无法为“"字段创建子列表"

问题描述

大家好，当我尝试将SQL数据库表的内容保存到XML文件时，抛出此错误，无论我哪里出错了，如果您能提供帮助，将不胜感激.感谢Louise :) x

Hi guys Its throwing this error when i try to save the contents of my SQL database table to an XML file, any idea where i am going wrong, it would be much appreciated if you could help. thanks Louise :) x

private void databasexml_Click(object sender, EventArgs e)
        {
            string sql = "SELECT * FROM BookDetails";
            DataSet ds = new DataSet();
            BindingSource bs = new BindingSource();
            SqlDataAdapter sda = new SqlDataAdapter(sql, stringConnection);

            try
            {
          
            ds.WriteXml("C:\\Users\\Louise Tooze\\Desktop\\XMLFile2");
            dataGridView1.DataMember = "BookDetails";
            sda.Fill(ds);
            
            dataGridView1.DataSource = ds;
            dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
            dataGridView1.Update();
            sda.Update(ds);

            sda.Dispose();

            MessageBox.Show("XML File created Successfully");
            }

            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

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