Simple question.
I have an excel sheet that I want to use as a database. I use linq-to-excel and it works wonderfully except it only works if the header row is the first row in the sheet and the spreadhseets I need to run on have other (important to the owners) data in the first 7 rows with the header row appearing in the 8th row.
What's the best way I can cut out these first rows through C# temporarily, so I can run my program and then re-insert them back in place after I've changed whatever records/columns/etc I needed to?
You can use LinqToExcel's WorksheetRange() method to select the specific range of cell's you want to select. This also allows you to use the first row of the range as a header row.
Here's a code example:
var excel = new ExcelQueryFactory("excelFileName");
var indianaCompanies = from c in excel.WorksheetRange<Company>("B3", "G10")
where c.State == "IN"
select c;
And here's the documentation
Related
i have a small winforms application im working on and using ClosedXML to handle our excel files. Im trying to build the read logic in a way that no matter what row the headers are on, i can find that row and work with the data below that. Because our reports come from our enterprise reporting system, the files are not always the same in where they start with the data because the exports from our system appends the report filters and selections to the top x rows then below that it starts the data dump. So right now that only way i can get it to work is if i manually remove all those rows at the top and make the header row the first row.
Im looking for some assistance in how i can find the "header" row based on column names or any other method. I have already looked thru their wiki https://github.com/ClosedXML/ClosedXML/wiki but that only has mention of working with printing headers and footers..
Here is where i believe i need to focus my work, but unclear where to start:
// Look for the first row used
var firstRowUsed = ws.FirstRowUsed(); //{'Precision Calculator D'!A1:XFD1}
//var firstRowUsed = "'Precision Calculator D'!A9:XFD9";
// Narrow down the row so that it only includes the used part
var udasRow = firstRowUsed.RowUsed(); //{'Precision Calculator D'!A10:A10}
//var udasRow = "'Precision Calculator D'!A10:A10}";
// Move to the next row (it now has the titles)
udasRow = udasRow.RowBelow();
There are reports ive tried that have the header starting on row 5 and others that start on row 7 and so on, so there is no actual row that they will alays be on, so need to find a way to determine it automatically. is there anyway to determine the row that the column names are in? The columns will always be in the same order, so those i have determined.
So ran across this in a mention of closedXML and it def may help get me where i need to be, but unclear how to implement
var foundMonth = ws.Search("Month", System.Globalization.CompareOptions.OrdinalIgnoreCase);
Since it returns a IEnumerable there is a chance that there may be more than one cell with the value "Month" and in my file that im testing with, there is 2 rows that contain the word and not sure how i can determine in this case that i want the last cell it found if there are multiple.
Addressed the concern about the multiple cells returned, and can now determine which row the headers are on with the following:
var foundMonth = ws.Search("Month", System.Globalization.CompareOptions.OrdinalIgnoreCase);
var monthRow = foundMonth.Last().Address.ToString();
Still unclear how to implement this into the original code post above, so that the firstRowUsed is reflected correctly in this case would be A11:XFD11
After exhausting search of ClosedXML and reading thru a number of other questions, i was able to find a solution. Below is the code that will help set the used range based on my current data structure within the file..
var foundMonth = ws.Search("Month", System.Globalization.CompareOptions.OrdinalIgnoreCase);
var monthRow = foundMonth.Last().Address; // A11
var lastcell = ws.LastCellUsed().Address; // BC3950
var rangeUsed = ws.Range(monthRow, lastcell);
Since i have no idea where my header row will be from file to file, im searching for my column header name in column A, since all the usable data is mostly numbers i can safely assume that in column A, the last found instance of the word "Month" is my header row.
With that and the last cell used i am able to determine my data range as seen above. Although i still need to figure out how to replace my firstRowUsed logic to work the same way, this is a step closer to a final solution. Ill post back my findings on that one before i mark this question answered.
var firstRowUsed = ws.Range(monthRow, lastcell).FirstRowUsed();
This line provides you the same as this line below
var firstRowUsed = ws.FirstRowUsed();
I tried this logic with 3 different files, each one having more and less data and also having the header row on different rows. and works like a charm
I've 2 excel sheets(Sheet1 & Sheet2) in my Excel workbook. I want to copy row data from Sheet2 to Sheet1.
Condition is:
if Sheet2 copied row doesn't exist in Sheet1 then paste it otherwise don't paste the row.
Copied Rows except 1st row in Sheet2:
Range dataWithoutFirstRow = xlAccrualSheet.Range[xlAccrualSheet.UsedRange.Cells[2, 1],
xlAccrualSheet.UsedRange.SpecialCells(XlCellType.xlCellTypeLastCell)];
dataWithoutFirstRow.Copy();
Paste in below used range in Sheet1:
Range DataRange = xlAccrualWorkSheet.Cells[emptycell, 1];
DataRange.PasteSpecial(XlPasteType.xlPasteAllUsingSourceTheme);
Please Tell me How to check already exist rows in Sheet1.
Awaiting for Your Response
Please Tell me How to check already exist rows in Sheet1.
Use Range to read out all data from the workSheet. You are already doing a similar thing accrualSheet. Then, you can use range.Cells(i,j) or range.Rows(r).Value or even range.Rows(r).Cells(i,j) to get the data inside each specific row.
When pasting occurs, loop over all pasted rows, and for each pasted row compare it with rows from workSheet. You may do it directly by reading that on the fly (as mentioned above), or you may read all rows from workSheet and store them in a List and compare incoming rows against that list - it will work much faster that way.
Now, one of the most interesting things is probably what does it mean to "compare rows". Either you will need to compare all cells within a row with another one, or you will need to compare just a specific set of "columns" like "date, time, cause, origin, caseId" etc. But that.. noone knows, you said nothing about that. If there's no info on that, then you probably should compare whole rows and assume that any difference in any cell means that the rows are different.
I am currently using EPPlus library to export large amounts of data to several worksheets and tables in side each of those worksheets.
I have been able to create list validation and have it working via a lookup worksheet named range perfectly fine. However, I have come across some strange behaviour which I have been unable to figure out.
To begin:
I download the file. I open the file. I select a spreadsheet with a table, there are multiple rows in the table, there is a list validation column with Options Yes/No to select from a dropdown. Each row has this list validation.
Scenario 1:
I then create a new row in the excel table, by dragging from the bottom right corner of the excel table to create the new row. The formula was not copied to the new row. I have now lost the validation for a new row in my excel table.
Scenario 2:
I delete all existing rows in the excel table, except for the first row (which still contains list validation in the Yes/No column). I THEN create a new row in the excel table by dragging from the bottom right corner of the excel table to create the new row.
The formula IS copied to the new row, I can now insert new valid data into this row by using the provided validation.
The logic of my code:
Each cell has validation applied to it by a loop which gets the kind of validation the cell needs to have (i.e number, date, list, greater than, less than etc). List validation is accessed via a named table lookup address. There is NO XML output error and the file opens fine, I can access the list validation from the cells without any problem.
Things I have tried to fix this issue:
1) Fill the range of cells, THEN create the excel table from this range.
- The idea behind this is, to first have a selection of data created, then select the range and just turn it into an excel table. Default behaviour would be for new rows in a table to just copy the fomula from the row above. So this solution seems logical.
2) Create an excel table on a range of non-filled cells, then fill this range.
- The idea behind this is, there could have been a bug in the way EPPlus creates a table in the worksheet, or possibly there could be an issue with order of XML elements and really was simply just an experimental change.
The code:
var strategy = Strategy.CreateTableFirst;
ExcelRange subRowDataRange = null;
ExcelTable table = null;
if (strategy == Strategy.CreateTableFirst)
{
subRowDataRange = worksheet.Cells[headerRowIndex, worksheet.Dimension.Start.Column, ToRow: headerRowIndex + groupedRowData.Count(), ToCol: dataFields.Count()];
table = worksheet.Tables.Add(subRowDataRange, Name: null); // Auto generate Excel table name
table.TableStyle = TableStyles.Light13;
}
foreach (var field in dataFields)
{
// Headers
if (strategy == Strategy.CreateTableFirst)
{
table.Columns[dataFields.IndexOf(field)].Name = field.Name;
}
else
{
worksheet.Cells[headerRowIndex, columnIndex].Value = field.Name;
}
// Help Text
if (field.HelpText.HasValue())
{
worksheet.Cells[headerRowIndex, columnIndex].AddComment(field.HelpText, Author: "System");
}
int dataRowIndex = headerRowIndex + 1; // First row in the datatable
if (groupedRowData.None())
{
worksheet.Cells[dataRowIndex, columnIndex].Set(field, owner: owner, rowIndex: null, addValidation: true);
}
// Add SubRows
foreach (var rowData in groupedRowData)
{
worksheet.Cells[dataRowIndex, columnIndex].Set(field, owner: owner, rowIndex: rowData.Key, addValidation: true);
dataRowIndex++;
}
columnIndex++;
}
if (strategy == Strategy.CreateTableLast)
{
subRowDataRange = worksheet.Cells[headerRowIndex, worksheet.Dimension.Start.Column, ToRow: worksheet.Dimension.End.Row + 1, ToCol: dataFields.Count()];
table = worksheet.Tables.Add(subRowDataRange, Name: null);
table.TableStyle = TableStyles.Light13;
}
}
This is the output table in excel after the code:
The funny thing is, the cell validation is copied down to the next row fine if I create the table manually and have the first row set with the data, then drag down to make a new row and it copies over fine. I'm not sure how I am going to be able to export multiple rows of data and be assured that when a user inserts a new row, validation is copied down.
I downloaded the Microsoft XML SDK to compare the excel table with 1 row (which I am then able to drag down to create a second row with copied formula) and the original downloaded excel file with many rows in the excel table.
The results are almost identical with regards to the excel table in XML output.
Also nothing seems out of place after deleting the rows and saving the file for comparison.
Any EPPlus gurus have an idea?
Update: 30/04/2015. Client understands the issue and accepts it for what it is. No solution has been found.
I'm not familiar with EPPlus, but I've had this issue in VBA before and was able to force the table to fill by using VBA script that looks something like this:
LastRow = Cells.Find("*", SearchOrder:=xlByRows, SearchDirection:=xlPrevious).Row
Range(Cells(TopRowOfTable,ColumnOfTableRow1),Cells(LastRow,ColumnOfTableRow1).Filldown
Basically just finding the last row, then using the filldown command to force the field to fill.
I am trying to pull an entire row of values off of an excel file using linq to excel. I have all of the column names (there's 104 different ones) and now I just need to get the one row of values associated with each header. What I would like to do is just pull the entire second row of values, but I haven't been able to figure a work around for that.
Does anyone know of a way to just pull one row? Or do I need to approach this differently and pull the individual value by the header name.
Thank you.
Use the LinqToExcel.Row class (Documentation)
var excel = new ExcelQueryFactory("excelFileName");
var firstRow = excel.Worksheet().First();
var companyName = firstRow["CompanyName"];
I am inserting data to Excel using C#. Whenever I add a new row to Excel using C# I want the same format as above row i.e, color, font and background color everything by programmatically.
It's an OLEDB insert.
Post insert, I want to apply the format of first row to the second row. With format painter from UI it's a straightforward job, I can't find a way to do the same with C#.
1) First you Need to get the Range you want to copy for e.g. RngToCopy
2) Then Set the Range where you want to insert.
3) use the below mentioned code snippet.
Range RngToCopy = ws.get_Range(StartCell, EndCell).EntireRow;
Range RngToInsert = ws.get_Range(StartCell, Type.Missing).EntireRow;
oRngToInsert.Insert(Microsoft.Office.Interop.Excel.XlInsertShiftDirection.xlShiftDown, oRngToCopy.Copy(Type.Missing));
//ws is the worksheet object, set StartCell and EndCell as per your requirement