将文本文件数据插入到特定列的SQL Server数据库表中

Question

I have attached my code in which I tried to read a .txt file with many records.

The same text file data I need to insert into the SQL Server database table in specific columns. Here is the code I wrote by taking reference from some where.

protected void BtnUpload_Click(object sender, EventArgs e)
{
    FileUpload(x);
}

private void FileUpload(List<string> x)
{       
    SqlConnection con = new SqlConnection(conStr);
    SqlCommand cmd = new SqlCommand();

    string fileName = Path.Combine(@"C:\Users\user\Desktop\SBS", FileUpload1.FileName);        

    if(FileUpload1.HasFile)
    {
        try
        {
            con.Open();
            List<string> x;

            for (int i = 0; i <= x.Count - 9; i += 9)
            {
                SqlCommand myCommand = new SqlCommand("INSERT INTO SBSFile (SBSBranchCode, BranchName, FinYear, BrChallanNo, TransDate, MajorHead, ReceiptPayment, Amount, PlanNonPlan) " +
                           string.Format("Values('{0}', '{1}',  '{2}', '{3}', '{4}', '{5}', '{6}', '{7}', '{8}', '{9}')", x[i], x[i + 1], x[i + 2], x[i + 3], x[i + 4], x[i + 5], x[i + 6], x[i + 7], x[i + 8], x[i + 9]), con);
                myCommand.ExecuteNonQuery();
         }
         catch (Exception ex)
         {
         }
     }
 }

example of my file :

1 |abc| |bcd| |101|

here | denoted separator of column and yes every line should be inserted in the table where in specific column is available

Can anyone help me to insert file data into the SQL Server table?

Please help me to solve the issue

Answer 1

I wouldn't use a program at all... I'd use the "Import" feature in SQL server to import a pipe-delimited file. For example How to import pipe delimited text file data to SQLServer table

Answer 2

Here is an example of working code that will read data from a Text file, where that data is delimited by | . Multiple insert statements will be executed within a single transaction, in case of failure using an All Or Nothing principle.

[TestMethod]
public void TestInsertDataFromFile()
{
    String fileName = @"D:\SampleData.txt";
    String connectionString = @"Server=MyTestDBServer; Database=TestingDatabase; Trusted_Connection=True;";
    using (SqlConnection conn = new SqlConnection(connectionString))
    {
        conn.Open();

        using (SqlTransaction transaction = conn.BeginTransaction())
        {
            String insertCommand = @"INSERT INTO SBSFile (SBSBranchCode, BranchName, FinYear, BrChallanNo, TransDate, MajorHead, ReceiptPayment, Amount, PlanNonPlan) ";
            insertCommand += @"VALUES (@sbsBranchCode, @branchName, @finYear, @brChallanNo, @transDate, @majorHead, @receiptPayment, @amount, @planNonPlan)";

            String[] fileContent = File.ReadAllLines(fileName);

            using (SqlCommand command = conn.CreateCommand())
            {
                command.CommandText = insertCommand;
                command.CommandType = CommandType.Text;
                command.Transaction = transaction;

                foreach (String dataLine in fileContent)
                {
                    String[] columns = dataLine.Split('|');
                    command.Parameters.Clear();

                    command.Parameters.Add("sbsBranchCode", SqlDbType.VarChar).Value = columns[0];
                    command.Parameters.Add("branchName", SqlDbType.VarChar).Value = columns[1];
                    command.Parameters.Add("finYear", SqlDbType.VarChar).Value = columns[2];
                    command.Parameters.Add("brChallanNo", SqlDbType.VarChar).Value = columns[3];
                    command.Parameters.Add("transDate", SqlDbType.VarChar).Value = columns[4];
                    command.Parameters.Add("majorHead", SqlDbType.VarChar).Value = columns[5];
                    command.Parameters.Add("receiptPayment", SqlDbType.VarChar).Value = columns[6];
                    command.Parameters.Add("amount", SqlDbType.VarChar).Value = columns[7];
                    command.Parameters.Add("planNonPlan", SqlDbType.VarChar).Value = columns[8];

                    command.ExecuteNonQuery();
                }
            }

            transaction.Commit();
        }
    }
}

Important things to note

1. NEVER have an empty catch {} handler as you will never know if there are problems.
2. When talking to the database using externally specified values, ALWAYS use parameters to prevent SQL Injection attacks.
3. Make use of Transactions if you are doing multiple inserts from a single source. It will make recovery possible without having to unpick the data manually.
4. Where possible (when classes implement IDisposable ) use a using(...) block to ensure resources are released and not blocking/locking.

Answer 3

use this code:

        SqlConnection con = new SqlConnection(conStr);
        SqlCommand cmd = new SqlCommand();

        string fileName = Path.Combine(@"C:\Users\user\Desktop\SBS", FileUpload1.FileName);

        if (FileUpload1.HasFile)
        {
            var lines = File.ReadAllLines(fileName);
            try
            {
                con.Open();

                foreach (var line in lines)
                {
                    var columns = line.Split('|');
                    SqlCommand myCommand = new SqlCommand("INSERT INTO SBSFile (SBSBranchCode, BranchName, FinYear, BrChallanNo, TransDate, MajorHead, ReceiptPayment, Amount, PlanNonPlan) " +
                               $"Values('{columns[0]}', '{columns[1]}','{columns[2]}','{columns[3]}','{columns[4]}','{columns[5]}','{columns[6]}','{columns[7]}','{columns[8]}''{columns[9]}')");
                    myCommand.ExecuteNonQuery();
                }
                con.Close();
            }
            catch (Exception ex)
            {
            }
        }