[英]c# excel how to Find First Cell in a used range.
I can use XlCellType.xlCellTypeLastCell
to find last cell in the used range. 我可以使用XlCellType.xlCellTypeLastCell
来找到使用范围内的最后一个单元格。 How to get first cell in one line ? 如何在一行中获得第一个单元格?
Code to get last cell position. 代码以获取最后一个单元格位置。
Excel.Range mergeCells = (Excel.Range)mergeSheet.Cells[6,1].EntireRow;
var rowRng = mergeCells.SpecialCells(XlCellType.xlCellTypeLastCell, Type.Missing);
var colPosition = rowRng.Column;
One way is to get mergeCells.value
and loop through to increment a counter until I see null/empty value. 一种方法是获取mergeCells.value
并循环循环以增加计数器,直到看到空值/空值。 But I was hoping to get this in one line. 但是我希望能做到这一点。 Any ideas ? 有任何想法吗 ?
Test Cases: 测试用例:
(1) (1)
Expected Result colPosition = 1 预期结果colPosition = 1
Expected Result colPosition = 5 预期结果colPosition = 5
Here is a solution using the Excel Interop library (as tagged in the question). 这是使用Excel Interop库的解决方案(如问题中所标记)。 The below method will return a 1-based column index of the first cell in a given row. 下面的方法将返回给定行中第一个单元格的从1开始的列索引。 It worked for me on your supplied test cases as well as a few of my own. 它适用于您提供的测试用例以及我自己的一些用例。 Note that if you wish to simply use the first row in the used range - rather than a supplied row, you can find the first used row number using ActiveSheet.UsedRange.Rows[1].Row
. 请注意,如果您只想使用已使用范围中的第一行-而不是提供的行,则可以使用ActiveSheet.UsedRange.Rows[1].Row
查找第一个已使用的行号。
public static int FindFirstCellInExcelRow(string filePath, int rowNum)
{
Excel.Application xlApp = null;
Excel.Workbook wkBook = null;
Excel.Worksheet wkSheet = null;
Excel.Range range = null;
try
{
xlApp = new Excel.Application();
wkBook = xlApp.Workbooks.Open(filePath);
wkSheet = wkBook.ActiveSheet;
range = wkSheet.Cells[rowNum, 1].EntireRow;
if (range.Cells[1, 1].Value != null)
{
return range.Cells[1, 1].Column;
}
var result = range.Find(What: "*", After: range.Cells[1, 1], LookAt: Excel.XlLookAt.xlPart, LookIn: Excel.XlFindLookIn.xlValues, SearchOrder: Excel.XlSearchOrder.xlByColumns, SearchDirection: Excel.XlSearchDirection.xlNext, MatchByte: false, MatchCase: false);
int colIdx = result?.Column ?? 0; // return 0 if no cell in row contains value
return colIdx;
}
finally
{
wkBook.Close();
Marshal.ReleaseComObject(xlApp);
Marshal.ReleaseComObject(wkBook);
Marshal.ReleaseComObject(wkSheet);
Marshal.ReleaseComObject(range);
xlApp = null;
wkBook = null;
wkSheet = null;
range = null;
}
}
I highly (x10) recommend using ClosedXML over Microsoft's Excel libraries (unless you are using the old xls files). 我强烈(x10)建议在Microsoft的Excel库上使用ClosedXML(除非您使用的是旧的xls文件)。 Using ClosedXML you would do the following (this is taken right from their webpage): 使用ClosedXML,您将执行以下操作(此操作直接从他们的网页上进行):
Get it right off the NuGet packages. 立即从NuGet软件包中获取它。 Install-Package ClosedXML -Version 0.93.1
https://github.com/ClosedXML/ClosedXML/wiki/Finding-and-extracting-the-data https://github.com/ClosedXML/ClosedXML/wiki/Finding-and-extracting-the-data
var wb = new XLWorkbook(northwinddataXlsx);
var ws = wb.Worksheet("Data");
// Look for the first row used
var firstRowUsed = ws.FirstRowUsed();
// Narrow down the row so that it only includes the used part
var categoryRow = firstRowUsed.RowUsed();
// Move to the next row (it now has the titles)
categoryRow = categoryRow.RowBelow();
// Get all categories
while (!categoryRow.Cell(coCategoryId).IsEmpty())
{
String categoryName = categoryRow.Cell(coCategoryName).GetString();
categories.Add(categoryName);
categoryRow = categoryRow.RowBelow();
}
try the below code snippet, this will give the first row of a excel used range 尝试下面的代码片段,这将给出excel使用范围的第一行
Excel.Workbook xlWB = Globals.ThisAddIn.Application.ActiveWorkbook;
Excel.Worksheet xlWS = xlWB.ActiveSheet;
int firstRow = xlWS.UsedRange.Row;
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