4.5.3.3 is totally free),
But I have a lot of cases like yours, what I do is set the type of the column as text,
in closed xml you can do:
worksheet.Cell(rowIndex, columnIndex).Style.NumberFormat.Format = "#";
But there's a simpler solution that works for any Excel XML library!
Instead of creating your excel template with code you can create it manually and save on a folder in your project. Setup any attribute you want to with the Excel interface itself save it, and then open the file with closed xml and just set the values wherever you want to. Last 'save as' somewhere (dont overrite the template) and do what you need.
there is a lot benefits in doing like this:
1 - A few time to create the template (compared with coding).
2 - Reduce your code.
3 - You can place formulas easier.
4 - No need to change code to modify the template.
5 - Any one who knows a bit of Excel can change the template.

ASP 4.0, C# Writing a DataSet as XML Data

I am simply trying to load a dataset and output it on a webpage as XML with the schema being written as well. I have been researching to find a way to achieve this without any luck.
The code I am using is:
string str =
"SELECT Name,Members,MaxLvl,Faction,Government,Score FROM dim5orgs where faction =
'Omni' order by Score DESC";
// Connection string for a typical local MySQL installation
string cnnString = "Server=xxxxxxxnet;Port=3306;Database=xxx;Uid=xxxxx;Pwd=xxxx";
// Create a connection object and data adapter
MySqlConnection cnx = new MySqlConnection(cnnString);
MySqlDataAdapter adapter = new MySqlDataAdapter();
// Create a SQL command object
string cmdText = str;
MySqlCommand cmd = new MySqlCommand(cmdText, cnx);
// Create a fill a Dataset
DataSet ds = new DataSet();
adapter.SelectCommand = cmd;
adapter.Fill(ds);
StringWriter sw = new StringWriter();
ds.WriteXml(sw,XmlWriteMode.WriteSchema);
string result = sw.ToString();
Response.Write(result);
Right now I am getting output like:
Punk732220OmniRepublic1644786805740
Paradise754220OmniDepartment1633903815782
I would like the output to be in proper XML form somehow using the column names in the dataset.
Like:
<data>
<name>Punk</name>
<members>732</members>
<Maxlvl>220</MaxLvl>...etc
</data>
I would like to be in proper XML form, with the XML headers written properly.
Thank you.

Look into the documentation of the XmlSerializer Class. I think you could use it something like this:
StreamWriter streamWriter = new StreamWriter(fileLocation);
XmlSerializer xml = new System.Xml.Serialization.XmlSerializer(ds.GetType());
xml.Serialize(streamWriter, ds);
streamWriter.Close();
I have not tried it with DataSets so I'm not sure.

When you say "I am getting output like", does that mean you are seeing that in your webpage, or that is what "result" contains when you debug the program?
If the former, you are probably missing setting the response type:
Response.ContentType = "text/xml";
and optionally the encoding:
Response.ContentEncoding = System.Text.Encoding.UTF8;
before you write your response.
EDIT: Also, make sure you are not returning any html from your page template or master page (assuming you are using .aspx files). You can check this by looking at your page source in your browser (right click and "view source" in IE). Apologies if this teaching you to suck eggs, from your question I didn't know if you have already checked these things or not.
Edit 2: I've tested your code, and if you set the response ContentType to text/xml it works for me.

Export data from DataTable to Excel file

I have DataTable object. How can I export it into an XLS file?
I tried to render it via DataGrid
DataGrid dgGrid = new DataGrid();
dgGrid.DataSource = dt;
dgGrid.DataBind();
dgGrid.RenderControl(hw);
but the file is very large and the OutOfMemoryException appears.
I can use http://epplus.codeplex.com/.
I need C# function.

There are a number of options, one of them being the Access OLE DB Provider which also operates in terms of DataTables.
If you want more fine-grained support over the document, I'd recommend the Open XML SDK 2.0, whixh is .xmlx only.
For raw data, I think that Access OLE DB (also reffered to as the ACE provider) is the best choice since it enables a database-like experience. Open XML assumes fairly good knowledge of XML and the willingnes to experiment a bit more. On the other hand, you can apply formatting, add formulas and other advanced features.

Ok, find a solution here: http://bytesofcode.hubpages.com/hub/Export-DataSet-and-DataTable-to-Excel-2007-in-C
Just download epplus library and call method:
private void GenerateExcel(DataTable dataToExcel, string excelSheetName)
{
string fileName = "ByteOfCode";
string currentDirectorypath = Environment.CurrentDirectory;
string finalFileNameWithPath = string.Empty;
fileName = string.Format("{0}_{1}", fileName, DateTime.Now.ToString("dd-MM-yyyy"));
finalFileNameWithPath = string.Format("{0}\\{1}.xlsx", currentDirectorypath, fileName);
//Delete existing file with same file name.
if (File.Exists(finalFileNameWithPath))
File.Delete(finalFileNameWithPath);
var newFile = new FileInfo(finalFileNameWithPath);
//Step 1 : Create object of ExcelPackage class and pass file path to constructor.
using (var package = new ExcelPackage(newFile))
{
//Step 2 : Add a new worksheet to ExcelPackage object and give a suitable name
ExcelWorksheet worksheet = package.Workbook.Worksheets.Add(excelSheetName);
//Step 3 : Start loading datatable form A1 cell of worksheet.
worksheet.Cells["A1"].LoadFromDataTable(dataToExcel, true, TableStyles.None);
//Step 4 : (Optional) Set the file properties like title, author and subject
package.Workbook.Properties.Title = #"This code is part of tutorials available at http://bytesofcode.hubpages.com";
package.Workbook.Properties.Author = "Bytes Of Code";
package.Workbook.Properties.Subject = #"Register here for more http://hubpages.com/_bytes/user/new/";
//Step 5 : Save all changes to ExcelPackage object which will create Excel 2007 file.
package.Save();
MessageBox.Show(string.Format("File name '{0}' generated successfully.", fileName)
, "File generated successfully!", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}

First of all, Google is your best friend. Also you can search on this site.
Some solutions:
You can write an excel file with SQL.
You can use the reference to Microsoft Office library to create an excel file
You can write an XML file.

reading excel file -> getting checkbox value

So i think ive tried everything now. Im trying to get the values from radiobuttons and checkboxes from an excel sheet. My first approach was to use the Excel Data Reader: http://exceldatareader.codeplex.com/. The cells with checkboxes render empty.
Same thing if i use OLEDB;
string filename = #"C:\\" + "uploads\\SmartAuditSheet.xls";
string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
"Data Source=" + filename + ";" +
"Extended Properties=Excel 8.0;";
OleDbDataAdapter dataAdapter = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", connectionString);
DataSet myDataSet = new DataSet();
dataAdapter.Fill(myDataSet, "BookInfo");
DataTable dataTable = myDataSet.Tables["BookInfo"];
gv.DataSource = myDataSet;
gv.DataBind();
Help please.

I would suggest you try something like the following.
OLEObject ole = (OLEObject)excelWorksheet.OLEObjects("Checkbox1");

I would recommend using some 3rd-party library for that - there are several out there (free and commercial) that do NOT require Excel being installed:
OpenXML 2.0 (free library from MS) can be used to read/modify the content of an .xlsx so you can do with it what you want
EPPlus (free library) works with XLSX
some (commercial) 3rd-party libraries come with grid controls allowing you to do much more with excel files (most can do not only XLSX but XLS too) in your application (be it Winforms/WPF/ASP.NET...) like SpreadsheetGear, Aspose.Cells, Flexcel etc.

bool state = Convert.ToBoolean(ws.OLEObjects("Checkbox1").Object.value());

You get the object values using OpenXML. Below Code shows how to get checkbox object values using OpenXML.
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
public static bool GetCheckBoxValue( String filePath )
{
bool isChecked = false;
using (SpreadsheetDocument document = SpreadsheetDocument.Open(filePath, false))
{
WorkbookPart wbPart = document.WorkbookPart;
// Sheet object to retrieve a reference to the first worksheet.
Sheet theSheet = wbPart.Workbook.Descendants<Sheet>().Where(s => s.Name == "Sheet1").FirstOrDefault();
var control = wsPart.Worksheet.Descendants<DocumentFormat.OpenXml.Spreadsheet.Control>().FirstOrDefault();
var controlProperies = (ControlPropertiesPart)wsPart.GetPartById(control.Id);
isChecked = controlProperies.FormControlProperties.Checked == "Checked";
}
return isChecked ;
}

Stop Date Auto-Format when Exporting from DataGrid to Excel in C#

I am currently formatting a Date for a specific Excel file Export from a DataSet/DataGrid.
The Date is formatted like so:
DateTime date = Convert.ToDateTime(entry.Date);
string formatdate = String.Format("{0:yyyy/MM/dd}", date);
Once creating the DataSet is said and done, I use the following code to Export the DataSet to an Excel file:
public static void ExportDStoExcel(DataSet ds, string filename)
{
HttpResponse response = HttpContext.Current.Response;
response.Clear();
response.Charset = "";
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("Content-Disposition", "attachment;filename=\"" + filename + "\"");
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
DataGrid dg = new DataGrid();
dg.DataSource = ds.Tables[0];
dg.DataBind();
dg.RenderControl(htw);
response.Write(sw.ToString());
response.End();
}
}
}
My only problem is once I export this to Excel, Excel Auto-Formats the Dates like this: MM/DD/YYYY instead of YYYY/MM/DD.
I understand this could be achieved manually by opening in Excel, but the Export is being built into an Automated System and needs to be hard coded.
Is there any way of bypassing Excel's DateTime Auto-Formatting?

I had the same issue and solved it by adding a non breaking space (&nbsp) in front of the text. Stopped Excel from auto-formatting. Not the cleanest solution but did the trick for me...

Right now you are just outputting HTML table, that Excel interprets how it likes. You'd have bring yourself down to Excel's level to be able to specify column's properties (set type to Text instead of General).
This means that you need to generate actual xls file (there are various libraries out there for that). Or (if restriction to Office 2010 is acceptable) got with Open XML format which you can write with regular .NET API.

You can style excel cells with mso-number-format
mso-number-format:"\\#"
\# will tell excel to treat all data in text format only. So auto format won't happen.
Please update your code like this:
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("Content-Disposition", "attachment;filename=\"" + filename + "\"");
response.Write("<html xmlns:x=\"urn:schemas-microsoft-com:office:excel\">");
response.Write("<head><style> td {mso-number-format:\\#;} </style></head><body>");
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
DataGrid dg = new DataGrid();
dg.DataSource = ds.Tables[0];
dg.DataBind();
dg.RenderControl(htw);
response.Write(sw.ToString());
response.Write("</body></html>");
response.End();
}
}
OR
you can try with specific date format also.
Refer: http://cosicimiento.blogspot.in/2008/11/styling-excel-cells-with-mso-number.html
mso-number-format:"yyyy\/mm\/dd"