Question

我想创建一个“另存为”按钮，它将使用.xsd XML模式验证dataGridView中的数据，然后再将其保存为XML文件。我们的想法是将填充了DGV数据的DataTable保存为XML，使用.xsd进行验证并在文件有效时将其删除，但只要文件正在使用就不可能。请帮忙。

private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
    {
        SaveFileDialog win = new SaveFileDialog();
        win.InitialDirectory = "e:\\";
        win.Filter = "XML document (xml)|*.xml";
        if (win.ShowDialog() == DialogResult.OK)
        {
            string file_name = win.FileName;

            DataTable table = new DataTable();
            table = (DataTable) dataGridView1.DataSource;
            table.WriteXml(file_name);

            XmlReaderSettings settings = new XmlReaderSettings();
            settings.Schemas.Add(null, "e:/katalog.xsd");
            settings.ValidationType = ValidationType.Schema;
            settings.ValidationEventHandler += new ValidationEventHandler(ValidationEventHandler);
            XmlReader read = XmlReader.Create(file_name, settings);
            do
            {
                read.Read();
            }
            while (!f);

            if (!f)
            {
                File.Delete(file_name);
            }
            f = true;         
        }
    }

    static bool f = true;

    static void ValidationEventHandler(object sender, ValidationEventArgs e)
    {
        switch (e.Severity)
        {
            case XmlSeverityType.Error:
                Console.WriteLine("Error: {0}", e.Message);
                f = false;
                break;
            case XmlSeverityType.Warning:
                Console.WriteLine("Warning {0}", e.Message);
                f = false;
                break;
        }
    }

Answer 1

If the question is why can't the file be deleted, it is because the XmlReader has the file open - call read.Close() before trying to delete the file.

C＃将填充了DGV数据的DataSet验证为XML

1 个答案: