我試圖制作一個代碼，將我所有的數據從網格插入到表格中。在網格中我顯示我需要的東西，這不是問題，或者它沒有給出錯誤顯示此錯誤：System.Data.SqlClient.SqlException：“{”附近的語法不正確string StrQuery; try { using (SqlConnection conn = new SqlConnection(stringcon)) { using (SqlCommand comm = new SqlCommand()) { comm.Connection = conn; conn.Open(); for (int i = 1; i < bunifuCustomDataGrid2.Rows.Count; i++) { StrQuery = @"INSERT INTO concediati VALUES (" + bunifuCustomDataGrid2.Rows[i].Cells["firstname"].ToString() + ", " + bunifuCustomDataGrid2.Rows[i].Cells["lastname"].ToString() + ", " + bunifuCustomDataGrid2.Rows[i].Cells["CARS"].ToString() + ", " + bunifuCustomDataGrid2.Rows[i].Cells["RENT"].ToString() + ", " + bunifuCustomDataGrid2.Rows[i].Cells["CLIENT"].ToString() + ");"; comm.CommandText = StrQuery; comm.ExecuteNonQuery(); } } } } catch (Exception) { throw; }更新了參數。string StrQuery; try { using (SqlConnection conn = new SqlConnection(stringcon)) { using (SqlCommand comm = new SqlCommand()) { comm.Connection = conn; conn.Open(); } } } }現在它給出了一個不同的錯誤：System.FormatException：“輸入字符串的格式不正確?！眻D片： capture1 capture25 capture25 capture25 capture5
3 回答
HUH函數
TA貢獻1836條經驗 獲得超4個贊
bunifuCustomDataGrid2.Rows[i].Cells["firstname"].ToString())為您提供方法的重寫實現ToString。這意味著您沒有從上面的代碼中獲得實際值。你應該bunifuCustomDataGrid2.Rows[i].Cells["firstname"].Value改用。
如果有幫助，請標記為已回答。
江戶川亂折騰
TA貢獻1851條經驗 獲得超5個贊
我檢查了您的代碼并進行了此更改。您可以使用以下代碼。
string StrQuery;
try
{
using (SqlConnection conn = new SqlConnection(stringcon))
{
for (int i = 0; i < bunifuCustomDataGrid2.Rows.Count; i++)
{
SqlCommand comm = new SqlCommand();
comm.Connection = conn;
StrQuery = @"INSERT INTO concediati(nume,prenume,idcar,idrent,idclient) VALUES (@name,@lastname,@car,@rent,@client)";
comm.Parameters.AddWithValue("@name", Convert.ToString(bunifuCustomDataGrid2.Rows[i].Cells["firstname"].ToString()));
comm.Parameters.AddWithValue("@lastname", Convert.ToString(bunifuCustomDataGrid2.Rows[i].Cells["lastname"].ToString()));
comm.Parameters.AddWithValue("@car", Convert.ToInt32(bunifuCustomDataGrid2.Rows[i].Cells["CARS"].ToString()));
comm.Parameters.AddWithValue("@rent", Convert.ToInt32(bunifuCustomDataGrid2.Rows[i].Cells["RENT"].ToString()));
comm.Parameters.AddWithValue("@client", Convert.ToInt32(bunifuCustomDataGrid2.Rows[i].Cells["CLIENT"].ToString()));
comm.CommandText = StrQuery;
conn.Open();
comm.ExecuteNonQuery();
conn.Close();
}
}
}
catch (Exception ex)
{
throw;
}
千萬里不及你
TA貢獻1784條經驗 獲得超9個贊
INSERT的文檔在表名和列列表之間顯示了一個空格，因此最好遵循該空格。
此外，您可以在循環外僅創建一次參數并在循環中設置它們的值（否則您需要對參數調用 .Clear() 并在每次迭代時重新創建它們）：
string sql = @"INSERT INTO concediati (nume, prenume, idcar, idrent, idclient) VALUES (@name, @lastname, @car, @rent, @client)";
using (SqlConnection conn = new SqlConnection(stringcon))
{
using (SqlCommand comm = new SqlCommand(sql, conn))
{
comm.Parameters.Add(new SqlParameter { ParameterName = "@name", SqlDbType = SqlDbType.VarChar, Size = 50 });
comm.Parameters.Add(new SqlParameter { ParameterName = "@lastname", SqlDbType = SqlDbType.VarChar, Size = 50 });
comm.Parameters.Add(new SqlParameter { ParameterName = "@car", SqlDbType = SqlDbType.Int });
comm.Parameters.Add(new SqlParameter { ParameterName = "@rent", SqlDbType = SqlDbType.Int });
comm.Parameters.Add(new SqlParameter { ParameterName = "@client", SqlDbType = SqlDbType.Int });
conn.Open();
for (int i = 0; i < bunifuCustomDataGrid2.Rows.Count; i++)
{
string firstName = Convert.ToString(bunifuCustomDataGrid2.Rows[i].Cells["firstname"].Value);
string lastName = Convert.ToString(bunifuCustomDataGrid2.Rows[i].Cells["lastname"].Value);
int car = Convert.ToInt32(bunifuCustomDataGrid2.Rows[i].Cells["CARS"].Value);
int rent = Convert.ToInt32(bunifuCustomDataGrid2.Rows[i].Cells["RENT"].Value);
int client = Convert.ToInt32(bunifuCustomDataGrid2.Rows[i].Cells["CLIENT"].Value);
comm.Parameters["@name"].Value = firstName;
comm.Parameters["@lastname"].Value = lastName;
comm.Parameters["@car"].Value = car;
comm.Parameters["@rent"].Value = rent;
comm.Parameters["@client"].Value = client;
comm.ExecuteNonQuery();
}
}
}
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