gpt4 book ai didi

c# - 错误 : Additional information: External table is not in the expected format

转载 作者:行者123 更新时间:2023-11-29 02:52:25 26 4
gpt4 key购买 nike

需要将excel中的数据导入到Mysql中。将 excel 表 提取到数据库表 时出现错误。我收到了这样的错误消息

external table is not in the expected format

在 c# windows 窗体应用程序中。所以任何人都可以找到错误的确切位置。

这就是我想要的

using MySql.Data.MySqlClient;
using System;
using System.Data;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.Windows.Forms;

namespace IMPORT
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
String MyConString = "SERVER=*******;" +
"DATABASE=db;" +
"UID=uid;" +
"PASSWORD=pwd;" + "Convert Zero Datetime = True";

private void ButtonFile_Click(object sender, EventArgs e)
{
OpenFileDialog openfiledialog1 = new OpenFileDialog();
openfiledialog1.ShowDialog();
openfiledialog1.Filter = "allfiles|*.xls";
TextBox1.Text = openfiledialog1.FileName;
}

private void ButtonUpload_Click(object sender, EventArgs e)
{

String connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
"Data Source=" + TextBox1.Text + ";" +
"Extended Properties=Excel 8.0;";
OleDbConnection xlConn = new OleDbConnection(connectionString);
xlConn.Open();
DataTable data = new DataTable();
OleDbCommand selectCmd = new OleDbCommand("SELECT * FROM [Sheet1$]", xlConn);

OleDbDataAdapter xlAdapter = new OleDbDataAdapter();
OleDbDataReader datare = selectCmd.ExecuteReader();
xlAdapter.Fill(data);
DataSet xlDataset = new DataSet();
string sqlConnectionString = MyConString;

using (SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConnectionString))
{
bulkCopy.ColumnMappings.Add("id", "id");
bulkCopy.ColumnMappings.Add("password", "password");
bulkCopy.ColumnMappings.Add("name", "name");
bulkCopy.DestinationTableName = "TableName";
bulkCopy.WriteToServer(datare);
MessageBox.Show("Upload Successfull!");
}
}
}
}

提前感谢您的帮助。

最佳答案

除了异常,请确保您始终关闭连接。无论如何,以下内容可能会解决您的问题:

String connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
"Data Source=" + TextBox1.Text + ";" +
"Extended Properties=Excel 8.0;";
using (OleDbConnection excel_con = new OleDbConnection(connectionString ))
{
excel_con.Open();

DataTable dtExcelData = new DataTable();

//[OPTIONAL]: It is recommended as otherwise the data will be considered as String by default.
dtExcelData.Columns.AddRange(new DataColumn[3] { new DataColumn("Id", typeof(int)),
new DataColumn("Name", typeof(string)),
new DataColumn("Password",typeof(string)) });

using (OleDbDataAdapter oda = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", excel_con))
{
oda.Fill(dtExcelData);
}
excel_con.Close();

string consString = MyConString;
using (SqlConnection con = new SqlConnection(consString))
{
using (SqlBulkCopy sqlBulkCopy = new SqlBulkCopy(con))
{
//Set the database table name
sqlBulkCopy.DestinationTableName = "dbo.TableName";
sqlBulkCopy.ColumnMappings.Add("Id", "Id");
sqlBulkCopy.ColumnMappings.Add("Password", "Password");
sqlBulkCopy.ColumnMappings.Add("Name", "Name");
con.Open();
sqlBulkCopy.WriteToServer(dtExcelData);
con.Close();
MessageBox.Show("Upload Successfull!");
}
}
}

您必须确保列名匹配并且表名也正确。

这是基于找到的示例 here .

关于c# - 错误 : Additional information: External table is not in the expected format,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34287602/

26 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com