Question

您好我有一个应用程序，用户浏览csv文件，csv文件中的数据只能使用BULK INSERT

写入表中

文本文件看起来像这样

Student_head    201501  
student_id  code    amount
1           salb    10015
2           salb    10016
3           salb    10017
4           c100    4000
5           salb    10022
END

我需要做的是跳过前2行和最后一行。

我应该得到这样的东西：

    1           salb    10015
    2           salb    10016
    3           salb    10017
    4           c100    4000
    5           salb    10022

我试过这段代码但似乎没有发生任何事情

        openFileDialog1.Filter = ".csv file|*.csv*";
        openFileDialog1.FilterIndex = 1;

        DialogResult result = openFileDialog1.ShowDialog();

        if (result == DialogResult.Yes)
        {
            String file = openFileDialog1.FileName;

            using (var reader = new StreamReader(file))
            {
                string firstLine = reader.ReadLine();
                string[] splitedLine = firstLine.Split(';');
                string month = splitedLine[1];
            }
            try
            { 
                string connect = "Data Source=George-PC\\SQLEXPRESS; Initial Catalog=Students; user id =sa; Password=george1";

                SqlConnection con = new SqlConnection(connect);
                con.Open();

                String BulkInsert = "BULK INSERT t_original FROM" +
                    file + "WITH (FIRSTROW = 3," +
                    "FIELDTERMINATOR = ''," +
                    "MAXERRORS = 0," +
                    "ROWTERMINATOR = '\\n')";
                //"UPDATE t_original"+
                //"SET month =" + month + 
                //"WHERE month is null";

                SqlCommand bulkCmd = new SqlCommand(BulkInsert, con);
                bulkCmd.ExecuteNonQuery();

任何帮助和建议将不胜感激

谢谢

Answer 1

不要使用SqlCommand，而是尝试使用SqlBulkCopy对象。

像...一样的东西。

DataTable table = new DataTable();
    //turn your CSV data into a DataTable using your favorite CSV parser.
    //My favorite is [`TextFieldParser`][2].

using SqlBulkCopy copier = new SqlBulkCopy(connectionString,
                  SqlBulkCopyOptions.KeepIdentity Or SqlBulkCopyOptions.KeepNulls) {
    // Now set up your column mappings via SqlBulkCopy.ColumnMappings
    // Choose a destination table with SqlBulkCopy.DestinationTableName

    // execute the copy
    copier.WriteToServer(table);
}

当我使用BULK INSERT时，如何跳过前2行和最后一行

1 个答案: