在C#中过滤Excel文件

Question

我已经为此工作了 2 天，我有 excel 文件包含类型和数字，我需要获取特定类型的所有数字，

我尝试过这个，但对我不起作用：

public void ReadExcel(string SelectedType)
{
    string excelName = "";            
    OpenFileDialog dialogRead = new OpenFileDialog();
    dialogRead.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
    dialogRead.ShowDialog();
    excelName = dialogRead.FileName;
    Application excelApp = new Application();
    Workbook workbook = excelApp.Workbooks.Open(excelName);
    Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook
        .Sheets["INVENTORY "];
    FilterByCellValue(worksheet, "V", SelectedType);
    string newFilePath = "FilteredExcelFile.xlsx";
    workbook.SaveAs(newFilePath);
    excelApp.Quit();
}
static void FilterByCellValue(Microsoft.Office.Interop.Excel.Worksheet worksheet, string column, string cellValue)
{
    Range dataRange = worksheet.UsedRange;
    Range filterColumn = (Range)dataRange.Columns[column];

    filterColumn.AutoFilter(1, cellValue, XlAutoFilterOperator.xlFilterValues, Type.Missing, true);
}

我期望获得选择类型的所有数字，但我得到这个异常_Range类的AutoFilter方法失败

Answer 1

正确过滤范围。这是我为您创建的一个示例。

using Excel = Microsoft.Office.Interop.Excel;

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
           // Hardcoded Excel filename. Change as applicbale
           string excelName = "C:\\Temp\\Book1.xlsx";

           Excel.Application excelApp;
           Excel.Workbook xlWorkBook;
           Excel.Worksheet xlWorkSheet;
            
           excelApp = new Excel.Application{Visible = true};
           xlWorkBook = excelApp.Workbooks.Open(excelName);

           // Change the name of the sheet here
           xlWorkSheet = xlWorkBook.Sheets["Sheet1"];

           // I have hardcoded the filter value. change as applicable
           string SelectedType = "4";

            FilterByCellValue(xlWorkSheet, "V", SelectedType);
        }

        static void FilterByCellValue(Excel.Worksheet worksheet, string column, string cellValue)
        {
            object misValue = System.Reflection.Missing.Value;

            Excel.Range dataRange = worksheet.UsedRange;
            
            // Get the column number where you want to filter
            int ColNumber = worksheet.Range[column + 1].Column;

            // Filter the data range
            dataRange.AutoFilter2(ColNumber, cellValue, Excel.XlAutoFilterOperator.xlFilterValues, misValue, true);
        }
    }
}

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