c#如何按预期名称在excel文件中搜索，没有'%example'%或列名='行值'之类的类型

Question

我在 youtube 上看过一个教程，该教程解释了如何在 excel 文件中搜索，但是当我连续搜索特定值时，我必须在搜索框中输入 column name = 'value at the row' 并且列名必须是一个单词，而不是用空格分隔的 2 个单词，否则我必须写 column name like '%value%' 以获得相似的结果。 when I search for a specific value in a row

to search for similar results

column name must be a single word

第一：如何通过在任意行写入特定关键字进行搜索。 第二：如何在组合框中加载列名并按列名搜索并使其可选择列。 代码：

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;

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

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void btnOpen_Click(object sender, EventArgs e)
        {
            using(OpenFileDialog ofd = new OpenFileDialog() { Filter = "Excel Workbook|*.xlsx",Multiselect = false})
            {
                if (ofd.ShowDialog() == DialogResult.OK)
                {
                    Cursor.Current = Cursors.WaitCursor;
                    DataTable dt = new DataTable();
                    using(XLWorkbook workbook = new XLWorkbook(ofd.FileName))
                    {
                        bool isFirstRow = true;
                        var rows = workbook.Worksheet(1).RowsUsed();
                        foreach(var row in rows)
                        {
                            if (isFirstRow)
                            {
                                foreach (IXLCell cell in row.Cells())
                                    dt.Columns.Add(cell.Value.ToString());
                                isFirstRow = false;
                            }
                            else
                            {
                                dt.Rows.Add();
                                int i = 0;
                                foreach (IXLCell cell in row.Cells())
                                    dt.Rows[dt.Rows.Count - 1][i++] = cell.Value.ToString();
                            }
                        }
                        dataGridView1.DataSource = dt.DefaultView;
                        lblTotal.Text = $"Total Records:{dataGridView1.RowCount}";
                        Cursor.Current = Cursors.Default;
                    }
                }
            }
        }

        private void btnSearch_Click(object sender, EventArgs e)
        {
            try
            {
                DataView dv = dataGridView1.DataSource as DataView;
                if (dv != null)
                    dv.RowFilter = txtSearch.Text;
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void txtSearch_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)13)
                btnSearch.PerformClick();
        }

        private void label2_Click(object sender, EventArgs e)
        {

        }

        private void txtSearch_TextChanged(object sender, EventArgs e)
        {

        }

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {

        }
    }
}

Answer 1

    static string ColumnNumberToColumnLetter(int colIndex)
    {
        int colnum = colIndex;
        string columnLetter = null;
        int mod = 0;
        while (colnum > 0)
        {
            mod = (colnum - 1) % 26;
            columnLetter = (char)(65 + mod) + columnLetter;
            colnum = (int)((colnum - mod) / 26);
        }
        return columnLetter;
    }


    string columnLetter = ColumnNumberToColumnLetter(27); //return AA