Develop Reference

C#, ClosedXML. Taking cell addresses from an Excel sheet, and taking data from a data table, and use this addresses and datas to fill a template file

Addresses Excel
I have an issue with my c# code with ClosedXML, which takes cell addresses from another excel file, takes data from another excel table, and writes data to an excel file which is a template but while taking the addresses, it's sorting them, if the data table has a certain value, it's should write the value to a certain address. For example, if the C5 cell in the data table has "SPHERE", it's gonna write to value to K1 cell, if the C5 cell in the data table has "BODY", it's gonna write to value to K5 cell, if the C5 cell in the data table is empty, it's not gonna use that parameter and directly write the value to G3, this example can be multiplied by different parameters.
But the problem is when it takes data from a cell first, it fills the defined cell in the if and saves the file, when it comes to a second file, it fills the first cell with the value before, then fills the second cell. It iterates like this until the parameter has different value.
public void Read(string path, string directory, bool savewithdatetime)
{
// Open workbook and get worksheet at index 1
XLWorkbook excelBook = new XLWorkbook(path);
IXLWorksheet excelWorkSheet = excelBook.Worksheet(1);
excelWorkSheet.Row(1).Delete();
// Get number of rows with data
int excelRowCount = excelWorkSheet.RowsUsed().Count();
// Open data source and get the worksheet at index 1
XLWorkbook dataSource = new XLWorkbook(Application.StartupPath + "/dataSource.xlsx");
IXLWorksheet dataSourceWS = dataSource.Worksheet(1);
List<string> ifList = new List<string>();
List<string> parameterList = new List<string>();
List<string> fromList = new List<string>();
List<string> toList = new List<string>();
for (int i = 1; i <= dataSourceWS.RowsUsed().Count(); i++)
{
ifList.Add(dataSourceWS.Cell("A" + i).Value.ToString());
parameterList.Add(dataSourceWS.Cell("D" + i).Value.ToString());
fromList.Add(dataSourceWS.Cell("B" + i).Value.ToString());
toList.Add(dataSourceWS.Cell("C" + i).Value.ToString());
}
string time = TimeStamp(savewithdatetime);
// Iterate over each row in the excelWorkSheet
for (int row = 1; row <= excelRowCount; row++)
{
// Reset templateWS to the original template
templateWS = template.Worksheet(1);
// Iterate through the data source rows
for (int i = 0; i < fromList.Count; i++)
{
// Check if the cell at the given address in excelWorkSheet is empty
if (string.IsNullOrEmpty(excelWorkSheet.Cell(ifList[i]).Value.ToString()))
{
// If empty, skip to the next iteration
continue;
}
// Check if the value of the cell at the given address in excelWorkSheet matches the value of the cell at the corresponding address in parameterList
else if (parameterList[i] == excelWorkSheet.Cell(ifList[i]).Value.ToString())
{
// If the values match, set the value of the cell at the corresponding address in toList to the value of the cell at the corresponding address in fromList
templateWS.Cell(toList[i]).Value = excelWorkSheet.Cell(fromList[i]).Value;
}
}
// Save template workbook as new file with incremented index in the specified directory
template.SaveAs(directory + "/Test results" + time + "/Test result-[" + (row) + "].xlsx");
if (row == excelRowCount)
{
break;
}
// Delete the first row of the excelWorkSheet so that the next iteration will use the next row of data
excelWorkSheet.Row(1).Delete();
}
// Clear the lists and collect garbage to free up memory
ifList.Clear();
fromList.Clear();
parameterList.Clear();
toList.Clear();
GC.Collect();
}

EPPLUS ExcelRange creates table starting in wrong row

In C# I have populated an excel file with data. Now I would like to create a table starting at cell A2.
I am using the code below to create the table but instead of creating the table starting at Cell A2, the table is being created starting at cell A3
using var package = new ExcelPackage(file);
var ws = package.Workbook.Worksheets.Add(Name: "MainReport");
var range = ws.Cells[Address: "A2"].LoadFromCollection(people, PrintHeaders: true);
range.AutoFitColumns();
//Formats Header row
ws.Cells[Address: "A1"].Value = "My Data!";
ws.Cells[Address: "A1:C1"].Merge = true;
ws.Column(col: 1).Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
ws.Row(row: 1).Style.Font.Size = 24;
ws.Row(row: 1).Style.Font.Color.SetColor(Color.Pink);
ws.Row(row: 2).Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
ws.Row(row: 2).Style.Font.Bold = true;
ws.Column(col: 3).Width = 20;
//create a range for the table
ExcelRange range_table = ws.Cells[2, 1, ws.Dimension.End.Row, ws.Dimension.End.Column];
//add a table to the range
ExcelTable tab = ws.Tables.Add(range_table, "Table1");
//format the table
tab.TableStyle = TableStyles.Medium2;

Excel itself works so that if you select A2:C4 and create a table and you say "has no Headers" it will put some generic headers in A2:C2 and shift the data area (and the data if there is any) to A2:C5.
If you say "has Headers" the headers will be defined in A2:C2, too, but the data only is in A3:C4.
The real Excel obviously does some guessing whether headers are present or not and pre-ticks the box for you.
As stated here in the API Documentation, there is no flag to define if headers are present in the range so there might be no guessing and it might be assumed it is "no" and the shifting as explained on top takes place.
If you take that into consideration you should be able to work it out.

Remove cells from word table with Novacode DocX

How do I remove a single cell from a word table using Novacode DocX?
I have tried:
table.Rows[0].Cells.RemoveAt(2);
and
Cell c = table.Rows[0].Cells[2];
table.Rows[0].Cells.Remove(c);
and
table.Rows[0].Cells.RemoveRange(2,4);
None of them remove any cells.

I have been working with Novacode DocX very recently. Something I have realized is that a lot of the methods classes have are inherited and are not overridden. An example is cell inherits Remove() from container and is never overridden to do what you would expect it to do.
sorcecode for Novacode.Table
What you can do to try and get around this is to hide the cell/cells, since I am assuming you are not removing an entire row or column.
Novacode.Table table = document.Tables[0]
Novacode.Row row = table.Rows[0]; //int of row that contains cell/cells to remove
int first_cell = 0; //beginning cell of range
int last_cell = 1; //last cell of range
for(int i = first_cell; i < last_cell + 1; i++)
{
foreach (var paragraph in row.Cells[i].Paragraphs)
{
paragraph.Remove(false);
}
}
row.MergeCells(first_cell, last_cell);
Novacode.Cell cell = row.Cells[first_cell];
Novacode.Border border = new Border();
border.Tcbs = Novacode.BorderStyle.Tcbs_none;
cell.SetBorder(Novacode.TableCellBorderType.Right, border);
cell.SetBorder(Novacode.TableCellBorderType.Left, border);
cell.SetBorder(Novacode.TableCellBorderType.Top, border);
cell.SetBorder(Novacode.TableCellBorderType.Bottom, border);
This code would remove text and merge the first two cells of your first table and make there borders invisible. So this would turn the area you want deleted into one invisible blank cell, assuming you are using Paragraphs of text in the Cell.

You may have to save the table back to the document.
Try
appending the table to the end of the document. if that's missing the cells
Remove and replace the table in the document.

You have to clear the child XML from the Cell Element yourself, as it is not correctly handled by the NovaCode DocX Api:
table.Rows.Last().Cells.Last().Xml.RemoveAll();
table.Rows.Last().Cells.Last().InsertParagraph();
Note that the InsertParagraph in the end is necessary as Cells cannot be empty.

In the Table class you can use the methods
MergeCells(int, int)
and
MergeCellsInColumn(int, int, int)
to 'remove' cells.
See: https://docx.codeplex.com/SourceControl/latest#DocX/Table.cs

Add Columns to Existing Excel 2007 workbook using Open Xml

I have a predefined Excel workbook with all sheets in place and I need to write content to it. I succesfully write to cells.
The problem is in a particular worksheet that i need to add three columns to it. In the code bellow, first i'm grabbing the Worksheet and then i proceed to add columns. This code runs fine, i mean, no exception is thrown, but then I get an error when I try to open the Excel file, stating that there are some content that cannot be read and all the content of this particular worksheet is cleared.
I know that the problem is with this operation because if I comment out those lines that add columns, the workbook opens just fine with all the cells values I write from code in place.
This is the relevant code, for testing purpose I'm trying to add 3 columns:
using (SpreadsheetDocument document = SpreadsheetDocument.Open(outputPath, true)){
Sheet sheet2 = document.WorkbookPart.Workbook.Descendants<Sheet>().Single( s => s.Name == "Miscellaneous Credit" );
Worksheet workSheet2 = ( (WorksheetPart)document.WorkbookPart.GetPartById( sheet2.Id ) ).Worksheet;
Columns cs = new Columns();
for ( var y = 1; y <= 3; y++ ) {
Column c = new Column()
{
Min = (UInt32Value)1U,
Max = (UInt32Value)1U,
Width = 44.33203125D,
CustomWidth = true
};
cs.Append( c );
}
workSheet2.Append( cs );
}
EDIT : As per Chris's explanation about columns's concept
using (SpreadsheetDocument document = SpreadsheetDocument.Open(outputPath, true)){
Sheet sheet2 = document.WorkbookPart.Workbook.Descendants<Sheet>().Single( s => s.Name == "Miscellaneous Credit" );
Worksheet workSheet2 = ( (WorksheetPart)document.WorkbookPart.GetPartById( sheet2.Id ) ).Worksheet;
// Check if the column collection exists
Columns cs = workSheet2.Elements<Columns>().FirstOrDefault();
if ( ( cs == null ) ) {
// If Columns appended to worksheet after sheetdata Excel will throw an error.
SheetData sd = workSheet2.Elements<SheetData>().FirstOrDefault();
if ( ( sd != null ) ) {
cs = workSheet2.InsertBefore( new Columns(), sd );
}
else {
cs = new Columns();
workSheet2.Append( cs );
}
}
//create a column object to define the width of columns 1 to 3
Column c = new Column
{
Min = (UInt32Value)1U,
Max = (UInt32Value)3U,
Width = 44.33203125,
CustomWidth = true
};
cs.Append( c );
}

This first part of answer deals about how to set columns width (based on the initial sample code, I was thinking that you wanted only define the width of the columns).
First, it seems you misunderstood what are Min and Max properties of the Column object. They represent respectively First and Last column affected by this 'column info' record. So if you have a set of contiguous columns with the same width, you can set that width using one Column class. In your snippet you define 3 times the width of the same column (Index 1).
Then, you presume Columns collection doesn't exist yet...
And finally, the main point is that if the Columns collection is appended after SheetData, Excel will throw error.
Final code that work for me (Open XML SDK 2.0)
using (SpreadsheetDocument document = SpreadsheetDocument.Open(outputPath, true)) {
Sheet sheet2 = document.WorkbookPart.Workbook.Descendants<Sheet>().Single(s => s.Name == "Your sheet name");
Worksheet workSheet2 = ((WorksheetPart)document.WorkbookPart.GetPartById(sheet2.Id)).Worksheet;
// Check if the column collection exists
Columns cs = workSheet2.Elements<Columns>().FirstOrDefault();
if ((cs == null)) {
// If Columns appended to worksheet after sheetdata Excel will throw an error.
SheetData sd = workSheet2.Elements<SheetData>().FirstOrDefault();
if ((sd != null)) {
cs = workSheet2.InsertBefore(new Columns(), sd);
} else {
cs = new Columns();
workSheet2.Append(cs);
}
}
//create a column object to define the width of columns 1 to 3
Column c = new Column {
Min = (UInt32Value)1U,
Max = (UInt32Value)3U,
Width = 44.33203125,
CustomWidth = true
};
cs.Append(c);
}
I'm still confused on how to perform column insert. Says I have
columns A, B and C, I want to insert three columns between B and C,
ending up with columns A,B,C,D,E,F. How can i achieve it?
The Columns object in OpenXml SDK is here to store styles and width informations for the columns. Inserting a Column in the collection won't "insert" a column in the sheet.
"Inserting" a column like you mean is a very large and complex task with OpenXmlSDK.
From my understanding of the problem, it means you will have to find all cells and shift them by changing their reference (ex. a cell with ref "B1" would become "F1" after inserting 3 columns, etc ...). And it means you will have to change a lot of other things (reference of cell in formulas for example).
This kind of task could be easily done with Office.Interop or probably with libraries like EEPlus or ClosedXml.

How do I access a cell in Excel Interop when using filtered ranges?

I originally had a code segment that iterated through rows of an Excel spreadsheet using the UsedRange as such:
range = ws.UsedRange;
for (int row = 3; row <= range.Rows.Count; row++)
{
Object nObj = ((Excel.Range)ws.Cells[row, "N"]).Text;
}
But I needed to only get the rows that remained after I applied a filter so (after viewing How can I get the Range of filtered rows using Excel Interop?) I changed the code as such:
range = ws.UsedRange.SpecialCells(Excel.XlCellType.xlCellTypeVisible, Type.Missing);
foreach (Excel.Range area in range.Areas)
{
foreach (Excel.Range row in area.Rows)
//for (int row = 3; row <= range.Rows.Count; row++)
{
Object nObj = ((Excel.Range)ws.Cells[row, "N"]).Text;
}
}
Except now I'm getting type mismatch errors. What fundamental thing am I missing here?

I believe you are getting a type mismatch at the call to ws.Cells[row, "N"]. In the original code, row is an int. In the modified code, row is an Excel.Range.
Given that, in the modified code, row is a single row (multiple column) range, all you should need to do is index into the cell in that row which corresponds to column N. Assuming your range starts in column A, this will be the cell in 14th column.
E.g.
Object nObj = ((Excel.Range)row.Cells[1, 14]).Text;