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我想知道如何将一个文件夹导入数据网格视图 OpenFileDialog ofd = new OpenFileDialog();

        ofd.Filter = "XML Files (*.xml)|*.xml";

        if (ofd.ShowDialog()==System.Windows.Forms.DialogResult.OK)
        {

            string filename = ofd.FileName;

        }

        textBox4.Text = ofd.FileName;

        if (textBox4.Text==ofd.FileName)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(ofd.FileName);
            richTextBox1.Text = ofd.FileName;
        }    
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