我正在尝试将通用列表保存到SQL数据库。该代码采用HTML表文件,并使用HTMLAgilityPack拉出每列。当我设置contract.ToList();对于Datalist并显示它,数据是正确的。现在我无法将其保存到SQL数据库。
我以为我应该将列表存储在DataTable中然后使用SQLBulkCopy,但是我收到错误“无法将类型为'System.Collections.Generic.List`1 [ContractsImporter.Form1 + Contract]'的对象强制转换为'' System.Data.DataTable”。”使用下面的代码
DataTable dt = (DataTable)(dataGridView1.DataSource);
dataGridView2.DataSource = dt;
我还在努力学习C#,所以他们比我想做的更好吗?
感谢您的反馈。
此外,SQL表列名称与程序中的联系人变量名称相同。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Data.SqlClient;
using HtmlAgilityPack;
using System.Xml;
using System.Xml.Linq;
using System.Xml.XPath;
namespace ContractsImporter
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void buttonBrowse_Click(object sender, EventArgs e)
{
var DB = new System.Windows.Forms.OpenFileDialog();
if (DB.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
string fileToOpen = DB.FileName;
textBoxImport.Text = fileToOpen;
}
}
private void Form1_Load(object sender, EventArgs e)
{
}
public static void ImportData()
{
SqlConnection thisConnection = new SqlConnection("Server=sqlsrv1;Initial Catalog=LoadData;User ID=user;Password=password");
SqlCommand nonqueryCommand = thisConnection.CreateCommand();
}
public class Contract
{
public int ID { get; set; }
public string AssetManager { get; set; }
public string BillingAddress { get; set; }
public string BillingCity { get; set; }
public string BillingState { get; set; }
public string BillingZip { get; set; }
public string ContractAmount { get; set; }
}
private void buttonImport_Click(object sender, EventArgs e)
{
testing();
}
public void testing()
{
var data = File.ReadAllText(textBoxImport.Text);
var table = new DataTable("ImportTable");
string xmlData;
var document = new HtmlAgilityPack.HtmlDocument();
document.LoadHtml(data);
document.OptionOutputAsXml = true;
using (var stream = new StringWriter())
using (var writer = XmlWriter.Create(stream))
{
document.Save(writer);
xmlData = stream.ToString();
}
var contract =
XDocument.Parse(xmlData)
.XPathSelectElements("//table/tr")
.Skip(1)
.Select(x => new Contract
{
ID = int.Parse(x.Elements("td").First().Value),
AssetManager = x.Elements("td").Skip(1).First().Value,
BillingAddress = x.Elements("td").Skip(2).First().Value,
BillingCity = x.Elements("td").Skip(3).First().Value,
BillingState = x.Elements("td").Skip(4).First().Value,
BillingZip = x.Elements("td").Skip(5).First().Value,
ContractAmount = x.Elements("td").Skip(6).First().Value,
});
dataGridView1.DataSource = contract.ToList();
DataTable dt = (DataTable)(dataGridView1.DataSource);
dataGridView2.DataSource = dt;
label1.Text = "Done";
}
}
}