如果我有很多數據(100000+行)並且我不想複製數據,那麼使用的語法是什麼?當我將更多數據添加到表格中時?我想在SQL Server中導入數據網格,但我不想複製數據
這是我插入數據按鈕的樣子:
private void button8_Click(object sender, EventArgs e)
{
string constring = @"DELETED FOR SECURITY REASONS";
using (SqlConnection con = new SqlConnection(constring))
{
for (int i = 0; i < dgvEmployees.Rows.Count - 1; i++)
{
var str = @"INSERT INTO USERSTable VALUES ('" +
dgvEmployees.Rows[i].Cells["Issuer"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Customer"].Value + "'," +
dgvEmployees.Rows[i].Cells["Card"].Value + ",'" +
dgvEmployees.Rows[i].Cells["License plate No"].Value +
dgvEmployees.Rows[i].Cells["Transactiondate"].Value + "', '" + dgvEmployees.Rows[i].Cells["Product description (com.)"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Quantity"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Gross CC"].Value + "', '" +
dgvEmployees.Rows[i].Cells["VAT1"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Voucher"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Mileage"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Additional info"].Value + "', '" + dgvEmployees.Rows[i].Cells["Supply country"].Value + "', '" + dgvEmployees.Rows[i].Cells["Site Town"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Product DEL"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Unitprice"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Amount"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Discount"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Surcharge"].Value + "', '" +
dgvEmployees.Rows[i].Cells["VAT"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Suppliercurrency"].Value + "', '" + dgvEmployees.Rows[i].Cells["Invoice No"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Invoice date"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Invoiced?"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Vat2010"].Value + "', '" +
dgvEmployees.Rows[i].Cells["State"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Supplier"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Cost 1"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Cost 2"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Reference No"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Recordtype"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Amount other"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Is listprice ?"].Value + "', '" + dgvEmployees.Rows[i].Cells["Date to"].Value + "', '" +
dgvEmployees.Rows[i].Cells["Final Trx."].Value + "', '" +
dgvEmployees.Rows[i].Cells["LPI"].Value + "', '" + "');";
try
{
using (SqlCommand com = new SqlCommand(str, con))
{
con.Open();
com.ExecuteNonQuery();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
con.Close();
}
MessageBox.Show("Records uploaded.");
}
}
任何幫助將不勝感激...
謝謝...
你的問題只是不可讀... – mauro
在數據庫端處理它。添加一個唯一的約束 – apomene
[SQL注入警報](http://msdn.microsoft.com/en-us/library/ms161953%28v=sql.105%29.aspx) - 你應該**永遠**永遠**連接在一起你的SQL語句是這樣的; **總是**使用**參數化查詢**,而不是避免SQL注入 - 檢查[小Bobby表](https://xkcd.com/327/) –