Question

我正在尝试使用以下代码从Excel文件中读取列的值：

FileStream stream = File.Open("excelfile.xlsx", FileMode.Open, FileAccess.Read);

            //2. Reading from a OpenXml Excel file (2007 format; *.xlsx)
            IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
            //...
            //4. DataSet - Create column names from first row
            excelReader.IsFirstRowAsColumnNames = true;
            DataSet result = excelReader.AsDataSet();

            //5. Data Reader methods
            Console.WriteLine("Results: " +excelReader.ResultsCount);
            while (excelReader.Read())
            {
                object[] values = new object[excelReader.FieldCount];
                excelReader.GetValues(values);

            }

            //6. Free resources (IExcelDataReader is IDisposable)
            excelReader.Close();

它如何设法例外：

“System.NotSupportedException未处理Message =”Ométodo especificadonãoésuportado。“Source =”Excel“StackTrace：在Excel.ExcelOpenXmlReader.GetValues（Object [] values）
中

我正在使用另一种方式来读取值，但我想稍微清理一下代码...... 这是上一个阅读周期：

FileStream stream = File.Open("excelfile.xlsx", FileMode.Open, FileAccess.Read);

        //2. Reading from a OpenXml Excel file (2007 format; *.xlsx)
        IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
        //...
        //4. DataSet - Create column names from first row
        excelReader.IsFirstRowAsColumnNames = true;
        DataSet result = excelReader.AsDataSet();

        //5. Data Reader methods
        Console.WriteLine("Results: " +excelReader.ResultsCount);
        while (excelReader.Read())
        {
            Console.WriteLine("Row:"+excelReader.GetValues())
            for (int i = 0; i < excelReader.FieldCount; i++ )
            {
                Console.Write(excelReader.GetValue(i)+ "|");
            }
            Console.WriteLine("");
        }

        //6. Free resources (IExcelDataReader is IDisposable)
        excelReader.Close();

我是否在使用getValues做错了什么？我以前用它来读取SQL记录......也许这是我正在使用的库的限制。

Answer 1

这确实是一个实施问题。希望有足够的人会发现这个功能对Ian在将来的版本中实现它非常有用。

目前不支持IDataReader的这种特殊方法 ExcelDataReader。我会打开这个问题，所以我们可以看看是否其他人也想要它

- 由Excel阅读器的Ian1971开发人员

似乎存在实施问题，因此我将使用第一种方法。

Answer 2

此代码工作形成了我：请考虑：我尝试ExcelDataReader V2.1.2.3版本，使用V3.4.0之类的更新版本。遇到.IsFirstRowAsColumnNames

的问题

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Excel;
using System.IO;

namespace TEST3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        DataSet result;

        private void btnOpen_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog ofd = new OpenFileDialog() { Filter = "Excel Wprkbook 97-2003|*.xls| Excel Workbook|*.xlsx", ValidateNames = true })
            {
                if (ofd.ShowDialog() == DialogResult.OK)
                {
                    FileStream fs = File.Open(ofd.FileName, FileMode.Open, FileAccess.Read);
                    IExcelDataReader reader;
                    if (ofd.FilterIndex == 1)
                        reader = ExcelReaderFactory.CreateBinaryReader(fs);
                    else
                        reader = ExcelReaderFactory.CreateOpenXmlReader(fs);
                    reader.IsFirstRowAsColumnNames = true;
                    result = reader.AsDataSet();
                    cboSheet.Items.Clear();
                    foreach (DataTable dt in result.Tables)
                        cboSheet.Items.Add(dt.TableName);
                    reader.Close();

                }
            }
        }

        private void dataGridView_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {

        }


        private void cbosheet_SelectedIndexChanged(object sender, EventArgs e)
        {
            dataGridView.DataSource = result.Tables[cboSheet.SelectedIndex];
        }
    }
}

如何使用getValues从Excel获取值？

2 个答案: