c# - 使用 C# 将 Excel 导入 SQL Server 时出现 "The given ColumnMapping does not match up with any column in the source or destination"

Question

我收到错误

The given ColumnMapping does not match up with any column in the source or destination

使用以下代码

private void button1_Click_1(object sender, EventArgs e)
{
    of1.Filter = "Excel Files|*.xls;*.xlsx;*.xlsm";

    if ((of1.ShowDialog()) == System.Windows.Forms.DialogResult.OK)
    {
        imagepath = of1.FileName; //file path
        textBox1.Text = imagepath.ToString();
    }
}

private void loadbtn_Click(object sender, EventArgs e)
{
    string ssqltable = comboBox1.GetItemText(comboBox1.SelectedItem);
    string myexceldataquery = "select * from ["+ ssqltable + "$]";

    try
    {
        OleDbConnection oconn = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source="+imagepath+";Extended Properties='Excel 12.0 Xml; HDR=YES;IMEX=1;';");
        string ssqlconnectionstring = "Data Source=.;Initial Catalog=Bioxcell;Integrated Security=true";

        OleDbCommand oledbcmd = new OleDbCommand(myexceldataquery, oconn);
        oconn.Open();

        OleDbDataReader dr = oledbcmd.ExecuteReader();

        SqlBulkCopy bulkcopy = new SqlBulkCopy(ssqlconnectionstring);
        bulkcopy.DestinationTableName = ssqltable;

        while (dr.Read())
        {
            bulkcopy.WriteToServer(dr);
        }

        oconn.Close();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.ToString());
    }

    /* DisplayingData DD = new DisplayingData();
    DD.Show();*/
}

我认为 SQL Server 区分大小写，我复制了相同的列名，但出现了相同的错误..

有什么办法可以解决这个问题吗？

Answer 1

使用SqlBulkCopy.ColumnMapping像这样

for (int i = 0; i < dr.FieldCount; i++) {
    bulkcopy.ColumnMappings.Add(i, i);
}

我刚刚根据您的图像创建了一个测试表和一个测试文件。它对我来说效果很好，但只会添加第一行数据。

也许您应该使用DataTable并重试:

DataTable dt = new DataTable();
dt.Load(oledbcmd.ExecuteReader());
SqlBulkCopy bulkcopy = new SqlBulkCopy(ssqlconnectionstring);
bulkcopy.DestinationTableName = ssqltable;
for(int i = 0; i < dt.Columns.Count; i++){
    bulkcopy.ColumnMappings.Add(i,i);
}
bulkcopy.WriteToServer(dt);

当我尝试时，我的所有测试行都已添加到数据库中。