C# 为什么当我从datatable导出到csv时，它会按我想要的其他列进行相同的排序
我想将我的数据表导出到CSV。DataTable是按列CZA排序的，但当我导出它时，输出文件中的数据是按Nrkarty排序的 这是我的代码片段：C# 为什么当我从datatable导出到csv时，它会按我想要的其他列进行相同的排序,c#,sorting,csv,datatable,C#,Sorting,Csv,Datatable,我想将我的数据表导出到CSV。DataTable是按列CZA排序的，但当我导出它时，输出文件中的数据是按Nrkarty排序的 这是我的代码片段： time1 = dateTimePicker1.Text.ToString() + dateTimePicker3.Text.ToString()+":00"; time2 = dateTimePicker2.Text.ToString() + dateTimePicker4.Text.ToString()+":59"; DataTable DT3 =
time1 = dateTimePicker1.Text.ToString() + dateTimePicker3.Text.ToString()+":00";
time2 = dateTimePicker2.Text.ToString() + dateTimePicker4.Text.ToString()+":59";
DataTable DT3 = new DataTable();
{
using (SQLiteTransaction transaction = sql_con.BeginTransaction())
{
using (SQLiteCommand command = sql_con.CreateCommand())
{
command.CommandText = "SELECT IDX, Nrkarty, Czas FROM Zdarzenia WHERE datetime(Czas) BETWEEN datetime('" + time1 + "') AND datetime('" + time2 + "') ORDER BY Nrkarty";
DA = new SQLiteDataAdapter(command);
DA.AcceptChangesDuringFill = false;
DT3.Clear();
DT3.Columns.Clear();
DA.Fill(DT3);
DT3.Columns.Add("Kierunek", typeof(String));
DT3.Columns.Add("Status", typeof(int));
DT3.Columns.Add("Roznica", typeof(TimeSpan));
if (DT3.Rows.Count != 0)
{
DateTime tempczas = DateTime.Parse(DT3.Rows[0]["Czas"].ToString());
long temp = tempczas.Ticks;
long suma = 0;
long indeks = 0;
foreach (DataRow temprow in DT3.Rows)
{
DateTime czas = DateTime.Parse(temprow["Czas"].ToString());
long Ticks = czas.Ticks;
long roznica = Ticks - temp;
if (roznica < 0) { roznica = 0; }
long stala10m = new TimeSpan(0, 10, 0).Ticks;
long stala13h=new TimeSpan(17,0,0).Ticks;//zmiana zakladalem ze trwa 12 dlatego zrobilem 13 okazalo sie ze trwa 16 zrobilem 17
if (roznica < stala10m)
{
temprow["Roznica"] = roznica;
temprow["Kierunek"] = "X";//filtracja ktos nie wiedzial czy przylozyl
if (roznica == 0)//tylko dla pierwszej lini wynikow sortowania roznica =0;
indeks = 1;//domyslnie zakladam ze pierwszy wynik to przyjscie do pracy
}
else if (roznica < stala13h)
{
if (indeks == 0)
{
temprow["Roznica"] = new TimeSpan(0);
temprow["Kierunek"] = "WE";//jezeli parzyste przylozenie to to przylozenie musi byc rozpoczeciem pracy
indeks = 1;
}
else
{
temprow["Roznica"] = roznica;
suma += roznica;
temprow["Kierunek"] = "WY";//jezeli nieparzyste przylozenie to to przylozenie musi byc zakonczenie pracy
indeks = 0;
}
}
else
{
indeks = 1;
temprow["Roznica"] = new TimeSpan(0);
temprow["Kierunek"] = "WE";//jezeli minelo 17h od poprzedniego przylozenia to to przylozenie musi byc rozpoczeciem pracy
}
temp = Ticks;
temprow["Status"] = 0;
}
DT3.DefaultView.Sort = "Czas asc";
dataGridView1.DataSource = DT3;
DT4 = DT3;
TimeSpan ssuma = new TimeSpan(suma);
UInt32 czas_pracy = Convert.ToUInt32(ssuma.TotalMinutes);
UInt32 czas_h = czas_pracy / 60;
UInt32 czas_m = czas_pracy % 60;
textBox1.Text = czas_h.ToString();
textBox2.Text = czas_m.ToString();
try
{
dataGridView1.Columns["Czas"].DefaultCellStyle.Format = "yyyy-MM-dd HH:mm:ss";
dataGridView1.Columns["IDX"].Visible = true;
dataGridView1.Columns["Nrkarty"].Visible = true;
dataGridView1.Columns["Czas"].Width = 110;
dataGridView1.Columns["Nazwisko"].Width = 120;
dataGridView1.Columns["Imie1"].Width = 120;
//dataGridView1.Columns["Roznica"].DefaultCellStyle.Format = "HH:mm:ss";
}
catch (NullReferenceException)
{
// This happens when settings values are empty
}
}
}
transaction.Commit();
}
}
public static void ExportToSpreadsheet(System.Data.DataTable dt, Stream myStream, string CB1)
{
StreamWriter sw = new StreamWriter(myStream);//, System.Text.Encoding.Unicode);
int iColCount = dt.Columns.Count;
if (CB1 != "Wszystko")
{
for (int i = 0; i < iColCount; i++)
{
if ((dt.Columns[i].ColumnName == "Czas") || (dt.Columns[i].ColumnName == "Nazwisko") || (dt.Columns[i].ColumnName == "Imie1") || (dt.Columns[i].ColumnName == "Imie2"))
{
if (dt.Columns[i].ColumnName == "Czas")
{
sw.Write("Data;Czas");
}
else
sw.Write(dt.Columns[i]);
if (i < iColCount - 1)
{
sw.Write(";");
}
}
}
sw.Write(sw.NewLine);
foreach (DataRow dr in dt.Rows)
{
for (int i = 0; i < iColCount; i++)
{
if ((dt.Columns[i].ColumnName == "Czas") || (dt.Columns[i].ColumnName == "Nazwisko") || (dt.Columns[i].ColumnName == "Imie1") || (dt.Columns[i].ColumnName == "Imie2"))
{
if (!Convert.IsDBNull(dr[i]))
{
/*if (dt.Columns[i].ColumnName == "Czas")
{
string tmp = dr[i].ToString();
StringBuilder s = new StringBuilder(tmp);
char x1 = s[0];
char x2 = s[1];
char x3 = s[6];
char x4 = s[7];
s[0] = x3;
s[1] = x4;
s[6] = x1;
s[7] = x2;
sw.Write(s.ToString());
}
else*/
{
if (dt.Columns[i].ColumnName == "Czas")
{
string x = dr[i].ToString();
string y = x.Replace(' ', ';');
sw.Write(y);
}
else
sw.Write(dr[i].ToString());
}
}
if (i < iColCount - 1)
{
sw.Write(";");
}
}
}
sw.Write(sw.NewLine);
}
}
else
{
{
for (int i = 0; i < iColCount; i++)
{
if ((dt.Columns[i].ColumnName == "Nrkarty") || (dt.Columns[i].ColumnName == "Czas") || (dt.Columns[i].ColumnName == "Kierunek") || (dt.Columns[i].ColumnName == "Status"))
{
if (dt.Columns[i].ColumnName == "Czas")
{
sw.Write("Data;Czas");
}
else
sw.Write(dt.Columns[i]);
if (i < iColCount - 1)
{
sw.Write(";");
}
}
}
sw.Write(sw.NewLine);
foreach (DataRow dr in dt.Rows)
{
for (int i = 0; i < iColCount; i++)
{
if ((dt.Columns[i].ColumnName == "Nrkarty") || (dt.Columns[i].ColumnName == "Czas") || (dt.Columns[i].ColumnName == "Kierunek") || (dt.Columns[i].ColumnName == "Status"))
{
if (!Convert.IsDBNull(dr[i]))
{
/*if (dt.Columns[i].ColumnName == "Czas")
{
string tmp = dr[i].ToString();
StringBuilder s = new StringBuilder(tmp);
char x1 = s[0];
char x2 = s[1];
char x3 = s[6];
char x4 = s[7];
s[0] = x3;
s[1] = x4;
s[6] = x1;
s[7] = x2;
sw.Write(s.ToString());
}
else*/
{
if (dt.Columns[i].ColumnName == "Czas")
{
string x = dr[i].ToString();
//string x = ((DateTime)dr[i]).ToString("yyyy/MM/dd HH:mm:ss", CultureInfo.InvariantCulture);
string y = x.Replace(' ', ';');
sw.Write(y);
}
else
sw.Write(dr[i].ToString());
}
}
if (i < iColCount - 1)
{
sw.Write(";");
}
}
}
sw.Write(sw.NewLine);
}
}
}
sw.Close();
}
好的，我做到了。在将Datatable导入dataGridView之前，我只将DefaultView分配给Datatable
datatable = datatable.DefaultView.ToTable();