如何从DataTable中删除空行

Question

我正在努力将数据从Excel工作表导入数据库.Excel工作表包含几个空行,我想删除那些空行,然后将清除的数据插入数据库.
我通过引用其他代码编写了代码,这是插入值的代码:

OleDbConnection cnn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + txtExcelFile.Text + "';Extended Properties= 'Excel 8.0;HDR=Yes;IMEX=1'");
//DataTable dt = new DataTable();

try
{
    cnn.Open();
    OleDbDataAdapter data = new OleDbDataAdapter("select * from [Customers$]", cnn);
    data.Fill(dsExcel);
    dgvCustomers.ColumnHeadersVisible = false;

    SqlConnection connection = new SqlConnection("Data Source=COMPUTER-8EB749;Initial Catalog=KITS;Integrated Security=true");
    connection.Open();
    for (int i = 0; i < dsExcel.Tables[0].Rows.Count; i++)
    {
        string ID = ds.Tables[0].Rows[i][0].ToString();
        Int16 CustID = Convert.ToInt16(ID);
        string CustName = dsExcel.Tables[0].Rows[i][1].ToString();
        string CardScheme = dsExcel.Tables[0].Rows[i][2].ToString();
        string Outlet = dsExcel.Tables[0].Rows[i][3].ToString();
        string TerminalNum = dsExcel.Tables[0].Rows[i][4].ToString();
        Int32 Terminal = Convert.ToInt32(TerminalNum);
        string Date1 = dsExcel.Tables[0].Rows[i][5].ToString();
        DateTime Date = Convert.ToDateTime(Date1);
        string Time = dsExcel.Tables[0].Rows[i][6].ToString();
        DateTime DateTime = Convert.ToDateTime(Time);
        string Amount1 = ds.Tables[0].Rows[i][7].ToString();
        double Amount = Convert.ToDouble(Amount1);

        SqlCommand com = new SqlCommand("insert into Customer(CustID,CustName,CardScheme,Outlet,TerminalNum,TranDate,TranDateTime,Amount) values ('" + CustID + "','" + CustName + "','" + CardScheme + "','" + Outlet + "','" + Terminal + "','" + Date + "','" + DateTime + "','" + Amount + "')", connection);
        com.ExecuteNonQuery();
    }
    connection.Close();
}
catch (Exception ex)
{
    MessageBox.Show(ex.Message);
}
finally
{
    MessageBox.Show("Data Inserted Successfully.");
}

任何人都可以说我如何删除空行,以便我只能插入数据？!

Answer 1

这将删除每个列包含任何内容或空格的所有行:

dataTable = dataTable.Rows
    .Cast<DataRow>()
    .Where(row => !row.ItemArray.All(field => field is DBNull || 
                                     string.IsNullOrWhiteSpace(field as string)))
    .CopyToDataTable();

Answer 2

试试这个.

public bool InsertRowsToDataBase()
{
    try
    {
        DataTable excelTable = new DataTable();

        string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + txtExcelFile.Text + "';Extended Properties= 'Excel 8.0;HDR=Yes;IMEX=1'";
        using (OleDbConnection cnn = new OleDbConnection(connString))
        {
            string query = "select * from [Customers$]";
            using (OleDbDataAdapter data = new OleDbDataAdapter(query, cnn))
            {
                data.Fill(excelTable);
            }
        }
        dgvCustomers.ColumnHeadersVisible = false;

        connString = "Data Source=COMPUTER-8EB749;Initial Catalog=KITS;Integrated Security=true";
        using (SqlConnection connection = new SqlConnection(connString))
        {
            connection.Open();
            for (int i = 0; i < excelTable.Rows.Length; i++)
            {
                //takes from the 3rd row
                if (i > 1)
                {
                    DataRow row = excelTable.Rows[i];
                    object ID = row[0];
                    if (ID != null && !String.IsNullOrEmpty(ID.ToString().Trim()))
                    {
                        Int16 CustID = Convert.ToInt16(ID);
                        string CustName = row[1].ToString();
                        string CardScheme = row[2].ToString();
                        string Outlet = row[3].ToString();
                        string TerminalNum = row[4].ToString();
                        Int32 Terminal = Convert.ToInt32(TerminalNum);
                        string Date1 = row[5].ToString();
                        DateTime Date = Convert.ToDateTime(Date1);
                        string Time = row[6].ToString();
                        DateTime DateTime = Convert.ToDateTime(Time);
                        string Amount1 = row[7].ToString();
                        double Amount = Convert.ToDouble(Amount1);

                        string columnNames = "CustID,CustName,CardScheme,Outlet,TerminalNum,TranDate,TranDateTime,Amount";
                        string query = String.Format("insert into Customer(0}) values ('{1}', '{2}','{3}','{4}','{5}','{6}','{7}','{8}')",
                            columnNames, CustID, CustName, CardScheme, Outlet, Terminal, Date, DateTime, Amount);
                        using (SqlCommand com = new SqlCommand(query, connection))
                        {
                            com.ExecuteNonQuery();
                        }
                    }
                }
                //this is your last row. do whatever you want with this
                DataRow lastRow = excelTable.Rows[excelTable.Rows.Count - 1];
            }
        }
        return true;
    }
    catch (Exception exception)
    {
        Elmah.ErrorSignal.FromCurrentContext().Raise(exception);
        return false;
    }
}

请注意,我只是检查ID是否为空并且不插入任何此类行,因为ID将是您表中的PK.

Answer 3

This will remove all empty rows from the data table:

DataTable dt = dt.Rows
                 .Cast<DataRow>()
                 .Where(row => !row.ItemArray.All(f => f is DBNull))
                 .CopyToDataTable();

OR

DataTable dt = dt.Rows
                 .Cast<DataRow>()
                 .Where(row => !row.ItemArray.All(f => f is DBNull || 
                                  string.IsNullOrEmpty(f as string ?? f.ToString())))
                 .CopyToDataTable();