SQLite 多参数插入注意事项 insert multiple parameters

发布时间：2020-12-12 23:35:24 所属栏目：百科来源：网络整理

导读：1.) Do not reuse a parameter 2.) VALUES(@str,@new) ParameterName="@str." ParameterName="@new." As the error indicates,you are using the parameters @str and @new and adding two different parameters. Read the error message,it is there for a

1.) Do not reuse a parameter

2.) VALUES(@str,@new) ParameterName="@str." ParameterName="@new."
As the error indicates,you are using the parameters @str and @new and adding two different parameters. Read the error message,it is there for a reason and told you exactly what is wrong! 3.) Here is how I would write it (in this context). using (SQLiteConnection cnn = new SQLiteConnection("Data Source=C://EEk.db"))
using (SQLiteCommand cmd = Database.CreateCommand())
{
cmd.CommandText = "INSERT INTO test (Field1,fname) VALUES(@str,@new)";
cmd.Parameters.AddWithValue("@str",textBox1.Text);
cmd.Parameters.AddWithValue("@new",textBox2.Text);

cnn.Open();
cmd.ExecuteNonQuery();
cnn.Close();
} While you can use DbConnection and DbCommand and make a factory pattern sort of implementation (which I doubt is going here...) I suggest you do not. Use the SqliteConnection,SqliteCommand,etc. The provider specific objects generally have features that make coding easier. In this case,the AddWithValue method.

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!