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How to get actual columns range Spreadsheetgear

I have an Excel worksheet which has 50 Rows and 38 columns "Filled" with actual data but when I try to get the .UsedRange I am getting More than 1025 Rows and 250 columns as Used range! Please let me know how can I get only actual Used ranges with filled data and retrive the actual range data using Spreadsheetgear lib? I tried something like, but when user added some column, it's does not work.
var workbook = Factory.GetWorkbook(filePath);
var worksheet = workbook.Worksheets[0];
var cells = worksheet.UsedRange;
var headerCount = 0;
// get columns size
for (var columnCount = 0; columnCount <= range.ColumnCount; ++columnCount)
{
if (columnCount > headers.Length && string.IsNullOrEmpty(range[HeaderRow, columnCount].Text))
{
headerCount = columnCount - 1;
break;
}
}

SpreadsheetGear (and Excel itself) will include cells into the UsedRange that are empty but have formatting of some kind. For instance, if cell ABC123 has a custom NumberFormat, Font color or similar, the UsedRange will include that cell, thereby potentially blowing up your UsedRange A1:ABC123 even if the actual "value-populated" or "filled" portion of the worksheet is much smaller.
If this is a problem and you need to only include the portion of a sheet that is actually populated with cell values, below is one possible routine you might be able to use to only include cells that have cell values of some kind. It is written as an extension method off of IWorksheet to make utilization of it easier, and includes a bool flag that you can pass in so as to return either the "normal" UsedRange (including cells with other types of formatting) or the "altered" UsedRange discussed here:
public static class SGExtensionMethods
{
public static IRange GetUsedRange(this IWorksheet worksheet, bool ignoreEmptyCells)
{
IRange usedRange = worksheet.UsedRange;
if (!ignoreEmptyCells)
return usedRange;
// Find last row in used range with a cell containing data.
IRange foundCell = usedRange.Find("*", usedRange[0, 0], FindLookIn.Formulas,
LookAt.Part, SearchOrder.ByRows, SearchDirection.Previous, false);
int lastRow = foundCell?.Row ?? 0;
// Find last column in used range with a cell containing data.
foundCell = usedRange.Find("*", usedRange[0, 0], FindLookIn.Formulas,
LookAt.Part, SearchOrder.ByColumns, SearchDirection.Previous, false);
int lastCol = foundCell?.Column ?? 0;
// Return a new used range that clips of any empty rows/cols.
return worksheet.Cells[worksheet.UsedRange.Row, worksheet.UsedRange.Column, lastRow, lastCol];
}
}
A couple additional notes about this approach. It does generally take into account hidden rows or columns--meaning hidden rows or columns that have cell values will be included in the UsedRange. One exception / edge-case to this inclusion of hidden rows or columns is if AutoFilters is enabled on the worksheet. This puts the worksheet in a special "mode" that excludes hidden rows from search results. So if AutoFilters is enabled (in such cases IWorksheet.AutoFilterMode will be true), you may not be able to rely on this approach if the last row(s) or column(s) of the AutoFiltered range could possibly have been filtered out.

ExcelWorksheet.UsedRange is counting wrong if file has empty rows on top

I have c# windows application that is reading files content. I wanted to extract values from used rows only.
I am using this code:
int rows = ExcelWorksheet.UsedRange.Rows.Count;
Everything works fine. Except when I have empty rows on top, the counting will be incorrect.
-File has no special characters, formula or such. Just plain text on it.
-The application can read excel xls and xlsx with no issue if the file has no empty rows on top.

Okay, now I've realized I'm doing it all wrong. Of course it will not read all of my UsedRange.Rows because in my for loop, I am starting the reading always on the first row. So I get the ((Microsoft.Office.Interop.Excel.Range)(ExcelWorksheet.UsedRange)).Row; as a starting point of reading
This code works:
int rows = ExcelWorksheet.UsedRange.Rows.Count;
int fRowIndex = ((Microsoft.Office.Interop.Excel.Range)(ExcelWorksheet.UsedRange)).Row;
int rowCycle = 1;
for (int rowcounter = fRowIndex; rowCycle <= rows; rowcounter++)
{
//code for reading
}

Instead of read Excel row-by-row, better to get it in C# as a Range, and then handle it as
Sheet.UsedRange.get_Value()
for whole UsedRange in Sheet. Whenever you'd like to get a part of UsedRange, do it as
Excel.Range cell1 = Sheet.Cells[r0, c0];
Excel.Range cell2 = Sheet.Cells[r1, c1];
Excel.Range rng = Sheet.Range[cell1, cell2];
var v = rng.get_Value();
You well know size of v in C# memory from the values of [r1-r0, c1-c0]

C# Reorder columns of Excel worksheet

I have an Excel worksheet with some data. I also have a List of the column headers of the worksheet. The headers in the list are in a different order than the headers in the worksheet, and I need to reorder the Excel worksheet's columns to be the same order as the list.
List<string> dataset1Variables = new List<string>() { "Variable1", "Variable2", "Variable3", "Variable4" };
The headers of my Excel sheet may look like this:
Variable 3 | Variable 1 | Variable 4 | Variable 2
I have come across this code to shift columns but this is only for moving 1 column to a specific location. The list might be completely mixed up so I would need to shift many columns.
Excel.Range copyRange = xlWs.Range["C:C"];
Excel.Range insertRange = xlWs.Range["A:A"];
insertRange.Insert(Excel.XlInsertShiftDirection.xlShiftToRight,
copyRange.Cut());
What would be the best approach for doing this? Preferably using Interop.

If you have an empty row right above your worksheet with data, you can add matching formula right above headers. In below assuming your list is on Sheet2 range B2:B5 and your data headers start on Sheet1 range A2:D2
Excel.Workbook myBook = xlApp.Workbooks.Open(#"path\excel.xlsx");
Excel.Worksheet ws = myBook.Worksheets[1];
// You can use all dynamic ranges instead
// Excel.Range xlRng = ws.Range[ws.Cells[yourRow, firsColumn], ws.Cells[yourRow, lastColumn]];
Excel.Range xlRng = ws.Range[ws.Cells[1, 1], ws.Cells[1, 4]]; // ws.Range["A1:D1"];
xlRng.FormulaR1C1 = "=MATCH(R[-1]C,Sheet2!R2C2:$R5C2,0)";
// Below is how you can get full address for your list if it's in different workbook and replace Sheet2!R2C2:$R5C2 with rangeFullAddress
// string rangeFullAddress = xlRng.Address[true,true,Excel.XlReferenceStyle.xlR1C1,true];
xlRng.Calculate();
xlRng.Value = xlRng.Value;
After this you can just sort your data using Excel Sort by 1st row. After sorting your 1st row it would look like this: 1, 2, 3, 4. Then clear data on 1st row ws.Range["A1:D1"].Clear();.
Your sort key would be Key1: ws.Range["A1:D1"], here is c# sort example using c# to sort a column in excel only change Excel.XlSortOrientation and adjust for your range.
There are other ways to sort but this way you'll keep individual formats, comments of each cell within your data
I missed 1 important detail - that your list is not in Excel sheet, but you can add it to Excel, perhaps in temporary workbook or right on the same sheet:
object [,] columnHeaders = new object[3,0]; // or object[0,3]; if you'd like to add into 1 row
columnHeaders[0, 0] = "Variable1";
columnHeaders[1, 0] = "Variable2";
columnHeaders[2, 0] = "Variable3";
columnHeaders[3, 0] = "Variable4";
xlRng.FormulaR1C1 = columnHeaders; // xlRng would be in the above Sheet2!R2C2:$R5C2

How do you select a rectangular region of cells in a Word Table

Given something like
Table table;
Cell cell_1 = table.Cell(2,2);
Cell cell_2 = table.Cell(4,4);
I want to select (or highlight) from cell_1 to cell_2 (like how you would if you were doing it by hand).
I originally thought that doing the following would work:
Selection.MoveRight(wdUnits.wdCell, numCells, WdMovementType.wdExtend)
But according to http://msdn.microsoft.com/en-us/library/microsoft.office.interop.word.selection.moveright%28v=office.11%29.aspx under remarks, using wdCells as the Unit will default the WdMovementType to wdMove, and I can't think of a workaround.

Here is a workaround I've found to the problem. It isn't the most efficient way, and it doesn't work if the table has merged cells in it. I've discovered that you can select the range of your start cell, and then expand the end point of the range by moving by in units of cells. By discovering the number of cells between the start and end point of the region you want selected, you can iterate those number of cell steps. Here's the general code for that below:
word.Table table;
word.Cell cellTopLeft; //some cell on table.
word.Cell cellBottomRight; //another cell on table. MUST BE BELOW AND/OR TO THE RIGHT OF cellTopLeft
int cellTopLeftPosition = (cellTopLeft.RowIndex - 1) * table.Columns.Count + cellTopLeft.ColumnIndex;
int cellBottomRightPosition = (cellBottomRight.RowIndex - 1) * table.Columns.Count + cellBottomRight.ColumnIndex;
int stepsToTake = cellBottomRightPosition - cellTopLeftPosition;
if (stepsToTake > 0 &&
cellTopLeft.RowIndex <= cellBottomRight.RowIndex && //enforces bottom right cell is actually below of top left cell
cellTopLeft.ColumnIndex <= cellBottomRight.ColumnIndex) //enforces bottom right cell is actually to the right of top left cell
{
word.Range range = cellTopLeft.Range;
range.MoveEnd(word.WdUnits.wdCell, stepsToTake);
range.Select();
}

A much simpler way to do this is to use the Document.Range method to create a range between the two corners of the rectangle. This works equally well with merged cells.
word.Document document;
word.Cell cellTopLeft;
word.Cell cellBottomRight;
document.Range(cellTopLeft.Range.Start, cellBottomRight.Range.End).Select
Note: One can use the range returned by this expression to manipulate the contents of the table without selecting it, but it doesn't work for merging the cells (in the latter case, use cell.Merge(MergeTo) ).

.net c# excel column AutoFit

I'm working with an excel object in c#. I want to auto-fit the columns, but like this: I want the columns' width to be 5 bigger than what the AutoFit method set.
How can I get the width after AutoFit() is used?
How can I make the columns 5 bigger than this width?

If you wish to use the Selection object and have IntelliSense with early binding, you need to cast the Selection object to a Range first:
Excel.Range selectedRange = (Excel.Range)myExcelApp.Selection;
selectedRange.Columns.AutoFit();
foreach (Excel.Range column in selectedRange.Columns)
{
column.ColumnWidth = (double)column.ColumnWidth + 5;
}
-- Mike

Assuming that you are on cell A1 & have long text in it, following code will make the column Autofit and then increase the width by 5 characters.
Selection.Columns.Autofit
Selection.Columns(1).ColumnWidth = Selection.Columns(1).ColumnWidth + 5

Try to loop through your rows to get the text length of it:
var row = 1;
ws.Column(1).AutoFit(ws.Cells[row, 1].Text.Length + 5);
Where ws is your Worksheet:
var pck = new ExcelPackage();
var ws = pck.Workbook.Worksheets.Add("Plan1")

Try Like this,
ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Sheet1");
//Load the datatable into the sheet, starting from cell A1. Print the column names on row 1
ws.Cells["A1"].LoadFromDataTable(data_table, true);
//Set full Sheet Auto Fit
ws.Cells[1, 1, data_table.Rows.Count, data_table.Columns.Count].AutoFitColumns();