I'm writing an application that's supposed to export data from a map application.
This application is using Silverlight, and to facilitate export to Excel I am using this library.
All of the data is represented in strings by default. When I write to the spreadsheet, I try to parse each string to see which type it is:
string str = kvp.Value;
int i = 0;
long l = 0;
decimal dec = 0;
DateTime dt;
if (int.TryParse(str, out i))
doc.Workbook.Sheets[0].Sheet.Rows[r].Cells[c].SetValue(i);
else if (decimal.TryParse(str, out dec))
doc.Workbook.Sheets[0].Sheet.Rows[r].Cells[c].SetValue(dec);
else if (long.TryParse(str, out l))
doc.Workbook.Sheets[0].Sheet.Rows[r].Cells[c].SetValue(l);
else if (DateTime.TryParse(str, out dt))
doc.Workbook.Sheets[0].Sheet.Rows[r].Cells[c].SetValue(dt);
else
doc.Workbook.Sheets[0].Sheet.Rows[r].Cells[c].SetValue(str);
This works great, except for DateTime and when I try to parse a social security number, which in my case is 12 characters long.
The social security number is parsed as a decimal number, and is displayed in scientific form in Excel. From what I've gathered through reading it seems like a limitation in Excel. If I mark the cell however, I see the correct number in the top bar where you can write formulas. I've solved this problem so far by simply putting this number as a string and letting the end user handle it for now, but I'd really like for it to be a number in the finished document. Is this possible?
What really boggles my mind though, is the DateTime. The format of the date comes like this from the application: 10/15/2013 1:10:00 AM.
It looks like this in the Excel file: 2455075.
I checked the source code for the date formatting but I don't seem to be adept enough to see if there is anything wrong in it. For anyone intresed, you can check it out here.
The SetValue-function is supposed to identify the following types automatically:
bool
DateTime
decimal
Exception
SharedStringDefinition
string
I apologize for the long post. It boils down to these questions:
Can I make Excel handle long numbers without scientific notation programatically?
Why is the DateTime being outputed to such a weird format?
To be set Cell Value in Date format you have to convert DateTime to OLE Automation Date. Also you can create more clear method for writing cell values. Somthing like this:
public bool UpdateValue(WorkbookPart wbPart, string sheetName, string addressName, string value,
UInt32Value styleIndex, CellValues dataType)
{
// Assume failure.
bool updated = false;
Sheet sheet = wbPart.Workbook.Descendants<Sheet>().Where(
(s) => s.Name == sheetName).FirstOrDefault();
if (sheet != null)
{
Worksheet ws = ((WorksheetPart)(wbPart.GetPartById(sheet.Id))).Worksheet;
Cell cell = InsertCellInWorksheet(ws, addressName);
if (dataType == CellValues.SharedString)
{
// Either retrieve the index of an existing string,
// or insert the string into the shared string table
// and get the index of the new item.
int stringIndex = InsertSharedStringItem(wbPart, value);
cell.CellValue = new CellValue(stringIndex.ToString());
}
else
{
cell.CellValue = new CellValue(value);
}
cell.DataType = new EnumValue<CellValues>(dataType);
if (styleIndex > 0)
cell.StyleIndex = styleIndex;
// Save the worksheet.
ws.Save();
updated = true;
}
return updated;
}
Then call this method like this (first call is for String second is for DateTime):
UpdateValue(workbookPart, wsName, "D14", "Some text", 0, CellValues.String);
UpdateValue(workbookPart, wsName, "H13", DateTime.Parse("2013-11-01").ToOADate().ToString(CultureInfo.InvariantCulture), 0, CellValues.Date);
Related
I have a very simple test App with an Infragistics UltraGrid which I have populated with some currency values.
UltraDataSource dataSource = new UltraDataSource();
dataSource.Band.Columns.Add("Cost1", typeof(double));
dataSource.Band.Columns.Add("Cost2", typeof(double));
dataSource.Band.Columns.Add("Cost3", typeof(double));
var dataRow = dataSource.Rows.Add();
dataRow["Cost1"] = 10.50;
dataRow["Cost2"] = 12.30;
dataRow["Cost3"] = 14.96;
gridResults.DataSource = dataSource;
gridResults.DataBind();
gridResults.DisplayLayout.Bands[0].Columns[1].Format = "C";
gridResults.DisplayLayout.Bands[0].Columns[2].Format = "C";
gridResults.DisplayLayout.Bands[0].Columns[3].Format = "C";
I actually want o use a custom format string of '$0.00' as my currency may be different in different columns but for simplicity I have stayed with the generic C format string. I then export the Grid to MS Excel using the UltraGridExcelExporter object as follows.
UltraGridExcelExporter exporter = new UltraGridExcelExporter();
exporter.ExportFormulas = true;
exporter.Export(gridResults, filename);
The display on screen is as I expect with the currency symbol and the value formatted correctly however when I look at the Excel file generated, the values are displayed as standard numeric with no formatting carried over. I have checked the docs and the default is to export formatting but at the moment I am at a loss as to what I am doing wrong.
What you can do is handle UltraGridExcelExporter InitializeColumn event. In this event you have access to excel format string of the column as well as to the grid column format string. Check in the event if the column has a format string and set the excel format string like this:
private void UltraGridExcelExporterInitializeColumn(object sender, InitializeColumnEventArgs e)
{
if (!string.IsNullOrEmpty(e.Column.Format))
{
switch (e.FrameworkFormatStr)
{
case "C":
e.ExcelFormatStr = "$#,##0.00";
break;
// handle here other format strings you may have
default:
e.ExcelFormatStr = e.FrameworkFormatStr;
break;
}
}
}
Note that not all the format strings in C# are the same as the format strings in Excel.
I have an excel document which I try to import to my system.
(.net core 2.2 and EPPlus v4.5.3.1)
The excel data like 09:57:32 and Custom Cell format [hh]:mm:ss
private TimeSpan? GetRequiredTimeFromRowOrNull(ExcelWorksheet worksheet, int row, int column, string columnName, StringBuilder exceptionMessage)
{
worksheet.Cells[row, column].Style.Numberformat.Format = "hh:mm:ss";
var cellValue = TimeSpan.Parse(worksheet.Cells[row, column].Value.ToString());
if (cellValue.ToString() != null && !string.IsNullOrWhiteSpace(cellValue.ToString()))
{
return cellValue;
}
exceptionMessage.Append(GetLocalizedExceptionMessagePart(columnName));
return null;
}
"worksheet.Cells[row, column].Value"
comes 0.414953703703704
and also
"worksheet.Cells[row, column].Text" comes 09:12:32
How can I get exact value?
Excel stores dates and time in decimal values. The whole-number part is the day and the decimal part is the time.
So, to get into a C# DateTime, use the OLE Automation converter:
try
{
var val = (double)worksheet.Cells[row, column].Value;
var dt = DateTime.FromOADate(val);
var cellValue = dt.TimeOfDay;
}
catch (Exception)
{
//log conversion error
}
Will want to put a Try.Catch around the cast JIC the cell does not have a number in it.
Is it possible to get Excel cell value with its format(Number, date or general) with C#? I am using EPPLUS library right now but it does not have this option.
What I did is basically try to cast cell value to certain type. EPPLUS handles conversion for you. If conversion succeeded, value was properly formatted for a specified type. I do not know if there is better way, but i used this in my code:
var file= new FileInfo(path);
using (var package = new ExcelPackage(file))
{
var sheet = package.Workbook.Worksheets["Sheet1"];
var cell = sheet.Cells["A1"];
if(cell.Value is DateTime)
{
//logic for datetime
}
else if(cell.Value is double)
{
//you get the point :)
}
}
I'm trying to create an Excel spreadsheet in my web application using a tab-delimited text file as the data source. The code that loads my data looks like this:
// Load the data into the cells
Int32 rowIdx = 1;
foreach (String line in tab.Lines)
{
String[] cellTexts = line.Split(TAB);
Int32 colIdx = 1;
foreach (String cellText in cellTexts)
{
sheet.Cells[rowIdx, colIdx].Value = cellText;
colIdx++;
}
rowIdx++;
}
That seems to work fine. Later, however, I add a NumberFormat of "mm/dd/yyyy" to the cells:
range.Style.Numberformat.Format = "mm/dd/yyyy";
However, this doesn't change the display of the data in the cells. (The dates look like 5/1/15 or 12/31/15 in the original text file, and remain that way after the format is applied.
I am pretty sure that this because I've put a text value into the cell. (While it looks like a date, it's still just a string of characters.) But from my reading, I need to put a double into the cell to meet Excel's expectation that dates are stored as a double. Because the cell contains a string and not a double, the format string isn't applied, leaving the original, unformatted text.
I want to add some code to
Check the type of data in each cell in the range to which I apply a
date format.
If it's not a double, attempt to convert it to a date.
If the date conversion is successful, then convert the .NET date to an OADate and put it back into the cell.
My question is: Is this the best (or at least a reasonable) approach, and if so, how do I do that?
This code doesn't work:
foreach (OfficeOpenXml.ExcelRangeBase oneCell in range)
{
if (typeof(oneCell.Value) == "System.String")
{
// date manipulations here
}
}
The red line appears under oneCell in the typeof(oneCell.Value) call with the message "The type or namespace 'oneCell' could not be found. (Are you missing a using directive or an assembly reference?)"
Note that I can't know in advance where the date fields will be because both the data and the cell formats are provided from an external source. (The external cell formats do indicate when the format being applied is for a date format as opposed to a regular number format or a string.)
As #mason suggested, I'm posting the code I used to get around this problem.
(I didn't get an answer to my original question, which is how to iterate cells in a range and check the data type of each cell's content, but with this solution, I no longer need to do that.)
Instead, I modified the loop that loads the data from the tab-delimited text file to use some TryParse() calls to detect dates, numbers, or regular text data, and then load the appropriately typed data into the cell. Note how it checks for a leading single quote character to suppress the data typing if the cell is actually text, but looks like a number or a date:
// Load the data into the cells
Int32 rowIdx = 1;
foreach (String line in tab.Lines)
{
String[] cellTexts = line.Split(TAB);
Int32 colIdx = 1;
foreach (String cellText in cellTexts)
{
DateTime dateValue;
Double doubleValue;
if(cellText.StartsWith("'"))
{
sheet.Cells[rowIdx, colIdx].Value = cellText.Substring(1);
}
else if(DateTime.TryParse(cellText,out dateValue))
{
sheet.Cells[rowIdx, colIdx].Value = dateValue;
}
else if (Double.TryParse(cellText, out doubleValue))
{
sheet.Cells[rowIdx, colIdx].Value = doubleValue;
}
else
{
sheet.Cells[rowIdx, colIdx].Value = cellText;
}
colIdx++;
}
rowIdx++;
}
With the data typed appropriately in the cells, the formats have the desired effect.
I'm storing mix of numeric and non-numeric values in a single column in spreadsheet using C# and EPPlus. When I open spreadsheet with Excel it shows green triangles in the cells with numeric values giving warning that 'Number Stored as Text' and giving option to ignore it for particular cell. Can I do it from code or is it some Excel specific feature?
You really have 2 options using code:
change the .NumberFormat property of Range to TEXT (I believe equivalent in epplus is Cell[row, column].Style.NumberFormat.Format)
prefix any number with ' (a single quote) - Excel then treats the number as TEXT - visually, it displays the number as is but the formula will show the single quote.
Alternatively, which I wouldn't recommend relying on
play with Excel's properties and untick the option to display warnings
From the EPPlus documentation:
My number formats does not work
If you add numeric data as strings (like the original ExcelPackage does), Excel will treat the data as a string and it will not be formatted. Do not use the ToString method when setting numeric values.
string s="1000"
int i=1000;
worksheet.Cells["A1"].Value=s; //Will not be formatted
worksheet.Cells["A2"].Value=i; //Will be formatted
worksheet.Cells["A1:A2"].Style.Numberformat.Format="#,##0";
http://epplus.codeplex.com/wikipage?title=FAQ&referringTitle=Documentation
This is a derivation of TechnoPriest's answer that works for me - I've added handling of decimal values, and changed the name of the method to more accurately document its true raison d'etre:
public static void ConvertValueToAppropriateTypeAndAssign(this ExcelRangeBase range, object value)
{
string strVal = value.ToString();
if (!String.IsNullOrEmpty(strVal))
{
decimal decVal;
double dVal;
int iVal;
if (decimal.TryParse(strVal, out decVal))
{
range.Value = decVal;
}
else if (double.TryParse(strVal, out dVal))
{
range.Value = dVal;
}
else if (Int32.TryParse(strVal, out iVal))
{
range.Value = iVal;
}
else
{
range.Value = strVal;
}
}
else
{
range.Value = null;
}
}
You can check if your value is integer, convert it to int and assign number to cell's value. Then it will be saved as number, not string.
public static void SetValueIntOrStr(this ExcelRangeBase range, object value)
{
string strVal = value.ToString();
if (!String.IsNullOrEmpty(strVal))
{
double dVal;
int iVal;
if (double.TryParse(strVal, out dVal))
range.Value = dVal;
else if (Int32.TryParse(strVal, out iVal))
range.Value = iVal;
else
range.Value = strVal;
}
else
range.Value = null;
}