[英]C# Interop - Iterating through rows and deleting
我正在使用Excel Interop處理一些Excel工作表。 在工作表中,我需要遍歷行,如果行中的第一個單元格為空,則需要刪除整個行。 我嘗試了以下-
Excel.Range excelRange = sheet.UsedRange;
foreach (Excel.Range row in excelRange.Rows)
{
String a = ((Excel.Range)row.Cells[Type.Missing, 1]).Value2 as String;
if (a == null || a == "")
{
((Excel.Range)row).Delete(Type.Missing);
}
}
這根本沒有用。 有沒有其他方法可以做到這一點?
而且,是否有任何快速方法來查找和刪除工作表中的所有公式?
假設您的Excel文件如下所示。
刪除行的最佳方法是使用Excel的內置功能,稱為自動過濾器,該功能將過濾Col A中的空白值,然后一次性刪除整個行。
經過測試(在VS 2010 Ultimate中)
注意 :我更改了幾行,感覺在VS 2008中可能會出錯。由於我沒有VS 2008,因此無法在那里進行測試。 如果您遇到任何錯誤,請告訴我,我將予以糾正。
//~~> Open File
private void button1_Click(object sender, EventArgs e)
{
Microsoft.Office.Interop.Excel.Application xlexcel;
Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
Microsoft.Office.Interop.Excel.Range xlRange;
Microsoft.Office.Interop.Excel.Range xlFilteredRange;
xlexcel = new Excel.Application();
xlexcel.Visible = true;
//~~> Open a File
xlWorkBook = xlexcel.Workbooks.Open("C:\\MyFile.xlsx", 0, false, 5, "", "", true,
Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
//~~> Work with Sheet1
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
//~~> Get last row in Col A
int _lastRow = xlWorkSheet.Cells.Find(
"*",
xlWorkSheet.Cells[1,1],
Excel.XlFindLookIn.xlFormulas,
Excel.XlLookAt.xlPart,
Excel.XlSearchOrder.xlByRows,
Excel.XlSearchDirection.xlPrevious,
misValue,
misValue,
misValue
).Row ;
//~~> Set your range
xlRange = xlWorkSheet.Range["A1:A" + _lastRow];
//~~> Remove any filters if there are
xlWorkSheet.AutoFilterMode=false;
//~~> Filter Col A for blank values
xlRange.AutoFilter(1, "=", Excel.XlAutoFilterOperator.xlAnd, misValue, true);
//~~> Identigy the range
xlFilteredRange = xlRange.Offset[1,0].SpecialCells(Excel.XlCellType.xlCellTypeVisible,misValue);
//~~> Delete the range in one go
xlFilteredRange.EntireRow.Delete(Excel.XlDirection.xlUp);
//~~> Remove filters
xlWorkSheet.AutoFilterMode = false;
//~~> Close and cleanup
xlWorkBook.Close(true, misValue, misValue);
xlexcel.Quit();
releaseObject(xlRange);
releaseObject(xlFilteredRange);
releaseObject(xlWorkSheet);
releaseObject(xlWorkBook);
releaseObject(xlexcel);
}
private void releaseObject(object obj)
{
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
obj = null;
}
catch (Exception ex)
{
obj = null;
MessageBox.Show("Unable to release the Object " + ex.ToString());
}
finally
{
GC.Collect();
}
}
產量
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