c# - 在文本中查找 datagridview 列的每个值的出现并将每个出现显示到下一列

Question

我这里有问题。我正在尝试显示 datagridview 列“值”中每个字符串出现的次数。我试图在每个值旁边显示每个事件（例如我想要这个：71->4、83->7、0B->6 等）。这是我的代码。结果我只接受第一个。提前致谢。

    private void button4_Click(object sender, EventArgs e)
    {
        string Text = richTextBox1.Text;

        string[] words = Text.Split(' ');
        foreach (string word in words)
        {
            dataGridView1.Rows.Add(word);
        }

        string searchTerm = " " ;
        foreach (DataGridViewRow r in dataGridView1.Rows )
        {
            if (searchTerm == null || searchTerm == String.Empty || searchTerm.Trim().Length == 0)
            {
                searchTerm = r.Cells["Value_Detected"].Value.ToString();

                var matchQuery = from wor in words
                                 where wor.ToUpperInvariant() == searchTerm.ToUpperInvariant()
                                 select wor;


                int wordCount = matchQuery.Count();

                r.Cells["Occur"].Value = wordCount.ToString();
            }


        }




        button4.Enabled = false;
    }

Answer 1

代替

if (searchTerm == null || searchTerm == String.Empty || searchTerm.Trim().Length == 0)

它应该是 ：

if (r.Cells["Value_Detected"].Value != null)