Question

我正在为客户开发一些工具，他们不想使用LINQ to SQL，他们也不想使用WPF，但我正在使用它，他们害怕新的编码或其他东西。 ..但是我不能用数据库，因为他们对LINQ一无所知......所以他们给了我这个讨厌的课程（http://pastebin.com/VUzvN44i太长了，不能粘贴在这里，对不起）这在检索时是“好的”逐行...

但是我有以下功能，它完全可以使用linq到sql，但我迷失了他们给我的这个课...所以如果有人可以给我一些建议如何做而不修改课程这将非常有帮助。感谢。

private void GenerarFichero_Click(object sender, RoutedEventArgs e)
{
    string valEmisora = "02827003";
    string codigoCabecera;
    if (DateTime.Today.Day > 7)
        codigoCabecera = "AE570200";
    else
        codigoCabecera = "AE570100";
    DataBaseDataContext dc = new DataBaseDataContext();
    using (StreamWriter sw = new StreamWriter(codigoCabecera.Remove(6, 2)))
    {
        sw.WriteLine("775701    " + DateTime.Now.ToString("yy") + DateTime.Now.Month.ToString("d2") + DateTime.Now.AddDays(1).Day.ToString("d2") + DateTime.Now.Hour.ToString("d2") + DateTime.Now.Minute.ToString("d2") + "008910                    00" + txtBanco.Text + codigoCabecera + txtBanco.Text + "");
        sw.WriteLine("0170      " + valEmisora + "    " + this.txtBanco.Text + "          10" + DateTime.Now.ToString("MM") + DateTime.Now.ToString("yy"));

        var OutputQuery =
            from o in dc.Seguros
            group o by o.emisora;
        List<int> TotalRegistros = new List<int>();
        List<int> TotalSumas = new List<int>();
        foreach (var grupo in OutputQuery)
        {
            sw.WriteLine("0270      " + valEmisora + grupo.Key + " " + this.txtBanco.Text + "          10" + DateTime.Now.ToString("MM") + DateTime.Now.ToString("yy"));
            List<int> Suma = new List<int>();
            foreach (var data in grupo)
            {
                Suma.Add(Convert.ToInt32(data.importe + data.importe_dec));
                sw.WriteLine("6070      " + valEmisora + data.emisora + "1" + data.banco + data.sucursal + data.fecha + data.importe + data.importe_dec + data.identificacion + "                      " + data.referencia);
            }
            TotalRegistros.Add((grupo.Count() + 2));
            TotalSumas.Add(Suma.Sum());
            sw.WriteLine("8070      " + valEmisora + grupo.Key + " " + (grupo.Count() + 2).ToString().PadLeft(6, '0') + "        " + Suma.Sum().ToString().PadLeft(12, '0'));
        }
        sw.WriteLine("9070      " + valEmisora + "    " + (TotalRegistros.Sum() + 2).ToString().PadLeft(6, '0') + "        " + TotalSumas.Sum().ToString().PadLeft(12, '0'));
        this.txtTotal.Text = TotalSumas.Sum().ToString();
    }
    MessageBox.Show("El fichero ha sido guardado, ya no se puede editar");
}

Answer 1

我并不为我所说的内容感到骄傲，但由于你迫切需要一个解决方案，所以它会...... 使用它的快速和肮脏方式是：

var connection = InitalizeConnectionToDb();
var select = new SelectBD();
// Get the data from database
select.Open(connection, @"select * from Seguros");
// Simulate the grouping
var dictionary = new Dictionary<string, List<DataRow>>();
foreach(var row in select.DataTable)
{
    var key = Convert.ToString(row["emisora"]);
    if(!dictionary.ContainsKey(key))
    {
        dictionary[key] = new List<DataRow>();
    }
    dictionary[key].Add(row);
}

现在您可以使用上面的字典来执行计算，因为数据按emisora字段分组。

Answer 2

好吧，我的最终代码正常运行，我已将OutputQuery替换为DataTable.AsEnumerable，实际上它正在运行......这就是代码现在的样子

private void GenerarFichero_Click(object sender, RoutedEventArgs e)
{
    string valEmisora = "02827003";
    string codigoCabecera;
    if (DateTime.Today.Day > 7)
        codigoCabecera = "AE570200";
    else
        codigoCabecera = "AE570100";
    using (StreamWriter sw = new StreamWriter(codigoCabecera.Remove(6, 2)))
    {
        sw.WriteLine("775701    " + DateTime.Now.ToString("yy") + DateTime.Now.Month.ToString("d2") + DateTime.Now.AddDays(1).Day.ToString("d2") + DateTime.Now.Hour.ToString("d2") + DateTime.Now.Minute.ToString("d2") + "008910                    00" + txtBanco.Text + codigoCabecera + txtBanco.Text + "");
        sw.WriteLine("0170      " + valEmisora + "    " + this.txtBanco.Text + "          10" + DateTime.Now.ToString("MM") + DateTime.Now.ToString("yy"));

        SelectBD sel = new SelectBD(App.ConexBD, "SELECT * FROM Seguros");
        var Query = sel.DataTable.AsEnumerable().Select(row =>
                {
                    return new      
                    {      
                        banco = row["banco"].ToString(),
                        emisora = row["emisora"].ToString(),
                        sucursal = row["sucursal"].ToString(),
                        fecha = row["fecha"].ToString(),
                        identificacion = row["identificacion"].ToString(),
                        importe = row["importe"].ToString(),
                        importe_dec = row["importe_dec"].ToString(),
                        provincia = row["provincia"].ToString(),
                        referencia = row["referencia"].ToString(),
                    };
                });
        var OutputQuery = Query.GroupBy(l => l.emisora);
        List<int> TotalRegistros = new List<int>();
        List<int> TotalSumas = new List<int>();
        foreach (var grupo in OutputQuery)
        {
            sw.WriteLine("0270      " + valEmisora + grupo.Key + " " + this.txtBanco.Text + "          10" + DateTime.Now.ToString("MM") + DateTime.Now.ToString("yy"));
            List<int> Suma = new List<int>();
            foreach (var data in grupo)
            {
                Suma.Add(Convert.ToInt32(data.importe + data.importe_dec));
                sw.WriteLine("6070      " + valEmisora + data.emisora + "1" + data.banco + data.sucursal + data.fecha + data.importe + data.importe_dec + data.identificacion + "                      " + data.referencia);
            }
            TotalRegistros.Add((grupo.Count() + 2));
            TotalSumas.Add(Suma.Sum());
            sw.WriteLine("8070      " + valEmisora + grupo.Key + " " + (grupo.Count() + 2).ToString().PadLeft(6, '0') + "        " + Suma.Sum().ToString().PadLeft(12, '0'));
        }
        sw.WriteLine("9070      " + valEmisora + "    " + (TotalRegistros.Sum() + 2).ToString().PadLeft(6, '0') + "        " + TotalSumas.Sum().ToString().PadLeft(12, '0'));
        this.txtTotal.Text = TotalSumas.Sum().ToString();
    }
    MessageBox.Show("El fichero ha sido guardado, ya no se puede editar");
}

数据库查询到foreach循环c＃

2 个答案: