C# 指示每个匹配记录的关键字匹配次数

如何获取csv文件中每个匹配记录的关键字匹配次数

我需要搜索csv文件中[StringData]中的所有字符，以找到包含单词的记录，以及文本框搜索中StringData中匹配的多次

代码

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您可以向DataTable添加一个新列，并使用以下方法计算每个行的内存值：

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另请参见：

谢谢您的帮助，兄弟，您真的救了我，但我想问，有没有办法将REGEXP\u计数放入Oledb查询中？所以我不需要再次循环数据

        string search = txtBoxSearch.Text;
        string pathOnly = Path.GetDirectoryName(csvPath);
        string fileName = Path.GetFileName(csvPath);

        string sql = @"SELECT F1 AS StringID, F2 AS StringContent FROM [" + fileName + "] WHERE F2 LIKE '%" + search + "%'";

        using (OleDbConnection connection = new OleDbConnection(
                  @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathOnly +
                  ";Extended Properties=\"Text;HDR=No\""))
        using (OleDbCommand command = new OleDbCommand(sql, connection))
        using (OleDbDataAdapter adapter = new OleDbDataAdapter(command))
        {
            DataTable dataTable = new DataTable();
            adapter.Fill(dataTable);
            GridViewResult.DataSource = dataTable;
            GridViewResult.DataBind();
        }

string search = txtBoxSearch.Text;
string pathOnly = Path.GetDirectoryName(csvPath);
string fileName = Path.GetFileName(csvPath);

string sql = @"SELECT F1 AS StringID, F2 AS StringContent FROM [" + fileName + "] WHERE F2 LIKE '%" + search + "%'";

using (OleDbConnection connection = new OleDbConnection(
          @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathOnly +
          ";Extended Properties=\"Text;HDR=No\""))
using (OleDbCommand command = new OleDbCommand(sql, connection))
using (OleDbDataAdapter adapter = new OleDbDataAdapter(command))
{
    DataTable dataTable = new DataTable();
    adapter.Fill(dataTable);
    dataTable.Columns.Add("MatchTimes", typeof(System.Int32));
    
    foreach(DataRow row in dataTable.Rows)
    {
        row["MatchTimes"] = Regex.Matches(row["StringContent"].ToString(), row["StringID"].ToString()).Count
    }

    GridViewResult.DataSource = dataTable;
    GridViewResult.DataBind();
}