使用excel工作表C#中的列填充组合框

using Excel = Microsoft.Office.Interop.Excel;

// 打开Excel文件
Excel.Application excelApp = new Excel.Application();
Excel.Workbook workbook = excelApp.Workbooks.Open("文件路径");
Excel.Worksheet worksheet = workbook.Worksheets["工作表名称"];

Excel.Range columnRange = worksheet.UsedRange.Columns["列名"];

foreach (Excel.Range cell in columnRange.Cells)
{
    string cellValue = cell.Value.ToString();
    // 将cellValue添加到组合框中
}

workbook.Close();
excelApp.Quit();

System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet);
System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);
System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp);