错误:附加信息:外部表不是预期的格式 [英] ERROR: Additional information: External table is not in the expected format
问题描述
需要从Excel导入数据到MySQL。获取在 Excel工作表为数据库表时,我得到一个错误。我得到了这样的错误消息
Need to import data from excel to Mysql. I am getting an error when fetching the excel sheet to database table.i got an error message like this
外部表不是预期格式
在c#windows窗体application.So任何一个找到确切位置错误。
in c# windows form application.So any one find where exactly the error.
这是我试图
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$]", xlConn);
OleDbDataAdapter xlAdapter = new OleDbDataAdapter();
OleDbDataReader datare = selectCmd.ExecuteReader();
xlAdapter.Fill(data);
DataSet xlDataset = new DataSet();
string sqlConnectionString = MyConString;
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConnectionString))
{
bulkCopy.ColumnMappings.Add("id", "id");
bulkCopy.ColumnMappings.Add("password", "password");
bulkCopy.ColumnMappings.Add("name", "name");
bulkCopy.DestinationTableName = "TableName";
bulkCopy.WriteToServer(datare);
MessageBox.Show("Upload Successfull!");
}
}
}
}
谢谢在您的帮助提前。
Thanks for your help in advance.
推荐答案
除了异常,请确保您始终密切的联系。在任何情况下,下面可能会解决你的问题:
Beside the exception, make sure that you always close connections. In any case, the following might fix your issues:
String connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
"Data Source=" + TextBox1.Text + ";" +
"Extended Properties=Excel 8.0;";
using (OleDbConnection excel_con = new OleDbConnection(connectionString ))
{
excel_con.Open();
DataTable dtExcelData = new DataTable();
//[OPTIONAL]: It is recommended as otherwise the data will be considered as String by default.
dtExcelData.Columns.AddRange(new DataColumn[3] { new DataColumn("Id", typeof(int)),
new DataColumn("Name", typeof(string)),
new DataColumn("Password",typeof(string)) });
using (OleDbDataAdapter oda = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", 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,你的表名是正确的为好。
You have to make sure that the column names match and that you table name is correct as well.
这是基于发现了一个例子的这里。
This is based on an example found here.
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