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問題是當我點擊保存按鈕的地方,這段代碼是......它說參數'@email'已經被定義......並且我想要發生的事情是在同一行從一個列插入2個文本框中的值
string[] email = new string[2];
email[0] = txtEmail1.Text;
email[1] = txtEmail2.Text;
MySqlCommand cmd;
cmd.CommandText = "INSERT INTO email(Id,email)VALUES(@Id,@email)";
cmd.Parameters.AddWithValue("@Id", int.Parse(txtId.Text));
for (int i = 0; i < 2; i += 1)
{
cmd.Parameters.AddWithValue("@email", email[i]);
cmd.ExecuteNonQuery();
if (i==2)
break;
}
您在列中插入兩個電子郵件,但您不能這樣做 –